Research On Optimal Type Selection Of Long-distance Water Transmission Pipeline Based On Luma Lake Water Diversion Project In Xuzhou City

With the development of the city,the population density increases,and the pressure of the city water supply increases simultaneously.In recent years,water safety accidents occur frequently in China.In order to ensure the water safety of the common people,most places begin to build standby water sources,"double source water supply" to ensure the basic people's livelihood,and long-distance water diversion projects will be widely used.As one of the most core components of water diversion project,pipeline project has a huge impact on the construction,construction mode,service life,construction cost and operation and maintenance cost in the later stage of the project.How to select a pipe with high safety,low construction difficulty,reasonable economic cost and long service life on the basis of ensuring the basic benefits of water diversion project is the core problem that can not be avoided in the process of water source construction.The optimization of pipe selection is particularly important in the construction of standby water source and in the long-distance water transmission pipeline project.This paper takes Luoma Lake Water Diversion Project in Xuzhou City as an example For the background,focusing on the most hot water safety issues,taking the selection of water delivery pipes for water diversion projects as the starting point for in-depth study,I hope to provide reference experience for the selection of pipes for other long-distance water diversion projects,and I hope to make my own contribution to the protection of water,the most inclusive welfare of the people.The conclusion is as follows1.Based on the review of domestic and foreign literature and the understanding of the operation status of domestic and foreign distance water transmission project,consulting the opinions of experts in the industry,and comprehensively considering the comprehensiveness and refining of evaluation indexes,the evaluation index system of water transmission pipe selection is determined.The index system comprehensively considers the characteristics of the pipe itself,the safety and reliability of the pipe,the price of the pipe,the operation and maintenance cost in the later period,and the construction difficulty of the pipe,forming four first-class indexes and 17 second-class indexes of the material characteristics,safety,construction and economy2.Through the comparison and selection of the subjective and objective weighting methods currently used,and based on the comprehensive consideration of the advantages and disadvantages of various weighting methods,this paper selects the subjective and objective fusion weighting method,in which the subjective weighting department adopts OWA operator method and the objective weighting part adopts critical method.On the basis of guaranteeing the objectivity of index weight,the method retains the preference of decision-maker to index system based on the actual situation of the project,and improves the applicability and accuracy.3.The TOPSIS method is used to find the most suitable optimal solution.The traditional TOPSIS method respects the objective law between the original data,and judges the evaluation object by the best and worst distance through normalization.On this basis,the concept of fusion weight is introduced in this paper.Before the evaluation,each index is comprehensively weighted.Through calculation,dip is the most suitable for Luoma Lake water diversion project,followed by SP,which is consistent with the actual selection results of the current project.It shows that the model evaluation system selected in this paper is suitable for the selection and optimization of long-distance pipe.