Research Of Turning Construction Monitoring Technique For Open Thin-wall Box-stiffer Arch Bridge

Bridge turning construction is a common kind of bridge construction technique. But the open thin-walled boxes technology is a new kind of arch bridge construction technology recently. As a new construction technique, level of turning construction monitoring technique for open thin-wall box-stiffer arch bridge affect development of the technique and construction control is an important part of construction technology, and runs through all stages in bridge construction.Basing on the Ping di-ba turning arch bridge which is the largest span turning bridge constructed by the open thin-walled boxes technology at present in En shi state in Hu bei province. The thesis has summarized the development of the arch bridge, it's construction technology and the importance of bridge construction control, then has introduced project general situation, and has narrated detailed regulation, organization construction, the major work and difficult part of this bridge construction control. The following is the key part of this thesis, firstly, it has introduced the work of early stage, structural calculation and its theoretical result: the absolute altitude of each operating mode, the absolute altitude of building mould in each section and the absolute altitude after pouring concrete;Then, it has discussed the method and content of the line shape control of the main beam, actual absolute altitude of building mould is Put forward, and it has described the method of structural stress monitoring, how to arrange measure Point and collect data, and how to analyze data. It has also narrated the method of rope force detection and structural temperature inspection. Big bridge suit smoothly approach and establish and transport test as well as safe operation for two year, all of these have proved the reasonability of the inspection and its data analysis handling and correctness of construction control. In the final, it has put forward some suggestion and cognition, and has Pointed out existent Problem and develop direction.The successful experience of the bridge construction control, has offered in this report, references for the construction control of the same type bridge in the future.