Construction method of steel pipe prestressed steel strand passing through pipe at high altitude
A technology of prestressed steel strands and construction methods, which is applied in the processing of building materials, construction, building construction, etc., and can solve the problems of being unable to bypass obstacles, unsuitable for lifting grids, and strong hardness of steel casings
Active Publication Date: 2021-11-09
CHINA CONSTR EIGHT ENG DIV CORP LTD
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Problems solved by technology
That is, before the steel strands are inserted into the lower chord, the steel sleeves are inserted for protection, but this method is not suitable for lifting the grid, because in the process of lifting the grid, there will inevitably be obstacles, and the steel sleeves The hardness is strong and cannot be bent, so it cannot bypass obstacles
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[0046] When the continuous steel casing 31 and the continuous lower chord 11' are sheathed, the two ends of the steel strand bundle 20 are passed through the continuous steel sleeve 31 and the continuous lower chord 11' to form peeling section;
[0047] After the continuation of the steel casing 31 and the continuation of the lower chord 11' were all welded and fixed, the plastic jacket (such as image 3 shown), put on a temporary steel casing (not marked in the figure);
[0048] When preparing to set the anchor 70 at the stripping section, extract the temporary steel sleeve (such as image 3 extracted state).
[0049]Specifically, the peeling section is used to connect the main body of the structure to be spliced outside the network frame 10. In this embodiment, the main body of the structure to be spliced is a frame column 40, and usually the top of the frame column 40 is provided with a fixing bracket. Bearing ball 41, for the frame column 40 provided with bearing ba...
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The invention relates to a high-altitude pipe-piercing construction method for prestressed steel strands of steel pipes. Set the initial steel casing in the pipe, put the steel strand bundle through the initial steel casing and let both ends pass through; raise the grid frame to the design elevation; Set the continuous steel casing and the continuous lower chord, and weld and fix the continuous steel casing and the initial steel casing, and weld and fix the continuous lower chord and the initial lower chord. The invention cooperates with the construction characteristics of the lifting grid, optimizes the construction process of the steel strand through the pipe, not only avoids the burning of the steel strand due to the welding of the lower chord pipe, but also avoids the inability to wind the wire during the lifting process of the grid. The disadvantages of the existing structures on both sides of the open grid frame.
Description
technical field [0001] The present invention relates to the construction field of prestressed grids, in particular to a construction method for steel pipe prestressed steel strands passing through high-altitude pipes. Stress trusses. Background technique [0002] At present, with the advancement of grid lifting technology, more and more grid structures adopt overall lifting. However, for the prestressed network frame, the overall lifting method increases the difficulty of the prestressed steel strand through the pipe construction. The existing prestressed steel strand through the pipe construction method mainly includes: [0003] 1. All high-altitude pipe penetration methods. That is, the high-altitude pipe threading is carried out after the grid frame is raised to the design level. Since the prestressed steel strands are very long and heavy, especially for long-span prestressed trusses, it is very difficult to use this method to carry out high-altitude pipe threading. An...
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IPC IPC(8): E04G21/12E04B1/342E04B1/35
CPCE04B1/342E04B1/35E04B2001/3583E04G21/12
Inventor 李昭陈波申雨王晓丽程银行刘创罗浩熊勋昌
Owner CHINA CONSTR EIGHT ENG DIV CORP LTD