基于综合赋权-TOPSIS法隧道突涌水风险评价及应用

摘要

The risk evaluation results of tunnel water inrush based on existing method is fuzzy and the quantification of evaluation index is incomplete.As a result, the existing risk evaluation method for tunnel water inrush is improved and the TOPSIS method is adopted.The comprehensive weighting method formed by analytic hierarchy process (AHP) method and coefficient of variation method considering both the main and objective factors is used.According to the results of the evaluation index classification, four typical samples of risk level are constructed.The risk level of the tunnel water inrush is established based on the samples and closeness degree of the idealized solution.Therefore, the risk evaluation method for tunnel water inrush based on TOPSIS method is established systematically and has been applied to water inrush evaluation of Xiangyun Tunnel on Guangtong-Dali Railway.The results show that the risk evaluation results of tunnel water inrush based on comprehensive weighting-TOPSIS method coincide with the actual excavation results, so as to provide a new method for tunnel water inrush evaluation.%为解决目前隧道突涌水风险性评估结果模糊、评价指标定量化不全面的问题,改进评价指标并将TOPSIS法运用于隧道突涌水风险性评估中,将AHP法和变异系数法相结合组成同时考虑主、客观因素的综合赋权法,根据评价指标分级结果构造4个风险等级的典型样本,以典型样本与正理想解的贴进度确定隧道突涌水风险等级区间,建立TOPSIS法隧道突涌水风险评估体系.以广大铁路祥云隧道为例,应用该方法对6个洞段进行突涌水风险性评估.结果表明,综合赋权-TOPSIS法隧道突涌水风险性评估结果准确且与隧道开挖结果相符,可为隧道突涌水风险评估提供一种新的方法.