城市轨道交通内涝风险评估研究及实践

Research and practice on urban rail transit flooding risk assessment

城市轨道交通内涝风险评估是对评估对象是否满足防止暴雨涝水倒灌的要求进行判定。根据国内外标准及工程经验,城市轨道交通内涝风险可以评估对象防淹标高是否大于其周边最高内涝水位加安全超高作为评估依据。结合评估实践经验,城市轨道交通内涝风险评估可按照评估标准确定、信息收集梳理、模型初评估、综合研判、口部达标性评估、风险应对建议等步骤开展。

The risk assessment of urban rail transit waterlogging is to determine whether the elevation of the entrance meets the requirements of preventing floodwater from flooding back.According to domestic and international standards and experience,the risk of urban rail traffic flooding can be evaluated based on whether the elevation at the mouth is higher than the maximum flooding water level of surrounding area plus safety superelevation.Based on practical experience in evaluating related projects,the general process of assessment can be divided into following stages:identification of assessment criteria,information collection and review,initial assessment using model analysis,comprehensive judgement,conformity assessment using identification assessment at station entrance,and recommendation of risk management strategy.