[提要]  通过对深层搅拌桩支护结构优化设计的探讨，说明采用优化方法进行设计可以解决常规设计试算的繁琐问题，并可以获取深层搅拌桩支护的较优挡墙宽度和挡墙深度优化解，达到比较合理的设计效果。
[关键词]  深层搅拌桩 支护结构 优化设计 优化解

The optimum design of retaining structure with deep mixing pile is studied.By method of optimization, the complexity of traditional method is reduced, and the optimum solution is achieved. The results of optimum design are more reasonable and economical.
Keywords:  retaining structure; deep mixing pile;optimum design;optimum solution