截污箱涵系统水力冲淤可行性试验研究  

Experimental Research on the Feasibility of the Hydraulic Scouring of the Intercepting Sewage Culvert System

作　　者：涂向阳 徐琛琛 林平 吴门伍 卢陈 TU Xiang-yang;XU Chen-chen;LIN Ping;WU Men-wu;LU Chen(Pearl River Water Resources Research Institute,Pearl River Water Resources Commission,Guangzhou 510611,Guangdong Province,China;Key Laboratory of Pearl River Estuary Governance and Protection,Ministry of Water Resources,Guangzhou 510611,Guangdong Province,China)

机构地区：[1]珠江水利委员会珠江水利科学研究院,广东广州510611 [2]水利部珠江河口治理与保护重点实验室,广东广州510611

出　　处：《中国农村水利水电》2023年第3期81-85,共5页China Rural Water and Hydropower

基　　金：深圳市水务局2013年度水务发展专项基金科技创新重大专题项目([2013]SWJ05);广州市科技计划基金项目(201904010335)。

摘　　要：分析截流式合流制、完全分流制排水体制的适应性和优缺点,为论证广州某城市截污箱涵系统设置水力冲淤设施的必要性和可行性,开展截污箱涵沿线淤积物厚度测量、样本取样、泥沙组分和淤积成因分析。建立截污箱涵水力冲淤物理模型,合理模拟水力冲洗设施边界条件和淤积物,测量截污箱涵不同泄流条件下的水动力参数,论证利用水力冲洗设施调蓄旱季、初小雨污水,实施“突然开闸、接力冲淤”辅助清淤措施的适用性和可行性。截污箱涵蓄水闸高度仅1.0 m,水力坡降0.10%,冲淤蓄水量有限,箱涵沿线清水动床物理模型试验成果表明:截污箱涵内部蓄水冲淤水沙动力条件不足,水力冲淤效果相对较差,建议取消该箱涵系统中尚未安装的水力冲洗设施,推荐采用“人工+机械”清淤方案。应根据截污箱涵工程特点,制定具有适应性、经济性的防淤、减淤和清淤对策,研究提出的为防淤和清淤策略可为类似截污箱涵工程提供技术参考。Based on the analysis of adaptability,the advantages and disadvantages of the intercepting confluence sewage system and completely separate sewage system are studied in order to demonstrate the necessity and feasibility of hydraulic scouring facilities of sewage culvert system.Detailed prototype thickness observations,silting sampling,sediment composition and silting causes investigations are carried out for a certain sewage culvert system in Guangzhou.By simulating the boundary and initial conditions of hydraulic flushing facilities,a moving-bed physical model with hydraulic flushing function for sewage culvert system is established,and the hydrodynamic parameters along sewage culverts are measured under several working conditions.Combined with the practical engineering management experience,the engineering effect and feasibility of the scheme of“sudden sluice opening and relay flushing silting”by using the hydraulic flushing facility to store the sewage in the dry season and early light rain are demonstrated.Considering the water storage gate height of the sewage culvert system is only 1.0 m,the water storage capacity of these gates is limited,and the hydraulic slope of the sewage culvert is only 0.1%,the physical model test results show that the hydrodynamic conditions of the hydraulic scouring scheme are insufficient,and the effect of hydrodynamic scouring is poor.Cancelling the remaining uninstalled hydraulic scouring facilities is suggested.Moreover,a dredging scheme of“manual and mechanical”is recommended with more adaptability for this specific engineering project.According to the engineering characteristics of the intercepting sewage system,adaptive and economical countermeasures for silting prevention,silting reduction and silting removal should be recommended scientifically.The strategies proposed in this research can provide a technical reference for similar intercepting sewage culvert systems.

关 键 词：截污箱涵 水力冲淤 动床模型试验 清淤对策 可行性分析。 

分 类 号：TV83[水利工程—水利水电工程]