A method for erecting juxtaposed box girders in tunnels

Abstract

The invention discloses a method for erecting parallel box girders in a tunnel. The method comprises the steps of making a bridge girder erection machine pass through the tunnel, wherein the bridge girder erection machine is conveyed to the position of the entrance of the tunnel by a girder transporting vehicle through two supports; placing the bridge girder erection machine in position, adjusting the height of the bridge girder erection machine to be matched with the height of the tunnel, making the height of a rear supporting leg, the height of a middle supporting leg and the height of a front supporting leg increase gradually, and making the surface of the bridge girder erection machine incline upwards horizontally; conducting girder feeding through the girder transporting vehicle; lifting the first box girder through the bridge girder erection machine; finishing girder feeding through the bridge girder erection machine; lowering and horizontally moving the first box girder through a front girder carrier and a rear girder carrier; taking the second box girder through the bridge girder erection machine in the same way and conducting lowering and horizontal movement of the girder; finishing girder erection. According to the method, due to the fact that the bridge girder erection machine is adopted to erect the parallel box girders in the tunnel, time is saved a lot, cost is reduced, erection of the first hole box girders with cast-in-place required in the prior art is achieved safely and smoothly, the difficulty of erecting the first hole parallel box girders in the specific tunnel-bridge connection environment is reduced, and construction safety and construction quality are guaranteed.

Description

technical field [0001] The invention relates to the field of bridge and tunnel engineering construction, in particular to a method for erecting and arranging box beams in a tunnel. Background technique [0002] Existing bridge erecting machines are mainly used for highway bridge erection, conventional railway track bridge erection and passenger-only railway bridge erection. For bridge erection projects connecting bridges and tunnels, since there are few or no roadbeds on both sides of the tunnel entrance, it cannot meet the existing requirements. Therefore, due to the inconvenience of transportation, the existing method of completing the first hole and juxtaposing the box girder, such as the full hall support method and the steel tube Bailey beam support method, etc. , the cast-in-place method is to bind the steel skeleton first, and weld the steel bars of the next section in one section of concrete. After the early strength of the concrete is formed, the joint surface is ch...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of complex method, long construction period, difficult operation and high cost brought about by the cast-in-place method for the construction of the head hole box girder in the bridge and tunnel engineering existing in the prior art, and provides A method for erecting and arranging box girders in tunnels

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