Study On The Sponge City Road Design Of XiXian New Area

The traditional way of drainage of urban roads is "rainwater-connecting pipe-municipal pipeline" model,with simple,rapid discharge for the principle.With the high strength development of urban land,the impervious area increased rapidly,and the rainfall was not left as a resource,by which the urban water ecosystem cycle has been cut off.Urban waterlogging,heat island effect,black and black water and other issues have become a major problemon domestic urban development.As the first batch of sponge city construction pilot,Xixian New Area Fengxi New City carried out sponge city construction in depth from aspects of city water resources,water environment,water security and water ecology.With the deepening development and large-scale applicationof sponge city constructionconcept,the multi-function of urban roads requires that the sponge design of road projects should be more refined so that the design has strong practical operability.In order to make sponge city construction in Xiaxian New Area from the concept to the land,through discussionof the relationship between the planning and development of Xixian New Area and Sponge City,the paper combined with the specific practice of the pilot studied on sponge city road design deeply and mainly analyzed the problems of key links in the design of sponge city construction project,including the calculation method of SS index,the safety of road structure and water pollution and so on;Then,applied the mathematical model method from the traditional field to the multi-professional integration of the sponge city construction field,providing effect support and verification for sponge city design;In the end,combined with sustainable and green development concept,analyzed the cost of sponge city construction.After in-depth research and analysis,the preliminary conclusions are drawn.Trough constructing the rainwater treatment chain and considering the process of SS removal in the project comprehensively,it provides an effective way and method for the calculation and review of SS index at the design stage;According to a large number of practice,when the sub-band of city road is 3-5m wide,the depth of 1.2m and the thickness of 16-20 cm concrete wall can effectively protect the roadbed structure;Through modular way of pollutioninterception,the initial rainwater quality more reliable design ideas and methodscombined with municipal management and maintenance is provided;Emphasis onsponge city construction project design simulation analysis of the role of feasible urban road over the standard rainwater drainage path and program for the specific design verification;combined with sponge city construction relative to the traditional construction cost changes situation,pointed out that the cost of further optimization of the control method for the transformation of urban construction ideas to provide reference;Finally,give recommendations for the city road sponge facilities maintenance and landscape.