Wide-body steel main girder erecting machine and erecting method thereof

Abstract

The invention discloses a wide-body steel girder erecting machine and a girder erecting method thereof, and relates to the technical field of bridge engineering construction, comprising: a main structure, which includes two oppositely arranged main girders, and the two ends of the two main girders are fixed There is a main beam connecting two main beams; a supporting mechanism, which includes front outriggers, middle outriggers and rear outriggers fixed on the two main beams, and the front outriggers, middle outriggers and rear outriggers are all set There are telescopic devices, which can extend and contract the front outriggers, middle outriggers and rear outriggers; and hoisting devices, which include a crane and a spreader. The spreader is set under the crane, and the crane can be retracted and retracted. The spreader is lowered, and the crane can also move longitudinally and laterally along the bridge. The present invention can realize the efficient, stable and safe erection of wide-body steel girders under the working conditions of existing bridge support space, limited foundation bearing capacity and inability to use large-scale equipment.

Description

technical field [0001] The invention relates to the technical field of bridge engineering construction, in particular to a wide-body steel girder erecting machine and a beam erecting method thereof. Background technique [0002] The first batch of large road-rail bridges in China have gradually entered the maintenance cycle with the continuous growth of service life and the increase of traffic flow. The bridge decks of existing bridges and highways are generally of concrete structure. Long-term use will cause local concrete blocks to be damaged and fall off, causing serious safety hazards to the operation of railway business lines. The replacement of bridge decks has become one of the important contents of this type of bridge maintenance. [0003] New bridge decks usually use long-lived orthotropic steel girder decks (hereinafter referred to as steel girders). Due to the limitations of existing bridge structures and the requirements for installation efficiency, the new steel...

AI Technical Summary

Problems solved by technology

The bridge decks of existing bridges and highways are generally concrete structures. Long-term use will cause local concrete blocks to be damaged and fall off, causing serious safety hazards to the operation of railway business lines. The replacement of bridge decks has become one of the important contents of this type of bridge maintenance.

[0003] New bridge decks usually use long-lived orthotropic steel girder decks (hereinafter referred to as steel girders). Due to the limitations of existing bridge structures and the requirements for installation efficiency, the new steel girders are often divided into larger pieces, and in Affected by various aspects such as railway business lines, road traffic, and waterway transportation during erection, there are problems such as limited support space, foundation bearing capacity, and unusable large-scale equipment, which makes the traditional steel main girder erection method unable to meet the process requirements

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