深基坑双排桩支护结构的数值计算模型研究

Research on the numerical calculation model of deep foundation pit with double row piles support structure

对双排桩支护形式下的基坑开挖过程进行了内力和变形计算,对比了不同结构连接形式对结果的影响以及不同本构模型在基坑数值分析中的适用性,计算结果表明连/压梁与支护桩之间采用刚性连接能得到与实测值较为吻合的变形结果,而采用铰接形式将得出与实际不符的过大侧向变形。

This paper carries on internal force and deformation calculation of foundation pit excavation process under double row piles support form,and compares the impacts of different structure connection forms on the results and the adaptability of different constitutive model in foundation numeral analysis.Calculation results show that adopting the rigid connection between continuous/compaction beams and support piles can obtain the deformation result which is fit for the practical survey value,while adopting hinged joint form will obtain the extra lateral deformation which is not fit for the practice.