Abstract:

Abstract:This paper briefly introduces the development of China's prestressed concrete continuous girder bridges from the aspects of bridge design technology, construction technology and stress materials, and focuses on the main problems in the engineering practice of prestressed concrete continuous girder bridges, the reasons for the formation of the sensitivity analysis and design countermeasures to discuss a brief analysis and discussion.

Abstract:The main bridge of Huaihe River Bridge is 50+3×80+50m prestressed concrete continuous box girder, the main design features of this bridge are longitudinal prestressing cables, only top and bottom cables, no web under bending cables, and isolation bearings for braking piers, this paper introduces an overview of the design of this bridge. Conclusion characteristics, prestressing system and closing measures and so on.

Abstract:The main bridge of Zhangjiagang Bridge is a 40+70+40 (m) prestressed concrete continuous box girder structure with a three-way prestressing system, and when the vertical prestressing tendons of block 0 are tensioned, fracture occurs, and this paper analyzes the fracture mechanism through the assumption of the mechanical model, and proposes the construction control countermeasures

Abstract:Pressure dispersed anchor cable structure due to its reasonable force mechanism and in the soft rock and soil body can be more effective to play the soil bearing capacity and provide the advantages of greater anchorage force, in the slope project is increasingly being applied and promoted, this paper focuses on the large tonnage pressure dispersed anchor cable in the basic test of the anchor cable in the slope project of the highway slope project of Yunnan Zhichu to Lengdun.

Abstract:The use of prestressing anchor cable to stabilize slopes is an emerging technology, and is constantly improved in practice, introduces the principle of the process of prestressing anchor cable technology and the scope of adaptation, describes in detail the construction process, the use of safety and quality inspection measures, and through the analysis of the effect of the engineering examples, explaining the use of the technology has obvious advantages.