Study on Numerical Simulation Analysis of Foundation Pit Excavation Stability on Expansive Soil Slope

DOI

10.2991/978-94-6463-564-5_18How to use a DOI?

Keywords

Expansive soil; slope; foundation pit excavation; rainfall; numerical simulation

Abstract

Expansive soil, also known as “expansive soil”, is a kind of cohesive soil whose volume expands violently after soaking in water and shrinks significantly after losing water. This kind of soil will cause serious harm to buildings. In the excavation of foundation pit on expansive soil slope, because the protective layer on the surface is destroyed, it is easy to form seepage channels and lead to landslides. In this paper, based on the excavation of foundation pit on the expansive soil slope of the Yangtze River to Huaihe River, the temperature field is equivalent to the humidity field, and the influence of foundation pit excavation on expansive soil slope is studied by numerical simulation method. The results show that when the protective structure of foundation pit on the slope is seriously damaged, the horizontal displacement of slope soil can reach more than 10cm under conditions of heavy rainfall, and the soil mass of the slope is deformed greatly, so there is a certain risk of landslide on the slope. The maximum horizontal displacement of the supporting structure of the foundation pit is about 8.9cm, and the supporting structure is deformed greatly, so there is a risk of collapse of the foundation pit. Adding anti-slide piles can improve the slope stability to some extent, but under the condition of long-term rainfall, the improvement range of slope stability by installing additional anti-slide pile gradually decreases.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Xun Wang
AU  - Ligong Yang
AU  - Yuting Zhang
AU  - Zhengyu Duan
AU  - Lu Wang
PY  - 2024
DA  - 2024/10/31
TI  - Study on Numerical Simulation Analysis of Foundation Pit Excavation Stability on Expansive Soil Slope
BT  - Proceedings of the 2024 International Conference on Civil Engineering Structures and Concrete Materials (CESCM 2024)
PB  - Atlantis Press
SP  - 181
EP  - 189
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-564-5_18
DO  - 10.2991/978-94-6463-564-5_18
ID  - Wang2024
ER  -