中文摘要：

收集上海地区93个采用地下连续墙作为围护结构的深基坑工程实测变形资料，从统计角度探讨地下连续墙的变形性状。连续墙的最大侧移介于0．1％H和1．0％H之间，平均值为0．42％H，其中H为开挖深度。围护结构的最大侧移一般位于H-5～H＋5的范围之内。研究结果表明，无量纲化的最大侧移随着墙底以上软土层厚度的增加而增大。钢筋混凝土支撑基坑的无量纲化最大侧移与支撑系统刚度的关系不大，而钢支撑基坑无量纲化最大侧移随着支撑系统刚度的增大有减小的趋势。给出根据坑底抗隆起稳定系数来预测墙体最大侧移的上、下限及平均值的曲线。墙顶侧向位移随着首道支撑深度位置的下移而增大，而最大侧移与首道支撑的深度位置无明显的关系。

英文摘要：

A database of 93 case histories of diaphragm wall deformation due to deep excavations in Shanghai soft deposits is presented. The deformation behavior of diaphragm walls is analyzed. The maximum lateral wall displacement ranges from 0.1%H to 1.0%H, with a mean value of about 0.42%H, where H is the excavation depth. Generally speaking, the location of the maximum lateral wall displacement occurs within the range from H-5 to H＋ 5. The maximum lateral wall displacement increases with increasing thickness of the soft soil above wall toe. For those walls supported by concrete struts, system stiffness has little effect on the normalized maximum lateral displacement. For those walls supported by steel struts, normalized maximum lateral displacements decrease with increasing system stiffness. A method for predicting the maximum lateral wall displacement based on the factor of stability against basal heave is proposed. Lateral displacement of wall top increases with the lowering of the first level strut. However, location of the first level strut does not have significant effect on the maximum wall displacement.