基于耦合模型的城市隧道洪涝安全评估研究

Research on Flood and Waterlogging Safety Assessment of Urban Tunnels Based on Coupling Model

摘要:

从源头有效治理城市内涝，提升城市品质，对城市隧道开展洪涝安全评估工作，显得尤为重要。通过耦合一维河网水动力模型、二维陆域地表模型及地下管网排水模型，建立一套珠三角城市隧道洪涝模型计算方法。通过模型计算结果，得出隧道淹没水深，结合城市建设用地洪涝风险等级划分标准中内涝风险图的要求，评价拟建隧道风险等级。再通过水文分析、暴雨、洪水及外江潮位综合分析，对城市隧道进行防洪排涝评估，供其他类似项目参考。

Abstract:

It is particularly important to conduct the flood and waterlogging safety assessments of urban tunnels in order to effectively control the urban waterlogging at the source and improve the urban quality. By coupling a one-dimensional river network hydrodynamic model, a two-dimensional land surface model and an underground pipeline network drainage model, a set of urban tunnel flood and waterlogging model calculation method in the Pearl River Delta region is established. Based on the model calculation results, the depth of tunnel inundation is obtained. Combined with the requirements of the waterlogging risk map in the urban construction land flood waterlogging risk grading standard, the proposed tunnel risk grade is evaluated. Then, through the comprehensive analysis of hydrology, rainstorm, flood and outer-river tide level, the flood control and waterlogging drainage of urban tunnels are evaluated for reference of other similar projects.