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A prestressed anchor for bridge construction

A building construction and prestressing technology, applied in bridge construction, construction, bridges, etc., can solve the problems of springback of steel strands, loss of prestressing, shortening of service life of bridges, etc., to achieve convenient adjustment process and ensure prestressed and service life, the effect of improving reliability

Active Publication Date: 2022-07-19
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing prestressed anchors use oil pressure to tension the steel strands. However, after a long time of use, the steel strands are prone to rebound, resulting in the loss of prestress and the reduction of the service life of the bridge.

Method used

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  • A prestressed anchor for bridge construction
  • A prestressed anchor for bridge construction
  • A prestressed anchor for bridge construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The main structure of this embodiment, such as Figures 1~4 As shown, it includes steel strand 1, corrugated pipe 2, installation sleeve 3, knob 5, stud 6, moving table 7, connecting assembly, installation cover 10, reinforcement table 11, fixing table 13 and spiral rib 14;

[0028] The corrugated tube 2 is connected with the end of the installation sleeve 3, the steel strand 1 runs through the corrugated tube 2 and the installation sleeve 3, the stud 6 is arranged in the longitudinal direction, one longitudinal end of the stud 6 is rotatably connected with the installation sleeve 3, and the other longitudinal end of the stud 6 is connected to the installation sleeve 3. The knob 5 is connected, the stud 6 is rotatably arranged on the installation cover 10, the stud 6 is threadedly connected with the moving table 7, the installation cover 10 is coaxially arranged on the installation sleeve 3, and the installation cover 10 is provided with an adjustment channel 101 in the ...

Embodiment 2

[0030] This embodiment is based on the above-mentioned embodiment, further, a first folding curtain is connected between one longitudinal end of the adjusting channel 101 and one longitudinal end of the connecting plate 8 , and the other longitudinal end of the adjusting channel 101 and the other longitudinal end of the connecting plate 8 A second foldable curtain is connected between, the first folded curtain and the second folded curtain are both pleated structures, the width of the first folded curtain and the second folded curtain are equal to the width of the adjustment channel 101, and play the role of shielding and protection. The other parts of this embodiment are the same as the above-mentioned embodiments, and are not repeated here.

Embodiment 3

[0032] In this embodiment, on the basis of the above-mentioned embodiment, a first installation groove 301 is further provided on the installation sleeve 3, and the end of the installation cover 10 away from the knob 5 is embedded in the first installation groove 301, and the installation process is carried out. positioning, and improve the reliability of installation. The other parts of this embodiment are the same as the above-mentioned embodiments, and are not repeated here.

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Abstract

The invention discloses a prestressed anchor for bridge construction, comprising steel strands, corrugated pipes, installation sleeves, knobs, studs, moving tables, connecting components, installation covers, reinforcement tables, fixed tables and spiral bars; corrugated The pipe is connected to the end of the installation sleeve, the steel strand runs through the corrugated pipe and the installation sleeve, the stud is arranged longitudinally, one end of the longitudinal direction of the stud is rotatably connected to the installation sleeve, the other longitudinal end of the stud is connected to the knob, and the stud is rotated and set on the installation cover. The stud is screwed with the moving table, the installation cover is coaxially arranged on the installation sleeve, the installation cover is provided with adjustment channels along the longitudinal direction, the adjustment channels are evenly arranged around the installation cover, and the connection components are arranged in multiple groups. Corresponding one-to-one with the adjustment channels, the connecting assembly includes a connecting plate and a connecting table, and two ends of the connecting plate are respectively connected with the moving table and the connecting table. The invention can conveniently adjust the tension degree of the steel strand and ensure the prestress and service life of the steel strand.

Description

technical field [0001] The invention relates to the technical field of bridge construction appliances, in particular to a prestressed anchor for bridge construction. Background technique [0002] The anchor is suitable for the anchoring of concrete prestressed tension in the process of engineering construction. Generally used in bridge construction, pre-installed and positioned, and then poured concrete, buried at both ends of the concrete, that is, the two ends of the bellows, which are the end faces set for the stability of the jack during tensioning. [0003] Most of the existing prestressed anchorages use oil pressure to tension the steel strands. However, after long-term use, the steel strands are prone to springback, resulting in loss of prestressing and shortening the service life of the bridge. SUMMARY OF THE INVENTION [0004] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a prestressed anchor for bridge construct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E04C5/12
CPCE01D21/00E04C5/12
Inventor 何十美高强林金耐姜信贺郭建强何巍张庆饶胜斌杜长生林立东
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG