为研究北京地铁地连墙基坑受力变形特征，采用统计法对近五年期间北京在施地铁基坑变形监测数据进行了整理分析，并按照围护结构厚度及支撑体系类型对地连墙基坑进行分类，得出了不同类型基坑地表、墙体、格构柱的变形规律以及基坑沉降槽曲线。结果表明：（1）基坑监测范围内的地表变形中地表隆起占高达20~45%，支撑体系类别及围护结构厚度不同对地表隆起比例与最大变形范围存在不同影响；（2）根据墙顶变形方向及幅度将墙体变形分为4种类型，开挖深度对墙体变形量的影响要大于围护结构厚度增大对土体变形的约束作用；（3）墙顶的变形规律以上浮为主，占统计数据的90%以上；（4）格构柱同样以隆起为主，大于墙顶隆起。

For the study of Beijing subway even wall stress deformation characteristics of foundation pit, using statistical methods for during the period of "much starker choices-and graver consequences-in" in Beijing subway analyzes the deformation monitoring data, and according to the thickness of palisade structure and type of the wall of foundation pit supporting system are classified, it is concluded that the different types of foundation pit surface, wall, the deformation law of lattice column and foundation pit settling tank curve. The results show that :(1) surface uplift accounts for a large proportion of the surface deformation of foundation pit, and the types of supporting system and the thickness of enclosure structure have different effects on the surface deformation; (2) According to the direction and amplitude of wall top deformation, the wall deformation is divided into four types. The influence of excavation depth on wall deformation is greater than the positive effect of increasing the thickness of enclosure structure. (3) The deformation law of the wall top is mainly upward, accounting for more than 90% of the statistical data; (4) The deformation of lattice columns is also dominated by uplift, which is larger than that of the wall top.

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