摘要
排水管道沉积物造成的淤积,不仅影响管道本身的过水能力,而且对整个管网系统的过水性能也会产生复杂的影响。在不同管道淤积程度条件下,以相对过水能力与相对超载总时间作为衡量系统排水能力衰减的指标,并利用SWMM对系统排水能力变化的后果进行模拟。根据系统排水能力减小的变化趋势,全过程分为缓慢增长、加速增长(清淤关键期)和爆发式增长(清淤补救期)3个阶段,每个阶段采取不同的管道维护清淤策略,并通过不同管径管道的模拟结果确定重点清淤对象。将本方法用于武汉市某住宅小区时,淤积程度达到46%和66%可作为3个阶段的分界线,对管径≥800 mm的管道进行重点清淤能取得更好的效果。
Siltation caused by sediments in the drainage pipeline not only affects its drainage capacity, but also has a complex effect on the drainage capacity of the whole pipe network system. Under the condition of different siltation degree of pipeline, the relative discharge capacity and the relative total overload time were selected as the indexes to measure the attenuation of drainage capacity, and the consequences of variations in drainage capacity were simulated by SWMM. According to the decreasing trend of drainage capacity, the whole process was divided into three stages: slow growth, accelerated growth (critical desilting period) and explosive growth (recovery period of desilting). Different pipeline maintenance and desilting strategies were adopted in each stage, and the key desilting objects were determined by the simulation results of pipes with different diameters. When the method was applied to a residential district in Wuhan, the siltation degree of 46% and 66% could be used as the dividing line of the three stages, and better results could be achieved by focusing on desilting pipelines with diameter larger than 800 mm.
作者
李璟冉
周毅
李哲
何威良
陈永祥
LI Jing-ran;ZHOU Yi;LI Zhe;HE Wei-liang;CHEN Yong-xiang(School of Civil Engineering,Wuhan University,Wuhan 430072,China;Enigineering Research Center of Urban Disasters Prevention and Fire Rescue Technology of Hubei Province,Wuhan 430072,China;Hubei Key Laboratory of Water System Science for Sponge City Construction<Wuhan University>,Wuhan 430072,China;Wuhan Municipal Engineering Design and Research Institute Co.Ltd.,Wuhan 430023,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2022年第3期118-125,共8页
China Water & Wastewater
基金
广东省水利科技创新项目(2017-33)。
关键词
管道淤积
排水能力
淤积程度
SWMM
pipeline siltation
drainage capacity
siltation degree
SWMM
