Evaluation And Optimization Of Pipeline Relocation Plan Around The Metro Station In Subway Construction

With the development of subway construction,the use of urban underground space will be higher and higher,we will face a lot of problems on subway through the underground pipeline,which can not be ignored during design subway and construction process.Deal with the problem of pipeline relocation has become a prerequisite for the smooth start of subway construction,and a pledge to complete the engineering as scheduled.In this regard,taking into account the interaction between the subway station buried pipeline and subway construction,selecting the appropriate pipeline to change the layout of the program has become an important part to construct harmonious urban underground space development and utilization.1)Based on the indicator generation mechanism,this paper summarizes the characteristics of the construction of the subway station pipeline,the location requirement of the pipeline,the constraint condition of the construction environment,the social influence of the construction environment with the help of the interpretation of more targeted "pressure,state and response" PSR framework model.And then constructs the evaluation index system composed of the characteristics of the pipeline change project-the influence of the change behavior-the social management constraint.On the basis of this framework,the correlation coefficient method is used to streamline the index system,which laid the foundation for the optimization of the next step.2)After summarizing the development direction of domestic and foreign evaluation methods at home and abroad,this paper mainly analyzes the applicability to pipeline relocation plan of several conventional evaluation methods that are always used to solve the multi-attribute decision-making problem,and put forward the more targeted evaluation scheme for pipeline relocation plan,which also enriches the relevant methodtheory of subway station pipeline relocation program evaluation.3)In view of the characteristics of the research object,this paper uses the combination evaluation to evaluate the merits and demerits of the pipeline.Firstly,we use the interval fuzzy number to express each expert's evaluation matrix of the alternatives,and then introduce the cross entropy theory to define the measure of different index evaluation values,and determine the index weight with this measure difference.And then considering the difference of the level of different experts,apply the gray correlation analysis and the principle of maximizing entropy to determine the size of the expert weight.Finally,weight the evaluation matrix of the alternatives and the weight of the index and the weight of the experts sum and obtain the comprehensive evaluation values of the schemes,and the optimal scheme of the alternative pipeline relocation scheme is determined.4)In this paper,we use the set pair analysis theory to re-express the evaluation matrix of the optimal scheme,and clarify the degree of satisfaction from the evaluation value of the indicators to the ideal program,and then combined with TOPSIS theory to finally get the degree of deviation sequence from the index to the absolute ideal solution.After analyzing the indicators of the level of the indicators,give these indicators some guidance and recommendations to improve and optimize.This paper is a preliminary exploration of the problem of pipeline relocation plan around the metro station in subway construction,which provides a new idea for the comparison and optimization of pipeline relocation plan,and has certain research value.