Research On Cost And Benefit Of Integrated Pipe Gallery PPP Project Based On System Dynamics

The public’s demand for the modernization of municipal infrastructure construction promotes the development of the PPP project of the integrated pipe gallery.Under the conflicts of the enthusiasm of the government to build an integrated pipe gallery PPP project and its financial strength,the study of the cost of and benefit of the integrated pipe gallery PPP project has become the focus for the investment decision makers.The existing research summarizes the direct benefits of the integrated pipe gallery PPP project,ignoring the huge indirect benefits of the integrated pipe gallery and the interdependence between cost and benefit.This study is based on the theory of system dynamics,from the perspective of investment decision makers,comprehensively identify the cost and benefit system factors of the integrated pipe gallery PPP project,and analyze the system from a holistic perspective.The main contents of this research include:(1)Combining the full life cycle cost theory to analyze the full life cycle cost and benefit of the integrated pipe gallery PPP project,comprehensively identify the cost factors and benefit factors,including construction cost and operating cost,direct benefit and indirect Benefits,combined with historical research to determine the quantitative indicators and calculation methods of various factors;(2)Based on the system dynamics theory,build a comprehensive pipe gallery PPP project cost and benefit system dynamics model,including the causal loop diagram of the relationship between qualitative analysis factors The system flow graph model of the relationship between the model and the quantitative analysis factors;(3)the economics of the project is evaluated through case simulation,combined with the cost and benefit E-C of the integrated pipe gallery,the benefit cost ratio,and the dynamic investment payback period;4)Simulate and analyze the changing trend of the cost and benefit system of the PPP project of the integrated pipe gallery,compare the various benefits,and obtain the maximum benefit factor,the rental income benefit of the space of the pipe gallery,followed by the benefits of disaster prevention and reduction;(5)to ensure the livelihood of the project Public welfare,without considering the benefits of rental income,select sensitive areas for disaster prevention and mitigation benefits The population makes scenario hypothesis simulations,compares the development trends of cost and benefit of integrated pipe gallery PPP projects under different scenarios,explores ways to maximize benefits,and fully understands the benefits of integrated corridors for decision makers,and according to the situation of specific urban areas and local finances.Whether the strength decision makes the construction of a comprehensive pipe gallery in a specific area provides a reference basis.