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Clamping piece type prestressed anchorage work clamping piece compression equipment

A compression device and prestressing technology, applied in the erection/assembly of bridges, bridges, buildings, etc., to achieve the effect of eliminating steel strand retraction, high stability, and accurate installation position

Active Publication Date: 2018-10-09
CHINA RAILWAY NO 17 BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The invention solves the problems that the tension tool of the existing clip-type prestressed anchorage inevitably brings about the shrinkage of the steel strand and the slippage between the working clip and the steel strand, and provides a clip-type Prestressed anchorage working clip pressing device, which can directly press the working clip before the steel strand is tensioned, so as to avoid the shrinkage and slippage of the steel strand

Method used

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  • Clamping piece type prestressed anchorage work clamping piece compression equipment
  • Clamping piece type prestressed anchorage work clamping piece compression equipment
  • Clamping piece type prestressed anchorage work clamping piece compression equipment

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Embodiment Construction

[0027] The clip-type prestressed anchorage working clip-pressing device is composed of an extension limit sleeve 2, a clip push column 3, a micro jack 4, and a push-up working sleeve 5;

[0028] The extension limit sleeve 2 is cylindrical, and one end of the limit sleeve 2 is provided with a limit slot 21 for the working anchor;

[0029] The clip push column 3 is composed of a column body 31 and a fin 32 fixed on one end of the column body 31, uniformly distributed along the end surface of the column body 31 and perpendicular to the axis of the column body 31. The column body 31 is provided with a working anchor along its axis. There is a steel strand through hole 33 corresponding to the anchor hole, and one end of the cylinder 31 of the clip push column 3 that is not fixed to the fin 32 extends into the length limit sleeve 2, when the fin 32 and the length limit sleeve 2 When the end faces are in contact, the end face of the cylinder body 31 without the fixed fins 32, that is...

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Abstract

The invention relates to prestressed construction equipment, in particular to construction equipment matched with a clamping piece type prestressed anchorage, namely a clamping piece type prestressedanchorage work clamping piece compression device. The problem that tensioning tools of existing clamping piece prestressed anchorages unavoidably cause steel strand retraction and sliding between a clamping piece and a steel strand is solved. The device is composed of an elongation limiting sleeve, a clamping piece pushing column, a mini jack and a jacking working sleeve. The device compress the work clamping piece before the mini jack releases and tensions, can reduce and even eliminate steel strand retraction difficult to be accurately measured and can reduce loss of tension force of a steelstrand. The equipment is ideal matching construction equipment of a clamping piece type prestressed anchorage.

Description

technical field [0001] The invention relates to prestressed construction equipment, in particular to construction equipment matched with a clip-type prestressed anchor, in particular to a clip-type prestressed anchor working clip pressing device. Background technique [0002] figure 1 The schematic diagram of the structure of the clip-type prestressed anchorage and its tensioning tool is shown; the working process of the clip-type prestressed anchorage for anchoring the steel strand is: when the steel strand is tensioned, the working clip follows the steel strand. Move to the bottom of the limit plate groove in the direction of the steel strand pulling, and lose the restraint on the steel strand. When the jack stretches the steel strand to the design control tension, at the moment when the oil returns to relax the steel strand, the steel strand The linear elastic shrinkage, the working clip follows the shrinkage and moves into the anchorage hole, and then the steel strand i...

Claims

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Application Information

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IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 俞文龙陈礼宏靳江海李豪杰曹海兵高志新黄想禄
Owner CHINA RAILWAY NO 17 BUREAU GRP
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