Finally , cheap personal computers are used to construct distributed environment and design a three - level co - evolution model system . the system includes main server program algorithm , sub - server algorithm and client algorithm . it solves communication problem between all the processors and evolutes scheme design and detail design hierarchically and synergically 最后建立分布式并行计算环境,设计基于遗传算法的基坑支护分布式三层协同演化系统,分别构造主服务程序算法和子服务器算法程序及客户机输入界面,解决客户服务器之间的通信、主服务器与子服务器之间的通信问题,对方案和细部、细部和子细部进行分布并行协同搜索,获得出最优方案。