Method for erecting girder of suspension bridge by double-hoisting hydraulic NC (numerical control) cable crane

Abstract

The invention discloses a method for erecting a girder of a suspension bridge by a double-hoisting hydraulic NC (numerical control) cable crane. The invention is characterized in that: two sets of loaded-walking hydraulic NC cable cranes and a control system are used in a combined manner to sequentially hoist a section of girder of the suspension bridge at the same time so as to erect the girder of the suspension bridge; the two sets of loaded-walking hydraulic NC cable cranes are loaded to carry the girder to complete the erection when the girder of the suspension bridge is erected from the tower end to the downslope part at the midspan; the cable cranes are loaded to carry the girder to complete the erection of a gentle section when the section of the girder is erected from the midspan to the two banks; and the two loaded-walking hydraulic NC cable cranes automatically swing to carry the girder to complete the erection when the cable crane walks to the upslope sidespan with high gradient. The method for erecting the girder of the suspension bridge by the double-hoisting hydraulic NC cable crane is applicable to mountainous areas, shoals and other places where the bridge erecting construction requirement for horizontally carrying the girder of the suspension bridge to the designated erecting position cannot be met.

Description

Technical field: [0001] The invention relates to a long-span suspension bridge mechanized construction equipment and a construction method, in particular to a suspension bridge main girder erection equipment and a construction method for erecting the suspension bridge main girder which can solve the horizontal transportation of the suspension bridge transverse truss main girder section. Background technique: [0002] The cable-spanning crane is the "special equipment for erecting the main girder of the suspension bridge". After continuous improvement and perfection for a hundred years, it has become the safest and most reliable beam-erecting equipment. At present, the single lifting capacity of the cable-spanning crane has reached 500t. The main girder erection method is to use a single-machine single-hang hydraulic spanning cable crane. The function of this single-machine single-hanging spanning cable crane is only vertical lifting. Use steel wire rope to pull and swing, th...

AI Technical Summary

Problems solved by technology

[0003] As the span of suspension bridges becomes larger and larger, there are many inconveniences in the construction method of erecting the main girder of suspension bridges using single-machine single-hang hydraulic span cranes: 1. The hoisting section length is short, the total number of sections is large, and the construction period is long; 2. Using When the beam is hoisted by a single crane, the working stability is poor, and the main girder is prone to torsion and lateral deviation. If the hoisting process encounters a strong wind, the safety of the beam section will be difficult to guarantee; The need for bridge erection construction from the truss main girder section to the designated main girder erection position: With the continuous development of China's transportation industry, the terrain of the bridge to be erected is complex, especially for suspension bridges erected in shallow mountainous areas and other places, the main girder section of the transverse truss of the suspension bridge The horizontal transportation of the horizontal truss of the suspension bridge (that is, the transportation of the main girder section of the transverse truss of the suspension bridge to the bottom of the bridge to be erected) is very difficult, which seriously affects the erection of the main girder.

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