基于IOWA-VAC的地铁车站暴雨内涝脆弱性评价

Vulnerability Assessment of Heavy Rainfall and Waterlogging in Subway Stations Based on IOWA-VAC

为科学评价地铁车站暴雨内涝脆弱性,确定地铁车站暴雨内涝脆弱性的敏感性指标,提高地铁车站暴雨内涝管理水平,提出基于IOWA-VAC的地铁车站暴雨内涝脆弱性评价方法,该方法基于压力—状态—响应(PSR)理论构建地铁车站暴雨内涝脆弱性评价指标,利用IOWA算子按升序原则对指标数据重新排序,同时引入θ系数动态调整区间边界权值,得到指标权重,引入向量夹角余弦(VAC)检验待评价目标向量和理想目标向量一致性的贴近度,实现了代数思维向空间几何思维的转变,得到待评价目标等级。进而以郑州地铁5号线海滩寺站为例,运用单因素敏感性分析确定地铁车站暴雨内涝脆弱性的敏感性指标,评价了海滩寺站暴雨内涝脆弱性。结果表明,郑州地铁5号线海滩寺站暴雨内涝脆弱性等级为Ⅳ级,属于高度风险,为地铁车站暴雨内涝脆弱性管理提供了可行性建议。

In order to scientifically evaluate vulnerability of heavy rainfall and waterlogging in subway Stations,determine the sensitivity index as well as improve the management level of the heavy rainfall and waterlogging in subway stations,an evaluation method based on IOWA-VAC was proposed.Firstly,an evaluation index system was constructed based on Pressure-State-Response(PSR)theory.Then,the index data was reordered in ascending order by using the IOWA operator,and the final weight of the new data was obtained by introducing coefficientsθto dynamically adjust the interval boundary weights.The Vector Angle Cosine(VAC)was introduced to test the closeness of the consistency between the target score vector to be evaluated and the ideal target vector,so as to realize the transformation from algebraic thinking to spatial geometry thinking,and the target grade to be evaluated was obtained.Single factor sensitivity analysis was used to determine the sensitivity index.The practicability of the evaluation model was verified by taking the Yansi station of Zhengzhou Metro Line 5 construction projects as examples.The results show that the vulnerability level of the Yansi station of Zhengzhou Metro Line 5 isⅣ,with high risk.Thus,it provides feasible suggestion for vulnerability management of heavy rainfall and waterlogging in subway stations.