基于受力计算的深基坑支护设计优化方法

Optimum method of support design for deep foundation pit based on forces analysis calculation

各种深度围护结构的深基坑层出不穷,但是对于围护结构中支撑位置的选取及优化却没有十分安全而有效的方法,本文通过对围护结构的受力进行简化分析,提出一种优化支撑位置的计算方法,并基于成都地铁2号线某深基坑施工段进行数值分析,通过有限差分软件FLAC3D对其有效性进行了数值模拟验证。

There are many deep foundation pits with different depth and various enclosure structures,but no safe and effective method exists for steel support location selection and optimization in enclosure structure. Through simplified analysis of enclosure structure force,this paper put forward a calculation method for optimizing steel support location and carried on the numerical analysis in one deep foundation pit construction section of Chengdu metro line 2 ,the validity of which is proved by numerical simulation and verification with finite difference software FLAC3D .