Double Conjoined Single Tower Cable-stayed Bridge Construction Control Technology

Based on summing up construction controlling technology of cable-stayed bridges of home and abroad, taking QingDao DanShan cable-stayed bridge as project background, this paper has a particular study to the construction controlling for the twin-united body one pylon cable-stayed bridge. Combining with the performances of DanShan bridge, discussing the methods on the construction controlling and calculation of cable-stayed bridge, this paper raises an efficient construction controlling system, and realizes collecting construction data of the real bridge and technical information. By analyzing on the difference of theoretical calculation and real construction state, the author determines to take self-adapting construction controlling method which uses Kalman filter method to identify and adjust construction parameters. By getting rational construction state from forward iteration method, this paper, taking concrete creep effect in consideration, raises a rational scheme to pre-remain deformation and adjust cable force.The paper verifies that the self-adapting construction controlling is a good method among the existing ones of the cable-stayed, and that Kalman filter method can forecast the cable-stayed construction proceed efficiently. The successful application to the QingDao DanShan cable-stayed bridge verifies that the monitoring and controlling method raised in this paper is practicable and get good controlling effect.