CN218374732U - Prestressed anchorage cable stretch-draw is with propping boots - Google Patents
Prestressed anchorage cable stretch-draw is with propping boots Download PDFInfo
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- CN218374732U CN218374732U CN202222641562.7U CN202222641562U CN218374732U CN 218374732 U CN218374732 U CN 218374732U CN 202222641562 U CN202222641562 U CN 202222641562U CN 218374732 U CN218374732 U CN 218374732U
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Abstract
The utility model belongs to the technical field of the anchoring engineering, specifically disclose a prestressed anchorage cable stretch-draw is with propping boots, include: the device comprises a bottom ring plate, support columns, a top ring plate, a working anchor plate, a jack, a tool anchor plate and steel strands; the top of the bottom ring plate is connected with the bottom of the supporting column, the top of the supporting column is connected with the bottom of the top ring plate, and the jack is arranged at the top of the top ring plate; the working anchor plate is arranged in the center of the circular ring of the bottom ring plate, and the tool anchor plate is clamped at the top of the jack; the steel strand penetrates through the tool anchor plate, the jack and the working anchor plate in sequence; the steel strand is clamped in the first tool anchor plate through the working clamping piece. The utility model discloses the steel strand wires run through instrument anchor slab, jack and work anchor slab in proper order, through the work clamping piece with the steel strand wires joint in the work anchor slab, at prestressed anchorage cable stretch-draw in-process, both can carry out the stretch-draw to the steel strand wires of prestressed anchorage cable, again can the prestressed anchorage cable the steel strand wires carry out the artificial controlled retraction.
Description
Technical Field
The utility model belongs to the technical field of the anchor engineering, concretely relates to prestressed anchorage cable stretch-draw is with propping boots.
Background
At present, during the stretching construction of the prestressed anchor cable, a special tool, namely a limiting plate, produced by a prestressed anchor tool manufacturer is usually arranged on a working anchor plate and a working clamping piece at the stretching end of the prestressed anchor cable. The limiting plate is pressed on the working anchor plate, so that the working clamping piece is limited not to fall off in the tensioning process of the prestressed anchor cable while the working clamping piece is ensured to have a small moving space. Due to the design structure of the clamping piece, the working clamping piece is in a state of not clamping the steel strand only under the working condition that the steel strand is tensioned and extends outwards. Therefore, the operation can cause the steel strand in the prestressed anchor cable to be stretched only at all times and cannot be retracted manually and controllably. Then, for the construction of the prestressed anchor cable, the steel strand of the prestressed anchor cable needs to be manually and controllably retracted in many times. For example, the standard of prestressed anchor cable construction requires that the tensioning process of the prestressed anchor cable is a repeated process of tensioning and retraction control; tensioning the prestressed anchor cable by using an over-design working load, and then unloading the prestressed anchor cable to the design working load to lock the steel strand; it may be required to measure the residual stress of the prestressed anchor cable by holding the steel strand with the through jack after the prestressed anchor cable is locked for a certain period of time.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a prestressed anchor cable stretch-draw is with propping boots to solve the problem that the prestressed anchor cable can't be retracted by artificial controllable after stretch-draw.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a prestressed anchorage cable stretch-draw is with propping boots, include: the device comprises a bottom ring plate, support columns, a top ring plate, a working anchor plate, a jack, a tool anchor plate and steel strands;
the top of the bottom ring plate is fixedly connected with the bottoms of the support columns, the tops of the support columns are fixedly connected with the bottom of the top ring plate, and the bottom of the jack is arranged on the top of the top ring plate; the working anchor plate is arranged in the center of the circular ring of the bottom ring plate, and the tool anchor plate is clamped at the top of the jack; a plurality of steel strands sequentially penetrate through the tool anchor plate, the jack and the working anchor plate; the plurality of steel strands are clamped in the working anchor plate through the working clamping piece.
Furthermore, one end of each steel strand penetrates through the anchor head concrete and the rock mass and is fixed in the rock mass.
Furthermore, the jack is a feed-through jack.
Furthermore, the bottom ring plate is fixed on the anchor head concrete through an anchor backing plate.
Further, the outer diameter of the bottom ring plate is the same as that of the top ring plate.
Further, the inner diameter of the bottom ring plate is larger than the outer diameter of the working anchor plate.
Furthermore, the bottom ring plate and the top ring plate are both circular ring columns.
Furthermore, a plurality of tapered slotted holes are formed in the working anchor plate and the tool anchor plate and are used for clamping the working clamping piece and the tool clamping piece respectively.
Furthermore, the steel strands are clamped in the tool anchor plate through tool clamping pieces.
The utility model discloses following beneficial effect has at least:
1. the utility model discloses a set up many steel strands and run through instrument anchor slab, jack and work anchor slab in proper order to through the work clamping piece with the steel strand wires joint in the work anchor slab, at prestressed anchorage cable stretch-draw in-process, both can carry out the stretch-draw to the steel strand wires of prestressed anchorage cable, the steel strand wires that again can prestressed anchorage cable go on artificially to control to retract again.
2. The utility model discloses the compressive stress that the transmission was come when the well crown plate can bear whole cable stretch-draw construction of prestressed anchorage cable, the compressive stress that the transmission was come when the top ring board can bear whole cable stretch-draw construction of prestressed anchorage cable to can link up mutually with the bottom surface of whole cable for stretch-draw center jack surely, can guarantee simultaneously that all steel strands of prestressed anchorage cable can pass in the middle of the crown plate.
3. The utility model discloses the compressive stress that the transmission was come when well support column can bear prestressed anchorage cable whole bundle stretch-draw construction, and all steel strands that can guarantee prestressed anchorage cable simultaneously can pass from the space between the support column to make operation work clamping piece have enough space.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention. In the drawings:
FIG. 1 is a schematic view of a typical longitudinal section of the present invention in an applied state;
FIG. 2 is a schematic top view of the 4-prop according to the present invention;
FIG. 3 is a schematic top view of the 3-prop according to the present invention;
FIG. 4 is a schematic cross-sectional view of 4 pillars according to the present invention;
FIG. 5 is a schematic cross-sectional view of the present invention with 3 pillars;
FIG. 6 is a schematic side view of the 4-prop according to the present invention;
FIG. 7 is a schematic side view of the 3-prop according to the present invention;
FIG. 8 is a schematic longitudinal sectional view of 4 pillars of the present invention;
FIG. 9 is a schematic longitudinal sectional view of 3 pillars according to the present invention;
reference numerals: 1. a bottom ring plate; 2. a support pillar; 3. a top ring plate; 4. an anchor backing plate; 5. anchor head concrete; 6. a rock mass; 7. a working anchor plate; 8. a working clamping piece; 9. a jack; 10. a tool anchor plate; 11. a tool clamping piece; 12. and (5) steel strands.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
As shown in fig. 1, a shoe for tensioning a prestressed anchor cable includes:
the device comprises a bottom ring plate 1, support columns 2, a top ring plate 3, a working anchor plate 7, a jack 9, a tool anchor plate 10 and a steel strand 12;
the top of the bottom ring plate 1 is fixedly connected with the bottoms of the support columns 2, the tops of the support columns 2 are fixedly connected with the bottom of the top ring plate 3, and the bottom of the jack 9 is arranged at the top of the top ring plate 3; the working anchor plate 7 is arranged in the center of the circular ring of the bottom ring plate 1, and the tool anchor plate 10 is clamped at the top of the jack 9; a plurality of steel strands 12 sequentially penetrate through the tool anchor plate 10, the jack 9, the working anchor plate 7, the anchor head concrete 5 and the rock mass 6 and are fixed in the rock mass 6; the plurality of steel strands 12 are clamped in the working anchor plate 7 through the working clamping pieces 8.
The top surface of the top ring plate 3 is used as a supporting surface of the jack 9 in a use state; the jack 9 is a feed-through jack.
The bottom ring plate 1 is fixed on anchor head concrete 5 through an anchor backing plate 4, and the outer diameter of the bottom ring plate 1 is the same as that of the top ring plate 3; the bottom ring plate 1 is a circular ring column with the inner diameter slightly larger than the outer diameter of the stretching end working anchor plate 7 of the involved prestressed anchor cable stretching construction object. The working anchor plate 7 is an anchorage device at the anchoring end of the prestressed anchor cable.
The bottom ring plate 1 is pressed on the exposed surface of the anchor backing plate 4 in a use state; the anchor backing plate 4 is an exposed end bearing body of an engineering entity needing to absorb prestress applied by a prestress anchor cable.
The top ring plate 3 is a circular ring column capable of bearing the pressure transmitted by the bottom surface of the through jack for stretching the whole involved prestressed anchor cable; and can be firmly connected with the bottom surface of the straight-through jack for tensioning the whole cable.
The bottom ring plate 1 and the top ring plate 3 allow the steel strand 12 to pass through; the steel strand 12 is a tensioned object in the prestressed anchoring engineering.
The support columns 2 are 3-4 support columns capable of bearing the acting force of the whole prestressed anchor cable bundle tensioning construction. As shown in fig. 2, 4, 6 and 8, the structure of the case of using 4 struts is schematically illustrated; as shown in fig. 3, 5, 7 and 9, which are schematic structural views when three support posts are used; the device can bear the compressive stress transmitted during the whole-bundle tensioning construction of the involved prestressed anchor cable, and simultaneously can ensure that all steel strands 12 of the prestressed anchor cable can pass through the space between the supporting columns 2, and ensure that the operation working clamping pieces 8 and the tool clamping pieces 11 have enough space.
The working anchor plate 7 and the tool anchor plate 10 are respectively provided with a plurality of conical slotted holes which are respectively used for clamping the working clamping piece 8 and the tool clamping piece 11; the plurality of steel strands 12 are also clamped in the tool anchor plate 10 by the tool clamping pieces 11.
A use method of a supporting shoe for tensioning a prestressed anchor cable comprises the steps of using the prestressed anchor cable in the tensioning process and using the prestressed anchor cable after being locked, and specifically comprises the following steps:
s1: the prestressed anchor cable is used in the tensioning process;
in the prestressed anchor cable tensioning operation, at the prestressed anchor cable tensioning end, after each steel strand 12 of the prestressed anchor cable is tensioned in a pre-tensioning mode, the supporting shoe for prestressed anchor cable tensioning penetrates through the steel strand 12 of the tensioning section, the bottom ring plate 1 is sleeved on the working anchor plate 7 and is in contact joint with the anchor backing plate 4, the whole cable tensioning penetrating type jack 9 and the tool anchor plate 10 penetrate through the top ring plate 3 in sequence, and after the tool clamping piece 11 is installed on the tool anchor plate 10, the prestressed tensioning operation is carried out. In this state, the supporting shoe for tensioning the prestressed anchor cable provides an operation space for the operation of the working clamping piece 8, so that the steel strand can be tensioned manually and controllably or the stress is released to be contracted in the tensioning construction process of the prestressed anchor cable.
S2: locking the prestressed anchor cable and then using;
after the prestressed anchor cable is locked for a period of time, the prestressed anchor cable needs to be locked after the stress value of the steel strand 12 is artificially and controllably reduced for a certain purpose, and the steel strand 12 at the tensioning end of the prestressed anchor cable needs to be kept at the working section without being cut off. Firstly, the supporting shoe for tensioning the prestressed anchor cable penetrates through a steel strand 12 of a tensioning section, a bottom ring plate 1 is sleeved on a working anchor plate 7 and is in contact fit with an anchor backing plate 4, a jack 9 and a tool anchor plate 10 are sequentially penetrated on a top ring plate 3, and a tool clamping piece 11 is arranged on the tool anchor plate 10. The whole-cable tensioning penetrating jack 9 slowly applies tensile stress to the steel strand 12 under the action of oil pressure until the working clamping piece 8 is just loosened and is finely pulled out of the working anchor plate 7, the working clamping piece 8 is clamped by a Y-shaped tool through an operation space provided by the supporting shoe for tensioning the prestressed anchor cable, and then the steel strand 12 is unloaded manually and controllably by slowly unloading the oil pressure of the penetrating jack 9. When the prestressed anchor cable needs to be locked, the working clamping piece 8 is pushed into the conical slotted hole of the working anchor plate 7 by using a Y-shaped tool, and the steel strand 12 is clamped and fastened.
The method can also measure the residual stress of the prestressed anchor cable by a mode that the center-penetrating jack 9 holds the steel strand 11.
It will be appreciated by those skilled in the art that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.
Claims (9)
1. The utility model provides a prestressed anchorage cable stretch-draw is with propping boots which characterized in that includes: the device comprises a bottom ring plate (1), supporting columns (2), a top ring plate (3), a working anchor plate (7), a jack (9), a tool anchor plate (10) and a steel strand (12);
the top of the bottom ring plate (1) is fixedly connected with the bottoms of the support columns (2), the tops of the support columns (2) are fixedly connected with the bottom of the top ring plate (3), and the bottom of the jack (9) is arranged at the top of the top ring plate (3); the working anchor plate (7) is arranged in the center of the circular ring of the bottom ring plate (1), and the tool anchor plate (10) is clamped at the top of the jack (9); a plurality of steel strands (12) sequentially penetrate through the tool anchor plate (10), the jack (9) and the working anchor plate (7); the steel strands (12) are clamped in the working anchor plate (7) through the working clamping piece (8).
2. The supporting shoe for tensioning the prestressed anchor cable as claimed in claim 1, wherein one end of the steel strands (12) penetrates through the anchor head concrete (5) and the rock mass (6) and is fixed in the rock mass (6).
3. The spreader shoe for prestressed anchor cable tensioning as claimed in claim 1, wherein said jack (9) is a through-center jack.
4. The shoe for tensioning a prestressed anchor cable according to claim 2, wherein the bottom ring plate (1) is fixed on an anchor head concrete (5) through an anchor backing plate (4).
5. A prestressed anchor cable tensioning jack shoe according to claim 1, wherein the outer diameter of the bottom ring plate (1) is the same as the outer diameter of the top ring plate (3).
6. A shoe for prestressed anchor cable tensioning according to claim 1, wherein the inner diameter of the bottom ring plate (1) is greater than the outer diameter of the working anchor plate (7).
7. The spreader for tensioning the prestressed anchor cable according to claim 1, wherein the bottom ring plate (1) and the top ring plate (3) are both circular ring columns.
8. The supporting shoe for prestressed anchor cable tensioning according to claim 1, wherein a plurality of tapered slots are formed in each of the working anchor plate (7) and the tool anchor plate (10) for clamping the working clamping piece (8) and the tool clamping piece (11).
9. The tension shoe for prestressed anchor cables as claimed in claim 8, wherein said plurality of steel strands (12) are further engaged in the tool anchor plate (10) by means of the tool clamping piece (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222641562.7U CN218374732U (en) | 2022-09-30 | 2022-09-30 | Prestressed anchorage cable stretch-draw is with propping boots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222641562.7U CN218374732U (en) | 2022-09-30 | 2022-09-30 | Prestressed anchorage cable stretch-draw is with propping boots |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218374732U true CN218374732U (en) | 2023-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222641562.7U Active CN218374732U (en) | 2022-09-30 | 2022-09-30 | Prestressed anchorage cable stretch-draw is with propping boots |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218374732U (en) |
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2022
- 2022-09-30 CN CN202222641562.7U patent/CN218374732U/en active Active
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