工程科学与技术2024，Vol.56Issue(1)：228-236,9.DOI:10.15961/j.jsuese.202200705
溃堤洪水在有压雨水管网街区演进的试验研究
Experimental Study on the Evolution of Dike-break Flood in Urban Neighborhood Under Pressurized Stormwater Pipe Network
摘要
Abstract
The evolution process of dike-break flood in the urban neighborhood equipped with pressurized stormwater pipe networks was very complex.In general,the buildings and stormwater pipe networks in urban neighborhood has profoundly changed the evolution characteristics of flood,thus affecting the hydraulic characteristics of the drainage function of the neighborhood.Based on the generalized sink model established in typical urban neighborhood,including houses,sidewalks and stromwater pipe networks,we measured the block water depth,stromwater pipe net-work flow and pressure during the evolution of typical urban neighborhood for different dike-break flood,so as to explore the impact of different storage heights,forebay inlet flow on the fluctuation of neighborhood water level and the discharge flow of pressurized stormwater pipe networks.Generally speaking,the dike-break flood will form a large area of hydraulic jump under the action of the side wall of the flume and the house.Furthermore,there are thin layered sheet flows near buildings.With the process of flood evolution,the hydraulic jump area first migrates hori-zontally and merges at the sidewalk.Then,the hydraulic jump is gradually dissipated in the longitudinal direction of the block road until it disap-pears.After 100 seconds,the water level in the neighborhood is basically stable,showing a trend of"first increasing,then decreasing"from up-stream to downstream.In fact,during the evolution of the neighborhood,compared with the flow of different forebay inlets,the impact of differ-ent storage heights on the discharge of the pressurized stromwater pipe network is more significant.The peak flow at the gutter inlet of the block at the maximum storage height is about 1.5 times of the maximum forebay inlet flow.In this study,on the basis of combining the water level of the block and the pressure of the pressurized stormwater pipe network,the Euler number is adopted to calibrate the discharge coefficient of the short pipe submerged outflow formula.Finally,the error of the corrected theoretical calculation value is reduced from 32%to 2%,perfectly re-flecting the discharge capacity of the street gutter inlet.In general,the research results not only provide detailed verification data for mathematical models,but also provide theoretical guidance for urban flood control.关键词
溃堤洪水/有压雨水管网/雨水口/概化水槽模型Key words
dike-break flood/pressurized stormwater pipe networks/gutter inlet/generalized sink model分类
建筑与水利引用本文复制引用
张晓雷,刘书瑜,董柏良,赵建坤,张立涛..溃堤洪水在有压雨水管网街区演进的试验研究[J].工程科学与技术,2024,56(1):228-236,9.基金项目
国家自然科学基金项目(51725902 （）
41890823) （）
河南省高等学校重点科研项目计划(21B770002) （21B770002）
广东省水动力学应用研究重点实验室开放研究基金(gdsky[2018]003) （gdsky[2018]003）
华北水利水电大学高层次人才科研启动项目(20190906) （20190906）
