| In recent years,the real estate industry has transformed from traditional human intensive to high-tech intensive,and prefabricated buildings have also ushered in new opportunities for development.This study selects prefabricated building project as the research object,compares the cost of prefabricated construction with that of ordinary cast-in-place construction,and analyzes the source of difference between them.By analyzing the main influencing factors of prefabricated construction project cost,this paper puts forward the key methods to control the cost of prefabricated construction project,which provides theoretical support for the cost control of prefabricated construction project.The main research contents and achievements are as follows:(1)In this paper,through the actual engineering analysis,the cost details of the two construction methods are compared,and the reasons for the increase of cost are more intuitive.In order to quantitatively study the difference in cost composition between prefabricated building and cast-in-place building,the prefabricated building of Xingfu housing project is studied,and the change of cost is analyzed in detail,and the unit price difference per square meter is obtained.The results show that the prefabricated component of prefabricated building is 614.66 yuan / m2,accounting for 47.56% of the total cost,while the traditional cast-in-place building concrete is only 99.4 yuan / m2,accounting for 17.49% of the total cost.The production,installation and transportation of prefabricated components constitute the main cost of prefabricated building,which is the main reason for the cost increase.In addition,in the composition of prefabricated building cost,labor cost accounts for the proportion 76%,indicating that personnel management is also the focus of cost management.(2)According to the comparative results of literature research,expert discussion and project actual data,the analytic hierarchy process(AHP)is used to quantitatively analyze the key factors that affect the change of cost,and 15 key factors causing cost increase are obtained.The results show that prefabricated component production factor,installation and transportation efficiency factor and human resource management factor are the top three key factors causing cost increase,accounting for 31%,27% and 20% respectively.The ranking of influencing factors can provide basic data for cost management and control,and provide direction for cost improvement and management upgrading.(3)Based on the research results of assembly cost analysis and key influencing factors,this paper puts forward effective management measures and cost control suggestions from the aspects of prefabricated component production,installation and transportation,human resources,management and external factors,and has been effectively verified in actual cases.This control reduced the cost per square meter of the project from 1992.15 yuan / m2 to 1608.63 yuan / m2,383.52 yuan / m2 or 19.25%.Finally,the comprehensive benefits of prefabricated buildings are elaborated,providing basic data for balancing cost control and comprehensive income.The results of this study can provide theoretical support for the cost control of prefabricated construction projects,and also provide effective support for actively promoting the technological development of prefabricated buildings. |
