采用改进区间层次分析法评估地铁工程地下水风险

将模糊数学理论引入到地铁工程地下水风险评估中，用改进层次分析法中区间数来代替模糊评估中确定数值评估地下水风险。以南宁市轨道交通一号线火车站站作为研究对象，根据区域地质及水文地质条件，分别对勘察、设计、施工和运营阶段地下水风险进行评估。通过类高斯方法计算区间隶属度，构建区间数判断矩阵，利用区间可能度互补矩阵进行修正。计算结果表明:施工过程中防管涌、流砂等施工质量和现场抽水管理对地下水风险影响最大；按照风险区间数符合度评估标准，南宁地铁火车站站地下水风险综合评估等级为“良”；所得结论对类似地铁工程地下水风险评估和防控具有借鉴和指导作用。

Groundwater Risk Assessment by Interval-based Improvement of Analytic Hierarchy Process in Subway Project

The fuzzy mathematics theory was introduced into groundwater risk assessment in subway project, the interval number was instead of the fuzzy evaluation to determine the groundwater risk in the improved analytic hierarchy process. The railway station of Nanning Metro Line 1 was taking as the research object. Based on the area geology data and hydrogeologic condition, the groundwater risk was evaluated respectively from investigation, design, construction and operation phases. The membership degree was calculated by the Gaussian method, and the interval number judgment matrix was constructed, the complementarity matrix of interval possibility was used to correct the membership degree. The calculation results show that the construction quality and pumping management are the greatest influences on the groundwater risk in the construction process, such as the prevention of piping and running sand. According to the evaluation criteria of the interval number, the groundwater risk rating of Nanning railway station is good, and the results have reference and guidance for similar railway project about groundwater risk assessment.