A pipe threading trolley and pipe threading method for the construction of box girder prestressed tunnels

Abstract

The invention provides a trolley for threading and pulling out pipes for the construction of prestressed tunnels in box girders, including a chassis, a pipe threading and pulling mechanism, a working platform, a lifting mechanism and a reel mechanism. Move to the position of the threading and pulling tube, adjust the lifting mechanism, the lateral movement cylinder and the longitudinal movement oil cylinder in the threading and pulling mechanism to make the roller assembly align with the position of the pre-piercing and pulling tube, and then the driving roller and the clamping roller in the threading and pulling mechanism Clamp the pre-threaded rubber hose, turn on the motor of the driving roller, and start to thread and pull the hose. The reel mechanism is used to place the pre-threaded rubber hose and smooth and stack the pulled out rubber hose. The pipe threading and pulling trolley can realize the functions of automatic pipe threading and pipe pulling, and at the same time, it can automatically straighten out and stack the rubber pipes. The pipe threading and pulling method has high efficiency, high quality, saves manpower, and reduces construction time.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a pipe threading and pulling trolley used for box girder prestressed tunnel construction and a pipe threading and pulling method. Background technique [0002] The application of prestress on the box girder can reduce or offset the positive and negative bending moments and the load generated by the self-weight of the box girder, and improve the bearing capacity of the box girder. Strand tension is achieved. During the construction of the prefabricated box girder, the prestressed channel is formed by pulling and pulling the rubber tube on the box girder. Specifically, when the steel frame of the box girder body is bound, the positioning net designed according to the prestressed channel is bound to the steel frame, and then according to the positioning The position of the net is piped. After the pipe is completed, the concrete is poured. After the concrete reaches a ce...

AI Technical Summary

Problems solved by technology

[0003] At present, the pipe threading operation of prefabricated box girders is usually completed by a semi-automatic pipe threading machine, but the semi-automatic pipe threading machine requires the cooperation of three people, two of whom straighten the rubber hose and transport it to the pipe threading machine, and the other remotely operates the pipe threading The machine is pulled and guided in the front. Due to the messy stacking of the reused rubber hoses, the rubber hose parts overlap each other, which is difficult to straighten out. The work intensity is high. Generally, it takes about 3 hours for a single-hole box girder rubber hose to wear the hose, and it takes a long time to wear the hose.

[0004] The pipe pulling operation of the prefabricated box girder uses the hoist to pull the rubber hoses, and two hoses can be pulled at a time, but the damage to the rubber hoses during pulling is relatively large, and the diameter of the rubber hoses is likely to become thinner, and the rubber hoses are easy to pull out, posing a safety hazard. Moreover, after the rubber hose is pulled out, workers need to stack the pulled out rubber hose, and the stacking is messy

In addition, the existing tube extubation machine can also be used for extubation. The existing extubation machine uses chains to hold tiles and staggered extubation, which has poor synchronization and greater damage to the rubber hose, and there is no rubber hose stacking device.

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