土工基础

›› 2011, Vol. 25 ›› Issue (1): 70-.

• 工程实录 • 上一篇    下一篇

用有限元方法分析基坑开挖的可靠度

孟庆银   

  1. （黑龙江省齐齐哈尔市齐宏市政工程建设有限公司，齐齐哈尔  161005）
  • 收稿日期:2009-12-29 出版日期:2011-02-20 发布日期:2014-06-27
  • 作者简介:孟庆银，男,1961年生，工程师，主要从事路桥勘察设计等工作

Reliability Analysis of Foundation Pit by Finite Elements Method

MENG  Qing  yin   

  1. (Qihong Municipal Engineering Construction Co., Ltd., Heilongjiang Province, Qiqihaer  161005, China)
  • Received:2009-12-29 Online:2011-02-20 Published:2014-06-27

摘要： 基坑稳定性评价是岩土工程中的重要问题，基坑土体参数通常表现出较强的变异性，因此可靠度分析方法能更合理评价基坑的稳定状态。采用有限元方法对基坑开挖、支护进行模拟，并对开挖后的基坑进行强度折减计算，得到基坑稳定性安全系数，然后结合Rosenblueth统计矩法对基坑稳定性进行可靠度分析。分析方法简单，能够获得合理的结果，可为基坑工程设计和施工提供参考。

关键词: 基坑开挖, 有限元, 强度折减, 可靠度分析, 统计矩法

Abstract: The stability evaluation of foundation pit is an important geotechnical engineering problem. There is strong variability in soil properties of foundation pit, therefore the reliability analysis method is an appropriate method to evaluate the stability of foundation pit. The excavation and support of foundation pit is simulated by elastic-plastic finite elements method, the security coefficient of foundation pit was obtained by the strength reduction method, then its reliability was analyzed by the Rosenblueth statistical moment method. The method is convenient and results are reasonable, which is valuable for the design and construction of foundation pit.