Research on Key Prestress Construction Techniques of Continuous Box Girder

Abstract

The cast-in-place prestressed concrete continuous box girder is commonly used in the place where the structures are needed to be subjected to long span, heavy loads and complex curves, et al. Combined the prestress theory with engineering practice, this paper focuses on the theoretical elongation and tension of the prestress steel strand and accident prevention and treatment and other key technologies with “dual control” theory to guide on-site construction and with comprehensive ways to verify the theoretical elongation. The prestress concrete construction of Shoujiang Bridge continuous box girder shows that the prestress construction techniques were strictly controlled to ensure the continuous box girder completed and to meet the requirements of the design and specification.