Research On Quality Management Of Metro Tunnel Segment Precast Construction

In recent years,precast construction has received increasing attention.With the advantages of high degree of industrialization,fast construction speed and good product quality,precast construction has been rapidly popularized and widely applied in China.The traditional construction industry is experiencing a revolution,problems exsiting in the previous quality management such as insufficient quality control and delay of information transferring needs be solved.Information techonology has provided an efficient tool for engineering quality management.Firstly the thesis introduces the connotation,characteristics and main advantages of precast construction,as well as makes a comprehensive analysis of the difference between precast and traditional construction.Taking the construction of metro tunnel segments as an example,the precast construction process and key techniques have been introduced.Based on that,the thesis conducts the discussion on the metro tunnel segments precast construction quality management system,which includes quality formation,quality standard system,quality control organization and quality control point set.Also,the modeling approach and data structure of segments precast construction quality model have been studied.Through linking scheduling data to BIM model of segments,a 4D dynamic schedule model can be built,which constructed a 5D quality model with aggregation of POP quality data including codes and standards.Then the segments precast construction quality management method is proposed,which combines the self-control by contractors,supervision by supervision units and quality control by government administration department.Finally through a case study of Wuhan metro project case,the application of quality management method based on information technology has been demonstrated to help improving segments precast construction quality.