[提要]  在矩形支护结构设计中，通常在基坑拐角圈梁处加1道角撑作为安全储备。为了解斜撑对整个支护结构的作用，采用杆系有限元方法分析了角撑位置和刚度对支护结构内力和变形性状的影响，可供从事基坑支护的工程技术人员参考。
[关键词]  支护结构  角撑  圈梁  有限元法

In the design of rectangular retaining structure, a piece of corner brace is usually used as a safety method in the corner of the pit. The member finite element method( FEM) is adopted to analyze the effect of corner brace on the behavior of retaining structure, and it has some referential value for engineers.
Keywords:  retaining structure;  corner brace;  ring beam;  finite element method( FEM)