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中文摘要：
基于上海某地铁换乘枢纽基坑群的工程地质资料，使用Midas／gts三维有限元软件，建立基于修正剑桥模型的基坑群三维模型，对基坑群不同开挖顺序进行模拟，分析得出不同工况下相应的地表沉降规律，并与单坑开挖的情况进行比较．研究表明，相比单坑开挖的情况，基坑群三种开挖方式除在基坑群短边地下墙处使地表沉降有所降低之外，大部分范围内地表沉降均有不同程度的增加．本文的研究成果对于软土地区基坑群的设计和施工具有一定的参考意义．
英文摘要：
this paper carried out a study pits on ground settlement in the engineering bae on the influences of different excavating sequences in foundation kground of deep foundation pits construction in Shanghai. Based on the engineering geology material of one interchange terminals for metro in Shanghai, a three - dimensional fi- nite software Mdias/gts was utilized to establish the three - dimensional model for foundation pits in terms of the Modified Cambridge model. Subsequently, the simulation of foundation pits construction with three different ex- cavating sequences was realized. Then the laws of ground setdement under different construction conditions were obtained. This paper made a comparatively detailed comparison between those three conditions with a single foundation pit. The results show that, compared to a single foundation pit, the ground settlement amplitudes of three different excavations in foundation pits were heavier than that of a single foundation pit in almost the whole area, expect for the location at the short side of underground value for the design and construction of foundation pits in soft wall. The research results are of certain reference soil area.
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