针对圆形地连墙的空间受力特点，通过理论分析和数值计算，研究了圆形地连墙空间效应的影响因素和影响规律，将圆柱壳有矩理论应用到圆形地连墙中，得到了圆形地连墙内力和变形的解析解。通过Midas GTS 软件建立了圆形地连墙计算模型；通过改变开挖半径、墙体厚度、嵌固深度、内衬厚度和土层参数等因素，对其受力及变形规律进行分析。研究结果表明：开挖半径及墙厚对空间效应影响较大，嵌固深度、内衬厚度和土层的影响均较小，可为类似工程研究提供借鉴。
According to the spatial stress characteristics of circular diaphragm wall，the influence factors and rules of spatial effect of circular diaphragm wall were analyzed through theoretical analysis and numerical calculation. The moment theory of cylindrical shell was applied to the circular diaphragm wall，and the analytical solutions of the internal force and deformation of the circular diaphragm wall were obtained. The basic physical model of circular diaphragm wall was established by Midas GTS. By changing factors such as the excavation radius，wall thickness，embedment depth， lining thickness and soil parameters，the stress and deformation law of the structure are analyzed. The results show that excavation radius and wall thickness have great influence on spatial effect. While the effects of embedding depth，lining thickness and soil layer are small. The findings can provide reference for similar projects.