Research Of Construction And Monitoring Technology In External Prestressed Continuous Rigid Frame Bridges

Prestressed concrete continuous rigid frame bridge with its construction is simple, cost economy, reasonable force, comfortable journey to our unique advantages in recent years have been rapidly rising. However, with extensive use of this bridge, many of large span continuous ridge frame bridge widespread produce cracks in the webs and deflections in the middle of span.This have threated to the continuous rigid frame bridge normal.use. The large span continuous rigid frame bridge is designed with a new prestressed system——the internal and external prestressed technique.Make full use of the advantages of external cable can be replaced and repeat Tension, in order to solve or alleviate the current problems.This paper regard the Chong Qing Xitan bridge as an example.The technology of external prestressed are discussed in the application of the bridge structure and development.By the technology of external prestressed was successful application of in the Xintan bridge.Research of the internal and external prestressed technique in the large span continuous ridge frame bridge.Combined with the background projects,do a detailed analysis for the every technology of external prestressed. Meanwhile, external prestressed in the successful implementation of this project. Summarized external prestressed construction technology, construction monitoring of the key technologies, technical and economic indicators.From the many studies in large span prestressed continuous rigid frame bridge of. external prestressed technology.Research results of this paper reflects well the actual situation of this background projects and it would be available for reference for the construction of identical kind of bridge.