Large-radius circumferential horizontal channel prestressed steel strand penetration device and method

Abstract

The invention discloses a large-radius circumferential horizontal channel prestressed steel strand penetration device and method. The device comprises a first conical sleeve and a second conical sleeve, wherein the first conical sleeve and the second conical sleeve are connected with each other in a threaded manner. A locking mechanism is arranged between the first conical sleeve and the second conical sleeve in a detachably connected manner. The device further comprises a guide steel rope. The two ends of the guide steel ropes are located at a small-diameter end of the first conical sleeve and a small-diameter end of the second conical sleeve. An insertion hole for containing an end of a central wire of a prestressed steel strand to penetrate through is further formed in the second conical sleeve. The large-radius circumferential horizontal channel prestressed steel strand penetration device and method are used for solving the problem that in the prior art, steel strand penetration ina nuclear power plant horizontal circumferential prestressed steel strand channel is difficult to carry out with waste of steel strands; and the device and method are suitable for construction with the requirement for vertical movement during horizontal circumferential channel steel strand penetration and with a small construction working plane, it is convenient for construction of the first fewand the last few steel strands in the horizontal circumferential channel to carry out, and it is achieved that steel strands are prevented from being wasted.

Description

technical field [0001] The invention relates to the field of prestressed construction of nuclear power plants, in particular to a device and method for threading prestressed steel strands in large-radius circular horizontal tunnels. Background technique [0002] The post-tensioning method of the new nuclear power plant has a bonded prestressing system. The horizontal circular prestressed tunnel has a large circular radius and a tunnel length of about 160 meters. The tunnel inner diameter is small and the steel strands in it are densely packed. -8m to 65m shell, so the construction work surface needs to move up and down, and the moving space is narrow. In the beam threading process of the whole bundle traction of steel strands, the related equipment is heavy and requires a steel strand braiding construction work surface. For the beam threading construction of the horizontal circumferential prestressed tunnel, the beam threading process of pulling the whole bundle of steel st...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a device and method for threading prestressed steel strands in large-radius circular horizontal tunnels, so as to solve the initial and final problems in the steel strand threading construction of horizontal circular prestressed tunnels in nuclear power plants in the prior art. It is difficult to thread the steel strands and there is a problem of wasting steel strands. It is suitable for the environmental requirements that the horizontal circular tunnel needs to move up and down and the construction work area is narrow, and at the same time it is convenient for the first and last few steel strands of the horizontal circular tunnel. Strand construction, the purpose of avoiding the waste of steel strand

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