深基坑中内支撑结构两种数值计算方法分析

The study of two numerical methods of the truss internal bracing in foundation pit engineering

结合某深基坑支护工程实践,采用内支撑支护结构体系对复杂周边环境条件下深基坑进行了支护,并采用三维数值计算模型对内支撑支护结构体系进行了受力分析,且与二维模型计算结果进行了对比,指出二维模型的计算结果与三维数值计算模型的计算结果有较好的一致性,但二维模型计算深基坑有较大的局限性。

The paper combines with the support project of some deep foundation pit, adopts the diagonal bracing support structural system to support the deep foundation pits with complicated surrounding environment, undertakes the stressed analysis of the internal bracing system with the three-dimension numerical calculation model, compares the calculation result with the one of the two-dimension model, and points out the results of the two-dimension model is consistent with the one of the three-dimension numerical model, but the former has limitation in the calculation of the deep foundation pit.