| With the acceleration of the scale and speed of subway construction,various safety accidents follow one after another.Different construction schemes directly affect or even determine whether the construction can be carried out safely.Therefore,it is of great significance to ensure the smooth progress of construction safety by evaluating the construction plan and then selecting the best plan.In this paper,through a comprehensive analysis of the influencing factors of the optimization of the construction plan of the subway station tunnel project,based on the criteria of technology,economy,environment and effect,a preliminary selection index system for the plan has been established.And the method based on BP-DEMATEL-SW is used to rank the influencing factors of the construction plan,in order to find the main influencing factors,and get a set of index system with strong systematic and proper index quantity.Then,based on this research,starting from the subjective and objective weights of uncertain language variables,an attribute weight optimization model based on uncertain language variables is constructed.In order to seek the compromise or consistency of the weight values obtained by different weighting methods,the Euclidean distance function is introduced to construct a method for determining the combined weights.Finally,by further expanding VIKOR multi-attribute decision-making,an optimal model of subway tunnel construction scheme based on uncertain language variables and VIKOR is proposed.Aiming at the problem of consistency of multi-granularity language,a calculation method for transforming multi-granular uncertain language variables into uniform granularity is constructed.Taking Qingxiushan Station of Nanning Rail Transit Line 3 as an example,the construction scheme was optimized and sequenced.The results show that: A3 is the best construction plan by using this mathematical model,the result is consistent with the actual project.Through the analysis of risk control and on-site monitoring data during the construction process,it is proved that the optimal scheme performs well in all aspects,and the feasibility and effectiveness of the model are verified.This mathematical model always guarantees that the decision information is an uncertain language during the construction scheme decision-making,which not only avoids the loss of preference information of the decision maker,but also reduces the calculation complexity and data redundancy,which provides a reference for the optimization of similar projects. |
