| Since the implementation of the reform and opening policy,the urbanization process in China has accelerated,the construction industry has developed rapidly,as a result,the amount of construction and demolition waste(C&DW)has increased dramatically.If it is not handled properly,it will not only occupy a large amount of land resources,but also pollute water,soil,air and other natural resources.Accurate quantification of C&DW is a prerequisite for effective management of C&DW.Therefore,it is very necessary to study the quantification method of C&DW.First of all,this paper studies the quantification methods of C&DW at home and abroad,and summarizes them into three kinds of methods: field observation method,waste production rate method and variable model method,which can provide reference for quantification of C&DW at different levels and in different activities.Then,according to the sources,chemical properties and resource recovery level of C&DW,the paper establishes C&DW classification system.The first-level classification can meet the government control needs,and the second-level classification is convenient for on-site source classification and disposal.The sources of C&DW is analyzed by the examples of housing construction project and bridge engineering of railway engineering.Through visiting and researching and literature reading,the C&DW quantitative model based on the project budget is established,and it is used to predict the number of C&DW during the construction phase.This paper also uses Python programming language to write code,and achieves the prediction process by the extraction of the bill of quantities and other data information.At last,the feasibility of the model is verified by the example of Daxing Jiugong Project and Xuhonghe Bridge Project of Xuyan Railway.The prediction results show that the errors between the predicted quantity and the actual production quantity of the two projects are less than 10%,and the model has a very high accuracy. |
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