The Research Of The Launching Construction Control Technology About The Concrete Skewed Continuous Beam Bridge

With the restriction of construction space and transport condition in the west, the launching construction method has extensive applied prospect, because it need little required equipment and occupy little construction space. the skewed bridge launching is more complex relative than the straight bridge launching, however the launching construction of the skewed bridge didn't be controlled systematically in the past, so the structured stress didn't explicit during the cause of the launching construction and in completion status, the popularization of the skewed continuous bridge's launching construction technology had be restricted. This thesis is taking the concrete skewed continuous beam bridge that construct by launching as subject investigated,studied the control technology of the prestressed concrete skewed continuous beam bridge that construct by launching, this is a branch of western subjects——the new technology of incremental launching and the research on the construction control of long span skewed continuous beam bridge which was leaded by the Ministry of Communications. The major research contents are in the following aspects: 1,Have improved the calculating and analysis of the launching construction by using the ANSYS software, Have gotten the envelope diagram of the inner force and the displacement of the main beam, have offered the theory data for the control of the main beam. 2,Have analysed the stress of the bridge pier, Have gotten the relation between the offsetting and the stress of the bridge pier. have offered the theory data for the control of the bridge pier. 3,Have analysed the bridge skewness influence to the inner force of the main beam. 4,Have analysed the influence of the rigidity ,length and the weight of the nose girder to the main beam, and have expound the altitude settlement of the gap in the front of the nose girder; 5,Have analysed the secondary force by the inaccuracy of the rotation between new beam and old beam and the line shape inaccuracy of beam bottom; 6,Have introduced the specific implementing course of the launching construc-tion control. Including the arrangement of the stress and line measuring point, the lau-nching control,the offsetting control of the bridge pier,the axis offsetting control of the main beam,And have carried out effective controlling work of falling the beam to bearing. The research of this thesis have offered technology guarantee for the populariz-ation of the skewed bridge's launching construction technology in the west, and have offered reference for the launching construction control of the same prestressed con-crete skewed continuous beam bridge.