Research On Scheduling Optimization Of Resource-constrained Projects Under Prefabricated Construction Mode

At present,China’s industrialization process is in a critical period.The traditional way of building housing projects has problems such as long project cycle,low production efficiency,low resource utilization rate and environmental pollution,which do not meet the needs of national economic development and contradict with the concept of healthy and sustainable development of the construction industry.Compared with traditional cast-in-place projects,prefabricated buildings pay attention to the protection of resources and environment during construction,which can effectively reduce the discharge of pollutants and the impact on the surrounding environment,and improve the construction labor productivity.However,in the actual construction process,due to the lack of input from the general contractor in design,production,construction and management,as well as the complexity of multi-space scheduling of prefabricated projects,unreasonable resource allocation occurs,which leads to the extension of the project period,excessive resource consumption and increased cost.Therefore,it is of great theoretical and practical significance to study the resource scheduling of projects under the prefabricated construction mode.This paper studies the prefabricated building mode of resource scheduling problem,will more space dimension conversion to the same period were analyzed,and under the condition of information sharing is given priority to with assembly space,cooperative production transportation space,based on the fabricated project scheduling more space on the characteristics of mutual constraint,mutual restriction,give full consideration to the completion of the production of transportation space time on the whole scheduling plan of assembly space,namely the impact on the comprehensive cost of the assembly space value,and constructed to minimize assembly space cost as the objective function of the bi-level programming model,we design a nested genetic algorithm for solving the model.Finally,in order to verify the resource-constrained project scheduling problem for prefabricated building mode optimization of bi-level programming model,through the real case of heuristic scheduling model and a bi-level programming model of optimal scheduling results are analyzed,so as to verify the resource-constrained project scheduling problem in prefabricated building mode bi-level programming model,the advantages of bi-level programming model can better reflect the prefabricated construction scheduling problem of multidimensional association,design of genetic algorithm can effectively solve the problem of limited resources,and provides policy recommendations for the contractor.