CN101886477B - Prestressed tensioning group anchorage single-hole limiting plate - Google Patents
Prestressed tensioning group anchorage single-hole limiting plate Download PDFInfo
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- CN101886477B CN101886477B CN2010102231464A CN201010223146A CN101886477B CN 101886477 B CN101886477 B CN 101886477B CN 2010102231464 A CN2010102231464 A CN 2010102231464A CN 201010223146 A CN201010223146 A CN 201010223146A CN 101886477 B CN101886477 B CN 101886477B
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- anchor
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Abstract
The invention discloses a prestressed tensioning group anchorage single-hole limiting plate. A limiting plate body has a cylinder structure, and is axially provided with a steel strand penetration hole; one end face of the limiting plate body is circumferentially uniformly provided with six supporting shoes enclosing an inner circle with the diameter more than 30mm; sunken arc grooves are formed on outsides between every two adjacent supporting shoes respectively; a tee line of the curved surfaces of the sunken arc grooves is parallel to the axis of the limiting plate body, and is less than 32.5mm distance away from the axis of the limiting plate body; and the circle radius of the sunken arc grooves is more than 15mm. When the limiting plate is arranged, the sunken arc grooves are opposite to anchored clamping pieces in adjacent anchor holes so as to avoid interference with the clamping pieces in the adjacent anchor holes; the six supporting shoes are totally supported on an anchor plate and directly apply forces to the anchor plate, so the limiting plate body is securely and well stressed to achieve high security; and simultaneously, the damage, which is caused by extrusion between the limiting plate and the adjacent clamping pieces when the limiting plate is subjected to the forces, to limiting plate body is avoided, so the service life of the limiting plate is prolonged and the use cost is reduced.
Description
Technical field
The present invention relates to a kind of employed device when steel bar concrete is carried out prestressed stretch-draw, relate in particular to a kind of prestressed tensioning group anchorage single-hole limiting plate.
Background technology
In the existing prestressed stretch-draw process, no matter be single hole anchor or group anchor,, all need adopt single hole limiting plate and anchor restorer stripped thread taking place or mending when opening.
In the prior art, the structure of single hole limiting plate as shown in Figure 1, limiting plate body 1a cuts away a part by cylinder along its axial direction symmetry and forms, along axis steel strand perforation 2a is set, one end face is provided with the arc back-up block 3a of a symmetry, and two arc back-up block 3a and end face form indent stopper slot 4a.
When using this single hole limiting plate to carry out steel bar concrete construction pre-stress stretching, mounting structure as shown in Figures 2 and 3.Steel strand 5a passes anchor slab 6a, adopts three intermediate plate 7a to be clipped on the steel strand 5a, and intermediate plate 7a is inserted in the anchor hole 8a from the heavy caliber end of the anchor hole 8a of anchor slab 6a.Because the cylindrical of intermediate plate 7a and the endoporus of anchor hole 8a are the pyramidal structure that matches and use, steel strand 5a moves the realization prestressed stretch-draw to the heavy caliber end of anchor hole 8a, and intermediate plate 7a tightened steel strand 5a when steel strand 5a moved to the small-caliber end of anchor hole 8a.Apply prestressed stretch-draw and realize by jack, for the piston that makes jack can be pressed on the anchor slab 6a, simultaneously also in order to prevent that intermediate plate 7a from withdrawing from from anchor hole 8a, therefore must be between the piston of the outside of intermediate plate 7a and jack installation single hole limiting plate.The steel strand 5a that passes is passed steel strand perforation 2a on the limiting plate body 1a, intermediate plate 7a is relative with indent stopper slot 4a, and be limited in the indent stopper slot 4a, again steel strand 5a is passed the piston of jack and be connected with jack, start the jack pair steel bar concrete and carry out prestressed stretch-draw.
In use mainly there is following deficiency in the single hole limiting plate of said structure: when one, the jack pair steel bar concrete carries out prestressed stretch-draw, two arc back-up block 3a of single hole limiting plate are pressed in respectively in adjacent two anchor hole 8a on the intermediate plate 7a of anchoring, the single hole limiting plate can only press on the anchor slab 6a by intermediate plate 7a, and can not directly press on the anchor slab 6a, cause single hole limiting plate frock not in place, the arc back-up block 3a unbalance stress of two symmetries easily causes security incident; When two, the single hole limiting plate is by intermediate plate 7a power transmission, the hardness of intermediate plate 7a causes often being lacked well damage by pressure with two arc back-up block 3a of adjacent intermediate plate 7a extruding much larger than the hardness of single hole limiting plate, cause single hole limiting plate turnover rate height, use cost is higher.
Summary of the invention
At the prior art above shortcomings, can avoid contacting when the invention provides a kind of prestressed stretch-draw with the intermediate plate of adjacent anchoring, directly press on the anchor slab, and frock puts in place, stressed even, the life-span is long, the prestressed tensioning group anchorage single-hole limiting plate that use cost is low.
Prestressed tensioning group anchorage single-hole limiting plate provided by the invention, described limiting plate body is a cylindrical structure, along axis the steel strand perforation is set, circumferentially is evenly equipped with six back-up blocks, form clip groove between described adjacent two back-up blocks in an end face upper edge of described limiting plate body.
Further, described clip groove is the indent deep-slotted chip breaker, the center of circle line at the arc surface place of described indent deep-slotted chip breaker is parallel with the axis of limiting plate body, and the axial line distance of center of circle line and limiting plate body is less than 32.5mm, and the arc radius of described indent deep-slotted chip breaker is greater than 15mm.
Further, the length of described six back-up blocks on the axial direction of described limiting plate body is 9～12mm.
Further, the interior circular diameter that described six back-up blocks surround is greater than 30mm, and less than 38mm.
Compared with prior art, prestressed tensioning group anchorage single-hole limiting plate of the present invention has following advantage:
1, the present invention circumferentially is evenly equipped with six back-up blocks in the end face upper edge of limiting plate body, the outside between adjacent two back-up blocks forms clip groove, during installation, make that the intermediate plate of anchoring is corresponding in clip groove and the adjacent anchor hole, avoid with adjacent anchor hole in intermediate plate disturb, six back-up blocks can be supported on the anchor slab and to anchor slab fully directly exerts pressure, the limiting plate body is stressed firm, stressed good, safe.
2, simultaneously, when also having avoided the limiting plate body stressed and extruding takes place adjacent intermediate plate and cause the limiting plate body to damage, prolong application life, reduced use cost.
Description of drawings
Fig. 1 is the structural representation of single hole limiting plate of the prior art;
Fig. 2 is the cross section view of single hole limiting plate of the prior art under user mode;
Fig. 3 is along the cross section view of A-A direction among Fig. 2;
Fig. 4 is the structural representation of prestressed tensioning group anchorage single-hole limiting plate of the present invention;
Fig. 5 is the cross section view of prestressed tensioning group anchorage single-hole limiting plate of the present invention under user mode;
Fig. 6 is along the cross section view of B-B direction among Fig. 5.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in further detail.
Fig. 4 is the structural representation of prestressed tensioning group anchorage single-hole limiting plate of the present invention, as shown in the figure.The limiting plate body 1 of prestressed tensioning group anchorage single-hole limiting plate is a cylindrical structure, along axis steel strand perforation 2 is set, circumferentially uniform in an end face upper edge of described limiting plate body 1 six back-up blocks 3 are set, form clip groove between adjacent two back-up blocks, the size of clip groove is decided on the size of anchor hole inner clamp piece and the distance of adjacent anchor hole.During installation, make that the intermediate plate of anchoring is corresponding in clip groove and the adjacent anchor hole, avoid with adjacent anchor hole in intermediate plate disturb.
The interior circular diameter that six back-up blocks 3 surround is greater than 30mm, selects for use greatlyyer than the diameter of existing intermediate plate, and intermediate plate is moved freely in the interior circle that six back-up blocks surround.Clip groove between adjacent two back-up blocks 3 is an indent deep-slotted chip breaker 4, the center of circle line at the arc surface place of indent deep-slotted chip breaker 4 is parallel with the axis of limiting plate body 1, and the axial line distance of center of circle line and limiting plate body 1 is less than 32.5mm, and the arc radius of described indent deep-slotted chip breaker 4 is greater than 15mm.
The length of six back-up blocks 3 on the axial direction of limiting plate body 1 is 9～12mm, with regard to existing intermediate plate, after intermediate plate clamps the anchor hole of steel strand insertion anchor slab, stays the outer length of anchor slab end face greatly about about 6mm.When the jack pair steel bar concrete carries out prestressed stretch-draw, steel strand are to jack one side shifting, intermediate plate withdraws from along the anchor hole position, position-limiting action because of limiting plate body 1, intermediate plate can only move in the length range of 3～6mm, both prevented that intermediate plate from withdrawing from fully in anchor hole, do not influenced steel strand again and move to the jack direction.
Intermediate plate is generally the arc of pyramidal structure, and the diameter of big end is 30mm, and the interior circular diameter that six back-up blocks 3 surround is greater than 30mm, and less than 38mm.So neither hinder intermediate plate in the interior circle that six back-up blocks 3 surround, to move, also make six back-up blocks 3 self have enough intensity simultaneously.
When using this prestressed tensioning group anchorage single-hole limiting plate to carry out steel bar concrete construction pre-stress stretching, at first the limiting plate body is installed between the piston (not drawing among the figure) of anchor slab 6 and jack, as shown in Figure 5 and Figure 6.Steel strand 5 pass the anchor hole 8 of anchor slab 6, adopt three intermediate plates 7 to be clipped in steel strand 5, and the heavy caliber end of intermediate plate 7 from the anchor hole 8 of anchor slab 6 inserted in the anchor hole 8.Again steel strand 5 are passed the steel strand perforation 2 of limiting plate body 1, pass the piston of jack and be connected with jack.The interior circle that intermediate plate 7 and six back-up blocks 2 are surrounded is corresponding, and six back-up blocks 2 are stuck on the anchor slab 6 between the interior intermediate plate of adjacent in twos anchor hole.When startup jack pair steel bar concrete carried out prestressed stretch-draw, the piston rod of jack was pressed in the other end of limiting plate body 1, and limiting plate body 1 directly passes to power anchor slab 6 by six back-up blocks 3 on it.
Because six back-up blocks 3 have been avoided the intermediate plate position in the adjacent anchor hole fully, form six positions of annular and contact with anchor slab 6, both stressed evenly, do not disturb other anchor hole to realize normal single hole stretch-draw again.Constant all the time because of the center to center distance of each anchor hole and adjacent anchor hole, so being applicable to any one anchor hole, this prestressed tensioning group anchorage single-hole limiting plate carries out frock.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. prestressed tensioning group anchorage single-hole limiting plate, described limiting plate body (1) is a cylindrical structure, along axis steel strand perforation (2) are set, it is characterized in that: the end face upper edge at described limiting plate body (1) circumferentially is evenly equipped with six back-up blocks (3), forms clip groove between adjacent two back-up blocks (3).
2. prestressed tensioning group anchorage single-hole limiting plate according to claim 1 is characterized in that: described clip groove is indent deep-slotted chip breaker (4), and the center of circle line at the arc surface place of described indent deep-slotted chip breaker (4) is parallel with the axis of limiting plate body (1).
3. prestressed tensioning group anchorage single-hole limiting plate according to claim 2, it is characterized in that: the axial line distance of the center of circle line at the arc surface place of described indent deep-slotted chip breaker (4) and limiting plate body (1) is less than 32.5mm, and the arc radius of described indent deep-slotted chip breaker (4) is greater than 15mm.
4. according to claim 1,2 or 3 described prestressed tensioning group anchorage single-hole limiting plates, it is characterized in that: the length of described six back-up blocks (3) on the axial direction of described limiting plate body (1) is 9～12mm.
5. prestressed tensioning group anchorage single-hole limiting plate according to claim 4 is characterized in that: the interior circular diameter that described six back-up blocks (3) surround is greater than 30mm, and less than 38mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102231464A CN101886477B (en) | 2010-07-09 | 2010-07-09 | Prestressed tensioning group anchorage single-hole limiting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102231464A CN101886477B (en) | 2010-07-09 | 2010-07-09 | Prestressed tensioning group anchorage single-hole limiting plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101886477A CN101886477A (en) | 2010-11-17 |
| CN101886477B true CN101886477B (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102231464A Expired - Fee Related CN101886477B (en) | 2010-07-09 | 2010-07-09 | Prestressed tensioning group anchorage single-hole limiting plate |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091169A (en) * | 2013-02-18 | 2013-05-08 | 西南大学 | Twelve-way extension test device of membrane material |
| CN107975240B (en) * | 2017-11-30 | 2020-05-01 | 中国一冶集团有限公司 | Anchor withdrawal secondary tensioning device and construction method thereof |
| CN113027138B (en) * | 2021-03-19 | 2022-09-23 | 云南省建设投资控股集团有限公司 | Steel strand inserting and guiding device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0473539A1 (en) * | 1990-08-24 | 1992-03-04 | VSL International AG | Arrangement of tension cables in a pressure gallery |
| CN201024593Y (en) * | 2007-04-20 | 2008-02-20 | 开封市红桥锚机有限公司 | Radial inflow type anchorage system anchor plate |
| CN201033945Y (en) * | 2007-03-05 | 2008-03-12 | 柳州欧维姆机械股份有限公司 | Short strand wire stretching stopping means |
| CN201318027Y (en) * | 2008-12-12 | 2009-09-30 | 董光辉 | Stretching prestressed strand coupler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3565348B2 (en) * | 2002-05-08 | 2004-09-15 | 住友電工スチールワイヤー株式会社 | Wedge for anchoring PC steel |
-
2010
- 2010-07-09 CN CN2010102231464A patent/CN101886477B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0473539A1 (en) * | 1990-08-24 | 1992-03-04 | VSL International AG | Arrangement of tension cables in a pressure gallery |
| CN201033945Y (en) * | 2007-03-05 | 2008-03-12 | 柳州欧维姆机械股份有限公司 | Short strand wire stretching stopping means |
| CN201024593Y (en) * | 2007-04-20 | 2008-02-20 | 开封市红桥锚机有限公司 | Radial inflow type anchorage system anchor plate |
| CN201318027Y (en) * | 2008-12-12 | 2009-09-30 | 董光辉 | Stretching prestressed strand coupler |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-27821A 2004.01.29 |
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| CN101886477A (en) | 2010-11-17 |
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