Study On The Comprehensive Application Of Construction Waste For Sponge City In Shanghai Area

At present,many cities are faced with the problem of construction waste treatment,and there are many problems in the application of solid waste resources in Shanghai.At the same time,because of the vigorous development of sponge city construction,a large number of construction raw materials are needed,which provides a new opportunity for the recycling of construction waste.In order to better solve the above problems,this research focuses on the reuse of construction waste in sponge city in Shanghai,summarized the utilization of construction waste in sponge city,studied the research of construction waste as soil covering material and construction waste in rainwater garden,and tried to integrate and verify the comprehensive application of construction waste in sponge city.Sorting,crushing,screening of 5～15 mm、15～25mm grain grades by a professional recycling company,the construction waste which comes from abandoned buildings demolished in Shanghai was tested as covering materials and rainwater garden fillers.The results are as follows:(1)When the construction waste particles are used as covering materials,the temperature and humidity balance of the surface soil can be maintained and the seasonal difference has little effect.Comprehensive ecological and economic value,select 6 cm thick construction waste small particles.(2)When the construction waste particles are used as rainwater garden fillers,the construction waste has the greatest advantage,especially in the acceleration of drainage rate and the increase of water storage rate in the extreme rainstorm weather;However,total runoff reduction rate is obviously reduced.Considering construction waste’ total runoff reduction rate is more than 25%,so the optimal parameter is 25 cm thick small granular waste.(3)On the basis of theoretical research,this study combines the design of solid waste landscape regeneration of a green space in Pudong,Shanghai to carry out practical research.Then landscape elements and design techniques widely used in the concrete application of construction waste in engineering practice are summarized from the embodiments,and a certain degree of demonstration is made for the previous experimental results.This paper summarizes ways of recycling construction waste for sponge city in Shanghai area and selects the best application parameters to provide theoretical basis for recycling construction waste and sponge city construction in Shanghai and even the whole country.