某软土深基坑支护方案优选的模糊层次分析研究

A Fuzzy AHP Approach to Optimal Supporting Schemes for Some Deep Foundation Pit in Weak Soil

软土深基坑支护方案的选择是工程中一个重要的课题,针对某软土深基坑三种支护方案,为选择一种最好的支护方案进行理论分析研究,采用模糊层次分析方法,针对三种方案,从4个影响因素,9个因子进行层次分析,采用专家打分的方法,利用模糊数学的相关知识,建立因子对方案的相对优隶属度矩阵与权重,综合可得三种方案的综合评价指标的量化值,比较大小,最后得出SMW法支护在三者之中是最优的,与实际工程相吻合,对类似工程基坑支护方案的优选有一定的指导意义。

The selection of supporting schemes for deep foundation pit is an important topic of project. There are three supporting schemes to be selected for deep foundation pit in some weak soil. In order to select one of the best supporting schemes to study theoretically, Fuzzy analytical hierarchy process is used to analyze. There are three schemes that can be divided 4 big influence factors and 9 small factors. Based on the score by expert, the fuzzy mathematic theory is used to establish the relative membership matrix and weight between factor and scheme. The quantity of Comprehensive evaluation index can be achieved from the three schemes. The third scheme(SMW) is the best method in the three schemes, which is inosculated with the practical engineering. The result proves that fuzzy AHP method can be used to elect the best project from the schemes for deep foundation pit in similar engineering.