The invention belongs to the technical field of
arch bridge construction, and relates to a steel box
arch bridge arch rib segmental vertical rotation structure and a construction method, the steel boxarch bridge arch rib segmental vertical rotation structure comprises a horizontal rotating
system used for completing arch rib plane rotation and a vertical rotating
system used for completing lifting and lowering in an arch rib
vertical plane; the horizontal rotating
system comprises a lower
rotating disc, a horizontal rotating system, an upper
rotating disc and a
traction system; the arch rib is divided into an upper section arch rib and a lower section arch rib; the vertical rotating system comprises an integral arch rib vertical
rotating hinge used for fixing the lower section arch rib, asection arch rib vertical
rotating hinge which is installed at the joint of the upper section arch rib and the lower section arch rib, a buckling cable, a buckling
tower and a rear anchoring system.A lifting
tower frame and a lifting cable which is arranged on the lifting
tower frame and is used for controlling the upper section arch rib are arranged below the upper section arch rib; a balance cable is installed between the inner side of the upper portion of the buckling tower and the outer side of the upper rotary disc, and the problems that existing valley
terrain arch rib vertical rotation construction is limited by
terrain, the height of an assembled support is large, material labor input is large, arch rib vertical rotation lifting loads are large, and construction safety risks arelarge are solved.