京都大学教育研究振興財団助成事業
成 果 報 告 書
平成30年2月28日
公益財団法人京都大学教育研究振興財団会 長 辻
井 昭 雄 様所属部局・研究科

工学研究科都市社会工学

職 名・学 年

博士課程２年氏

Muhammad Shehzad Khalid

名助 成 の 種 類

平成２９年度研 究 集 会 名

国際トンネル会議２０１７World Tunneling Congress 2017

発 表 形 式□ 招 待

発 表 題 目The influence of constitutive models on the mechanical behavior of conventional
shallow overburden tunnel

開 催 場 所ノルウェー、ベルゲン

渡 航 期 間平成 29 年 06 月 10 日

成 果 の 概 要・・

国際研究集会発表助成・Ⅱ期□ 口 頭～・P ポスター ・ □ その他（）

平成 29 年 06 月 15 日

タイトルは「成果の概要／報告者名」として、A４版２０００字程度・和文で作成し、添付して下さい。 「成果の概要」以外に添付する資料 □ 無□ 有()
交付を受けた助成金額

300,000 円

使 用 し た 助 成 金 額

300,000 円

返納すべき助成金額0 円
渡航費 200,000 円

会 計 報 告滞在費 100,000 円
助 成 金 の 使 途 内 訳（今回の助成に対する感想、今後の助成に望むこと等お書き下さい。助成事業の参考にさせていただきます。）

当財団の助成についてI would like to thanks the Kyoto Univeristy Foundation for their kind support tomake this event fasibel for me. Indeed it was a great learning curve and expereince
for me. Once again I am extremely thankful for theri financial support from theKyoto Univeristy Foundation.

Subject: World Tunneling Congress Event2017Background
ITA (International Tunneling and Underground Space Association) and AITES (AssociationAssociation Internationale Des Tunnels et de l´Éspace Souterrain) arrange tunneling congress eventon annual basis. In 2017, AIT and AITES in collaboration with NFF (Norwegian TunnelingSociety) arranged the World Tunneling Congress (WTC) event in Bergen Norway from 9th June to15th June. Bergen is a city on Norway’s southwestern coast. It's surrounded by mountains and fjords,
including Sognefjord, the country’s longest and deepest.

WTC 2017 program
WTC 2017 event comprised of Sir. Muir Wood and keynote lectures, open session and various
technical sessions. The theme for the WTC 2017 event was “Surface challenges-undergroundsolutions”, a total of 760 abstracts were received for the congress, out of which 486 were accepted.
This against resulted in 340 submitted papers, out of which 337 were accepted. The accepted papers
were presented as oral and poster contributions during the WTC in Bergen. The papers werecategorized in following 18 categories.
1. Site investigation, ground characterization
2. Urban tunneling (planning, design and construction)
3. Strategic use of underground space for resilient city growth
4. Utilization of underground for hydropower projects
5. Mechanized excavation
6. Innovation in drill and blast excavation
7. Large caverns (planning, design and construction)
8. Underwater tunnels
9. Tunneling for mining purposes
10. Underground waste storage and disposal
11. Innovation in rock support and water proofing technology
12. Operation, surveillance and maintenance
13. Safety management of complex underground excavations
14. Stability assessment, risk analysis and risk management
15. Seismic design of tunnels and underground excavations
16. Tunnel refurbishment
17. Case histories-lesson learnt
18. Topic not specified
All paper in the proceedings have been reviewed by 2 independent reviewers. The 42 members of
the Scientific Committee and the 50 members of the additional team of expert reviewers wereutilized. We submitted the paper under the category no. 03 (Urban Tunneling) and it was selected
for the poster presentation.

Keynote lectures
In every WTC event there is always a Sir. Muir Wood and Keynote lecture. The speakers who haveachieved excellence in their respective fields are invited. This year Sir. Muir Wood lecture wasgiven by Emeritus Prof. Hakon Stille on topic “Geological uncertainties in tunneling – Risk
Assessment and Quality Assurance. The key note lecture was delivered by Nuh Bilgin on the topic“The factors effecting the performance on three different TBMs in a complex geology in Istanbul”.
The second key note lecture was delivered by the well renowned Emeritus Prof. Nick Barton on thetopic “Rock as a construction material for tunnels”. Apart from this an opens session was conductedon the theme of the WTC 2017 event i.e. “Surface challenges-underground solutions”. Fourdistinctive guests from various countries were invited to share their thoughts and experience during
the complex projects planning and execution. After their brief introduction the session was followedby the interactive session between the audience and the invited guests.

Figure 1. Opening ceremony

Figure 2. Prof. Hakon Stille delivering the Sir. Muir
Wood lecture

Figure 1. Prof. Nick Barton delivering the Keynotelecture

Poster presentation
Our paper with title “The influence of constitutive models on the mechanical behavior of
conventional shallow overburden tunnel” was amongst the selected papers in the category of Urban
Tunneling for the WTC proceedings. The assigned mode of presentation was poster. In this study, acircular tunnel section of 10m diameter with different overburden conditions i.e. 0.5D. 1.0D and
1.5D has been analyzed in loose sandy ground, where D is the diameter of the tunnel. As most of
the studies to date are focused on surface settlement due to the tunneling. But it is important todeeply understand the stress path during the tunneling excavation. The soil was modeled by two
famous and widely used constitutive models i.e. Mohr Coulomb and Modified Cam Clay. The
results were presented in terms of ground reaction curve and stress path during the progressive
relaxation of the ground at the selected points along the tunnel crown and spring line. In the end, theeffect of support installation on stress path was evaluated.

Figure 2. First author during the poster presentation at WTC 2017