Method for hoisting construction girder sections through cables

Abstract

The invention relates to the field of bridge construction and discloses a method for hoisting construction girder sections through cables. The method includes the steps: erecting a first main cable, a second main cable and a plurality of booms; taking a region at the bottom of each boom to arrange a hoisting device below the first main cable and the second main cable; transporting a to-be-mounted girder section to a hoisting position, and adjusting the to-be-mounted girder section to be perpendicular to the mounting direction; selecting one mounting region with no to-be-mounted girder section, enabling the hoisting device to move above the current mounting region after longitudinally hoisting the to-be-mounted girder section to a position 1-2m above a bridge deck, horizontally rotating the to-be-mounted girder section by 90 degrees, placing the to-be-mounted girder section at a designed elevation, and fixing the to-be-mounted girder section to the current mounting region and the bridge deck to form a mounted section. By adoption of the method for hoisting construction girder sections through cables, manufacturing cost can be reduced, arrangement of a girder section hoisting platform in a main span is avoided, and normal operation of a river channel is guaranteed.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a method for hoisting and constructing main beam segments by cables. Background technique [0002] When building a bridge on the water surface, due to the water environment below, the main girder segment is often transported to the bottom of the point to be erected by barge, and then the main girder is vertically lifted to the installation point by a cable crane for installation. [0003] When building a suspension bridge in a mountainous area, due to the limitation of terrain conditions, the stiffened beam cannot be transported to the bottom of the point to be erected. Usually, it is necessary to install a double-cable crane on the outside of the main cable, and set up a lifting platform between the main spans. The stiffening beam is placed on the lifting platform, and then the stiffening beam to be installed is lifted from the lifting platform by a cable crane, and the stiffe...

AI Technical Summary

Problems solved by technology

[0005] (1) During the construction of suspension bridges in mountainous areas, it is necessary to set up a stiffened beam hoisting platform in the main span. When the terrain conditions are relatively harsh, a large steel structure platform needs to be set up. The construction of a large steel structure platform requires a large amount of structural work; the cable crane is arranged outside the main cable , it is necessary to set up a large pole beam system to hoist the stiffening beam, the construction structure of the large pole beam system requires a large amount of construction work, and the construction cost is relatively high

[0006] (2) When erecting the stiffening beam to be installed by double-cable cable crane, the load-bearing cable of the cable crane is installed on the outside of the main cable. It is necessary to widen the transverse width of the main tower of the bridge, expand the main structure of the bridge, and increase the manufacturing cost. cost

[0007] (3) When barges are used to transport the main girder section, the channel needs to be occupied, which affects the passage of the river

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