地层结构和地下水位变化是影响地面沉降的主要因素。
The layer structure and the change of groundwater level are the major factors to influence the ground subsidence.
一般地，基坑邻域内的地面沉降是地下水位降低和基坑支护结构水平位移等多种因素耦合作用的结果。
Usually, the settlements of adjacent ground and building are caused by both groundwater lowering and the deformation of pit wall.
分析了基坑降水引起坑周边地面沉降的机理、影响范围，探讨了基坑降水引起地面沉降的影响因素及减少地面沉降的措施。
The article analyses the mechanism and affected range of surface settlement around by excavation perviousness, and discusses the affecting factors and the measures to control it.
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