[提要]  将内支撑式支护结构假设为带桩的框架结构，计算了其内力、变形，并对其性状进行了分析。重点对支护结构的刚度方程进行详细推导，并给出了相应子程序。通过算例对内支撑长度、刚度对支护结构内力与变形的影响进行了探讨。
[关键词]  内支撑 支护结构  桩 框架结构

The retaining structure with struts is presumed pile - frame structrue, the internal force and deformation are calculated, the behavior of the structure is also analysed under influence of bracing length and rigidity of the struts.
Keywords: struts; retaining  structure; pile; frame  structure