Mountainous area ultrahigh main tower cable-stayed bridge installation method

Abstract

The invention discloses a mountainous area ultrahigh main tower cable-stayed bridge installation method which comprises the steps that a wall-attached crane is arranged on a main tower, and an assembling pier top section and a bridge deck crane are sequentially hoisted by the wall-attached crane; after the wall-attached crane hoists the component on the bridge deck, the component is transferred bythe bridge deck girder transporting vehicle, and a transfer platform is additionally arranged at the sidewalk position of the bridge deck and used for the bridge deck girder transporting vehicle to receive a temporary parking point where the wall-attached crane is lifted to a bridge deck steel beam; bridge deck transferring: the bridge deck precast slabs and the sidewalk integral structure are transported to the front of a bridge deck crane through the lower part of the bridge deck crane, and the beams are taken and erected in front of the bridge deck crane; bridge segment components are hoisted and erected; and pouring a wet joint is poured and a corresponding stay cable is tensioned every time two sections of steel structure beams are erected, the wet joint is maintained to be equal instrength, and then the next round of hoisting erection is carried out until the whole bridge is completely installed and erected, so that the problems that the construction site is insufficient, the deck crane is complex to install, and construction equipment interferes with the stay cable under the special conditions of the stay cable can be solved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for installing a superhigh main tower cable-stayed bridge in mountainous areas. Background technique [0002] At present, for composite girder cable-stayed bridges, on-site installation is generally divided into two installation processes: overall hoisting and loose assembly. For composite girder cable-stayed bridges in mountainous areas, there are often cliffs, deep ditches, and canyons in the terrain of the bridge site. During construction, it is generally divided into main processes such as beam lifting in the tower area, bridge deck transfer, hanging erection, cable tensioning, and wet joint pouring; the beam lifting in the tower area is generally hoisted by wall cranes, tower cranes, and trusses. However, for super-high cable-stayed bridges, due to the high hoisting height of the lifting girder, the hoisting operation surface is single, the hoisting pro...

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Problems solved by technology

[0002] At present, for composite girder cable-stayed bridges, on-site installation is generally divided into two installation processes: overall hoisting and loose assembly. For composite girder cable-stayed bridges in mountainous areas, there are often cliffs, deep ditches, and canyons in the terrain of the bridge site. During construction, it is generally divided into main processes such as beam lifting in the tower area, bridge deck transfer, hanging erection, cable tensioning, and wet joint pouring; the beam lifting in the tower area is generally hoisted by wall cranes, tower cranes, and trusses. However, for super-high cable-stayed bridges, due to the high hoisting height of the lifting girder, the hoisting operation surface is single, the hoisting process takes a long time, and the hoisting equipment is used very frequently; The hoisting and assembly of the crane will be extremely cumbersome and the construction efficiency will be low; for cable-stayed bridges with special conditions for the main truss cable-stayed cables, the transfer of the bridge deck components and the bridge deck crane should be carried out under the condition of avoiding interference with the installed cable-stayed cables. The requirements for the tail rotation of the aircraft are further improved

To sum up, the installation of super-high main tower cable-stayed bridges in traditional mountainous areas has shortcomings such as narrow component transfer and storage space, high performance requirements for lifting equipment, concentrated construction work areas, low construction efficiency, and greater climate impact.

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