Key Technology Of Double Prestressed Concrete Bridge Construction Offshore

This paper relies on Dalian Xinghai Bay Bridge West Approach, a comprehensive study of he key technologies of offshore construction of prestressed concrete double bridges, temporary works design and construction and the main project, the analysis principle related technology, research construction methods and summarizes relevant construction.The first chapter analyzes and summarizes the development situation at home and abroad in recent years, Bridge, double double cross-sea bridge and the bridge, and introduced China’s first cross-sea bridge double road, namely Dalian Xinghai Bay Bridge project background and technical Difficulties selected research content and technical route;Chapter Ⅱ study of bare rock longest cross-sea bridge district temporary trestle in the design and construction of key technologies, through economic comparison, select the most reasonable design, the research value of the main parameters of the finite element analysis of the structure of the subject force and the overall stability, and finally developed three kinds Uncovered Rock area of steel pipe pile construction method and successful practice, a comprehensive summary Uncovered Rock area off the trestle design and construction of key technologies;The third chapter studies the key technologies offshore construction pile in karst region, focusing on exploring offshore construction method Uncovered Rock and Steel casing sinking, and the first derived a mathematical formula for calculating the height of the sea surface slurry made for different soil Pile Foundation Construction liquid mud height provides computing principle;The fourth chapter studies the sea water is not high pile load desk steel box design and construction of key technology, through program selection, reasonable structure selected parameters of Steel Boxed design and calculation values, and the use of finite element carried Steel Suspension when the box structure static analysis and dynamic process analysis, to explore the fundamental mechanism and modal steel Boxed structure studied for offshore wind and waves pile platform hanging Box for key technologies;The fifth chapter studies the superstructure off the coast of Key Techniques for Construction of Double Bridge, focusing Exploration pier, the crossbar, select the beam, double box girder construction of key technologies, support structure system and construction of large marine engines. By studying the above, the key technology in offshore double bridge construction will be a comprehensive summary and provide reference for similar projects.