暴雨情景下的山区公路排水系统韧性仿真分析  

Simulation Analysis of Resilience of Mountain Highway Drainage Systems under Rainstorm Scenario

作　　者：林智鹏 任亮 LIN Zhipeng;REN Liang(Key Laboratory of Road and Traffic Engineering,Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《交通科技》2024年第6期17-22,共6页Transportation Science & Technology

摘　　要：为明确雨、洪背景下的山区公路排水系统韧性特征,依托太行山高速邯郸山区工程,采用芝加哥雨型模拟不同重现期的暴雨情景,构建基于SCS模型山区公路降雨径流仿真,提出山区公路排水系统的雨洪韧性指数(FRI)计算方法,从响应、抵抗和恢复3个维度分析了2 h累计降雨量对山区公路的排水系统韧性的影响。结果表明,山区公路排水系统最低性能在60 min时达到,与汇水区的洪峰到达时刻相近;随降雨重现期的增加,系统性能逐渐下降,系统韧性也随之逐渐降低;系统性能变化率为负对应韧性曲线的响应阶段,变化率为正对应恢复阶段,不同暴雨情景下性能变化率负极值始终大于正极值;系统韧性特征在大暴雨过程和特大暴雨过程分别呈线性和高阶多项式衰减,相关系数R2均大于0.995。To elucidate the resilience characteristics of mountain highway drainage systems under rainstorm conditions,the Handan section of the Taihang Mountain Expressway was utilized as a foundation.The Chicago rainfall pattern was employed to simulate scenarios of heavy rain with various return periods,and a rainfall runoff simulation model for mountainous highways based on the SCS model was developed.A method for calculating the flood resilience index(FRI)of mountain highway drainage systems was proposed,and the impact of 2-hour cumulative rainfall on the resilience of mountain highway drainage systems was analyzed from three dimensions:response,resistance,and recovery.The findings indicate that the minimum performance of the mountain highway drainage system occurs at 60 minutes,coinciding with the arrival of the peak flood in the catchment area.As the return period of rainfall increases,the system's performance diminishes gradually,and the system′s resilience also decreases.The rate of change in performance is negative during the system's response phase,and positive during the recovery phase.Under different heavy rain scenarios,the negative extreme values of the performance change rate consistently exceed the positive values.The resilience characteristics of the system exhibit linear and high-order polynomial decay during both heavy and extreme rainstorm processes,with correlation coefficients R 2 exceeding 0.995.

关 键 词：道路工程 雨洪韧性指数 山区公路 排水系统 降雨重现期 

分 类 号：U417.3[交通运输工程—道路与铁道工程]