Study On Incremental Cost Model Of Prefabricated Concrete Buildings

As a new type of green building,the prefabricated building effectively solves the problems of large energy consumption,low production efficiency and serious construction waste pollution caused by traditional cast-in-place buildings.At present,the relevant departments of the Chinese government are actively promoting and developing the construction of prefabricated buildings through a series of support and encouragement of preferential policies.Moreover,when the land is publicly auctioned,the assembly rate of a certain block must be met to a certain standard.Therefore,prefabricated buildings have become a hot spot in the current construction industry.However,since the cost of construction of a prefabricated building is generally higher than that of a traditional cast-in-place building,and the specifications and standards of the prefabricated building are not perfect and comprehensive,many developers and contractors maintain a wait-and-see attitude toward the use of prefabricated construction methods.To attract real estate developers to actively participate in the construction of prefabricated buildings,the key issue that must be solved is the cost-benefit problem of prefabricated buildings.Based on this,this paper explores the incremental cost of fabricated buildings compared with traditional cast-in-place buildings,and establishes the incremental cost model to provide developers with the basis for the selection of the project.For the purpose of research,the following research is carried out on the cost of fabricated buildings:First of all,through a large number of literature analysis and related theoretical research,explore the similarities and differences between the prefabricated buildings and the traditional cast-in-place buildings.Based on the characteristics of real estate projects,the theory of real estate developer cost management is sorted out,and the steps and key points of developer cost management are analyzed,which provides a theoretical basis for subsequent research.Secondly,on the basis of analyzing the different construction modes of the prefabricated building and the traditional cast-in-place building,the composition of the construction cost of the two construction methods is sorted out,and the factors affecting the cost of the assembled building are listed.Furthermore,the differences between the two are further compared and analyzed.Combined with relevant literature analysis,the main influencing factors of the incremental cost of fabricated buildings are selected according to certain rules.Thirdly,according to the different project data and market conditions collected in Hunan Province,we found the relationship between each influencing factor identified in the previous article and the incremental cost of fabricated buildings,and listed the corresponding relationship.Taking each influencing factor as an independent variable,the incremental cost estimation model of the prefabricated concrete building is constructed,which provides a new idea for measurin g the specific data of the incremental cost of the assembled building.Finally,taking a high-rise residential project in Hunan Province as an example,based on the incremental cost model of the fabricated building,the detailed description of the project selection in the early stage of the project,the developer chooses different prefabricated manufacturers and design plans and other applications in the process.The research results have guiding significance for the decision-making of the developer in the construction investment of the prefabricated building,and provide suggestions for the developer's future development strategy.At the same time,it can also provide some reference for the relevant government departments to formulate preferential policies.