Research On Construction Quality Evaluation Of Prefabricated Concrete Buildings

The prefabricated concrete building is the construction of precast concrete components manufactured in the factory and transported to the construction site,which are assembled,connected,and partially poured.Compared with the traditional cast-in-place building,the assembled concrete building has the advantages of shortening the construction period,saving energy and materials,saving labor force,green environmental protection and so on.This type of building is widely used in many developed countries abroad.At present,In order to accelerate the transformation and upgrading of construction industry,our country is actively promoting development of prefabricated construction,but because our country development time is shorter,this way of building the system of the technology is not mature enough,lack of corresponding practical management experience,prefabricated construction engineering quality is uneven,prefabricated units and construction units quality management level is differ in thousands ways.It is a meaningful subject that how to evaluate the prefabricated concrete construction quality and improve the quality of the precast units and construction unit's management level in order to adapt to the demand of the construction of the prefabricated building large-scale.So this article studies mainly around the prefabricated concrete construction quality assessment,Meanwhile,we also explore its development from theory and practice these two aspects.Firstly,this paper adopts the idea of system engineering,which is based on the process of prefabricated component flow-production,transportation,stacking,installation and connection.According to the quality formation,the assembly concrete construction process is divided into three stages: prefabricated component production,logistics transportation and assembly construction.And then combined with the three-stage quality control principle and process theory of beforehand,concurrent and afterwards.From the production preparation,production process,post-production inspection,transportation and stacking management,assembly preparation,assembly process,the assembly after the acceptance of seven aspects.And uses field research,expert interviews,literature books and standard specifications to identify all the elements of quality impact.On the basis of this,we use the theory of Vague sets to select the importance index,so as to construct the quality evaluation system of the assembly concrete building of the comprehensive system.Then,based on the characteristics of prefabricated concrete construction quality evaluation,this paper adopts COWA operator and G1 method according to the connotation and characteristics of different level indicators respectively empowerment and improves the index weight of scientific objectivity,and combining with the multistage fuzzy comprehensive evaluation method,the stages can fully reflect the construction of the whole process of quality grade.Finally,this paper applies the comprehensive theory of quality evaluation of assembly concrete construction to the engineering practice,and systematically analyzes and studies the construction project of 48 primary schools in Wanda Yacht Industrial Park,Qingdao,and validates the comprehensive The scientific method and the technical route of the evaluation method and the technical route,and obtains the scientific conclusion which is realistic.At the same time,the quality improvement measures and general suggestions are put forward from the aspects of organization,process management,supervision mode,contracting mode and information collaborative management: improve the quality management system,pay attention to process management,strengthen quality supervision,implement EMPC project general contract management model,construct BIM information platform.Based on the research on the quality evaluation and management theory of the whole process of assembly concrete construction,the aim is to construct a comprehensive and systematic index system of quality evaluation of assembly concrete building construction,and use scientific and effective quality evaluation method to construct quality evaluation.It provides theoretical support for government supervision and prefabricated unit and construction unit construction,with a view to improving the quality management level of prefabricated components and construction units,improving the quality of assembly concrete construction and promoting the rapid development of industrialization.And provides a new way of thinking for the evaluation of concrete building construction quality.