基于数值分析的软土深基坑支撑体系优化设计

Optimized design of support system for soft soil deep foundation pit based on numerical analysis

随着地下建筑物深度的不断增加,其基坑支护设计的难度亦在加大,特别是软土深基坑的支护设计难度更大。为了对软土深基坑支护体系进行优化设计,采用三维数值分析软件对某深基坑支护进行模拟,对多个环形支撑方案进行比选优化,最终确定了安全性满足要求、经济合理,同时还能最大程度方便施工、缩短工期的最优方案,并成功实施。其经验可为类似的工程项目提供借鉴。

With the increasing depth of underground buildings, the design of foundation pit support becomes more difficult, es- pecially the design of soft soil deep foundation pit support. In order to optimize the design of support system for a soft soil deep foundation pit, a three dimensional numerical analysis software was used to simulate the support system. Through comparison and optimization of several double ring support schemes, an optimal scheme which is economically reasonable, maximally conducive to construction and can meet the safety requirements and shorten construction duration is determined. The successful application of the scheme can provide reference for similar projects.