Whole-bundle anchor withdrawal device and anchor removal method using the whole-bunch anchor withdrawal device

Abstract

The invention discloses a whole-bundle disanchoring device and a disanchoring method adopting the same. The whole-bundle disanchoring device comprises a top-front working pile and a top-rear disanchoring device, wherein the top-front working pile is pipe-shaped and is arranged at the outer part of one end of a large prestressed member; the top-rear disanchoring device is formed by a first ring, a second ring and a plurality of cylinders; the first ring and the second ring are arranged in parallel; the plurality of cylinders are arranged between the first ring and the second ring at a distance; one end of each cylinder is fixed on the first ring, and the other end of each cylinder is connected on the second ring by a bolt. The whole-bundle disanchoring device and the disanchoring method disclosed by the invention has the beneficial effects that the top-front working pile and the top-rear disanchoring device are respectively arranged at the outer parts of a temporary anchor and a first working anchor in the disanchoring process of a prestressed steel-stranded bundle and is used for assisting a hollow jack and the working anchor to finish the assembly and disassembly of a working clamping piece together and eliminating the stress, so that works such the construction process of whole disanchoring operation of the prestressed steel-stranded bundle are finished. The whole-bundle disanchoring device disclosed by the invention has the advantages of simple design, simpleness and convenience for operation and the like.

Description

technical field [0001] The invention belongs to the technical field of prestressed engineering construction, and in particular relates to a whole bundle anchor retractor for removing prestressed steel hinges and an anchor retraction method using the whole bundle anchor retractor. technical background [0002] With the rapid development of long-span bridges, the number of various large components continues to increase, and more and more prestressed components are used, which not only have all the advantages of reinforced concrete, but also can give full play to high-strength materials (high strength concrete, high-strength steel), so the cross-sectional size of the member is small, the ratio of the self-weight bending moment to the total bending moment is greatly reduced, and the spanning capacity of the structure is improved. In addition, compared with reinforced concrete, prestressed members can save 30-40% of steel, and the larger the span, the more savings. At the same t...

AI Technical Summary

Problems solved by technology

As we all know, due to the large stress of the prestressed steel hinge in the large prestressed components, the demolition construction technology is cumbersome, the safety control requirements are high, and the construction is very difficult

At present, the commonly used method of demolition of temporary prestressed steel hinges is the method of removing prestressed tendons one by one on a single roof. The disadvantages of this method are cumbersome operation, low construction efficiency, high risk, and poor overall demolition and construction flexibility. The reasons will directly affect the use and development of long-span structures and buildings.

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