| At present,the combined system overflow pollution has become the most urgent problem in the drainage system of the old city in most cities of china.As an effective measure to control the combined system and overflow pollution,investment and construction of storage and regulating basins are gaining more and more application in many cities at domestic and abroad.Taking Tianjin city as an example,according to the center of the city five road system,Shanghai road system,radio system and North Dagu road system combined sewer overflow pollution characteristics of the system,based on the analysis and evaluation of existing drainage facilities on the source control,process of collecting,processing and terminal combination strategy,engineering measures and management measures.With integrated solutions economically feasible and advanced technology,to solve the problem of rain in downtown Tianjin confluence overflow pollution serious production area,the combined sewer overflow pollution control area,realize the function of the urban drainage system to enhance service,improve the quality of the water environment,taking into account the confluence area of flood control standards.The main research contents of this paper:(1)Through the diagnosis and evaluation of the drainage system in the confluence area of Tianjin City,this paper analyzes the present situation,the existing problems and the planning of the drainage system.(2)The closure and the processing capacity of around drainage facilities,combined with the analysis of Tianjin city water quality characteristics of rainfall and rain early for nearly 30 years,to calculate the reasonable volume of rainwater storage tank based on the calculation of combined design interception ratio of drainage system and the "Tianjin city construction" technical guidelines for the sponge.(3)Through the domestic and foreign design concepts,standards and successful project case study,focusing on the storage tank cleaning,deodorization,and other parts of the process and the operation mode of the storage tank design demonstration.(4)The overall engineering design and economic evaluation of the storage tank.The research results of this paper can provide a reference for the economic and efficient solution to the problem of urban waterlogging and overflow pollution. |
