Study On The Construction Control Techniques Of Long-span Prestressed Concrete Continuous Rigid-frame Bridge With Small Horizontal Radius

Based on the HeiYaGou 2 super-large bridge for engineering background, adopt bridge calculation software "MIDAS" Civil/scrubber-ash of long span, small curve radius of prestressed concrete continuous rigid-frame bridge cantilever construction stage, closure, second shop bridge stage, stage of creep and shrinkage of stress and strain simulation calculation, and through the measured value and the coMParison of simulation calculation indicates that, when the success of the construction control better guidance.In the model, because the bridge design line 805m for small curve radius, deck cross-sectional slope for 4%, deck cross-sectional slope through the elevation b.underplatform flanks around to adjust, "MIDAS" Civil/no, this section by section ATUO CAD draw, generating DXF file size, Civil, and "MIDAS"/"MIDAS" section of the Civil/cabin stored sectional characteristic value of characteristic.According to plan a pier construction date do adjustment stage of construction, establish the continuous girder beams considering each construction stage 4:the slip, binding rebar and concrete casting, prestressed tendon. Modeling in transverse prestressing tendons, when checking in PSC reinforced concrete shear stress (vertical prestressed reinforcement) and. And the Civil/to hanging basket "MIDAS" in accordance with the heaviest beam (2nd beam), stress, strain and stability checking (buckling analysis).Through the construction process of linear and stress monitor measuring, each construction stage of linear and stress in the control range, the construction control is good.