Research On The Optimization Of Construction Progress Of Prefabricated Building Projects

Under the background of actively promoting the industrialization of new-type buildings and vigorously popularizing prefabricated buildings in China.it is very important to study the factors affecting the construction progress of prefabricated buildings.From the perspective of improving the construction progress of prefabricated buildings,this paper uses 5M1 E and analytic hierarchy process to find out the main factors affecting the construction progress,and optimizes the main factors.The main research contents and results are as follows:Firstly,the critical chain method is used to optimize the process interspersion planning considering the personnel factor.Based on heuristic algorithm,the priority of resource scheduling of each process is considered,and the network plan is adjusted according to the priority of the process,so as to obtain a more reasonable construction schedule.On this basis,the key chain is identified and a certain buffer time is added,and finally the minimum process insertion time required for the construction of the main structure of the project is obtained.It has been proved that the construction time is reduced by 22.5% after the implementation of process interspersing planning,and the shortage of personnel in the construction process is also reduced.Secondly,a layout optimization model for the minimum distance between prefabricated components and tower cranes is established.By analyzing the layout characteristics of precast component yard,the stacking problem of component is regarded as a rectangular layout problem.Considering that the minimum hoisting distance of components is the optimization objective,the objective function and related constraints are defined.A stacking optimization model with the shortest hoisting distance between the tower crane and prefabricated components is constructed,the genetic algorithm is also used to solve the proposed model.In addition,in the process of genetic algorithm coding,this paper combines real number coding and binary coding to form double-layer coding to improve the optimization ability of the algorithm.Based on the actual project case optimization,compared with the traditional human experience,The optimized model can reduce the hoisting distance of prefabricated components by110 meters,improve the hoisting efficiency and speed up the construction progress of prefabricated building projects.Thirdly,this paper also puts forward some specific requirements for the progress management of assembly building construction site,and establishes corresponding management systems for each department of the project department.Finally,this paper proposes a management model based on offline responsibility system and online component management system.Through the deeply and systematic study of the two main factors affecting the prefabricated construction project,this paper can not only effectively accelerate the construction progress of the prefabricated construction project,but also enrich the theory and method of research on the construction progress of the prefabricated construction project.At the same time,it provides a new idea for the construction enterprises to better solve the problems on the construction site about the progress management.