The Technology Of Rectification On Gushan River No.11 Bridge

In view of the medium span bridges deviation problem that is widespread but often overlooked, as the supporting project for Gushan River No.11 Bridge in Shaanxi Province, combining theoretical analysis with implementation monitoring, this paper has studied the deviation disease, deviation cause and the measures of the repairing and preventing deviation of the bridge and has concluded the following conclusions:Firstly, based on the systematic research of the bridge deviation disease, this paper has analyzed the reason about the deviation of the supporting project- Gushan River No.11 Bridge(The Curve Beam Bridge), and studied the main factors and the degree of the bridge.And because of the jammed expansion joint that limits the extension of beams but has nothing to do with shortening of beams, which will lead to the creep of beams under the impact of temperature as well as the large increasing of deviation amount. The problem stated above is especially obvious to curved bridges.Secondly, as an example for the supporting project, this paper has discussed the method of establishing numerical model for lifting and rectifying the bridge. On this basis, this paper has completed the simulation analysis of the lifting and rectifying construction with the supporting bridge and ensured the safety and feasibility of the construction in theory.Thirdly, this paper has analyzed the beam lifting on situation without interrupting the traffic, completed the process of the implementation and monitoring and verified the feasibility of the construction method.Fourthly, combined with the simulation analysis, this paper has presented the monitoring method of the lifting and rectifying construction for the supporting bridge and completed the monitoring. The monitoring data has proved that the method of analysis and implementation are feasible.Fifthly, combined with the analysis, this paper has put forward the measures of preventing bridge deviation.Finally, according to the research results, this paper has provided "The Technical Guide of Bridges Rectification".