Calculating method of arch rib installation alignment of large span cable hoisting arch bridge: Fid-Bau Portal

Calculating method of arch rib installation alignment of large span cable hoisting arch bridge

Xiong, Shaohui / Chen, Wei / Wang, Feng

The cable hoisting method is the most important construction method for long-span arch bridges. During the hoisting process of the arch rib, the incomplete consolidation of the segment joint due to the temporary connection of the bolts, the deflection of the tower caused by the temporary construction load of the main cable, and the free expansion and contraction of the anchor cable and the buckle caused by the temperature change will all affect the arch rib. The installation line has a greater impact. In this paper, the double-element model calculation method considering the stiffness loss can be used to calculate the correction value of the arch rib installation line more accurately when considering the incomplete consolidation of the arch rib segment joint; the geometric relationship between the cable and the tower is used to deduce the tower The correction calculation formula for the installation alignment of the deflection of the frame and the free expansion and contraction of the anchor cable and the buckle caused by the temperature change is calculated to calculate the correction value of the installation alignment of the arch rib due to the deviation of the tower and the temperature change of the anchor cable and the buckle; A calculation formula for the installation line shape of the arch rib of a largespan cable hoisting arch bridge is proposed, which comprehensively considers various influencing factors. The installation line shape of the arch rib is calculated. Taking the Yunnan Lancang River Bridge as an example, the arch line shape error meets the specification requirements. This article can provide a useful reference for the linear calculation of the arch rib installation of the cable-mounted arch bridge.