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总结目前深基坑开挖过程中出现的水文地质问题，指出深基坑防水方案优化设计的必要性。在分析井点降水与隔渗两种防水方案优缺点的基础上，提出基坑防水应以降水为主、隔渗为辅，共同构成安全经济的防水系统。同时，详细阐述防水方案优化设计的原理、思路和设计系统实现的程序框图，为深基坑防水方案优化设计系统的实现提供了依据。
Summarizes the hydrogeological problems that have occurred during the excavation of deep foundation pits, and points out the necessity of optimizing the design of waterproofing schemes for deep foundation pits. Based on the analysis of the advantages and disadvantages of the two types of waterproofing schemes for precipitation and seepage at wells, it is proposed that the waterproofing of foundation pits should be dominated by precipitation and supplemented by seepage, which together constitute a safe and economical waterproofing system. At the same time, the principle and thought of the optimal design of the waterproof scheme and the block diagram of the realization of the design system are elaborated in detail, which provides the basis for the implementation of the optimization design system for the deep foundation pit waterproof scheme.