基于容积法的地下空间暴雨内涝风险模型及应用

Rainstorm Waterlogging Risk Model for Underground Space Based on Volumetric Method and Its Application

通过将地下空间所处的汇水流域简化为倒四棱锥,基于容积法提出了一种内涝风险模型,并以西安市小寨地铁站为实例进行模拟分析。结果显示,输入实测降雨数据时,模拟结果与实测积水深度基本吻合;在50年一遇设计暴雨强度下,该模型的模拟结果与InfoWorks ICM模型的模拟结果基本一致,表明该模型的模拟结果较为合理。同时,基于大量实际应用案例,总结了3类不同地形的汇水流域划分方法,可为地下空间内涝风险评估提供依据。

A waterlogging risk model based on the volumetric method by simplifying the catchment basin in the underground space into an inverted quadrangular pyramid was proposed,and the model was applied for simulation analysis in Xiaozhai Subway Station of Xi’an City.The simulation results were basically consistent with the measured ponding depth when the measured rainfall data was input.The simulation results of the model were basically consistent with those of InfoWorks ICM model under the rainfall return period of 50 years,indicating that the simulation results of the model were reasonable.At the same time,three kinds of catchment basin division methods of different terrains were summarized based on a large number of practical application cases,which could provide a basis for the waterlogging risk assessment of underground space.