Special steel comb for penetration and installation of prestressing steel strands and using method thereof
A technology of prestressed steel strands and steel strands, which is applied in construction, building construction, and construction material processing, and can solve problems such as time-consuming and laborious installation of jacks, inability to locate on demand, and wrong insertion of steel strands. Achieve the effect of avoiding cross knotting, improving work efficiency and avoiding misalignment
Inactive Publication Date: 2013-07-03
CHINA NUCLEAR IND HUAXING CONSTR +1
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Problems solved by technology
Due to the large number of steel strands and the long reserved length, the existing technology cannot make them be positioned as required before they are inserted into the jack from bottom to top. As a result, it is difficult to make the steel strands passing through the anchor block correspond to the jacks one by one. Not only does it take time and effort to put on the jack, but it is also easy to cause mis-threading or even knotting troubles due to crossing of steel strands.
Method used
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Embodiment 1
[0020] The prestressed steel strand of the present embodiment wears the special steel comb 1 such as figure 1 , figure 2 , image 3 As shown, it includes a straight strip shape (it can also be a curved strip shape with a certain radian, especially the side of the comb body extending from the comb teeth has a concave arc that matches the outer diameter of the anchor block, so it can be the comb teeth near both ends Rigidity and strength are improved) Comb body 1-2, a row of ten comb teeth 1-1 extends from one side of the comb body 1-2, the width of the comb teeth 1-1 is adapted to the distance between the two rows of perforations in the anchor block 2 , the interval between adjacent comb teeth is adapted to the hole diameter of the anchor block 2, and the hole diameter of the hole is slightly larger than the envelope diameter of the steel strand. The other side of the comb body extends a comb handle 1-3 that is a rectangular frame. The ends of the comb teeth 1-3 have guidin...
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The invention relates to a special steel comb for the penetration and installation of prestressing steel strands and a using method thereof, belonging to the technical field of building construction of facilities such as nuclear power stations. The special steel comb comprises a strip-shaped comb body, wherein a row of comb teeth extend out of one side of the comb body, the width of each comb tooth is adaptive to the distance of two rows of punched holes of an anchoring block, and the interval of the adjacent comb teeth is adaptive to the diameter of each punched hole of the anchoring block, and a comb handle extends out of the other side of the comb body. The special steel comb has the advantages that the difficult problem of corresponding strand pulling between the anchoring block and a jack is solved by means of making a simple and practical auxiliary tool, even though the number of the steel strands is large, the cross knotting of the steel strands can also be effectively avoided, the dislocation is avoided, the working efficiency is obviously improved, and the labor intensity is alleviated.
Description
technical field [0001] The invention relates to a device for threading prestressed steel strands, in particular to a special steel comb for threading prestressed steel strands, and also relates to its use method, which belongs to the technical field of building construction of nuclear power plants and other facilities. Background technique [0002] For construction facilities such as nuclear power plants, as many as 50 steel strands need to be inserted into the prestressed pipelines in the prestressed engineering of the containment in the nuclear island. After the pipeline threading is completed, these high-strength and low-relaxation steel strands need to pass through the array perforations of the anchor block with a predetermined criss-cross angle, and then pass through the guide tube one by one into the holes of the tension jack. Hold for beam tensioning operations. Due to the large number of steel strands and the long reserved length, the existing technology cannot make...
Claims
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Inventor 廖春生郝发领刘强杜春生孙帅
Owner CHINA NUCLEAR IND HUAXING CONSTR