Steel arch rib jacking-pushing system and steel arch rib jacking-pushing construction method

Abstract

The invention provides a steel arch rib jacking-pushing system and a steel arch rib jacking-pushing construction method. By means of the steel arch rib jacking-pushing system and the steel arch rib jacking-pushing construction method, the safety risk caused by arch rib high-altitude hoisting operations is effectively reduced, the arch bridge construction efficiency is improved, and large lifting equipment, bridge position supports and other ancillary works are reduced, so that the project investment is saved. According to the steel arch rib jacking-pushing system and the steel arch rib jacking-pushing construction method, arch feet at the two ends of a steel arch rib are provided with a left-side splicing jacking-pushing platform seat and a right-side splicing jacking-pushing platform seatwhich are used for splicing steel arch rib prefabricated segments, the top ends of the left-side splicing jacking-pushing platform seat and the right-side splicing jacking-pushing platform seat are fixedly provided with slideway beams, the top faces of the slideway beams are consistent with a steel arch rib bottom contour curve, and jacking-pushing devices and stopping-pushing devices which act on the steel arch rib segments are arranged, a plurality of points between the left-side splicing jacking-pushing platform seat and the right-side splicing jacking-pushing platform seat in the direction along a bridge are provided with temporary piers, the pier tops of all the temporary piers are provided with sliding or rolling devices acting on the bottom faces of the steel arch rib segments, andacting points of the sliding or rolling devices are located below ventral plates on both sides of the steel arch rib segments.

Description

technical field [0001] The invention relates to a bridge construction device and a construction method, in particular to a system for tangentially pushing an arch rib along a curve and an installation method for the arch rib. Background technique [0002] The jacking method is mostly used in the construction of constant-section continuous girder bridges and cable-stayed bridges. The beam body is poured or assembled section by section at the bridge head, and the jack is pushed longitudinally to make the beam body pass through the temporary support points on the top of each pier. The jacking method has the advantages of high construction efficiency and less space interference to the lower part of the bridge. It is often used in the construction of straight bridges, and the jacking operation is in the horizontal plane. [0003] For arch bridges with arch ribs as the main stress, the arch ribs are spatially curved components, and the current construction methods mainly include ...

AI Technical Summary

Problems solved by technology

The bracket assembly method needs to set up temporary brackets under the arch ribs. The construction period is long, the amount of steel used for the arch frame is large, and the workload of erection and dismantling is large. It is suitable for bridges with small spans and shallow water areas; The tall tower is equipped with a large-tonnage cable hoisting system. Segment hoisting and splicing are all high-altitude operations, with high safety risks and a large amount of temporary work. It is suitable for medium and large-span steel arch ribs (especially steel pipe concrete arch bridges or The construction of the swivel method also needs to set up low-level brackets and swivel towers. The horizontal rotation needs to be equipped with a turntable, and the vertical rotation needs to be equipped with temporary hinges and other structures. The half-span arch rib is separated from the support, and the arch rib is placed in place by horizontal or vertical rotation, and then the closing section is hoisted. The swivel method has many construction steps and high risks in the swivel process

Images