土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (2): 219-223.

• 专题论述 • 上一篇    下一篇

基于Midas渗流-应力耦合模型分析深基坑开挖对临近建筑物的影响机制

马佳兵，毕庆涛，冯巧云，杨锦涛   

  1. （华北水利水电大学，郑州 450046）
  • 收稿日期:2021-09-25 修回日期:2021-10-08 出版日期:2022-04-30 发布日期:2022-04-27
  • 作者简介:马佳兵（1995-），男，硕士研究生，研究方向为岩土体稳定性分析。

Influence of Deep Excavation on the Adjacent Buildings Considering Coupling Effect of Both Seepage and Stress

MA Jiabing, BI Qingtao, FENG Qiaoyun, YANG Jintao   

  1. (North China University of Water Resources and Electric Power, Zhengzhou 450046)
  • Received:2021-09-25 Revised:2021-10-08 Online:2022-04-30 Published:2022-04-27

摘要： 以周口市某住宅工程为依托，参考周口地区近半年的降雨强度，建立渗流～应力耦合模型，施加渗流作为边界条件，构建基坑开挖的数值模型。通过计算得出的基坑周边土体沉降和地下连续墙水平向变形的计算结果与现场实测数据对比，结果基本吻合，从而验证了数值模拟的可靠性，也证实基坑及周围建筑物在施工中均处于安全，基于数值模拟结果研究深基坑开挖对邻近建筑物的影响机制。通过室内试验得出了不同降雨情况下土的力学指标，再输入模型进行计算，分析降雨入渗对基坑开挖的影响，为类似工程提供参考。

关键词: 渗流-应力耦合, 基坑开挖, 临近建筑物, 沉降, 变形

Abstract: This paper presents a case history of a deep excavation for a residential building on the adjacent structures in Zhoukou area by considering the effect of the seepage and stress coupling. A numerical analysis model of the deep excavation was established by considering the precipitation data of the area as the boundary conditions. The measured values of the ground subsidence behind the supporting structure and the horizontal deflection of the cut-off wall were compared with the numerical results so that the reliability of the numerical model was validated. Based on the numerical analysis results, it was concluded that the deformation of the cut-off wall and the adjacent buildings are acceptable. The laboratory tested soil strength parameters under various precipitations were used in the numerical models so that the influence of the rainfall on the performance of the deep excavation supporting structures could be numerically investigated.

Key words: seepage-stress coupling effect, deep excavation, adjacent buildings, settlement, deformation

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