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A connection structure between a prestressed steel cable or a steel strand and a pole end

A prestressed steel cable and connection structure technology, which is applied in the field of supporting fish-belly beams or string beams, and strut end structures, can solve the problems of shortening the service life of steel strands and prone to friction, so as to prolong the service life and reduce construction costs. Risk factor, effect of reducing wear

Active Publication Date: 2017-07-21
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Similarly, for the string beam structure, since the struts and the prestressed steel strands are not completely fixed, they are prone to friction when subjected to dynamic loads, which seriously shortens the service life of the steel strands.

Method used

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  • A connection structure between a prestressed steel cable or a steel strand and a pole end
  • A connection structure between a prestressed steel cable or a steel strand and a pole end
  • A connection structure between a prestressed steel cable or a steel strand and a pole end

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Embodiment Construction

[0015] Taking the fish-belly beam with a span of 37m in a foundation pit as an example, the layout of the fish-belly beam is as follows: image 3 As shown, in the figure 2 is the steel purlin, 3 is the steel outer support, 4 is the steel tie rod, 5 is the support rod, and 6 is the steel strand. Figure 4 It is a structural diagram of a pole end in the prior art, the pole end includes an upper plate 8, a middle plate 9 and a lower plate 10, the upper, middle, and lower plates are welded to the anchor plate 14, and the anchor plate 14 is connected by bolts To the head plate 15 of the strut, the middle reinforcement plate 18 and the facing plate 19 are also connected between the upper, middle and lower plates, so that the steel strand 6 will directly connect with the facing plate 19 of the supporting strut 5 In the process of prestressing, the outer plastic layer of the steel strand is easily damaged by wear and tear, which affects its service life. According to the present inve...

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Abstract

The invention discloses a connection structure between a prestressed steel cable or a steel strand and a pole end, which is characterized in that a roller device is installed on the top of the pole, and the prestressed steel cable or steel strand passes through the roller device Connect with the pole. The roller device includes an upper plate and a lower plate arranged in parallel, the upper and lower plates have roller holes, and a roller is perforated in the roller holes of the upper and lower plates, and a roller is sleeved on the roller . When the number of steel strands is large, the middle plate can be increased, a roller is set between the upper plate and the middle plate, and a roller is established between the middle plate and the lower plate. The advantage of the patent of the present invention is that it overcomes the steel strand rolling during the prestressed tension, avoids the risk of abrasion and wire breakage at the edge tip of the steel plate on the contact surface, further ensures the safety of construction and prolongs the use of the steel strand life.

Description

technical field [0001] The invention relates to supporting fish-belly girders or string string girders used in various fields of engineering. For the two beam structures, prestressed steel strands combined with struts are used to strengthen the bottom beam. This patent specifically relates to a strut end structure, which is mainly used to improve the currently used strut ends, especially Applicable to fishbelly beam support rod ends. Background technique [0002] "Fish-belly beam" is a kind of equal-strength beam commonly used in industrial plants. It mainly sets vierendeel frame structure beams with different sections according to the different internal forces of the beams, so that the maximum normal stress on each section of the structure is equal to the allowable material. stress. Because it looks like a fish belly, it is called "fish belly beam" (such as figure 1 shown). Nowadays, some scientific research institutes have improved it and applied it to foundation pit e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C5/08E04C5/12
Inventor 刘发前卢永成
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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