Single-beam bridge erection machine, and girder erection method, hole erection method and tunnel-through method thereof

Abstract

The invention discloses a single-beam bridge erection machine, and a girder erection method, a hole erection method and a tunnel-through method thereof. The single-beam bridge erection machine comprises a two-span main beam, a front hoisting overhead crane, a rear hoisting overhead crane, a main supporting leg, a middle supporting leg, a rear folding supporting leg, a rear wheel group supporting leg and a rear walking supporting leg, wherein the two-span main beam adopts a single-box structure and meets two-span arrangement along a bridge construction direction; the front crotch lower part ofthe two-span main beam is provided with a rail to support the main supporting leg to longitudinally move; the middle part of the two-span main beam is provided with a flange connected with the middlesupporting leg; the tail part of the two-span main beam is provided with a flange which is independently connected with the rear wheel group supporting leg and the rear walking supporting leg; the tail part of the two-span main beam is connected with the rear folding supporting leg through a hinged shaft; and a web on the rear crotch fixed point position of the two-span main beam is cut with a hole to supporting the front hoisting overhead crane and the rear hoisting overhead crane. The single-beam bridge erection machine can lower height to be favorable for passing through a tunnel.

Description

technical field [0001] The present application relates to the technical field of bridge erecting machines for bridge construction equipment, in particular to a single girder bridge erecting machine and methods for erecting girders, passing through holes, and passing through tunnels. Background technique [0002] The bridge erecting machine is a device used to place prefabricated girders on prefabricated bridge piers. Bridge erecting machines fall into the category of cranes because their main function is to lift beams, transport them into position and then lower them down. But the bridge erecting machine is very different from the crane in the general sense. The conditions required by the bridge erecting machine are harsh, and there is walking on the beam, or longitudinal movement. There are several types of bridge erecting machines, such as highway bridges, conventional railway bridges, and passenger-only railway bridges. [0003] It is very common for bridge erecting ma...

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Problems solved by technology

[0004] In the prior art, some bridge erecting machines use larger O-shaped legs, and some use an integrated frame-transporting machine. Although the beam erection can be completed, the O-shaped legs cannot complete the beam erection condition at the tunnel entrance, while the integrated frame-transporting machine High fuel consumption, low efficiency, and high pressure on the beam surface

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