Innovative Design of Regional Road Cross Section in Sponge City Construction Planning in Northwest China
Based on the urban road planning in northwest China,the cross section structure of urban roads is designed with the concept of sponge city construction.Through the"sponge pool"and"sponge body"designed for the space structure of the urban road slow lane,green belt,non motorized vehicle lane and the lower layer of sidewalk,the rapid collection and storage of rainwater can be realized;The lower struc-ture of the non motorized vehicle lane is added with a reservoir to realize the storage,storage and recycling of rainwater.The impermeable structure of sponge pool wall ensures the safety and stability of subgrade foundation;The design of the sponge pool permeable structure and flushing device is conducive to maintaining the operation function of the sponge city and improving the service life of the operation facilities of the sponge city.Through the innovative design and application of urban road cross section,the project can alleviate the heat island effect,dry island effect and rain island effect that need to be solved urgently in northwest arid cities.
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