Overturn-preventing reinforcing structure and method for single-column pier large-curvature steel box girder ramp bridge: Fid-Bau Portal

Overturn-preventing reinforcing structure and method for single-column pier large-curvature steel box girder ramp bridge

CHEN HUI / ZHAO RONGYAO / HUANG WENHUA / ZHU WEIJUN

Abstract

The invention discloses an anti-overturning reinforcing structure and method for a single-column pier large-curvature steel box girder ramp bridge, the anti-overturning reinforcing structure comprises steel pipe columns arranged at the two transverse ends of an independent column pier, the top ends of the steel pipe columns are provided with supporting cross beams, and the supporting cross beams and the bottoms of steel box girders are fixed through rubber supports; the bottom of the steel pipe column is fixedly connected with a foundation platform of the independent column pier. The support is widened through the floor supporting steel column, the floor supporting steel column is connected with the hoop additionally arranged on the independent column pier body to improve stability, the hoop only holds the concrete pier and does not need to be fixed in a drilling and steel bar planting mode, destructive influences on the concrete pier cannot be caused, and on the contrary, reinforcement is conducted; meanwhile, the cantilever arm is flexibly pulled through the steel pull rod and the viscous damper, and it is ensured that the ramp bridge does not overturn.

本发明公开了独柱墩大曲率钢箱梁匝道桥的防倾覆加固结构及方法，包括设置在独立柱桥墩横向两端的钢管柱，钢管柱的顶端设置支撑横梁，支撑横梁与钢箱梁底部之间通过橡胶支座固定；钢管柱的底部与独立柱桥墩的基础承台固定连接。通过落地支撑钢柱加宽支座，落地支撑钢柱通过与独立柱墩身增设的环箍的连接提高稳定，环箍只是抱住混凝土桥墩，而不用钻孔植筋的方式固定，不会对混凝土桥墩造成破坏性影响，反而进行了加固；同时通过钢拉杆、粘滞阻尼器对挑臂进行柔性拉设，确保匝道桥不倾覆。

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