Study On The Cost-effectiveness Of BIM Technology In The Life Cycle Of Reclaimed Water

Water is the source of all life.With the rapid development of China’s economy and the continuous improvement of people’s living quality,the demand for water resources is increasing.In view of the current situation of water resources shortage in China,reclaimed water technology is one of the effective ways to increase revenue and reduce expenditure.However,at present,due to the insignificant cost benefit of the reclaimed water project and the problems of long life cycle,serious lack of information,blocked data flow and high operating cost,it is difficult to make comprehensive and effective analysis based on historical data and current information in the decision-making stage,and the refined management of the whole life cycle has not been realized.Therefore,the study on the whole-life cost-effectiveness of reclaimed water project not only provides theoretical guidance for decision-making design and operation and maintenance management from the perspective of whole-life cycle,but also provides guidance and reference for the formulation of reclaimed water price.This paper applies BIM technology to the construction period and operation and maintenance period of reclaimed water project.,the BIM technology application in the water reuse project is divided into deepening management BIM model,BIM model design and construction of the BIM model,the final acceptance of the operational period of BIM technology management and water reuse system operational data collection system five parts,including deepening the design of the BIM model quantity statistics,construction management BIM model of business management,resource management and contract management,completion inspection and acceptance of BIM model settlement audit is closely related with the control of project total investment,The real-time monitoring of BIM technology in the operation and maintenance period and the operation and maintenance data acquisition system in the operation and maintenance period are closely related to the cost benefit in the operation and maintenance period,so as to realize the accurate and scientific dynamic management of the whole life cycle of the water reuse project in H campus.From the perspective of the whole life cycle,the cost-benefit analysis of the reclaimed waterproject not only considers the direct economic benefit but also the indirect economic benefit.Will total life cycle cost benefit is divided into three phases,the construction project with a total investment of scrap cost,operating cost efficiency and removal,and build a mathematical model based on the project,through the whole life cycle cost benefit analysis,considering the time value of money,with the method of dynamic discount,net present value is applied to estimate the current water reuse cost price is 2.95 yuan/m after,operational phase of the direct economic benefits is68.9309 million yuan,total construction investment and operational phase of the cost is 21.9183 million yuan,the sum of clear the campus water reuse engineering economic benefits outweigh the cost;And campus water reuse engineering,for example,screening of the factors affecting the sensitivity of the whole life cycle cost benefit,using the Crystal Ball software(Crystal Ball)by defining the probability distribution of risk factors to obey,the monte carlo simulation for whole life cycle cost benefit,so as to predict the risk factors of cost efficiency,the influence of the main factors influencing the benefits section is the unit price of tons of water saving,sensitivity was 46.9%,followed by the amount of water sensitivity of 5.2% a year,and then the sensitivity of unit price for sewage treatment is 3.09%;The main factor affecting the cost was the total investment of the construction project,with a sensitivity of 23.0%.Secondly,the discount rate sensitivity is 18.2%,and then the monovalent sensitivity of power is 2.3%.