基坑的稳定性和变形

基坑的稳定性及变形是基坑设计中两个重要的方面。介绍了几种支护体系（天然土坡、拌和桩重力式挡墙、悬臂板桩墙、单支撑（锚）、多支撑（锚）、土钉墙）可能的失稳形式，及其各种失稳形式计算方法。还介绍了工程中实用的估算基坑周围地面变形的方法。

The stability and de formation is tne two most important problems in the design of deep foundation pit. Introduces the unstable form of slope, gravity rataining wall, cantilever sheet pile wall,single anchored or propped cantileret wall, multi-ancnored or propped wall and soil nail wall, etc.And introduces varions calculating methods for failure. And gives the method to estimate the deformation of the surtounding surface around the foundation pit.