Multi-strand finished cable anchorage prestressed anchorage device and its construction method

An anchoring device and prestressing technology, used in the erection/assembly of bridges, bridge parts, bridges, etc., can solve the problems of anchoring performance, difficult to guarantee production and manufacturing technology, weakening the strength of the anchor concrete body, and cumbersome cable replacement process. The cable is convenient, the anchoring quality is good, and the anti-corrosion performance is good.

Active Publication Date: 2017-02-01
LIUZHOU OVM MASCH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The biggest disadvantage is that a large number of reserved through holes weaken the strength of the anchor concrete body, and the anchor cable has a large specification, which requires large construction equipment and is difficult to construct;
[0006] 2. The cable replacement process is cumbersome, and the cable replacement requires large-scale tooling equipment;
[0007] 3. A single finished cable is generally a large-size anchor cable, and its anchoring performance and manufacturing technology are more difficult to guarantee than small-size anchor cables

Method used

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  • Multi-strand finished cable anchorage prestressed anchorage device and its construction method
  • Multi-strand finished cable anchorage prestressed anchorage device and its construction method
  • Multi-strand finished cable anchorage prestressed anchorage device and its construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A multi-strand finished cable anchor prestressed anchoring device

[0046] Such as figure 1As shown, the multi-strand finished cable anchorage prestressed anchoring device includes a prestressed concrete anchoring part and a main cable strand connecting part for connecting with the main cable strand, and the main cable strand connecting part includes a pull rod 1 , a connector 3, a nut assembly I4 composed of a spherical washer 41, a spherical nut 42 and a lock nut 43; The embedded component includes an upper anchor plate 51, a lower anchor plate 52, a spiral rib 6 and a pre-embedded pipe 7, and there is no anti-corrosion material in the pre-embedded pipe of the pre-embedded component; , the anchoring strand has n strands of finished strands 8, and each strand of finished strands 8 is composed of a spherical nut 811, a spherical washer 812, an anchor head 82 and a strand body 83, and the strand strand 83 is wrapped with a single-layer or multi-layer protection The anc...

Embodiment 2

[0050] The installation and construction method of the multi-strand finished cable anchorage prestressed anchorage device described in embodiment one comprises the following steps:

[0051] Step 1: Embedded parts installation: pre-embed the lower anchor plate 52, spiral reinforcement 6, embedded pipe 7, and upper anchor plate 51 on site, pour concrete in layers and then maintain to the design strength;

[0052] Step 2: Connector installation: install and fix the connector 3 on the end surface of the upper anchor plate 51 with bolts at the upper end;

[0053] Step 3: Install the finished cable: put the single finished cable 8 that has been prepared in the factory into the connector 3, the upper anchor plate 51, the embedded pipe 7, the lower anchor plate 52, and the support plate 9 in sequence with the traction cable. Install the anchor assembly II 81 composed of spherical nut 811 and spherical washer 812 at the upper and lower ends to complete the installation of one finished ...

Embodiment 3

[0058] The cable-changing construction method of the multi-strand finished cable type anchorage prestressed anchoring device described in embodiment one comprises the following steps:

[0059] Step 1: Remove the protective cover: remove the upper and lower protective cover 2;

[0060] Step 2: unloading of the old finished cable: use devices such as jack 12, brace 11, tension rod 14 and other devices to stretch and loosen any one of the finished cables 8 at the lower end; (see image 3 );

[0061] Step 3: Remove the old finished cable: connect the old cable with a traction cable on the rear anchor surface B, pull out the unloaded old finished cable 801 from the tunnel on the front anchor surface, and remove it;

[0062] Step 4: Installation of the new finished cable: connect the new cable with a pulling cable on the front anchor surface A, and pull in the new finished cable 802 from the rear anchor surface into the tunnel;

[0063] Step 5: Tensioning of the new finished cable...

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Abstract

The invention relates to a multistrand finished cable type anchorage prestress anchor device. The multistrand finished cable type anchorage prestress anchor device comprises a prestress concrete anchorage portion and a main cable strand connecting portion. The prestress concrete anchorage portion comprises a built-in component pre-embedded concrete, an anchorage cable strand and a nut component. The anchorage cable strand is a finished cable which is manufactured in a factory. A built-in pipe of the built-in component is free from anti-rot materials. The anchorage cable strand has n strands of finished cables. N anchor holes used for anchoring the finished cable are formed in a connector. The n strands of finished cables penetrate through the connector and a support plate respectively. The two ends are anchored to the connector or the support plate through a spherical nut and a spherical washer respectively. Effective load of the n-1 strands of finished cables must be greater than a design load of the anchored main cable strand, and n is an integer which is greater than two. The multistrand finished cable type anchorage prestress anchor device has the advantages that anchoring is reliable, the anti-rot property is excellent, installation construction and normal detection are simple and convenient, and a single strand of anchor cable can be changed under the condition that the normal operation of a major bridge is not influenced.

Description

technical field [0001] The invention relates to a prestressed anchorage system and a construction method thereof, in particular to a replaceable prestressed anchorage device used for suspension bridge anchorages and a construction method thereof. Background technique [0002] The anchorage system of large suspension bridges mostly adopts prestressed anchorage system. There are two types of commonly used prestressed anchorage systems. An unbonded single-root replaceable anchoring system filled with anti-corrosion grease in the stress channel. Compared with the former, the latter has more reliable anti-corrosion and durability. And because the latter's prestressed steel strands and grease can be monitored and replaced, it has "permanent" anti-corrosion performance; for this reason, the oil-filled non-bonded single replaceable anchor system has gained popularity in recent years. Wider application; the current unbonded single replaceable anchor system mainly uses smooth steel s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/14E01D21/00
Inventor 吴明远谢正元吴玉刚崖岗代希华梅刚陈占力苏强吴东明豆彬龙
Owner LIUZHOU OVM MASCH CO LTD
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