Research On The Prevention Technology Of Urban Waterlogging

In recent years,it is often seen that the city waterlogging because of the rainstorm in our country occurs,most of the cities were suffering from the city waterlogging,it bad to society economy and people's life.City waterlogging pain is one of the most serious natural disasters in China,and the study of city waterlogging prevention technology is crucial.To alleviate this phenomenon,the following contents are studied in this paper.The paper analysis that the causes and characteristics of city waterlogging occurred from man-made and natural two aspects at first.The frequent extreme weather is the mainly causes in natural,and the man-made causes include the destruction of human activities on the natural,the acceleration of urbanization process of urban ground,the design of urban drainage system are still exist some problems.The paper analysis the problems in the design under the basis of urban planning and design specification.In view of the phenomenon that the city underpass tunnels will waterlogging every rain and water serious,the paper analysis the main factors affecting the city underpass tunnels is that the slope and length of the ramp,and corresponding uggestions are proposed according to the example.In the introduction of the SWMM,the paper research a regional city based on the SWMM software,and modeling of the rain and flood process in the region with different designed rainfall reappearing period,which including the situation of the drainage pipes and nodes in the study region,and analyze the simulation results.In addition,this paper also compares the short duration heavy rainfall and long duration of weak rainfall,and analysis the situation of the drainage pipes and nodes,and get the conclusion that short duration of strong precipitation than long duration of weak precipitation is more conducive to the drainage of the city by the result.The paper put forward some measures to alleviate the city waterlogging in the end according to before,it is mainly that increasing the drainage pipe diameter and water permeability of ground,select the low friction pipe and some measures for construction and maintenance,and the practice of these measures should adjust according to the actual construction conditions and economic conditions,and then,the paper compares the overload of pipeline and node in the study area with before,it is find that these measures could improve the ability of flood control and drainage of the city appropriatly,and provide a reference for city flood work.