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New Highway in Heilongjiang Province2000 km in 3 years.

Geological Problems and Engineering Countermeasuresof Beian-Heihe Highway of China
in the Context of Climate Changeьे᷇ъབྷᆖሂ४、ᆖоᐕ〻⹄ウ䲒
Institute of Cold Regions Science and Engineering,2017.11.20

Highway construction plan of Heilongjiang Province (2008-2011)

Background˄Frozen area in NE China ˅•Topography and Geomorphology•Geological structure•Climate and weather•Distribution of frozen soil

Types and characteristics
of geological disasters
˄ Beian-Heihe Highway˅•Landslide•Icing•Foundation settlement

Climate change &degradation of permafrost
˄ study area ˅•Change of Permafrost Southern
Boundary (in NE China )•Distribution characteristics ofpermafrost

1.㛼Ჟ˄ьे߫൏४˅
•ൠᖒоൠ䊼•ൠ䍘ᶴ䙐•≄‫ى‬•߫൏Ⲵ࠶ᐳ

1.Background˄Frozen area in NE China ˅•Topography and Geomorphology•Geological structure•Climate•Distribution of Frozen soil

Other environmental
geological issues
˄ study area ˅1.1ൠᖒоൠ䊼 Topography and Geomorphology

1.2ൠ䍘ᶴ䙐 Geological structure

Mountain altitude (300-1000 meters), 58%.
Platform altitude (250-350 meters), 14%.
Plain altitude (50-200 meters), 28%.

Topographic map in frozen region of NE China.

Geological map in frozen region of NE China.

ьेൠ४བྷൠᶴ䙐࠶४
മ

Geological Structure map in frozen region of NE China.

Geological map along Beian-Heihe Highway in NE China.

1.3 ≄‫ى‬о≄䊑 Climate and weather
WinterSummerhigh pressurehigh pressure

Medium - temperate continental monsoon climate
long winter ,short summer, obvious four seasons.
Spring: warmer, windy and drought.
Summer: controlled by the southeast monsoon , mild and rainy;
Autumn: cooling fast, early
Winter: high pressure (Siberia, Mongolia) long, Cold and dry.
Average air temperature in January in China

1.4 ߫൏Ⲵ࠶ᐳ Distribution of Frozen soil

Average temperature in January
July

Average air temperature in July in China

Current state: PF degradation
Climate warming :Artificial disturbance:2.≄‫ى‬ਈॆоཊᒤ߫൏䘰ॆ˄⹄ウ४˅

2. Climate change &degradation of permafrost•ཊᒤ߫൏ই⭼╄ਈ˄ьे˅•ཊᒤ߫൏࠶ᐳ⢩ᖱ•Change of Permafrost Southern
Boundary (in NE China )•Distribution characteristics ofpermafrost

˄ study area ˅New Highway in Heilongjiang Province2000 km in 3 years.

2.1ཊᒤ߫൏ই⭼╄ਈ Change of PF southern boundary

Average annual temperature changing near study area˄1954-2014˅

2.2ཊᒤ߫൏࠶ᐳ⢩ᖱ0ć isotherm of AT ( close to south boundary of PF) moving northPF distribution characteristics

Kinggan-Baikal Permafrost
 Inverse AT layer in winter Surface vegetation reduce
solar radiation & ST rising.
 Location:
Lower place (valley, shadowslope, wetland) T difference: 1-5ć.
 Normal height band:>700m

Inversion layer of AT :
 Asia High pressure (Mongolia-Siberian) Control by inverse AT layer in winterAsia High pressure (Mongolia-Siberian)

PF distribution using Landsat 7 ETM+ Imagine data,2012

Slope˄with PF˅Elevation 190-200m
Angle: 2-6
Direction: NE,N.

Excavation site (2.1m depth)
Seepage trace (Φ20mm)
Elevation & Direction distribution of PF in the study area (From Landsat data & DEM)߫൏࠶ᐳоൠ㺘ᖒਈ

3.ൠ䍘⚮ᇣ㊫ර৺⢩ᖱ˄े唁儈䙏⋯㓯˅•━එ•⎾⍱ߠ•ൠส⊹䱽

Types and characteristics
of geological disasters
˄ Beian-Heihe Highway˅•Landslide•Icing•Foundation settlement

PF distribution and the surface deformation˄same data source˅

3.1 ━එ Landslides

3.1 ━එ Landslides

Embankment section˖

Excavation section˖

Multiple, irregular shape ,creeping movement,back scarp approach to road bed

icing in winterˈlandslide in Spring.

1999: 17 seg.; Roadbed Landslides
2009: 06 seg.; >2000m3 lanslsides massFoundation settlement ˖%HLɉDQ+HLKH+LJKZD\ %OXHOLQHLVWKHERXQGDU\RIWKHODQGVOLGHVWKHRUDQJHDUHDLVFRUQILHOG $/DQGVOLGHVKHOOVKDSH
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2004: 101m

2010: 145m
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Drilling detection
Survey geological mapabGeophysical prospecting
High density resistivity (HDR)

Bury sensors in drilling hole
Ground-penetrating radar (GPR)
Sample from drilling hole

Monitoring by sensors
Soil temperature
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Pore water pressure

High density resistivity (HDR)L
HDR survey line

Resistivity˄Ω•m˅

Resistivity˄Ω•m˅0-2-4H-H’

Depth (m)-6

GPR survey line

ZK2-8-10BCDEF-10-14-14G-16-18

Resistivity (Ω•m)






0-2-2C-4D-6ZK1

E-8

Depth (m)Depth (m)0F-10-4-6-8









AB
G
H-10-12-12-14-16

AResistivity (Ω•m)

L-L’



-8-12-18

Drill hole

-6-12-16Lʹ



-4

ZK1
Depth (m)GPS point

0-2-14(a)-18-16(b)-18(HDR) : sliding surface – soil resistivity values decreased suddenly.
7KHOD\RXWRIJHRSK\VLFDOVXUYH\OLQHVGround-penetrating radar (GPR)

A’ -C

G-G’(GPR) : sliding surface – radar wave amplitude rise rapidly.

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