针对多种深基坑降水方案的科学选择问题，采用综合考虑技术指标、经济指标、施工指标和运行指标的多目标决策方法，对复杂的地层与边界条件下多基坑降水方案的科学选择建立了模糊决策模型，分析了定量和定性目标各指标间的重要性权重，得到了综合各因素的科学方案决策成果，为工程建设的降水方案优选决策提供了科学依据。

In scientific selection of dewatering plans during the excavation of a deep foundation pit, the muti objective fuzzy decision making method is used, which comprehensively considers various indexes such as technique, economy, construction and operation. The fuzzy decision making model of scientific selection under the condition of complex geologic and boundary conditions is established, and the weights of quantitative and qualitative objectives are analysed, and the scientific decision result from synthesizing four factors is obtained.