Suspension bridge main span suspension-cable-free beam section mounting method

Abstract

The invention provides a suspension bridge main span suspension-cable-free beam section mounting method. The method includes steps: (1) installing a beam storage slide supporting frame, a cable loading crane, a temporary suspension cable and a temporary stay cable, and guaranteeing that the cable loading crane is positioned at a hoisting position at the front end of the beam storage slide supporting frame; (2) sequentially transferring land and shoal beam sections, a closure section and a suspension-cable-free beam section to the beam storage slide supporting frame; (3) sequentially hoisting the last normal beam section and land and shoal beam section by the cable loading crane; (4) moving the closure section and the suspension-cable-free beam section towards the front end of the beam storage slide supporting frame by a certain distance; (5) transferring the suspension-cable-free beam section to a main tower crossbeam; (6) closing. The suspension bridge main span suspension-cable-freebeam section mounting method has advantages that beam storage supporting frames close to piers are avoided, so that cost saving is realized, and construction safety risks are reduced.

Description

technical field [0001] The invention belongs to the field of installation of the non-sling beam section of a suspension bridge, in particular to a method for installing the non-sling beam section of the main span of a suspension bridge. Background technique [0002] Suspension bridges are widely used in long-span bridges because of their strong spanning capacity, reasonable force, and low cost. [0003] The main girder of a suspension bridge is generally divided into a general beam section, a land and shallow area beam section, a closing section, and a non-suspension beam section according to the location and construction method. The main girder of suspension bridges is usually constructed using the cable-loaded crane method. After the general beam section is hoisted, the beam section without slings is transported by barge to the front end of the storage girder sliding support of the beam section on land and in the shoal area. The beam slides on the support, and then slides...

AI Technical Summary

Problems solved by technology

[0004] This method needs to set up a beam storage bracket for the non-sling beam section next to the main tower, and the support is mostly a high support; At the main cable, it is necessary to walk back to the beam section in the shoal area to hoist other beams after completing the swing of the beam section without slings, that is, the cable-loaded crane needs to run back and forth on the main cable; the cable-loaded crane usually uses the tower top door The components of the cable-loaded crane are directly hoisted from the site on the side of the middle span of the main tower by using the spreader on the mast on the top of the tower. There is no beam storage bracket for the beam section next to the tower, which will have a certain impact on the hoisting of the cable-loaded crane components.

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