Construction Technology Optimizationand Quality Control Research About Cantilever Pouring Of Large-span Prestressed Concrete Continuous Beam

Large-span prestressed concrete continuous beam cantilever pouring technology is widely used in high-speed railways in China,but large-span prestressed concrete continuous beam bridges have problems such as easy deformation,so it is important to ensure the stability of the bridge body and strengthen quality control.Although China's continuous beam bridge construction technology and quality control theory and technical level have achieved rapid development.However,due to the increasing complexity of the current bridge structure,there are many influencing factors in the construction process,which put forward higher requirements on the construction technology and quality control level.With the rapid development and wide application of BIM and intelligent,automation and information technology in the field of engineering construction,how to comprehensively apply BIM and intelligent,automation and information technology in the construction process of large-span prestressed concrete continuous beam cantilever pouring to optimize the construction process and To improve the construction quality,which puts forward new requirements for managers.This paper takes Shunyi Bridge as the research object,and studies the optimization scheme of large-span prestressed concrete continuous beam cantilever pouring construction technology based on BIM and intelligent,automation and information technology,and then this paper puts forward measures and suggestions to strengthen construction quality control.First of all,this paper describes the key technologies involved in the continuous beam cantilever pouring technology of the Shunyi Bridge including design and check calculation of the bracket,0 # block preloading,hanging basket assembly,cantilever segment linear monitoring and closure section construction,which points out the necessity of optimization based on BIM and intelligent,automation and information technology and the urgency of further strengthening construction quality control.Secondly,in the construction process of the continuous beam cantilever pouring of the Shunyi Bridge,this paper uses BIM technology to optimize the arrangement of the steel bars and transverse prestressed pipelines on the top of the continuous beam pier,to achieve fast and accurate positioning of the installation space.And the problem of incompactness and ribbing was solved through the porous fixed-point vibration of the concrete.The use of prestressed intelligent tension grouting technology has realized the intelligent and automated operation process of related equipment,which has greatly improved the actual work efficiency.The use of high-altitude continuous beam automatic spray curing technology has effectively improved the curing quality of concrete and reduced the waste of water resources.The use of linear monitoring information technology through Bluetooth connection has realized effective connection with electronic level,comprehensive data collection,and full-line monitoring adjustment and problem handling.Finally,on the basis of determining the construction quality control points of the large-span prestressed concrete continuous beam cantilever casting project,specific quality control measures are proposed from the construction preparation stage and the construction stage.Then this paper puts forward specific suggestions for quality control from the aspects of establishing organization,improving system,strengthening quality awareness,correctly handling the relationship between quality,schedule and cost and establishing a comprehensive,active and dynamic construction quality management mechanism.The technical optimization plan and quality control measures and suggestions put forward in this paper can improve the construction efficiency and construction quality management level of other similar projects to avoid the occurrence of adverse events and provide reference and reference.