The Establishment And Application Of Urban Drainage Model Based On Infoworks

Underground pipeline is the city's blood vessels.In recent years with the rapid development of urban construction,underground pipeline scale continues to expand,which gradually exposed many problems.Especially in the rainy season,many domestic cities are in varying degrees into the city waterlogging,so that people's lives and property suffered heavy losses,these issues on urban planning and management of the new challenges and requirements.This paper mainly introduces the concept,classification and application of the hydraulic model of the drainage pipe network,reviews the development and research status at home and abroad.And summarizes the basic functions of the InfoWorks ICM software and the calculation principle of the model and the technical methods.Based on InfoWorks ICM software,this paper builds a hydraulic model of drainage network in S water quality purification plant of Kunming City,and finds out the operation status of drainage network in the sewage treatment plant of the water purification plant.The data of municipal pipe network in the study area are sorted out and rain and dirt mixed situation.The influence of the division of the catchment area on the model simulation is very important.In the past,the drainage model is divided into a large-scale pipe network,so that the watershed can not be accurately expressed the area of a water area.In this paper,according to the area of the catchment area,the water area is divided into the sub-catchment area according to the orthophoto map and the road map in the study area.Then the watershed area is carried out according to the actual situation,and to make adjustments.By comparing the two different zoning methods,and comparing the two kinds of division modes with the five-year rainstorm intensity,the paper collects the watershed with manual division.More realistic and effective response to a range of water area,more in line with the actual situation,but also improve the accuracy of the model conclusions.On the basis of optimizing the catchment area,according to the design of rainstorm intensity in Kunming,the rainfall intensity curve was designed and the drainage model was run with different drainage models.The overflow rate,pipeline flow rate and full load of each node were simulated by 1,5,and 50 years(2 hours of design rainfall).According to the model,the hydraulic characteristics of the nodes in the pipe network can be simulated,and the hydraulic characteristics of the pipes in the pipe network are simulated.Secondly,the overload status of the pipes in the pipe network is simulated.The correctness of the model is verified by comparative analysis.Through the operation of the model,you can find the problems in the drainage pipe network.This approach provides technical support and theoretical basis for better maintenance of the operation of the pipe network.In the process of model establishment,we have worked out a set of working procedures for drainage hydraulic model,which not only provide reference and basis for the design and management of drainage system in Kunming,but also provide the design and management of hydraulic model for drainage network in other cities of the China.