Fuzzy-random stability analysis of deep foundation pit

ZHANG Hai-tao; HE Ya-bo; XIAO Huan-xiong

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Fuzzy-random stability analysis of deep foundation pit

更新时间：2026-06-25

- Fuzzy-random stability analysis of deep foundation pit
- Vol. 25, Issue 10期　刊出日, (2004)
- 作者机构：
  
  1. 武汉大学水利水电学院,湖北,武汉,430072
  2. 江汉大学建筑工程系,湖北,武汉,430056
  3. 武汉大学土建学院,湖北,武汉,430072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473.2
- Online First：25 July 2014，
  
  Published：2004
- 稿件说明：
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ZHANG Hai-tao, HE Ya-bo, XIAO Huan-xiong. Fuzzy-random stability analysis of deep foundation pit[J]. 2004, 25(10期　刊出日).
DOI：

ZHANG Hai-tao, HE Ya-bo, XIAO Huan-xiong. Fuzzy-random stability analysis of deep foundation pit[J]. 2004, 25(10期　刊出日). DOI：

摘要

基坑稳定性分析中的不确定性主要表现为随机性和模糊性，随机性体现为将各种设计参数作为随机变量

而模糊性主要体现在其失稳的判断标准上，这与深基坑失稳破坏的模糊特征相吻合。重点阐述了深基坑稳定性分析中的模糊性

并采用模糊随机方法，推导出基坑稳定性的广义模糊随机计算模型

该模型可以考虑分析中所涉及到的计算力学参数的随机性和失稳判断标准的模糊性。同时还对基坑失稳概率的标准进行了讨论。最后实例分析了坑底隆起失稳的模糊概率。计算结果说明，模糊随机方法能够更全面、合理地反映基坑的实际稳定性。

Abstract

Fuzziness and randomness are two main uncertainties in the study of stability of deep foundation pit

randomness implies kinds of design parameters being random variables

and fuzziness means that the judgement criterion of stability should be regarded as a vague criterion

which has inexplicit outline

it is in accord with the fact of failure process. This paper emphasizes to study the fuzziness of stability analysis of deep foundation pit

by adopting fuzzy sets and probability theory

a generalized model of fuzzy-random has been put forward to evaluate the stability degree

in this model

the random character of mechanical parameters and the fuzziness of failure criterion

are considered. And it also discusses the failure probability standard of deep foundation pit. Finally

an example is given to calculate the fuzzy failure probability of soil uplift in the bottom of pit

the result indicates that the fuzzy-random method can reflect the actual stability of the foundation pit roundly and rationally.

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