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针对环形支撑体系在基坑工程设计中存在的一些问题,从理论角度提出了优化设计的方法,并编制了相关的有限元程序。通过对程序计算结果的对比分析,筛选出较优的设计参数。以绍兴某个深基坑工程为例,详细计算分析了环形梁尺寸以及开挖顺序对基坑的受力和变形的影响。并将计算结果与监测资料对比,验证了本文方法的适用性,同时表明在某些特殊形状基坑中,环形支撑体系不失为一种有效支撑形式。
Aiming at some problems existing in the design of the pit supporting system, a method of optimizing the design is put forward from the theoretical point of view, and the relevant finite element program is compiled. Through the comparative analysis of program calculation results, the better design parameters were screened out. Taking a deep foundation pit project in Shaoxing as an example, the influence of annular beam size and excavation sequence on the stress and deformation of the foundation pit is calculated and analyzed in detail. The calculated results are compared with the monitoring data to verify the applicability of the proposed method. It also shows that the annular support system is an effective supporting form in some special shaped foundation pit.