Railway Engineering Prefabricated Beam Fields Location Model and Optimization Based on the Matching of Transportation and Erecting Process
As a large temporary facility of railway project,the decision of prefabricated beam fields'number and location is important to the project cost control.The characteristics of railway engineering were considered.The location problem was studied based on the linear scheduling method(LSM).Ten scenarios were proposed to describe the minimum duration constraint of linear engineering based on previous study.Considering the matching of transportation and erecting process,a cost-oriented location optimization model of prefabricated beam fields was proposed,and an improved particle swarm-genetic algorithm with catastrophic operator was designed to make optimal decisions on the number,location,erecting direction,and erecting time of beam fields.The example study shows that the model and algorithm can effectively reduce the number of beam fields and project cost.A better beam fields location plan than the original one was obtained.It can provide methodological support for the whole-line prefabricated beam fields location problem.