Study on Effect of Rainfall on Earth Pressure of Shield Tunnel in Expansive Soil Stratum
Authors
Feng Chao, Zaifeng Yao, Xiaohong Guo
Corresponding Author
Feng Chao
Available Online September 2018.
- 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/).
Cite this article
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 -