Construction method for dismantling old bridge by bridge girder erection machine

Abstract

The invention discloses a construction method for dismantling an old bridge through a bridge erecting machine, and belongs to the technical field of old bridge dismantling. The construction method for dismantling the old bridge through the bridge erecting machine comprises the steps of land support erecting, underwater support erecting, bridge erecting machine rail support erecting, box girder blocking, bridge deck wing plate dismantling and box girder body dismantling. Under the condition that a bridge crosses a river or other spaces under the bridge are limited, the bridge can be safely and efficiently dismantled by erecting the bridge girder erection machine, the double-guide-beam bridge girder erection machine is not limited by the spaces under the bridge when being applied to bridge dismantling engineering, a beam body can be hoisted and transferred to a beam transporting vehicle section by section, the safety performance is high, the dismantling weight is large, and the flexibility is high; the device can be widely applied to various beam body dismantling engineering constructions.

Description

technical field [0001] The invention relates to the technical field of old bridge dismantling, in particular to a construction method for dismantling an old bridge by a bridge erecting machine. Background technique [0002] Bridge demolition is a dangerous project, especially under special conditions such as crossing a river, due to the limited space under the bridge, the demolition is more difficult. The traditional bridge demolition generally adopts the steel trestle floating crane, but this method is inefficient and the safety is not guaranteed, and the noise and pollution are generally serious. The silt in the river is deep, the cost of erecting steel trestle is high, the construction period is long, and the river cannot meet the conditions for floating cranes to enter the site. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. For this reason, the present invention prop...

AI Technical Summary

Problems solved by technology

The traditional bridge demolition generally adopts the erection of steel trestle floating cranes, but this method is inefficient and has no guarantee of safety, and the noise and pollution are generally serious

The silt in the river channel is deep, the cost of erecting a steel trestle bridge is high, the construction period is long, and the river channel cannot meet the conditions for floating cranes to enter the site

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