连续道路上多雨水口径流特性数值模拟研究  

Numerical Simulation Study on Runoff Characteristics on Continuous Roads

作　　者：徐灵华 曾云辉 胡腾宇 申屠华斌 郭帅 XU Linghua;ZENG Yunhui;HU Tengyu;SHENTU Huabin;GUO Shuai(Power-China Huadong Engineering Corporation Ltd.,Hangzhou 310014,China;College of Civil Engineering,Hefei University of Technology,Anhui 230009,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州310014 [2]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《天津建设科技》2023年第5期7-13,共7页Tianjin Construction Science and Technology

基　　金：安徽省重点研发计划项目(202104i07020012)。

摘　　要：为了研究不同降雨强度与纵坡下道路雨水口对路面径流的节流效果,采用计算流体力学(CFD)软件CFX对连续道路上多个雨水口进行数值模拟,重点分析当上下游雨水口等距(20 m)时不同流量和坡度下截流能力变化规律。模拟结果表明:当入流量为120.00 L/s时,积水基本布满整个路面,有初期洪涝趋势;沿道路纵坡方向,同一纵坡下,雨水口截流量随收水量增加而增加,但截流效率逐渐减小有饱和趋势;当纵坡为0.3%和4%时,距道路起始端远的雨水口受径流宽度及流速影响截流效率最低且纵坡对下游雨水口截流效率影响比上游雨水口大,故雨水口设计应考虑道路纵坡的影响。In order to study interception effect of road runoff by rainwater inlet under different rainfall intensity and longi-tudinal slope,,this paper uses CFX software to simulate several rainwater inlets on continuous roads and the change rule of intercepting capacity under different discharge and slope when the uptream and downstream rainwater outlets are equidistant(20 m).The results show that:When the inflow is 120.00 L/s,street runoff water basically covers the entire road surface,and there is a slight flooding trend;Under the same longitudi-nal slope,the interception capacity of the street inlets increases with the increase of the inflow.However,the interception efficiency gradually decreases and there is a saturation trend;When the longitudinal slope is 0.3%and 4%,the downstream inlet far from the beginning of road have the lowest interception efficiency due to the width and velocity of the runoff.The interception efficiency has a greater impact ondownstreaminlets than upstream inlets,so the impact of the road longitudinal slope should be taken into consideration refers to gully design.

关 键 词：城市道路 排水系统 雨水口 截流效率 数值模拟 

分 类 号：TU992[建筑科学—市政工程]