Synchronous Construction Technology of Suspender Anchorage Beam and Cantilever Casting Section
At present,in the beam-arch composite bridge structure using the"first beam and then arch"method,due to the need for the anchoring of the suspender,concrete beams are mostly set up on the flange of the beam body,but the beam structure and the cantilever casting section cannot be synchronized.Corresponding,resulting in problems such as the concrete of the beam segment cannot be poured synchronously,and the hanging basket system cannot be moved forward due to obstruction.Based on a continuous steel arch bridge project,the local push-pull improvement and optimization of the hanging basket side formwork structure is carried out.The hanging basket side formwork structure located in the beam area is adjusted to three formwork structures with push-pull combination,which is supported by additional support longitudinal beams.The steel formwork is added to the truss structure as the side formwork and bottom formwork of the beam,and the pulley is used to realize the lateral movement of the structure.This technology realizes the switching of the formwork in the beam area,the synchronous pouring of the suspender anchoring beam and the cantilever casting stage,and the barrier-free longitudinal movement of the hanging basket system,which solves the problem of synchronous pouring of the beam segment,shortens the segment cycle and reduces the frequency of hanging basket installation and disassembly.
bridgescantilever beamcrossbeamhanging basketcombination templatepush and pullconstruction
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