Study on effect of suction on earth pressure on retaining and protecting structure for foundation pit

QI Guo-qing; CAI Zheng-yin; GAO Hua-dong; TAO Lian-jin

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Study on effect of suction on earth pressure on retaining and protecting structure for foundation pit

更新时间：2026-06-25

- Study on effect of suction on earth pressure on retaining and protecting structure for foundation pit
- Vol. 27, Issue S1, (2006)
- 作者机构：
  
  1. 四川大学,成都,610065
  2. 广州四航工程技术研究院,广州,510230
  3. 南京水利科学研究院岩土工程研究所,南京,210024
  4. 北京工业大学建工学院,北京,100022
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU441
- Online First：15 December 2006，
  
  Published：2006
- 稿件说明：
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QI Guo-qing, CAI Zheng-yin, GAO Hua-dong, et al. Study on effect of suction on earth pressure on retaining and protecting structure for foundation pit[J]. 2006, 27(S1).
DOI：

QI Guo-qing, CAI Zheng-yin, GAO Hua-dong, et al. Study on effect of suction on earth pressure on retaining and protecting structure for foundation pit[J]. 2006, 27(S1). DOI：

摘要

在进行基坑支护设计时，现行规范采用朗肯土压力理论计算基坑支护结构土压力。这种设计计算方法是基于饱和土力学理论的，误差较大。依据非饱和土力学理论，对基坑非饱和土体主动土压力及被动土压力计算公式进行了推导。在此基础上，以实际工程为例，就基质吸力及施工季节对基坑支护结构土压力的影响进行了探讨。

Abstract

In the design of the retaining and protecting structures of foundation excavation

the theory of Rankine’s earth pressure is used to calculate the earth pressure on the structure in the present code. The method of these design and calculation is built according to saturated soil mechanics. The results of these methods are not very satisfied. The equations of active earth pressure and passive earth pressure are deduced based on the theory of unsaturated soil mechanics. Finally

taking the actual project for example

the effect of suction and construction time on the earth pressure on the retaining and protecting structures of foundation excavation is studied according to the equations.

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