Study on Effect of Rainfall on Earth Pressure of Shield Tunnel in Expansive Soil Stratum

DOI

10.2991/iceep-18.2018.157How to use a DOI?

Keywords

expansive soil; earth pressure of shield tunnel; rainfall; strength reduction; additional expansive stress field

Abstract

Strength reduction and expansion deformation of expansive soil would happen due to change of moisture content. Effect of rainfall on earth pressure of shield tunnel in expansive soil stratum is studied by taken reduction of expansive soil strength and additional expansive stress field into consideration. Vertical earth pressure caused by strength reduction decreases with increasing depth, and value change is less than 3 kPa when depth exceeds 20 m. Vertical earth pressure caused by additional expansive stress field is less than 10 kPa and influence range is mainly in the upper part of segment ring. Recommended values of earth pressure caused by rainfall is proposed when depth less than 6 m.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Feng Chao
AU  - Zaifeng Yao
AU  - Xiaohong Guo
PY  - 2018/09
DA  - 2018/09
TI  - Study on Effect of Rainfall on Earth Pressure of Shield Tunnel in Expansive Soil Stratum
BT  - Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)
PB  - Atlantis Press
SP  - 891
EP  - 896
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-18.2018.157
DO  - 10.2991/iceep-18.2018.157
ID  - Chao2018/09
ER  -