段绍伟   杜  飞   沈蒲生
 （湖南大学土木工程学院  长沙 410082）

[提要]  利用非线性有限元方法，研究了基坑深度、墙体长度以及墙体插入深度对深基坑开挖变形的影响，具体研究了墙体侧向挠度、地表沉降和坑底隆起的变化。提出了具有实际工程意义的某一步段下基坑的最大开挖深度、墙体插入深度的有效范围等。
[关键词]  基坑开挖  非线性有限元  开挖变形

Effect of the depth of excavation,length of wall and embedded length of wall on the deformation of excavation of deep foundation pit are studied by using the nonlinear FEM, for example lateral deflection of wall, ground sinking and basal heave. The biggest depth of excavation of foundation pit and effective area of embedded length of wall are presented.
Keywords: excavation; foundation  pit; nonlinear  FEM; deformation