连续墙基坑施工过程力学模拟及基坑稳定性研究

Simulation of Foundation Pit Construction on Basis of Strength Reduction Method and Research on Its Stability

在岩土工程中,连续墙的基坑支护形式安全性高、适用性强、稳定性好,得到了工程界的广泛认可,但连续墙基坑支护结构在施工过程中的力学性能却较为复杂.以一实际工程为例,采用Midas-GTS分析工具建立了3维基坑施工阶段研究模型,采用连续墙和内支撑的组合方案,用强度折减法分析了施工过程中各种工况下的基坑应力及应变情况,对连续墙施工过程进行了力学模拟,并对基坑稳定性进行了研究和评估.研究结果对基坑施工过程力学模拟和基坑稳定性评估有一定借鉴意义.

In geotechnical engineering,the support pattern of continuous wall has high security,strong adaptability and good stability,which has been widely appraised in the engineering field.The mechanical properties of foundation pit supporting structure of continuous wall in the construction process are relatively complex.This paper uses Midas to build the three-dimensional research model for different construction stages of foundation pit,in which the foundation pit applies the scheme of combining continuous wall and inner support.This paper uses the strength deduction method to analyze the stress and strain conditions of foundation pit under different working states,and makes mechanical simulation for construction process of continuous wall.Furthermore,this paper makes research and estimation on the stability of foundation pit.The results of the study have important significance for mechanical simulation of construction process and stability evaluation of foundation pit.