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地铁外挂空间项目作为一种新的工程形式在近两年上海第二批地铁建设大潮中逐渐出现。狭长型地铁车站与两侧外挂基坑相继开挖会对基坑自身和临近基坑及周边环境带来复杂影响,存在基坑之间明显的相互作用。以轨道交通17号线淀山湖大道站,北临东渡悦来城、南靠青浦万达茂生活购物广场基坑群工程为背景,从基坑自身内力变形、基坑开挖总工期及时空效应、大面积基坑开挖隆起控制等方面评价群坑开挖对邻近地铁车站的影响以及群坑间的相互影响。通过分析不同的开挖顺序情况下邻近基坑的位移量,提出了合理的狭长型基坑结合两侧基坑群对周边建筑保护最有利的开挖技术,以期类似工程借鉴和应用。
As a new form of project, subway plug-in space project gradually appeared in the second batch of Shanghai Metro construction tide in recent two years. The long and narrow subway station and the excavation of two sides of the base pit excavation will have a complex impact on the pit itself and the adjacent pit and the surrounding environment, there is a clear interaction between the pit. Taking Dianthushu Avenue Station of Metro Line 17, north of Dongdu Polaris City and south of the foundation pit project of Qingpu Wanda Mau Shopping Mall, from the deformation of foundation pit, the total construction period of foundation pit and the space-time effect , Excavation and excavation control of large area excavation, etc., to evaluate the influence of group excavation on adjacent metro stations and the mutual influence between groups of crater. By analyzing the displacement of adjacent excavations under different excavation sequences, a reasonable excavation technique is proposed, which is suitable for the protection of the surrounding buildings by combining the narrow and narrow foundation pit with the foundation pit groups on both sides, so as to draw lessons from similar projects.