The High-speed Railway Simply Supported Box Girder Prefabrication Process And Its Key Technology Research

In today’s high-speed railway passenger line projects, prefabricated simply supported box girder has been widely used. Reasonably effectively improve simply supported box girder construction quality and efficiency of prefabricated, for the development of high-speed rail is important. This paper describes the current application of the high-speed railway bridge departure, combined with examples of the Beijing-Shijiazhuang railway passenger dedicated line construction commenced discussion. The article summarizes the high-speed railway passenger line bridge construction is now completed our organizational experience, combined with the results of the current study abroad related professionals, analysis of high-speed railway construction program simply supported box girder, the systematic introduction of prefabricated construction technology simply supported box girder for various aspects of construction elements, made effective and reasonable construction quality control measures.At the same time modern railway engineering from a technical point of view, analyzes the key technology of large prefabricated simple box girders, such as box beam creep camber control, the application of high performance concrete box beam technology, etc., as well as common quality problems and countermeasures. Also important variable camber control, and further explore the box girder Creep observation and control of technical measures for high-speed rail in prestressed concrete box beam Xu; important for the future development of high-speed railway construction has precast box girder.