Analysis of stability against upheaval for foundation pit with anisotropic soil strength

CAI Yuan-qiang; WANG Jia-qi; SUN Hong-lei

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Analysis of stability against upheaval for foundation pit with anisotropic soil strength

更新时间：2026-06-25

- Analysis of stability against upheaval for foundation pit with anisotropic soil strength
- Vol. 33, Issue 4, (2012)
- 作者机构：
  
  1. 浙江大学软弱土与环境土工教育部重点实验室,杭州,310058
  2. 温州大学建筑工程学院,浙江,温州,325035
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473
- Online First：26 April 2012，
  
  Published：2012
- 稿件说明：
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CAI Yuan-qiang, WANG Jia-qi, SUN Hong-lei. Analysis of stability against upheaval for foundation pit with anisotropic soil strength[J]. 2012, 33(4).
DOI：

CAI Yuan-qiang, WANG Jia-qi, SUN Hong-lei. Analysis of stability against upheaval for foundation pit with anisotropic soil strength[J]. 2012, 33(4). DOI：

摘要

天然土体通常为非均质、各向异性土体，目前常用的基坑抗隆起计算方法多是针对均质各向同性土体的。采用非均质非线性各向异性岩石破坏准则，考虑土体原生各向异性，假定Prandtl破坏模式，采用地基承载力模式进行基坑的抗隆起稳定性分析。根据滑移线理论计算承载力，利用有限差分法结合边界条件编制出相关计算程序，并定义基坑抗隆起稳定性系数。研究表明，各向异性比的提高会降低安全系数；内摩擦角和插入比的增大可有效提高基坑的稳定性。

Abstract

Natural soil is usually nonhomogeneity and anisotropy. However

the calculation methods of stability against upheaval which are commonly used are applicable to isotropic and homogeneous soils. Considering the failure criterion of nonhomogeneous nonlinear anisotropic rocks and the primary anisotropy of soil

assuming Prandtl failure mode

analysis of stability against upheaval is given using the model of foundation pit bearing capacity. According to capacity calculated by the slip line method and using finite difference method combined with boundary conditions

the related calculation program is compiled； then stability coefficient against upheaval is defined. The results show that the larger the anisotropy ratio of soil strength is

the smaller the safety factor is. And with the increasing of internal frictional angle and the retaining wall insertion ratio

the safety factor will be enhanced significantly.

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