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隧道建设(中英文) ›› 2018, Vol. 38 ›› Issue (10): 1653-1659.DOI: 10.3973/j.issn.2096-4498.2018.10.008

• 研究与探索 • 上一篇    下一篇

基于屈服接近度的基坑安全性评价方法研究

郭树勋1, 郑世杰1, 王金满1, 杨锐1, 郑帅2, *, 姜谙男2, 孔汇川2   

  1. (1. 中交隧道工程局有限公司, 北京 100102; 2. 大连海事大学交通运输工程学院, 辽宁 大连 116026)
  • 收稿日期:2017-12-31 修回日期:2018-04-03 出版日期:2018-10-20 发布日期:2018-10-26
  • 作者简介:郭树勋(1980—),男,吉林松原人,2003年毕业于吉林建筑工程学院,工程管理专业,本科,高级工程师,现从事项目经理工作。Email: 331075493@qq.com。*通信作者: 郑帅, Email: zhengshuaiwork@foxmail.com。
  • 基金资助:

    国家自然科学基金资助项目(51678101)

Research on Safety Evaluation Method for Foundation Pit Based on Yield Approach Index

GUO Shuxun1, ZHENG Shijie1, WANG Jinman1, YANG Rui1, ZHENG Shuai2, *, JIANG Annan2, KONG Huichuan2   

  1. (1. CCCC Tunnel Engineering Company Limited, Beijing 100102, China; 2.College of Transportation Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China)
  • Received:2017-12-31 Revised:2018-04-03 Online:2018-10-20 Published:2018-10-26

摘要:

为解决基坑施工过程中周边土体未进入塑性状态的危险区域无法得到有效划分的问题,引入屈服接近度概念对基坑工程进行区域安全度评价。基于fish语言编译求解程序,通过FLAC3D软件进行求解,并将所得结果与有限差分法所求得的塑性区分布及岩土体竖向位移结果进行对比分析,同时基于屈服接近度概念对基坑开挖过程中周边土体区域的安全状态进行计算,得到基坑施工过程中周边土体屈服接近度的分布与变化趋势。结果表明: YAI方法可对有限差分法计算结果进行有效的表达,并在其基础上求解非塑性区的屈服接近度,能有效实现对基坑危险区域的划分,并为基坑工程的安全评价提供参考。

关键词: 基坑, 屈服接近度, 危险区域, 安全评价

Abstract:

The dangerous zones of surrounding soil which are not in plastic state cannot be effectively divided during foundation pit excavation. Hence, the yield approach index (YAI) is used to evaluate the regional safety of the foundation pit. The computing program is compiled based on language fish and solved by software FLAC3D. And then the results obtained are compared with plastic zone distribution obtained by finite difference method and the results of vertical displacement of rock and soil. Finally, the safety state of surrounding soils of foundation pit is calculated based on the concept of YAI; and the distribution and variation tendency of YAI of surrounding soil during foundation pit excavation are obtained. The results show that the YAI method can effectively express the calculation results of finite difference method, on the basis of which the YAI of nonplastic zone can be solved and the dangerous zone of foundation pit can be effectively divided. The results can provide reference for safety evaluation of foundation pit.

Key words: foundation pit, yield approach index (YAI), dangerous zone, safety evaluation

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