7th Asia-PacificConference on
Unsaturated Soils
August 23 – 25, 2019
Nagoya Congress Center, Nagoya, JAPAN
Edited by
Iwai H.
Yoshikawa T.
Kim B.
Zhang F.

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Table of Contents
Preface.........................................................................................................................3
Committee members ............................................................................................ 4
Conference venue ...................................................................................................6
Access to Nagoya .................................................................................................................. 7
Area map around Nagoya Congress Center ............................................................... 8

AP-UNSAT2019 floor plan ................................................................................... 9
Session schedule .................................................................................................. 10
Day-1, August 23rd Friday .............................................................................................. 11Day-2, August 24th Saturday ......................................................................................... 12
Day-3, August 25th Sunday............................................................................................ 13

Keynote lecture list .............................................................................................. 14
Parallel session program ................................................................................... 17
Day-1, August 23rd Friday .............................................................................................. 17
Day-2, August 24th Saturday ......................................................................................... 23
Day-3, August 25th Sunday............................................................................................ 30

Abstract of Keynote lecture ..............................................................................34-2-

Preface
Following the success of the last conference held in Guilin, China, in 2015, the Japanese GeotechnicalSociety (JGS) is honored to host, on this great tradition of conference series, the 7th Asia-Pacific Conference
on Unsaturated Soils (AP-UNSAT2019) in Nagoya City, the geographical center of Japan.
The main purpose of the conference series related to unsaturated soils, which was firstly held in Singapore
in 2000, is to enhance attention and interests of the researchers and the engineers who specialize both intheoretical and practical applications to the mechanics for unsaturated soils in Asian Pacific region. Under thecontinuous support of the Technical Committee on Unsaturated Soils (TC106) of the International Society of
Soil Mechanics and Geotechnical Engineering (ISSMGE), the 2nd to 5th conferences were held in 2003 in
Osaka, Japan; 2007 in Nanjing, China; 2009 in Newcastle, Australia, and 2012 in Pattaya, Thailand
respectively. The conference series has provided a forum for the researchers and the engineers within andbeyond the existing region of unsaturated soils to present and access the latest developments and to exchange
their ideas on the subjects such as heave/desiccation shrinkage, collapse, rainfall-induced slope instability,
contaminant transport, carbon dioxide capture storage (CCS), geological repository of high level radioactive
waste (HLRW), and well-documented case histories from the region. The organizing committee of
AP-UNSAT2019 hope that all events during the conference may provide an easy-access bridge between thetheoretical researches and the practical applications related to unsaturated soils. In particular, young
researchers and engineers dealing with unsaturated soils are warmly encouraged to exchange their viewpoints
during the conference.
Thanks to the precious supports from all the participants, we have received 228 abstracts at first and thenreceived 161 paper submissions (102 full papers and 59 two-page extended abstracts) and 9 keynote papers
from 23 countries. Due to the hard working of the organizing committee, the preparing works went smoothly
and we really hope that all the participants could enjoy the conference, and also, the beauty of Nagoya.

Feng ZHANG, Professor of Nagoya Institute of Technology

Yuji KOHGO, Professor of Tokyo University of Agriculture and Technology

Yuji TAKESHITA, Professor of Okayama University-3-Conference ChairsProf. Feng ZHANG, Nagoya Institute of Technology
Prof. Yuji KOHGO, Tokyo University of Agriculture and Technology
Prof. Yuji TAKESHITA, Okayama University

Secretary General
Dr. Hiromasa IWAI, Nagoya Institute of Technology

Local Organizing Committee
Yin Cui

Yokohama National University

Kazunori Fuijisawa

Kyoto University

Shoichiro Hamamoto

University of Tokyo

Yosuke Higo

Kyoto University

Kohji Kamiya

Gifu University

Shoji Kato

Kobe University

Mamoru Kikumoto

Yokohama National University

Byeongsu Kim

Okayama University

Sayuri Kimoto

Kyoto University

Takeshi Kodaka

Meijo University

Hiroyuki Kyokawa

University of Tokyo

Kenichi Maeda

Nagoya Institute of Technology

Takaki Matsumaru

Railway Technical Research InstituteTomohiro Mori

Maebashi Institute of Technology

Yukihiro Morikawa

Nagoya Institute of Technology

Kentaro Nakai

Nagoya University

Masaki Nakano

Nagoya University

Toshihiro Noda

Nagoya University

Shintaro Ohno

Kajima Corporation

Hirotaka Saito

Tokyo University of Agriculture and Technology

Kazunari Sako

Kagoshima University

Takayuki Sakai

Nagoya University

Toshinori Sakai

Mie University

Kazuhide Sawada

Gifu University

Toshio Sugii

Chubu University

Atsushi Takai

Kyoto University

Hirofumi Toyota

Nagaoka University of Technology

Toshiyasu Unno

Utsunomiya University

Shotaro Yamada

Tohoku University

Hiroshi Yokawa

Chubu University

Takahiro Yoshikawa

Nagoya University-4-International Advisory Committee
Z. H. Chen

China

C. Ng

China

Y. J. Cui

FranceTA. Nishimura

Japan

J. ChuSingapore

TM. NishimuraJapan

A. GensSpain

H. Rahardjo

Singapore

L. HoyosUSA

S. M. Rao

India

B. HuatMalaysia

D. A. Sun

China

A. IizukaJapan

D. Sheng

Australia

T. Ishikawa

Japan

D. TollUK

A. Jotisankasa

ThailandR. Uzuoka

Japan

M. KazamaJapan

S. Vanapalli

CanadaT. Katsumi

Japan

C. F. Wei

China

M. KimuraJapan

W. M. Ye

China

N. Khalili

Australia

N. Yasufuku

Japan

J. KosekiJapan

L. M. Zhang

China

L. Laloui

Switzerland

E. C. Leong

Singapore

N. Lu

USA

S. W. Park

Korea

K. K. Muraleetharan USA
M. Sanchez

USA

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Conference Venue
Adress:Nagoya Congress Center, 1-1-1 Atsuta Nishimachi, Atsuta-ku,
456-0036 Nagoya, Aichi, Japan

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I

AccessAccess to NAGOYAInternational Flights
Nagoya is connected nationally and internationally by major airlines through Central Japan International Airport, "Centrair", the closest airport to the conference
venue (ai「port code: NGO). There a「e 262 weekly flights from 28 international destinations, including frequent connections to the major airports in Asia. It also
provides delegates from Europe and America with smooth access via other cities in Asia

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City/Country
Seoul, KOREA
Shanghai, CHINA
Beijing, CHINA
Taipei, TAIWAN, CHINA
Manila, PHILIPPINES
Hong Kong, CHINA
Bangkok, THAILAND
SINGAPORE Helsinki,
FINLAND Detroit,
USA Frankfurt,
GERMANY

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Time
2 Oh
2 5h
3 Oh
3 Oh
4 Oh
4 5h
6 Oh
7 Oh
10 Oh
11 5h
12 Oh

Frequency
6 Daily
7 Daily
2 Daily
3 Daily + 5/wk
1 Daily + 6/wk
2 Daily + 3/wk
1 Daily + 3/wk
Daily
Daily
6/wk
5/wk

Hancda•information about domestic transit is available in the "Domestic Flights andRailway" section below

Access to Nagoya via Domestic Flights and Train
Plane
It is convenient for overseas pa「tic1pants to transit via Narita International
Airport in Tokyo since there are 6 flights to Central Japan International Airpo「t(Centrai「) every day

Train
Nagoya Station is the hub of a railway network comprising JR, private railways
and subway lines. Nagoya is reached from Tokyo in around 100 minutes andOsaka or Kyoto within 1 hour by JR bullet trains (Nozomi Shinkansen)-7-

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AP-UNSAT2019 Floor Plan
Skyview Restaurant Pastel

Registration desk

Room 1Room141・142
TC106
Committee meetingRoom143

Registration desk
Coffee service
Day 1 AMDay 3 AM

Room 1Room141・142

Lunch Box

Bldg.3Bldg.2

Room 2
Room131・132

Bldg.1

Bldg.2

Bldg.3

Room 3
Room133・134

Coffee service
Day 1 PM/ Lunch timeDay 2 AM/PM/Lunch timeDay 3 Lunch time

Room 2

Room131・132

Bldg.4Day 1 Conference Reception
AtriumEntrance
SubwayHibinoSubwayNishi-takakura

Bldg.3Bldg.2

Skyview Restaurant Pastel
7F, Bldg.1

Cafeteria Cascade

Bldg.4

Day 2 Conference Dinner

AtriumCafeteria Cascade
B1F, Bldg.3

Bldg.1-9-

- 10 -

19:00
~

18:00

17:00

16:00

15:00

14:00

13:00

12:00

11:00

10:00

9:00

8:00

Thur., 22

17:50 - 19:40
Conference Reception Skyview Restaurant Pastel (7F, Bldg.1)

16:20 - 17:40
Parallel Session 3(room131 & 132, room133 & 134, 3F, Bldg.1; 4F, Bldg.1)

16:00 - 16:20
Coffee Break - Entrance Hall of 3F, Bldg.1

14:40 - 16:00
Parallel Session 2(room131 & 132, room133 & 134, 3F, Bldg.1; 4F, Bldg.1)

13:50 - 14:30
Keynote Lecture 4-Dr. Jubert Abdres Pineda
Plenary session room (4F, Bldg.1)

13:10 - 13:50
Keynote Lecture 3-Prof. Seong-Wan Park
Plenary session room (4F, Bldg.1)

12:10 - 13:10
Lunch - Japanese Lunch Box

10:50- 12:10
Parallel Session 1(room131 & 132, room133 & 134, 3F, Bldg.1; 4F, Bldg.1)

10:30 - 10:50
Coffee Break - Entrance Hall of 4F, Bldg.1

09:50 - 10:30
Keynote Lecture 2- Prof. Yu-Jun Cui
Plenary session room (4F, Bldg.1)

09:10 - 09:50
Keynote Lecture 1-Prof. Yuji Takeshita
Plenary session room (4F, Bldg.1)

08:40 - 09:10
Opening Remarks and Photo (Plenary session room, 4F, Bldg.1)

Fri., 23

15:00 - 18:00
Registration - Entrance Hall of 4F, Bldg.1

18:15 - 20:00
Conference Dinner Cafeteria Cascade (B1, Bldg.3)

16:40 - 18:00
Parallel Session 7(room131 & 132, room133 & 134, 3F, Bldg.1; 4F, Bldg.1)

16:20 - 16:40
Coffee Break - Entrance Hall of 3F, Bldg.1

15:00 - 16:20
Parallel Session 6(room131 & 132, room133 & 134, 3F, Bldg.1; 4F, Bldg.1)

13:50 – 14:50
Parallel Session 5(room131 & 132, room133 & 134, 3F, Bldg.1; 4F, Bldg.1)

13:00 - 13:40
Keynote Lecture 7-Dr. Xiong Zhang
Plenary session room (4F, Bldg.1)

12:00 - 13:00
Lunch -Japanese Lunch Box

10:40- 12:00
Parallel Session 4(room131 & 132, room133 & 134, 3F, Bldg.1; 4F, Bldg.1)

10:20 - 10:40
Coffee Break - Entrance Hall of 3F, Bldg.1

09:40 - 10:20
Keynote Lecture 6-Dr. Leong Eng Choon
Plenary session room (4F, Bldg.1)

09:00 - 09:40
Keynote Lecture 5-Prof.Weimin Ye
Plenary session room (4F, Bldg.1)

08:10 - 08:50
Second Asia-Pacific Distinguished Lecture on Unsaturated Soils
Prof. Daichao Sheng
Plenary session room (4F, Bldg.1)

Sat., 2408:00 - 12:00
Registration - Entrance Hall of 4F, Bldg.

08:00 - 17:00
Registration - Entrance Hall of 4F, Bldg.1

08:00 - 17:00
Registration - Entrance Hall of 4F, Bldg.1

APUNSAT-2019 in Nagoya, Aug. 23~Aug. 25

16:00 - 16:20
Closing Ceremony (room131 & 132, 3F, Bldg.1)

14:30 - 15:50
Parallel Session 10(room131 & 132, room133 & 134, 3F, Bldg.1)

13:00 - 14:20
Parallel Session 9(room131 & 132, room133 & 134, 3F, Bldg.1)

12:00 - 13:00
Lunch -Japanese Lunch Box

10:40- 12:00
Parallel Session 4(room131 & 132, room133 & 134, 3F, Bldg.1; 4F, Bldg.1)

10:20 - 10:40
Coffee Break - Entrance Hall of 3F, Bldg.1

09:40 - 10:20
Keynote Lecture 9-Prof. Ryosuke Uzuoka
Plenary session room (4F, Bldg.1)

09:00 - 09:40
Keynote Lecture 8-Prof.Tatsuya Ishikawa
Plenary session room (4F, Bldg.1)

Sun., 25

Mon., 26

8:00-18:00 Technical tour

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Parallel Session 2-1<A-3> Stress-strain behavior (2)Chairperson: Dr. Annan ZHOU

14:40 - 16:00

17:50 - 19:40

16:20 - 17:40

Parallel Session 3-2<D-1> Slope stability (2)Chairperson: Prof. Yanjun DU

Coffee Break (Entrance Hall of 3F, Bldg.1)

Parallel Session 2-2<D-1> Slope stability (1)Chairperson: Prof. Xianfeng LIU

Chairperson: Dr. A. Russell

Chairperson: Prof. T. Nishimura

Lunch - Japanese Lunch Box

Parallel Session 1-2<B-2> Laboartory and field measurements
Chairperson: Prof. Hirofumi TOYOTA

Coffee Break (Entrance Hall of 4F, Bldg.1)

Parallel Session 3-3<E-3> Expansive soil (2)Chairperson: Prof. Liming HU

Parallel Session 2-3<E-3> Expansive soil (1)Chairperson: Prof. Toshio SUGII

Parallel Session 1-3<A-4> Volume change and desiccation cracks
Chairperson: Prof. Yonggui CHEN

Conference Reception (Skyview Restaurant Pastel of 7F, Bldg.1), Speech by Prof. Yuji KOHGO

Parallel Session 3-1<A-3> Stress-strain behavior (3)Chairperson: Prof. Yi DONG

Keynote Lecture 4
Dr. Jubert Abdres Pineda

13:50 - 14:30

16:00 - 16:20

Keynote Lecture 3
Prof. Seong-Wan Park

13:10 - 13:50

12:10 - 13:10

10:50 - 12:10

Parallel Session 1-1<A-3> Stress-strain behavior (1)Chairperson: Prof. Zhenyu YIN

Chairperson: 10. Prof. H. Komine

Keynote Lecture 2
Prof. Yu-Jun Cui

09:50 - 10:30

10:30 - 10:50

Chairperson: Prof. Y. Kohgo

Keynote Lecture 1
Prof. Yuji Takeshita

09:10 - 09:50

Room 133 & 134 (3F, Bldg.1)
80名

Prof. Feng Zhang, Prof. Jun Otani, Prof. David Toll, Prof. Eun Chul Shin

Opening Remarks and Photo

08:40 - 09:10

Room 131 & 132 (3F, Bldg.1)
80名

Plenary session room (4F, Bldg.1)
160名

Time

DAY-1, Aug.23 (Friday)- 12 -

Keynote Lecture 5
Prof. Weimin Ye

Keynote Lecture 6
Dr. Leong Eng Choon

09:00 - 09:40

09:40 - 10:20

18:15 - 20:00

16:40 - 18:00

Parallel Session 7-2<C-2> Numerical modelling and analysis (1)Chairperson: Dr. Sayuri KIMOTO

Parallel Session 7-3<D-2> Hazards
Chairperson: Prof. Takeshi KODAKA

Conference Dinner (Cafeteria Cascade of B1, Bldg.3) Speech by Prof. Yuji Takeshita & Prof. Kenich Maeda

Parallel Session 7-1<A-2> Water-retention and hydraulic behavior (4)Chairperson: Prof. Guoqing CAI

15:00 - 16:20

Coffee Break (Entrance Hall of 3F, Bldg.1)

Parallel Session 6-3<E-1> Geo-environment (2)Chairperson: Dr. Giancarlo FLORESParallel Session 6-2<C-1> Constitutive modelling
Chairperson: Prof. Huaiping FENG

Parallel Session 6-1<A-2> Water-retention and hydraulic behavior (3)Chairperson: Dr. Tomohiro MORI

13:50 – 14:50

16:20 - 16:40

Parallel Session 5-3<E-1> Geo-environment (1)Chairperson: Dr. Kazunori FUJISAWA

Parallel Session 5-2<B-1> Advanced and new testing equipment (2)Chairperson: Prof. Maosong HUANG

Parallel Session 5-1<A-2> Water-retention and hydraulic behavior (2)Chairperson: Prof. Chaosheng TANG

Chairperson: Prof. W. L. Zou

Parallel Session 4-3
TC215 Special Session
Chairperson: Prof. A. (Malek) BOUAZZA

Room 133 & 134 (3F, Bldg.1)
80名

Keynote Lecture 7
Dr. Xiong Zhang

Lunch -Japanese Lunch Box

Parallel Session 4-2<B-1> Advanced and new testing equipment (1)Chairperson: Prof. Guanlin, YE

Coffee Break (Entrance Hall of 3F, Bldg.1)

Chairperson: Prof. A. Iizuka

Chairperson: Prof. H. Rahardjo

Chairperson: Prof. D. Toll

Room 131 & 132 (3F, Bldg.1)
80名

13:00 - 13:40

12:00 - 13:00

10:40- 12:00

Parallel Session 4-1<A-2> Water-retention and hydraulic behavior (1)Chairperson: Dr. Takaki MATSUMARU

Second Asia-Pacific Distinguished Lecture on
Unsaturated Soils
Prof. Daichao Sheng

08:10 - 08:50

10:20 - 10:40

Plenary session room (4F, Bldg.1)
160名

Time

DAY-2, Aug.24 (Saturday)

- 13 -

Parallel Session 9-3<A-1> Microstructure (1)Chairperson: Dr. Kazunari SAKO
Parallel Session 10-3
<A-1> Microstructure (2)Chairperson: Dr. Shoji KATO

Parallel Session 9-2<C-2> Numerical modelling and analysis (3)Chairperson: Dr. Mamoru KIKUMOTO
Parallel Session 10-2
<C-2> Numerical modelling and analysis (4)Chairperson: Dr. Yosuke HIGO
Closing Ceremony (Room 131 & 132, 3F, Bldg.1) Speech by Prof. Atsushi Iizuka

14:30 - 15:50

16:00 - 16:20

Parallel Session 8-3<E-2> Frozen soil
Chairperson: Prof. Sheng ZHANG

13:00 - 14:20

Parallel Session 8-2<C-2> Numerical modelling and analysis (2)Chairperson: Dr. Kentaro NAKAI
Lunch -Japanese Lunch Box

Parallel Session 8-1<A-5> Cyclic/dynamic behavior
Chairperson: Dr. Toshiyasu UNNO

Room 133 & 134 (3F, Bldg.1)
80名

12:00 - 13:30

10:40 - 12:00

Coffee Break (Entrance Hall of 4F, Bldg.1)

Chairperson: Prof. N. Yasufuku

Keynote Lecture 9
Prof. Ryosuke Uzuoka

09:40 - 10:20

10:20 - 10:40

Chairperson: Prof. C. F. Wei

Keynote Lecture 8
Prof. Tatsuya Ishikawa

09:00 - 09:40

Room 131 & 132 (3F, Bldg.1)
80名

Plenary session room (4F, Bldg.1)
160名

Time

DAY-3, Aug.25 (Sunday)

Keynote Lecture
Day 1 – August 23 Friday

Keynote Lecture 1
Aug.23 (Fri), 09:10 – 09:50, Plenary session room (4F, Bldg.1)
Chair: Prof. Y. Kohgo
v07.001“Field techniques for measuring soil hydraulic properties in unsaturated soils”
Professor, Yuji Takeshita (Okayama University, Japan)

Keynote Lecture 2
Aug.23 (Fri), 09:50 – 10:30, Plenary session room (4F, Bldg.1)
Chair: Prof. H. Komine
EA01“Soil-atmosphere interaction in embankments”
Professor, Yu-Jun Cui (Ecole des Ponts ParisTech, France)

Keynote Lecture 3
Aug.23 (Fri), 13:10 – 13:50, Plenary session room (4F, Bldg.1)
Chair: Prof. T. Nishimura
EA02“Effect of stress and suction on resilient modulus of compacted unbound materials”
Professor, Seong-Wan Park (Dankook University, Korea)

Keynote Lecture 4
Aug.23 (Fri), 13:50 – 14:30, Plenary session room (4F, Bldg.1)
Chair: Dr. A. Russel
v07.002“Environmental degradation of clayey rocks”
Dr. Jubert Abdres Pineda (The University of Newcastle, Australia)- 14 -

Keynote Lectures
Day 2 – August 24 Saturday

Second Asia-Pacific Distinguished Lecture on Unsaturated Soils
Aug.24 (Sat), 08:10 – 08:50, Plenary session room (4F, Bldg.1)
Chair: Prof. D. Toll
EA03

“Unusual geotechnical problems in high-speed railway embankments in cold climates”
Professor, Daichao Sheng (The University of Newcastle, Australia)

Keynote Lecture 5
Aug.24 (Sat), 09:00 – 09:40, Plenary session room (4F, Bldg.1)
Chair: Prof. H. Rahardio
EA04“Volume change behavior of highly compacted GMZ bentonite tested underchemo-hydro-mechanical conditions”
Professor, Wei-min Ye (Tongji University, China)

Keynote Lecture 6
Aug.24 (Sat), 09:40 – 10:20, Plenary session room (4F, Bldg.1)
Chair: Prof. A. Iizuka
v07.003“Soil-Water Characteristic Curves – Determination, etimation and aplication”
Dr. Leong Eng Choon (Nanyang Technology University, Singapore)

Keynote Lecture 7
Aug.24 (Sat), 13:00 – 13:40, Plenary session room (4F, Bldg.1)
Chair: Prof. W.L. Zou
v07.004“A photogrammetry-based method to measure the total and localized volume changes of
unsaturated soil specimens during triaxial testing”
Dr. Xiong Zhang (Missouri University, USA)- 15 -

Keynote Lectures
Day 3 – August 25 Sunday

Keynote Lecture 8
Aug.25 (Sun), 09:00 – 09:40, Plenary session room (4F, Bldg.1)
Chair: Prof. C.F. Wei
EA05“Unsaturated soil mechanics for disaster prevention and maintenance of traffic
infrastructure in snowy cold region”
Professor, Tatsuya Ishikawa (Hokkaido University, Japan)

Keynote Lecture 9
Aug.25 (Sun), 09:40 – 10:20, Plenary session room (4F, Bldg.1)
Chair: Prof. N. Yasufuku
v07.005“Three-phase coupled seismic analyses of unsaturated/saturated grounds”
Professor, Ryosuke Uzuoka (Kyoto University, Japan)- 16 -

Parallel Session
Day 1 – August 23 Friday
Parallel 1-1: <A-3> Stress-strain behavior (1)Aug.23 (Fri), 10:50 - 12:10, Plenary session room (4F, Bldg.1)
Chair: Prof. Zhenyu YIN
v07.006
Effect of suction stress on strength characteristics of a compacted silty soil under low confining pressure
Shoji Kato, Tara Nidhi Lohani, Byeong-Su Kim, Seong-Wan Parkv07.007
Predicting the shear strength of unsaturated soils
Y. Gao, D.A. Sun, A.N. Zhou, J. Li

v07.008
An improved equation for unsaturated shear strength behavior of soils
Hossain Md Sayem, Ling-wei Kong, Yong Wang

v07.009
Peak and Critical State Conditions for Unsaturated Sand
Bestun J. Shwan

v07.010
Experimental investigation on two stress variables proposed by Fredlund from deformation, strength andmoisture change under triaxial state of stressLong Zhang, Zhenghan Chen

EA06
Effect of drying and wetting processes on the shear strength behavior of unsaturated clayey soil
Pan Chen, Changfu Wei, Haifeng Lu, Jie Liu

Parallel 1-2: <B-2> Laboratory and field measurements
Aug.23 (Fri), 10:50 - 12:10, Room 131 & 132 (3F, Bldg.1)
Chair: Prof. Hirofumi TOYOTA
v07.011
Experimental study of moisture evaporation process with different soil characteristics
Ni An, Chao-Sheng Tang, Shi-Kang Xu, Xue-Peng Gong, Bin Shi, Hilary I. Inyang

EA07
Experimental verification of the continuous pressurization method on SWCC
Hyun Su Park, Byeong-Su Kim, Shoji Kato, Seong-Wan Park

EA08
Evaluation of capillary barrier system under lateral non-flow condition of sand layer
Byeong-Su Kim, Yuji Takeshita, Seong-Wan Park, Shoji Kato

EA09
Swelling-shrinkage deformation of an expansive soil foundation under high speed railway embankment loads:
a case study
Gaofeng Pan, Xianfeng Liu, Guanlu Jiang, Danxi Sun, Chala Ayele Tesema, Yan Feng

EA10
An experimental investigation of internal erosion around defective pipe in saturated-unsaturated soil
Dongmei Zhang, Weiwei Du, Chengpeng Gao

v07.012
Measurement of field-hydraulic soil properties using suction infiltrometer for soil-based pavement
T. Sugii, H. Yokawa, M. Ishii- 17 -

Parallel 1-3: Volume change and desiccation cracks
Aug.23 (Fri), 10:50 - 12:10, Room 133 & 134 (3F, Bldg.1)
Chair: Prof. Yonggui CHEN
v07.013
Desiccation cracking behavior of soils
Hao Zeng, Chao-Sheng Tang, Qing Cheng, Luan Lin, Jin-Jian Xu

v07.014
Study of evolution law of cracking for swelling mudstone of Sichuan central Redbeds in hydration process
CHEN Shanxiong, ZHOU Zhe, YU Fei, DAI Zhangjun, LI Jian

EA11
Influence of crack on soil resistance and measurement of crack depth
Liang Chen, Jianjian He, Shufa Yan

EA12Consequence of drying and wetting cycles on fracturing and electrical properties of soft soil
H. F. Zhao, Y. D. Chen

EA13
Experimental study on gas flow through a compacted cracked clay
Zhongkui. Chen, Rui. Chen, Charles W. W. Ng

EA14
Effect of biochar on desiccation cracking characteristics of a clayey soil
Kai Gu, Jinwen Li, Bingshu Zhang, Chaosheng Tang, Bin Shi- 18 -

Parallel 2-1: <A-3> Stress-strain behavior (2)Aug.23 (Fri), 14:40 - 16:00, Plenary session room (4F, Bldg.1)
Chair: Dr. Annan ZHOU
v07.015
Effects of inherent anisotropy on G0 of unsaturated sand
B. N. Le, H. Toyota, S. Takada

v07.016
Suction stress via thermo-servo/constant-water content ring shear testing
Ujwalkumar D. Patil, Laureano R. Hoyos, Jairo E. Yepes, Anand J. Puppala, Surya S. C. Congress

v07.017
Influence of degree of saturation on strength and consolidation properties of unsaturated soil and its
centrifuge modelling
Bhavita S. Dave, Chandresh H. Solanki, Atul K. Desai

v07.018
Effects of plastic reinforcement on unsaturated soil and its centrifuge modeling for an embankment
Bhavita S. Dave, Mihretab Madamo Lafebo, Chandresh H. Solanki, Atul K. Desai

v07.019
Study on Unsaturated Mechanical Properties of Lignin-Lime Improved Silt
Zhang Yanmei, Liu Jincheng, Zhang Xiaofeng, Cheng Feifei

v07.020
Role of hydromechanical properties of plant roots on unsaturated soil shear strength
Anthony K. Leung, David Boldrin, Ali A. Karimzadeh, Anthony G. BengoughParallel 2-2: <D-1> Slope stability (1)Aug.23 (Fri), 14:40 - 16:00, Room 131 & 132 (3F, Bldg.1)
Chair: Prof. Xianfeng LIU
EA15Infinite unsaturated soil slopes stability with tensile strength cut-off
LI Meng-zi, CAI Guo-qing, ZHAO Cheng-gang, YANG Bei-bei

v07.021
Incorporating suction in to stability charts for unsaturated soil slopes
Thanh Vo, Adrian R. Russell

v07.022
The role of wetting-induced expansion of unsaturated soils in potential shallow landslides
Shun-chao Qi, Jia-wen Zhou, Xing-Guo Yang, Gang Fan, Gongda Lu, Sai Vanapalli

v07.023
The effect of slope orientation on the stability of cut slopes in swelling rocks and soils: case studies from
Nanyang and Yanbian, China
Zhixiong Zeng, Lingwei Kong, Xianwei Zhang, Cheng Chen

EA16
Strength characteristics test of expansive soil with interlayer and slope stability analysis
Zhangjun DAI, Shanxiong CHEN, Jian LI, Guofang Xu

v07.024
Study on the mechanism of loess landslide induced by chlorine salt in Heifangtai terranJuan Wang, Wei Liu, Wenwu Chen, Peng Liu, Bobo Jia, He Xu- 19 -

Parallel 2-3: <E-3> Expansive soil (1)Aug.23 (Fri), 14:40 - 16:00, Room 133 & 134 (3F, Bldg.1)
Chair: Prof. Toshio SUGII
v07.025
SWCC of crushed bentonite under high suction ranges
Seiichi Narushima, Yasunori Arai, Yuki Sakoda, Tomoyoshi Nishimura

EA17
Investigation of experimental methods to derive soil water characteristic curve for the compacted bentonite
bufferSeok Yoon, Jae Owan Lee, Geon Young Kim

v07.026
Chemical influence on water retention behaviour of compacted bentonite
Bing Qin, Yang Lu, Zheng-han Chen

v07.027
Application of the Kita-Sako model to soil-water characteristic curves of bentonite/sand mixture
Kazunari Sako, Shin Sato, Motoki Moriiwa, Masaaki Fukaya, Syuichi Yamamoto, Shinichi Ito, Ryosuke Kitamura

EA18
Laboratory investigation on gas permeability of compacted GMZ bentonite under coupled effects of confiningpressure and water content
Jiang F. Liu, Hong Y. Ni, Xu. Chen, Yang G. Wang, Jian, Liu

v07.028
Quick identification of expansive soil in the field based on PIV technique
Yu-Zhou Hou, Guo-Wei Li, Jian-Tao Wu, Wei Chen

- 20 -

Parallel 3-1: <A-3> Stress-strain behavior (3)Aug.23 (Fri), 16:20 - 17:40, Plenary session room (4F, Bldg.1)
Chair: Prof. Yi DONG
v07.029
Determination of resistance parameters of compacted tropical soils in the state of Rio de Janeiro
Ramos, V. L. F. S., Mahler, C. F., Mainier, F. B., Januzzi, G. M. F.

v07.030
Laboratory tensile strength testing of clay soils using direct measurement
Wilson Pembele, Yilin Gui, Ross Stirling

v07.031
Change of pore-water pressure on creep behavior of an unsaturated silty soil
Tomoyoshi Nishimura, Nanako Tamura

v07.032
Collapse behaviour of compacted loess: role of the stress level on soil microstructure
Miaomiao Ge, Jubert A. Pineda, Daichao Sheng, Glen Burton, Ning Li

v07.033
Prediction of shrinkage behavior of soft soil using ramp loading consolidation theory
Yuan Zhang, Katayoon Tehrani, Alexander Scheuermann, Ling Li

EA19
Analysis of compressibility of red clay considering structural strength
Gu Jianxiao, Wang Yong, Liu Fabiao, Lyu Haibo

Parallel 3-2: <D-1> Slope stability (2)Aug.23 (Fri), 16:20 - 17:40, Room 131 & 132 (3F, Bldg.1)
Chair: Prof. Yanjun DU
v07.034
The mechanism of long-time displacement in a colluvium slope underlain by mudstone
Chia-Cheng Fan, Jun-Bin Luo, Ruey-Zen Changv07.035
Performance of filter gabion with pipe as a simple countermeasure against slope failures due to torrential
rainfalls
May Than Thar Cho, Anusron Chueasamat, Hirotaka Saito, Yuji Kohgo

EA20
Investigation on unsaturated slope stability influenced by rainfall and fluctuation of reservoir water level withvaried rainfall infiltration rates
X. Xiong, Z.M. Shi, Y.L. Xiong, F. Zhang

v07.036
A study of critical rainfall and landslide occurrence
Saurabh Gupta, Eng-Choon Leong

EA21
Models for estimating earthquake-induced sliding displacement of slopes considering pulse-like groundmotions
Yingbin Zhang, Jing Liu- 21 -

Parallel 3-3: <E-3> Expansive soil (2)Aug.23 (Fri), 16:20 - 17:40, Room 133 & 134 (3F, Bldg.1)
Chair: Prof. Liming HU
v07.037
Investigation on swelling behaviors of GMZ bentonite pellet mixtures
Z. Zhang, W.M. Ye, Q. Wang

v07.038
Volume change behavior of saturated compacted GMZ bentonite and slurry during cyclic loading-unloading
processes
Wang Yang, Ye Wei-Min, Wang Qiong, Chen Bao, Chen Yong-Gui

EA22
Effect of residual lateral stress on the swelling pressure of compacted bentonite/claystone mixture
Qiong Wang, Yu-jun Cui, Weimin Ye, Wei Su

v07.039
Evaluation of the relationship between swelling pressures determined by consolidation-swell test and constantvolume test
Zin Moe Htut, Mohammed Azhar M.M, Kuo Chieh Chaov07.040
Osmotic consolidation of expansive soil
S. Bulolo, E.C. Leongv07.041
Role of cohesive energy density in swelling behavior of expansive clays – a molecular-level simulation
approach
Sahel N. Abduljauwad, Habib-ur-Rehman Ahmed- 22 -

Parallel Session
Day 2 – August 24 Saturday
Parallel 4-1: <A-2> Water-retention and hydraulic behavior (1)Aug.24 (Sat), 10:40 - 12:00, Plenary session room (4F, Bldg.1)
Chair: Dr. Takaki MATSUMARU
v07.042
A simple device to measure soil water retention curve
Lin Liv07.043
Pore water pressure profile development through soil water characteristics curve determination utiliz-ing thecontinuous pressurization method
M. Hatakeyama, S. Kyono, N. Yasufuku, R. Ishikura, A. Alowaisy

v07.044
A new logarithmic dielectric constant model of soils
Hongjian Liao, Huan Dong, Chunming Ning, Junyu Sun

v07.045
A simple method of estimating soil-water characteristic curve using point pedotransfer functions
L. Zou, E.C. Leongv07.046
A simple and practical method for predicting soil water characteristic curve based on grading parameters
ZHANG ran Jun, WANG cui Xin, LIN hui Ye, JIANG Tong

EA23
Difference of SWRC and SWRC from MIP test of silty soil
Wen-Jing Sun, Yu-Jun Cui, De-an Sun

Parallel 4-2: <B-1> Advanced and new testing equipment (1)Aug.24 (Sat), 10:40 - 12:00, Room 131 & 132 (3F, Bldg.1)
Chair: Prof. Guanlin YE
v07.047
Matric suction and Stiffness measurement on fine content soils at low stress state
Laxmi Prasad Suwal, Reiko Kuwano

EA24
Study on relationship between dielectric constant and water content of lateritic clays and mixing models
Yunshan XU, Haibo LU, Zhaotian ZENG, De’an Sun

EA25Developing a flow pump apparatus for soil-water characteristics curve measurement
Louis Ge, Wen-Chieh Cheng, Chih-Wei Lu

v07.048
A system to measure permeability of unsaturated soils using local pin-type sensors in triaxial apparatus
Jaylord U. Tan Tian, Junichi Koseki, Hailong Wang, Hiroyuki Kyokawa, Takeshi Sato

EA26
Measurement and modelling triaxial stress-dependent water permeability of collapse loess
D. F. Zhang, C. L. Chen, H. Chen

EA27
Pore structure changes in water-saturated sandstone during freezing and thawing by NMR
Jiuhui Cheng, Linlin Wang

- 23 -

Parallel 4-3: TC215 Special Session
Aug.24 (Sat), 10:40 - 12:00, Room 133 & 134 (3F, Bldg.1)
Chair: Prof. A. (Malek) BOUAZZA
v07.049
Understanding water migration behavior of unsaturated bentonites for HLW-disposal project
Hideo Komine

v07.050
Experimental study of the effect on one-dimension erosion of compacted bentonite
Li Xiao-yue

v07.051
Gas breakthrough tests on saturated GMZ01 bentonite using RCP technique with consideration of dry density
effectLin-Yong Cui, Wei-Min Ye, Qiong Wang, Yong-Gui Chen, Bao Chen

v07.052
Simulation of swelling pressure evolution during infiltration in a bentonite block-pellet laboratory scale test
Ayman A. Abed, Wojciech T. Sołowski

EA28
Effects of repeated drainage and imbibition on the contamination behavior of a LNAPL and on its S-p relation
Giancarlo Flores, Yutaro Matsuda, Yoshiyuki Yamanaka, Atsushi Takai, Takeshi Katsumi

v07.053
Geomechanical studies in urban solid waste
Mahler, C. F., Ramos, V. L. F. S., Mainier, F. B.

- 24 -

Parallel 5-1: <A-2> Water-retention and hydraulic behavior (2)Aug.24 (Sat), 13:50 - 14:50, Plenary session room (4F, Bldg.1)
Chair: Prof. Chaosheng TANG
EA29
Water retention curve of loess under cyclic wetting-drying
Q.Y. Mu, Y.J. Dang, C.Y. Qian, H.J. Liao

v07.054
Particle size effects on the water retention properties of colluvial sediments
Rodrigo Osses, Jubert A. Pineda, Carlos Ovalle, Sandra Linero, Stephen Fityus

v07.055
Comparison of air entry values from soil water retention and volumetric shrinkage characteristic curves
K. Tehrani, Y. Zhang, A. Scheuermann, D.J. Williams

EA30
Dependency of Poisson’s ratio on water content for unsaturated soils
Y. Dong

Parallel 5-2: <B-1> Advanced and new testing equipment (2)Aug.24 (Sat), 13:50 - 14:50, Room 131 & 132 (3F, Bldg.1)
Chair: Prof. Maosong HUANG
v07.056
Large scale model test on a single pile in expansive soil upon infiltration
Yunlong Liu, Sai K. Vanapalli

v07.057
Incorporating suction in to the interpretation of plate load tests on unsaturated soils
Yi Tang, Thanh Vo, Hossein A. Taiebat, Adrian R. Russell

EA31
Resistivity test technology of triaxial soil sample based on vdP method
Feng Huai-ping, Ma De-liang, Wu Zhong-xue, Tian Li-da, Liu Meng-yao

EA32
A photogrammetric method for 3D displacement measurement of geogrids during the tensile test
Xiaolong Xia, Xiong Zhang, Zhaozheng Yin

Parallel 5-3: <E-1> Geo-environment (1)Aug.24 (Sat), 13:50 - 14:50, Room 133 & 134 (3F, Bldg.1)
Chair: Dr. Kazunori FUJISAWA
EA33
The Salt Expansion of an unsaturated silty clay
Lihong Chen, Jiankun Liu, Xu Li

EA34
Thermal and saline effect on mineral-water interactions in compacted clays
Huihui Tian, Changfu Wei

EA35
Experimental study on the microstructure evolution of gas hydrate-bearing sedimentPeng Wu, Yongchen Song, Weiguo Liu, Yanghui Li

v07.058
Variance-based determination of dominant model parameters for sand migration in homogenous gas
hydrate-bearing reservoir
Shun Uchida, Yongkoo Seol

- 25 -

Parallel 6-1: <A-2> Water-retention and hydraulic behavior (3)Aug.24 (Sat), 15:00 - 16:20, Plenary session room (4F, Bldg.1)
Chair: Dr. Tomohiro MORI
v07.059
Rapid concurrent measurement of the soil water characteristics curve and the hydraulic conductivity function
utilizing the continuous pressurization method
Adel M. Alowaisy, Noriyuki Yasufuku, Ryohei Ishikura, Masanori. Hatakeyama, Shuu. Kyono

v07.060
Effect of grain-size distribution on hydraulic anisotropy of unsaturated soils
H. Rahardjo, A. Satyanaga

v07.061
The role of pore-size distribution function on the estimation of engineering properties of unsaturated soil
Q. Zhai, H. Rahardjo, A. Satyanaga, GL Dai, XL Zhao

v07.062
Relative hydraulic conductivity inferred from pore size distribution of unsaturated soils
Y. F. Xu

v07.063
Hydraulic conductivity functions of quasi-saturated fine-grained soils
K. V. Bicalho, D. Znidarcic, H-Y. Ko

v07.064
Permeability of saturated and unsaturated iron ore fines
H. Wang, J. Koseki, T. Nishimura

Parallel 6-2: <C-1> Constitutive modelling
Aug.24 (Sat), 15:00 - 16:20, Room 131 & 132 (3F, Bldg.1)
Chair: Prof. Huaiping FENG
EA36
Bounding surface model for unsaturated soil coupling hydraulic hysteresis and mechanical loading
Ran Yuan, Yi He, Nian Hu

EA37
Modelling of unsaturated decomposed granite subjected to finite deformation
X. Xiong, Y.L. Xiong, T. Tsunemoto, S. Okino, X.Y. Qiu, Y. Kurimoto, F. Zhang

v07.065
Constitutive modelling hydro-mechanical behavior of unsaturated loess with a loss of structure
Qiuyu Wang, Jiangu Qian, Shiyuan Li

EA38
A constitutive model of unsaturated soils with considering the effect of intergranular physicochemical forces
T.T. Ma, C.F. Wei, C.Q. Yao

EA39
An anisotropic critical state constitutive model for turbidite hydrate-bearing sediments
M.Zhou, K.Soga, K.Yamamoto, H.Huang

EA40
Effect of occluded gas on the constitutive modeling of unsaturated soils
Yan Liu, Li Zhang- 26 -

Parallel 6-3: <E-1> Geo-environment (2)Aug.24 (Sat), 15:00 - 16:20, Room 133 & 134 (3F, Bldg.1)
Chair: Dr. Giancarlo FLORES
EA41
Gas permeability of landfill soil cover modified by biochar
Abraham C.F. Chiu, H.X. Guo

EA42Distinct stress-dilatancy behaviour of fine-grained sediment containing large bio-gas bubbles
Jianfeng Zhang, Yi Hong, Lizhong Wang, Zhuanzhuan Zhang

v07.066
Investigation into mechanical behaviour of loess-wheat straw mixtures
Wen-Chieh Cheng, Xin Jin, Arul Arulrajah, Annan Zhou

v07.067
Determination of resistance parameters of contaminated tropical soils in the state of Rio de Janeiro
Ramos, V. L. F. S., Mahler, C. F., Mainier, F. B., Januzzi, G. M. F.

v07.068
Study of the gravimetric characterisation and heating value of urban solid waste
Mahler, C. F., Ramos, V. L. F. S., Mainier, F. B.

EA43
Time-dependent performance of new hydroxyapatite-based binder stabilized contaminated soil: preliminary
field test site assessment
Yan-Jun Du, Ya-Song Feng, Wei-Yi Xia , Shi-Ji Zhou, Zhi-Bin Liu- 27 -

Parallel 7-1: <A-2> Water-retention and hydraulic behavior (4)Aug.24 (Sat), 16:40 - 18:00, Plenary session room (4F, Bldg.1)
Chair: Prof. Guoqing CAI
v07.069
Water retention characteristics of granular and powder bentonites
W.Y. Tong, M. Wijaya, E.C. Leongv07.070
Influence of the organic matter content on the soil water retention characteristics of a reconstituted kaolinitic
clay
Carlos R. Reina-Leal, Cesar S. Ramírez, Julio E. Colmenares

v07.071
Some laboratory scale tests on an australian coal tailings sample
Sihe Liao, Partha Narayan Mishra, Alexander Scheuermann

EA44
Adsorbed water density in unsaturated clays
Y. Dong

EA45
Micro- and macro-scopic investigations on wheat-induced change of soil water retention curve of a compacted
loam
R. Chen, J. W. Huang, Y. Xu, Z. K. Chen, J. Liu

EA46
Soil-water retention behavior and microstructure evolution of red clay in full suction range
Guoqing Cai, Annan Zhou, Yi Liu, Chengang Zhao

Parallel 7-2: <C-2> Numerical modelling and analysis (1)Aug.24 (Sat), 16:40 - 18:00, Room 131 & 132 (3F, Bldg.1)
Chair: Dr. Sayuri KIMOTO
v07.072
Nonlinear analysis of unsaturated soils using a meshfree method
Omid Ghaffaripour, Golnaz A. Esgandani, Arman Khoshghalb

EA47
Simple model for predicting the volumetric compression of unsaturated compacted clays
Zhong Han, Wei-lie Zou, Xie-qun Wang

v07.073
A new explicit analytical solution to axisymmetric consolidation of vertical drain in unsaturated soils
Aifang Qin, Tianyi Li, De’an Sun

EA48
Semi-analytical solutions of two-dimensional plane strain consolidation in unsaturated soils considering thesand cushion
Lei Wang, Yongfu Xu, Xiaohe Xia, De’an Sun

v07.074
Modeling of the maximum and minimum void ratios for binary-sized granular materials
W. M. Ye, Z. R. Liu, Y. J. Cui, Z. Zhang, Q. Wang

EA49
A Mathematical Model for Tortuosity of Soil with Considering Particles Arrangement
Han Yan, Jidong Teng, Sheng Zhang, Daichao Sheng- 28 -

Parallel 7-3: <D-2> Hazards
Aug.24 (Sat), 16:40 - 18:00, Room 133 & 134 (3F, Bldg.1)
Chair: Prof. Takeshi KODAKA
v07.075
Comparison of the bearing capacity of an unsaturated soil obtained from the experiments, a semi-empiricalmodel, and numerical simulations
Won Taek Oh, Sai K. Vanapalli

EA50
Analysis of negative skin friction resistance characteristic influence parameter of pile foundation underflooding condition
Ye Shuai-hua

v07.076
Analysis of soil subsidence due to change in groundwater level in unsaturated soils
S. M. Reza Imam, Reza Mohammadi, Danial Ghafarian

v07.077
Erosion resistance test of soil cement application for surface erosion protection
Sokline Pheng, Kinuko Hibi, Toshikazu Hori, Yuji Kohgo

v07.078
Conditions of the cavity formation and sinkholes in the practical ground
Mari Sato, Yoshinori Uno, Ryota Ito

v07.079
Field measurement about water content in embankment covered by slope protection work
T. Matsumaru, T. Sato- 29 -

Parallel Session
Day 3 – August 25 Sunday
Parallel 8-1: <A-5> Cyclic/dynamic behavior
Aug.25 (Sun), 10:40 - 12:00, Plenary session room (4F, Bldg.1)
Chair: Dr. Toshiyasu UNNO
v07.080
Numerical simulation of undrained cyclic behavior for desaturated silica sands
Kengo Kato, Koichi Nagao, Naoaki Suemasa

v07.081
Drained shear behavior of an unsaturated soil during cyclic triaxial loadings
Tun Tun Win, Tomotaka Sato, Yuji Kohgo

v07.082
Response of shallow foundation under coupled cyclic loading for unsaturated sand at large number of cycles
Binod K., Frank W.

v07.083
Dynamic centrifuge model tests on embankment with different upstream conditions
Gautham Adapa, Yuki Takada, Kyohei Ueda, Ryosuke Uzuoka

Parallel 8-2: <C-2> Numerical modelling and analysis (2)Aug.25 (Sun), 10:40 - 12:00, Room 131 & 132 (3F, Bldg.1)
Chair: Dr. Kentaro NAKAI
v07.084
A fully coupled flow-deformation model for cyclic elasto-plastic analysis of multiphase porous media
B. Shahbodagh, G.A. Esgandani, N. Khalili

v07.085
Unsaturated behavior of an earthfill dam during coupled initial impoundment and a prolonged rainfall
Vilayvong K., Kazunori Fujisawa, Akira Murakami

v07.086
Rainfall-induced failure on unsaturated fill and highly weathered schist slopes
Phichet Morya, Supavat Kongpanickul, Kuo Chieh Chao, Rustam Ishenaliev

v07.087
Numerical analysis on the stability of highway embankment reinforced with spiral bladed drain pipe
reinforcements
Kiyonobu Kasama, Yasutaka Ito, Zentaro Furukawa, Tomohiro Hamasaki, Kenji Matsuka

v07.088
Influences of rainfall infiltration and hysteresis SWCC of unsaturated soil on settlement of shallow
foundations
Sangseom Jeong, Yongmin Kim, Hyundo Park

EA51
Large deformation analysis of soil slope with anti-slide piles base on a three dimensional and parallelizedsoil-structure-coupled SPH model
Weijie Zhang, Zhanbin Wang

- 30 -

Parallel 8-3: <E-2> Frozen soil
Aug.25 (Sun), 10:40 - 12:00, Room 133 & 134 (3F, Bldg.1)
Chair: Prof. Sheng ZHANG
v07.089
Testing method for resilient properties of unsaturated unbound granular materials subjected to freeze-thaw
actionTianshu Lin, Tatsuya Ishikawa, Tetsuya Tokoro

EA52
The frozen behavior of an unsaturated silty clay
Xu Li, Jiankun Liu, Zhenya Liu

EA53
Effect of confining pressure path on strength and deformation of frozen silty sandShujuan Zhang, Zhizhong Sun, Zhi Wen

v07.090
Measurement of unfrozen water in unsaturated soil with pulse NMR
T.Tokoro, T. Ishikawa

EA54
An interpretation of soil freezing characteristic curve of unsaturated freezing soils
Jidong Teng, Yu Zhong, Sheng Zhang, Daichao Sheng

EA55
Thaw subsidence properties of artificial frozen ground and prevention of differential foundation settlement
Yao Zhishu, Song Haiqing, Cai Haibing, Wang Xiaojian- 31 -

Parallel 9-2: <C-2> Numerical modelling and analysis (3)Aug.25 (Sun), 13:00 - 14:20, Room 131 & 132 (3F, Bldg.1)
Chair: Dr. Mamoru KIKUMOTO
v07.091
A fully coupled flow-deformation model for time-dependent analysis of unsaturated soils
Thi Ngoc Mac, Babak Shahbodagh, Nasser Khalili

EA56
Soil-water-air coupled elasto-plastic finite deformation simulation of unsaturated silt triaxial test using void
ratio-dependent soil water retention model
Takahiro Yoshikawa, Toshihiro Noda

EA57
Discrete element modeling for shear behaviour of a compacted silty soil at low stress states
Hyunbin Kim, Hyunsu Park, Seong-Wan Park

EA58
Numerical simulation on the hydro-mechanical response of high-speed railway embankment under rainfall
based on a unified constitutive model for unsaturated soils
Yi Xie, Lulu Zhang, Yonglin Xiong, Guanlin Ye

EA59
An analytical study on expansion of liquefaction damage during aftershock induced by groundwater-level risedue to main shock
Toshihiro Noda, Takahiro Yoshikawa

v07.092
Mechanism of dissipation of excess flow pressures in unsaturated granular soils subjected to seismic
excitations
Javad Ghorbani, David Airey

Parallel 9-3: <A-1> Microstructure (1)Aug.25 (Sun), 13:00 - 14:20, Room 133 & 134 (3F, Bldg.1)
Chair: Dr. Kazunari SAKO
EA60
A revised pore morphology method for modeling the experimental observations of air-water distribution in
porous media
Xin Liu, Annan Zhou, Jie Li, Shijin Feng

v07.093
Study on calculation method of pore size distribution formed between soil particles under the closest packing
Tomohiro Mori, Makoto Akiyama, Toru Tsuchikura

v07.094
Investigations on microstructure characteristics of porous pavement based on X-ray CT scanning
Tom Törzs, Jürgen Grabe, Guoyang Lu, Markus Oeser

v07.095
Microscopic investigation of the hydro-mechanical behavior of unsaturated granular media with X-ray CT
Marius Milatz, Jürgen Grabe

v07.096
Distribution changes of grain contacts and menisci in shear band during triaxial compression test forunsaturated sandRyunosuke Kido, Yosuke Higo

- 32 -

Parallel 10-2: <C-2> Numerical modelling and analysis (4)Aug.25 (Sun), 16:20 - 17:40, Room 131 & 132 (3F, Bldg.1)
Chair: Dr. Yosuke HIGO
v07.097
Numerical modeling the uplift bearing capacity of transmission line tower foundation on expansive soil
Xilin Lü, Kunye Zhou, Maosong Huang, Zheng Su

v07.098
An analytical study on the boundary size effect of calibration chamber studies
Y. Cheng, H.W. Yang, D.A. Sun

v07.099
Long- and short-term pore water pressure variations in sandy river dike interpreted with 1- and 2-phaseseepage flow analysis
Sho Nishiie, Satoshi Nishimura, Nobutaka Yamazoev07.100
Numerical simulation of seepage failure by upward flow considering internal erosion
S. Kimoto, T. Akaki, H. Kodama

EA61
A coupled thermal-hydraulic-mechanical model for frost heave
Jianhua Yin, Xiong Zhang

v07.101
Numerical analysis of in-situ water content and temperature variations due to effects of grass
Binh T. Nguyen, Tatsuya Ishikawa, Takumi Murakami

Parallel 10-3: <A-1> Microstructure (2)Aug.25 (Sun), 16:20 - 17:40, Room 133 & 134 (3F, Bldg.1)
Chair: Dr. Shoji KATO
v07.102
Osmotic effects on the microstructure of Ashfield shale
Ke Ou, Jubert A. Pineda, Xianfeng Liu, Daichao Sheng, Antonio Gens

EA62
Two-dimensional capillary rise panel of granular media
Shaokai. Nie, Bate, Bate, Yunmin, Chen

v07.103
Molecular dynamics simulation of water molecules absorption by different cations based Montmorillonite
Honghua Zhao, Cong Liu, Shuqi Jiang, Yuanyuan Ge

v07.104
Influence of pore water salinity on the compressibility of Maryland clay
Shengyang Yuan, Xianfeng Liu, Olivier Buzzi

v07.105
Macroscopic and microscopic study of unsaturated shear strength behaviour of type-F fly ash
Naman Kantesaria, Kanika Gupta, Ajanta Sachan

EA63
Aggregate size effect on the mineralogical composition and microstructure of lime-treated soil
Yejiao Wang, Myriam Duc, Yujun Cui, Anh Minh Tang, Nadia Benahmed- 33 -

Abstract of Keynote Speech- 34 -

Keynote Lecture 1, Aug. 23rd (Fri), 09:10 ~ 09:50“Field techniques for measuring soil hydraulic properties
in unsaturated soils”
Professor, Yuji Takeshita
Okayama University, Japan

ABSTRACT:

It is well established that filed or in-situ measurements of the soil hydraulic properties are essential topractical and accurate prediction of water movement in unsaturated soils such as natural slope, embankment,
landfill and agricultural field. The soil hydraulic properties consist of the saturated hydraulic conductivity,
the unsaturated hydraulic conductivity and the soil water characteristic curve defined as a relationshipbetween water content and matric potential (the suction of a soil).
The hydraulic conductivity of unsaturated soils should be measured in the field. Because air bubbles areusually entrapped in porous media when they are saturated by infiltrating water, the saturated hydraulicconductivity measured in unsaturated soil is lower than the truly saturated hydraulic conductivity measured
by laboratory experiments and is often referred to as a field-saturated hydraulic conductivity. Field methods
for determining the field-saturated hydraulic conductivity of unsaturated soils include constant head
infiltration and/or gravity drainage events for near-surface application. For measuring the soil water
characteristic curves, it is often difficult to interpret in-situ measurements unless carefully controlled
boundary conditions are applied. As a results, the soil water characteristic curves are most generally measured
in the laboratory experiments using well-controlled initial and boundary conditions. Whereas laboratory
experiments have the advantage of being easy, quick and precise, a major disadvantage is that they lead tosoil properties that are often non-representative of field conditions.
Since analyses of the soil hydraulic functions are ultimately directed toward field-scale processes,
determination of in-situ properties is more relevant than data obtained from laboratory analyses. This keynote
speech will review the current status of field experimental techniques of measuring the soil hydraulicproperties in the near surface of unsaturated sandy soils and illustrate their utility for determining key
parameters affecting seepage flow in the unsaturated soils. A few areas in need of further investigation will
be outlined.

- 35 -

Keynote Lecture 2, Aug. 23rd (Fri), 09:50 ~ 10:30“Soil-atmosphere interaction in embankments”
Professor, Yu-Jun Cui
Ecole des Ponts ParisTech, France
Dr. Yu-Jun Cui was Panel Member of Géotechnique for three years. He is now
Associate Editor of Canadian Geotechnical Journal, Vice Chief Editor of Journalof Rock Mechanics and Geotechnical Engineering, Panel Member of
Géotechnique Letters. He is also editorial board members of several other
Journals. He was selected by TC106 and delivered the first European
Distinguished lecture on unsaturated soils in 2016.

ABSTRACT:The stability of earth constructions depends strongly on the climatic conditions. In dry seasons, excessive
water evaporation can lead to surface cracking, modifying the hydro-mechanical behaviour of soils and thus
compromising the constructions’ stability. In wet seasons, significant water infiltration leads to reduction ofsuction and thus decrease of the mechanical performance of constructions. The drying/wetting cycles that theconstructions undergo constantly can only come to enhance the detrimental effects. These points have widely
investigated in the laboratory, but rarely addressed in the field. In this lecture, two cases studies are firstly
presented, one is an experimental embankment with two compacted silty soils and another is an experimental
embankment with lime/cement treated silty/clayey soils. Emphasis is put on the atmospheric conditions
changes and the subsequent changes in suction and water content in the embankments. A numerical tool isalso developed, allowing the soil hydro-mechanical behaviour to be analysed through consideration of
atmosphere interaction. This numerical tool is based on an appropriate water evaporation model on one hand,and on a coupled thermal and hydraulic fluids flows on other hand. It is successfully applied to the analysesof the hydro-mechanical behaviour of two embankments in terms of changes of suction and water content,
showing that it is possible to analyse the earth constructions’ behaviour based on the recent knowledge
developed in unsaturated soil mechanics, provided that appropriate water evaporation model is adopted.

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Keynote Lecture 3, Aug. 23rd (Fri), 13:10 ~ 13:50“Effect of stress and suction on resilient modulus of compacted
unbound materials”
Professor, Seong-Wan Park
Dankook University, Korea
Ø

Professor, Dankook University (2003–Present)ØMember of ISSMGE (TC106) and core member (ISSMGE TC202)

Ø

Editor-in-Chief, Journal of Korean Geotechnical Society (2015-2017)ØSenior Editor, KSCE Journal of Civil Engineering(2016-Present)

Ø Senior Researcher, Korea Institute of Construction Technology (20002003)
ABSTRACT:Over the last several decades there has been a significant shift from the use of empirical approaches towards
the use of mechanistic models and unsaturated soil mechanics to characterize and predict the behavior oftransportation infrastructure and geomaterials. Particularly, resilient modulus is an important mechanicalparameter for the study of the behavior of unbound materials under cyclic and traffic loadings. Some studies
have indicated that soil suction has an effect on resilient modulus of unbound materials and that there is a
non-linear response of this feature for geomaterials during the loading process. Nevertheless, an assessmentthat couples the dependency of resilient modulus on stress and suction is still lacking. This study addresses
this through a detailed analysis of resilient modulus under moisture conditions using suction stress concept
on unsaturated soils. Results show a non-linear variation of resilient modulus with stress and that suction
stress has a significant influence on it. The model proposed to couple the effect of moisture and stress onresilient modulus presents better prediction performance of compacted unbound materials.

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Keynote Lecture 4, Aug. 23rd (Fri), 13:50 ~ 14:30“Environmental degradation of clayey rocks”
Senior Lecturer, Jubert Abdres Pineda
The University of Newcastle, Australia
Dr. Jubert Pineda received a Bachelor Degree in Civil Engineering from theSanto Tomas University (Bogotá, Colombia). He obtained a Master Degree inGeotechnical Engineering from the National University of Colombia and a PhD
Degree in Geotechnical Engineering from the Technical University of Catalonia(UPC, Barcelona) in 2012. At present he works as Senior Lecturer at the Priority
Research Centre for Geotechnical Science and Engineering (PR-CGSE) in the
University of Newcastle Australia.
Dr. Jubert Pineda has been involved in several research and consulting projects
associated with unsaturated soils, stability of dams founded on clayey rocks aswell as high-quality sampling and testing of soft soils. His current researchinterests include mechanics of soft soils, unsaturated soils, mechanics of hardsoils-soft rocks and more recently Geo-Engineering problems related to Energy
and Sustainability.
ABSTRACT:

Clayey rocks are common in many countries, and are frequently present in civil engineering projects. A
recurrent observation in these materials is their transitional nature, which emerges mainly when they are
excavated and exposed to weathering processes as those caused by cyclic variations in relative humidity (RH)or suction. Marls, shales, claystones, mudstones, siltstones and very stiff clays are examples of materials that
undergo these changes. Despite intrinsic geological differences, clayey rocks show two similar
characteristics: (i) a behaviour intermediate between rock and soil; and (ii) a high ‘degradation’ potential
ability to change their mechanical properties, transforming the clayey rock into a soil. This transition isespecially relevant when the rock is exposed to unloading and environmental effects, which may leads tostability problems or unexpected deformation of geotechnical infrastructure.
Rock degradation has commonly been related to increase in water content due to cyclic variations inrelative humidity. Such cyclic behaviour is accompanied by irreversible volume changes, reduction in rockstrength and rock stiffness as well as increase in rock permeability. Tracking of the variations in mechanicalproperties is fundamental for proper understanding of the rock degradation phenomena.
In this presentation, the mechanisms leading to the degradation of clayey rocks when exposed toenvironmental effects are evaluated. The main aspects controlling the degradation of clayey rocks are studied
in this presentation: (i) the number of applied RH cycles, N, (ii) their amplitude, RH, (iii) the influence ofthe stress level (p-ua), (iv) the effect of the fluid used to induce rock saturation (liquid water or vapour) and(v) the chemistry of the pore fluid. Particular emphasis is given to the consequences of the relative humidity
cycling on rock microstructure. The development and implementation of non-conventional experimental
techniques for inducing and tracking rock degradation, at micro and ‘macro’ scales, is described. An
experimentally-based framework of behaviour is presented which may be used in practice for the evaluationof the degradation potential of clayey rocks.

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Second Asia-Pacific Distinguished Lecture on Unsaturated Soils
Aug. 24th (Sat), 08:10 ~ 08:50“Unusual geotechnical problems in high-speed railway embankments incold climates”
Professor: Daichao Sheng
University of Technology Sydney, Australia
Professor Daichao Sheng is a Distinguished Professor and Head of Schoolof Civil and Environmental Engineering at University of Technology Sydney(UTS) in Australia. He also holds a conjoint Distinguished Professorshipat the National Engineering Laboratory for High-Speed Railway
Construction, Central South University in China.
Prof Sheng received a BSc degree on Engineering Geology andHydrogeology from Lanzhou University in China, an Engineering Licentiate
degree and a Doctor of Engineering degree from Lulea University in Sweden.
Prof Sheng’s research interests include computational geomechanics,
unsaturated soils, cold region geotechnics and environmental geotechnics.
He has published widely in these areas. He has a total citation of ~3500 andan H-index of 34, according to Web of Science. He was awarded the RM
Quigley Award by the Canadian Geotechnical Society, the John Booker
Medal by the International Association of Computer Methods and Advancesin Geomechanics (IACMAG), the EH Davis Lecturer by the Australian
Geomechanics Society. He is currently one of the 2 Editors for the
Canadian Geotechnical Journal and serves in the editorial boards ofComputers and Geotechnics, Acta Geotechnica.
Prof Sheng has held a number of senior positions. He was the CoDirector of the Priority Research Centre for Geotechnical Science andEngineering at the University of Newcastle. He also serves as a TechnicalExecutive in Geotechnics of WSP Australia Partial Limited, a leading
consulting companies in the world.

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Keynote Lecture 5, Aug. 24th (Sat), 09:00 ~ 09:40“Volume change behavior of highly compacted GMZ bentonite underchemo-hydro-mechanical conditions”
Professor: Weimin Ye
Tongji University, China
Dr. Weimin YE is a Professor of geological/geoenvironmental engineering in
School of Civil Engineering at Tongji University in Shanghai. He earned his PhD
in Structure Engineering from Tongji University, with specialization in
excavation and geo-environmental protection. Dr. YE’s area of expertise isgeological/geoenvironmental engineering with particular emphasis in
Unsaturated Soil Engineering. He is conducting research in compacted bentonite
for using as buffer materials in deep geological repository for disposal of highlevel radioactive waste in China. In this direction, he is exploring the engineering
properties of GMZ bentonite under Chemo-thermo-hydro-mechanical coupling
conditions. He has more than 200 publications including more than 80
international journal papers and got 5 awards from the local government forcontributions to research.
ABSTRACT:Due to its low hydraulic conductivity, high swelling capacity and good adsorption properties, theGaomiaozi (GMZ) bentonite has been selected as potential buffer/backfill materials for construction of
artificial barriers in the deep geological repository for disposal of high-level nuclear waste (HLW) in China.
During the long-term operation of a repository, the compacted bentonite will inevitably experience wetting
or drying processes with hydration or dehydration of groundwater with different concentrations. Furthermore,these processes will take place in the repository with a limited space and certain geo-stresses generated by
the upper geological formations.
In this work, compacted GMZ bentonite with an initial dry density of 1.70 g/cm3 was hydrated with distilledwater and NaCl solutions. For a given suction, the measured void ratio of specimen saturated with distilledwater is slightly larger than those of the specimens saturated with salt solutions after the drying equilibrium
is reached. The degree of saturation of compacted GMZ bentonite specimen increases as the salt concentration
increases under the same total suction. A modified soil water retention curve (SWRC) equation was proposedto account for the effect of void ratio and salt solutions on the drying behavior of the specimens. Verifications
reveal that the proposed equation can satisfactorily describe the SWRCs of compacted GMZ bentonite
saturated with different concentrations of salt solutions. In the meantime, volume change behavior of highly
compacted GMZ bentonite was studied under coupling chemo-hydro-mechanical conditions. Using amodified oedometer, cyclic wetting and drying tests were conducted on compacted GMZ bentonite with
infiltration of NaCl solutions under different constant vertical stresses. Specimens were infiltrated withdifferent concentrations of NaCl solutions during the wetting tests and a suction-control method was used in
the drying tests. Results show that the swelling strain on wetting and the shrinkage strain on drying decrease
with the increase of the vertical stresses or the concentration of NaCl solutions. Plastic deformations mainly
occurred in the first wetting and drying cycle and decreased with the increase of the vertical stresses.
However, the accumulated plastic deformation increased with increasing concentration of NaCl solutions,which could be attributed to the effects of osmotic consolidation. Based on the test results, a modified
Barcelona Expansive Model (BExM) model with consideration of the influences of NaCl solutions with- 40 -

different concentrations was proposed in this work. The micro-/macro- coupling equations fD (suction
reduction) and fI (suction increase) were improved for the specimens saturated with different concentrationsof NaCl solutions. Simulations show that the modified BExM model can be used satisfactorily to describe
the wetting/drying behavior of compacted GMZ bentonite specimens with consideration of the influences of
NaCl solutions with different concentrations.

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Keynote Lecture 6, Aug. 24th (Sat), 09:40 ~ 10:20“Soil-Water Characteristic Curves– Determination, Estimation and Application”
Associate Professor, Eng Choon Leong
Nanyang Technological University, Singapore
Dr. Leong Eng Choon is currently an Associate Professor at Nanyang
Technological University, Singapore. He has over 30 years of teachingexperience in geotechnical engineering and is an active researcher in unsaturated
soils and soil dynamics. He has published more than 320 journal and conference
papers. He is currently an editorial board member of several journals and is anactive reviewer for many journals. He has won several awards, notably the
Excellence in Reviewing for the Geomechanics for Energy and the Environment
journal in 2018, the Koh Boon Hwee Mentor award in 2013, and the ASTM best
paper award in 2006. He is also active in the national standardization
programmes in SPRING, Singapore. He is the lead author and co-author of thebooks entitled “Guide to Research Projects for Engineering Students - Planning,
Writing, Presenting” and “Mechanics of Residual Soils, 2nd Edition”,
respectively.
ABSTRACT:The soil-water characteristic curve (SWCC) or water retention curve is a relationship between watercontent in a soil and suction. The SWCC was first plotted by Edgar Buckingham, a soil physicist, in 1907 forsix soils ranging in texture from sand to clay. It was adopted for use in unsaturated soil mechanics by thegeotechnical engineering community. The SWCC is now almost treated as the index property of unsaturated
soils. It has been used as a proxy for permeability and shear strength of unsaturated soil. Most soils have asigmoidal SWCC, otherwise known as a unimodal SWCC as opposed to a bimodal SWCC which has beenfound for some soils. Although determining the SWCC is easier than determining permeability or shear
strength for unsaturated soil, the test is still time-consuming and it is not easy to determine the entire SWCC.
Incomplete or insufficient SWCC data may lead to an incorrect SWCC and hence inaccurate determinationof permeability and shear strength. Progress has been made to expedite the experimental determination of
SWCC as well as estimating the SWCC from basic soil properties using pedotransfer functions. In addition,
SWCC has been represented using volumetric water content, gravimetric water content or degree ofsaturation. Different representations may have dire consequences on its application. Determining the SWCC
using volumetric water content or degree of saturation presents challenges in estimating the instantaneousvolume during the experiment. In this paper, the current state-of-the-art in determining, representing andestimating SWCC and its applications are described and critically examined.

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Keynote Lecture 7, Aug. 24th (Sat), 13:00 ~ 13:40“A Photogrammetry-Based Method to Measure the Total and Localized
Volume Changes of Unsaturated Soil Specimens during Triaxial Testing”
Associate Professor: Xiong Zhang
Missouri University, USA
Dr. Xiong Zhang is an associate professor in the Department of Civil,
Architectural and Environmental Engineering at the Missouri University of
Science and Technology (Missouri S&T). His research focuses on developmentof advanced laboratory techniques to rapidly characterize geomaterials,
constitutive modeling coupled hydro-mechanical behavior of unsaturated soils,
numerical modeling of climate-soil-structure interaction, slope stability analysis,
soil stabilization and ground improvement, and frozen ground engineering. He
was one of the two speakers of ASCE Geo-Institute (GI) Unsaturated Soils
Committee Webinar on “Introduction to Constitutive Modeling of Unsaturated
Soils.”
Dr. Zhang is currently serving as an Editorial Board Member of Canadian
Geotechnical Journal. He also serves as a vice chair of ASCE GI Shallow
Foundation Committee and committee member of several nationwide technicalcommittees such as ASCE GI Committee on Design of Residential Structures on
Expansive Soil Standards, ASCE GI Pavement Committee, TRB AFP60
Committee on Engineering Behavior of Unsaturated Soils, and TRB AFS20
Committee on Soil and Rock Instrumentation.
ABSTRACT:

Triaxial tests have been widely used to evaluate the soil behavior. In the past few decades, many methods
have been developed to measure the volume changes of unsaturated soil specimens during triaxial testing.
Literature review indicates that until now measuring the volume changes of unsaturated soil specimens during
triaxial testing remains a major challenge for researchers.
In this study, a noncontact method is developed to measure the total and local volume changes of
unsaturated soil specimens using a conventional triaxial test apparatus for saturated soils. The method is
simple and cost-effective, requiring only a commercially available digital camera to take images of an
unsaturated soil specimen during triaxial testing from which accurate 3D model of the soil specimen isreconstructed. In this proposed method, the photogrammetric technique is utilized to determine theorientations of the camera where the images are taken to an accuracy to 3-5 microns, multiple optical ray
tracings are employed to correct the refraction at the air-acrylic cell and acrylic cell-water interfaces, and aleast–square optimization technique is applied to estimate the coordinates of any point on the specimen
surface. Validation tests indicated that the accuracy for the point measurements is less than 76 microns in thewater and less than 0.25% for total volume measurements. Methods are also developed to calculate the total
volume and localized strains based upon the 3D discrete measurement points on the specimen surface.
This method was awarded the “2016 International Innovation Award in Unsaturated Soil Mechanics” by
TC106 within the International Society for Soil Mechanics and Geotechnical Engineering.

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Keynote Lecture 8, Aug. 25th (Sun), 09:00 ~ 09:40“Unsaturated Soil Mechanics for Disaster Prevention and Maintenanceof Traffic Infrastructure in Snowy Cold Region”
Professor, Tatsuya Ishikawa
Hokkaido University, JapanØ

1987-1989 Graduate School of Engineering, Kyoto University

Ø

1999

Ø

2002-2013 Professor in Hokkaido UniversityØ

2002-213

granted Dr. Eng. from Kyoto University
Secretary of ISSMGE TC 202 (Transportation Geotechnics)

ABSTRACT:In snowy cold regions, the 0 °C isotherm may penetrate deep into soil ground, thereby causing somegeotechnical problems specific to cold regions such as the swelling of pavement surface due to frost heave,
the cracking in asphalt-mixture layer due to freeze-thaw, and the slope failures at cut slope and embankment
in snow-melting period. Such phenomena are thought to accelerate deterioration of traffic infrastructures andlosing of the functions. The primary cause is deemed to be the increase in degree of saturation due to snowmelt
and/or ice lens melting in addition to the change in deformation-strength and water retention-permeability
characteristics of soils resulting from freeze-thawing. Hence, it is indispensable to examine the influence of
rapid increase in water content during thawing periods as well as the freeze-thawing of pore fluid on thehydro-mechanical behaviour of unsaturated soil ground for establishing a precise prediction method of natural
disasters and a rational design method of transportation infrastructures in snowy cold regions.
This keynote lecture reviews and summarizes previous researches related to the unsaturated soil mechanics
for the disaster prevention and maintenance of traffic infrastructures in snowy cold region from the viewpointsof experimental and analytical studies. To this end, this keynote lecture presents two case studies, namely“slope stability problem” and “pavement rutting problem” in thawing periods. In both problems, this keynote
lecture first discusses the mechanical behaviour of the soil slope during freezing and thawing based on the
results of the long-term field measurement of soil slope in Hokkaido and full-scale and small-scale model
tests of soil slopes and pavement subjected to freeze-thaw actions. Next, it discusses the change in the physicalproperties, the water retention-permeability characteristics, and the deformation-strength characteristics ofgeomaterials caused by freeze-thaw actions based on the results of various types of laboratory element tests
under saturated and unsaturated conditions. Last, it discusses the applicability of numerical simulations,which can consider the interactions among thermal analysis, seepage analysis, and deformation analysis, tothe failure mechanism analysis of soil slopes and the deformation analysis of pavement in snowy cold regions
from the viewpoint of the variation in water content due to snow and ice lens melt and the change in material
properties due to freeze-thaw. Finally, this keynote lecture discusses the contributions of unsaturated soil
mechanics to the disaster prevention and maintenance of traffic infrastructures in snowy cold region in termsof the mechanism of the slope failures and pavement rutting, and its influencing factors by comparing thephenomena in temperate regions with those in snowy cold regions.

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Keynote Lecture 9, Aug. 25th (Sun), 09:40 ~ 10:20“Three-phase coupled seismic analyses of unsaturated/saturated
grounds”
Professor, Ryosuke Uzuoka
Kyoto University, Japan
Ø
Ø
Ø
Ø
Ø

2017.4-present
2010.4-2017.3
2004.3-2010.3
2001.8-2004.3
1999.1-2001.8

Ø

1990.4-1998.12

Professor, Kyoto University
Professor, Tokushima University
Associate Professor, Tohoku University
Assistant Professor, Tohoku University
Researcher, Earthquake Disaster Mitigation
Research Center, RIKEN
Research Engineer, Hazama Corporation

ABSTRACT:

Some Asian countries share a similar natural environment and face the same threats from natural disasters
such as earthquake, typhoon, heavy rainfall, flood, and landslide. What makes a bad situation even worst isthat these natural disasters very often did not come alone, which is known as combined disasters. For example,
a heavy rain and an earthquake likely occur sequentially in a relatively short period. A three-phase coupledanalysis will be a promising tool to discuss dynamic behaviors of unsaturated/saturated grounds such as slopesand embankments during combined disasters. The author reviews recent developments on three-phase
coupled seismic analyses. The equations governing the dynamic deformation of unsaturated soil were derived
based on porous media theory and constitutive models. The effect of pore air pressure on cyclic behavior of
unsaturated sandy soil is discussed through the simulations with three-phase and simplified two-phaseanalyses. The validity of three-phase coupled analyses is shown through simulations of seismic behaviors ofslopes and embankments.

- 45 -

‐Notes‐- 46 -

‐Notes‐- 47 -