Application Research On Construction Controlling Of The Curve Continuous Rigid Frame Bridge

With the rapid development of our national transportation and the improvement of bridge building technology, the bridge building turns out to be more large-span and high-tech, and prestressed concrete continuous rigid bridge holds a dominant position for its advantage of high strength, crisp lines, simple and quick construction, and strong leaping ability during the 100-300m span bridges. Large-span prestressed concrete continuous rigid bridge construction usually adopts symmetric cantilever casting method and is a complicate construcyion process, during which the catual state of the bridge turns out to be an aberration from the theoretical calculation state due to many idntified and unidentified influencing factors. Therefore, the bridge construction controlling is indispensable in order to guarantee the quality and security of bridge building, to ensure the alignment and structural internal forces of continuous rigid bridge meet the designed requirement and to make actual state of continuous rigid conform to the designed state as much as possible.The curve continuous rigid frame bridge integrated with the characteristics of the curve bridge and the continuous rigid frame bridge. Therefore, set the lofting elevation and calculation the pre-camber will be more complicated in the control of the calculation process. In this paper, using finite element structural analysis software of the Midas-Civil to analysis the characteristics of the deformation (vertical deformation; horizontal deformation; torsion deformation),the force and the calculation control method of the curve continuous rigid frame bridge with the engineering program. According of the calculation process-control of elevation to provide a scientific basis.In the first place, based on the project of Guizhou Ma Ling River Bridge, the contene, method and basic principle of large-span continuous perstressed concrete rigid bridge construction is expounded. And a suitable construction control program is given in this paper. By establishing calculating model for Liang-Ji Canal Bridge construction, the construction process is analyzed and the change in stress and displacement of key cross-section is controlled effectively and is coMPared with actual measured results, during which reliable data is provided to construction control work.