Cost Factor Analysis Of Prefabricated Concrete Building Structure Based On Budget Quota

In the construction industry,traditional cast-in-place concrete buildings have been criticized more and more by the society because of their shortcomings such as excessive energy consumption,serious pollution and more waste of resources.Prefabricated concrete buildings have attacted wide attention for their low energy consumption,low pollution and less labor demand,and they are gradually replacing cast-in-place concrete buildings.However,compared with the developed countries,the development of prefabricated buildings in China is relatively slow.At present,one of the important reasons hindering prefabricated buildings’ development is theirs high cost.This paper consulted a variety of domestic and foreign literature to comprehend the research and development status,construction technology and construction process of prefabricated buildings at China and abroad,and selected several prefabricated component factories and construction projects for field research to provide theoretical evidence.In this paper,the construction cost of prefabricated concrete construction project as the starting point,and analyzed the cost of a prefabricated concrete building in Henan Province,to find out the main factors affecting the cost of prefabricated concrete construction,as well as proposed countermeasures and suggestions for the cost control of prefabricated concrete construction.This paper introduced the structure concept and evaluation index of prefabricated building structure system,and analyzed the common structural system characteristics of prefabricated concrete buildings,as soon as explained the main types of prefabricated concrete components.Then based on the decision-making,design,construction,use,demolition of the five stages of cast-in-place and fabricated concrete construction costs were analyzed and compared,to found out the main cost differences of each stage.In the last,combined with a prefabricated concrete building in Henan Province,the paper calculates the civil engineering cost of building A,and virtual a cast-in-place concrete building B,whose building parameters are equivalent to building A.Through the comparative analysis of the total cost of building A and building B,the cost of reinforced concrete sub projects and the cost of measures sub projects,it was found that the cost of building A is higher than building B.Prefabricated concrete buildings had advantages in labor cost,measure cost and disadvantages in material cost.It was found that the high cost of reinforced concrete sub projects in prefabricated concrete buildings is the main reason for the large cost gap between prefabricated concrete buildings and cast-in-place concrete buildings.Finally,based on the results of project cost analysis,the paper put forward the views and suggestions on controlling the cost of prefabricated concrete construction from the three levels of enterprise,industry and government.At the enterprise level,the methods of cost control were put forward from the perspectives of design unit,component production unit and construction unit;at the industry level,the standardization and generalization of prefabricated buildings market was accelerated to expand the market and give full play to the scale effect of prefabricated concrete buildings;at the government level,the incentive policies were accelerated to improve the enthusiasm of enterprises.