Prevent Waterlogging System And Facilities Under The Frequent Urban Waterlogging

In recent years, with the acceleration of global climate change, extreme weather conditions, including urban rainfall increased frequency increased, making the world within the scope of the phenomenon of heavy rainfall caused by urban waterlogging disasters frequently appear, and there is growing trend.Aimed at the situation, waterlogging problems caused the Chinese government attaches great importance to, housing and urban-rural development published "urban drainage(rain) prevent waterlogging comprehensive planning outline", combining with the national standard request the actual situation of baoji, hancheng city downtown area, in accordance with the "City drains facilities census data collection and management of technical guidance" analysis the basic data of city downtown area survey. Through the above analysis, use the technical measures of "water storage, penetration, Water purification, recycling, drainage " to compile "baoji city drainage(rain) prevent waterlogging comprehensive planning" and the " hancheng city drainage(rain) prevent waterlogging comprehensive planning".In this paper, combining the above two planning, summarizing the urban waterlogging disasters cause, management ideas, system planning and design, prevent waterlogging system arrangement and the design method of various facilities, on the basis of to prevent waterlogging system and prevent waterlogging facilities of reasonable urban planning research, obtained the following main conclusions:1. Analyze the characteristics and the causes of waterlogging, another main reason is the city drains within the main system is not sound. Than waterlogging prevention research status at home and abroad, combining with the experience abroad city prevent waterlogging should establish and perfect the relevant planning at the present stage in China, to strengthen the construction of infrastructure, prevent waterlogging drainage, to carry out the early warning and management system.2. Study of urban drainage system. Prevent waterlogging system is mainly composed of "a water storage ", " drainage " of two parts, if according to the eliminator rivers, can be water storage pool, drainage pumping station, elimination and line water drainage channel joining induces three way; If according to the flood water areas in downtown location situation to analyze, to water storage pool, drainage pumping station, elimination and line water drainage channel way to induce four kinds of cohesion.3. Study of urban drainage facilities. Waterlogging water line drainage channels in the old city, the layout of new area two cases study, its design flow finally confirmed by rainfall intensity, box culvert box culvert section size; The layout of flood water storage pool can be summarized as three types: the upstream water storage pool, elimination and downstream water storage pool, its take area load method to determine volume; Capacity of drainage pump station in accordance with the 12 h to rule out 30 years in 24 h to determine the amount of the storm.