Research On Optimization Of Scheduling Methods For Railway Construction Project Based On LSM

At present,the scale of railway construction in our country is large.Progress control is of great significance to realize construction goal and improve investment eff-iciency.Network planning method is mainly adopted to make scheduling of construction,while previous research indicates its limitations in linear railway construction project.Network planning method can be improved effectively by Linear Scheduling Method(LSM),which can present construction progress and accomplishment graphically,stimulate construction rate precisely,ensure continuity of construction progress and simplify complexity of construction scheduling.Under the engineering application background of typical linear railway construction project,the limitations of traditional planning techniques applied to railway construction project are discussed in this dissertation.Through literature research,this study investigates the basic principles and application research status of LSM and analyzes the composition of railway construction project and linear construction process.After comparing the limitations of traditional planning techniques and the advantages of LSM applied to linear projects,this dissertation focuses on the issues of schedule making,resources optimization and cost optimization in the application of Linear Scheduling Method for railway constructions.In this dissertation,innovations are achieved in the following three aspects.(1)LSM is applied to construction scheduling in railway construction in this dissertation.Based on LSM,Railway Linear Scheduling Method(RLSM)is put forward.According to the classification of construction activities,this dissertation introduces construction phrase into RLSM and provides the calculation method for linear construction rate in construction period.The dissertation also establishes constraint system for construction activities and builds the linear planning model of railway construction project based on RLSM.(2)Based on RLSM,RLSMR model is set up in two stages in this dissertation,which presents construction methods for resources matrix and construction rate matrix,meanwhile puts forward construction matrix.The research structures constant set,variable set,conditional and optimization of model through CSP and multi-objective optimization method.And the effectiveness of the model is verified as well.(3)Based on RLSM,RLSMC model is structured in this dissertation,which presents construction methods of expenses matrix,sets up RLSMC mathematical optimization model with construction teams and expenses matrix as decision variables,meanwhile calculates algorithm for the optimum expenses strategies.And the effectiveness of RLSMC is verified through example data.