Key Technologies And Monitoirng For Construction Of Sel-anchored Suspension Bridge

Taking the consturction process of a self-anchored pension bridge as thebackground to research，the key technologies and consturction monitoring areinvestigated in this dissertation. The practical and valuable research achievementshave provided effective technological support to the accomplishment of the bridge.Firstly, a brief introduction is made to the self-anchored suspension structuremechanical characteristics, advantages and disadvantages as well as the design andmonitoring of relevant theory. Then, it focus on the conditions and requirements ofthe bridge, analyzes the difficulties of its construction and control points, and makessomes solutions to the technical difficulties targeted, which is including installation ofsteel box girder, steel cofferdam construction program and the construction programof foundation, tower crane, and capping beam. And then, the appropriatemonitoring program, construction calculation and monitoring tools to the key processof the bridge is made to ensure the completion of the design goals are consistent withthe results achieved certain research results. And it not only provides technicalsupport for the successful completion of the project but also for the engineeringexperience accumulated of construction of these bridge.The main contents and results of the article are as follows:(1) By reading a lot of related information of the self-anchored suspensionbridge construction techniques and monitoring data, the structural characteristics ofself-anchored suspension bridge, the mechanical characteristics and constructionfeatures is clear. Arranging many typical self-anchored suspension bridge andmonitoring data in and out and summarizing the relevant design and control theory,research projects for the program is provided below the theoretical anchor.(2)Taking a bridge as engineering research background, considering theconstruction environment, technical standards and schedule requirements,construction technology programs and monitoring program, monitoring tools is madeto the technical difficulties on the construction of key processes for its engineeringand technical characteristics. (3) Make research on the construction difficult and critical step. After on-sitefield survey in conjunction with the construction process requirements, the steelgirder erection, steel cofferdam of back cover is the construction difficulties while thefoundation, tower, capping beam and suspension is the key step in this project.According to the site’s geological conditions and schedule requirements, The mainbridge steel box girder is adopted to fight loose erection plus traction mode. In thenorth and south sides, the erection of2+1group fight tire rack and1+1group fighttire rack is respectively made from both sides at the main tower erection to close inthe main tower. Steel box cofferdam block manufactured in a factory and the groupmakes up in the field. Under the decentralized device laid by top casing, the overalldecentralization Boxed is put in place. Hanging plug between the bottom plate andthe steel casing gap, and last pouring concrete to form a watertight cofferdam backunderwater by multi-point catheter France.(4) Programs and means for monitoring the bridge construction of difficultiesand key processes are researched. Adaptive control theory is used to monitor theconstruction of the bridge. Finally puts forward a clear monitoring programs andmonitoring methods which use structural analysis software and monitoring tools foranalysis and calculation to the main tower, main beam, the main cable, cable saddle,boom.