Secondary tensile prestressed anchorage

A prestressing and anchoring technology, applied in the direction of structural elements, building components, building reinforcements, etc., can solve the problem of high material cost, achieve the effect of improving engineering safety, small prestressing loss, and improving anchoring efficiency

Inactive Publication Date: 2005-09-07
万国强 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, the material cost is 2.07 times higher

Method used

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  • Secondary tensile prestressed anchorage

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Embodiment Construction

[0007] Depend on figure 1 As can be seen, the backing plate (1) is vertically installed in the concrete, and the outer garden of the support nut (2) is hexagonal, with a thickness of 30mm, and the internal thread of the support nut (2) is connected with the external thread of the anchor ring (3). The steel strand (5) passes through the tapered hole (8) of the clip (4) in the anchor ring (3). The working process is as follows: the first step is to stretch the prestressed steel strand to the design load value according to the conventional construction, and then release the tension. The load transfer route is anchor ring (3)→backing plate (1)→concrete member (7). The second step is to connect the anchor ring (3) with the tension rod with a connector, stretch the anchor ring (3) to the design load value as a whole, and tighten the support nut (2) to the side of the backing plate (1) to release the anchor Finally, the load transmission route is anchor ring (3)→support nut (2)→bac...

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Abstract

The invention relates to a twice spreading prestressing force anchor tool that can make the middle or short prestressing force tendon take twice spreading. The invention is made up of sole plate, bearing nut, anchor circle and clamping piece. That can anchor fix 1-20 prestressing steel strand and high intension steel bundle. It can be widely used for anchor fixing the prestressing force tendon of road and bridge, railway girder, and so on.

Description

technical field [0001] The invention relates to a secondary tension prestressed anchorage, which can anchor multiple prestressed steel strands, and can also anchor high-strength steel strands. Background technique [0002] At present, in the actual engineering design and construction, the stress loss of medium and short-bundle prestressed tendons is generally large, some as high as 20-30%, the utilization rate of steel is low, and there are potential safety hazards. In particular, the vertical prestressed tendons of existing bridges generally adopt the prestressed tendon structure of high-strength finish-rolled thread thick steel bar and the structure of four-level thick steel bar rolled wire prestressed tendon. The anchor retraction of the above two prestressed tendon structures causes the prestress loss (under the experimental conditions, the length of the tendon is 3.28m) to reach 17-25%. Due to the poorer actual construction environment and conditions on site, the retra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/12
Inventor 万国强邵旭东
Owner 万国强
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