CN108643454B - In-vivo single-beam sealed prestress group anchor system and construction method thereof - Google Patents
In-vivo single-beam sealed prestress group anchor system and construction method thereof Download PDFInfo
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- CN108643454B CN108643454B CN201810785628.5A CN201810785628A CN108643454B CN 108643454 B CN108643454 B CN 108643454B CN 201810785628 A CN201810785628 A CN 201810785628A CN 108643454 B CN108643454 B CN 108643454B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Abstract
The in-vivo single-beam sealed prestress group anchor system comprises a protective cover assembly, a working clamping piece, a sealing anchor plate assembly, an anchor backing plate, a plurality of single-beam sealed prestress ribs and pre-buried pore canals, wherein the sealing anchor plate assembly comprises a working anchor plate, a rubber taper sleeve, a plastic limit sleeve and a compacting plate; the rubber taper sleeve is of a multi-piece wedge-shaped rubber ring structure, and the plastic limit sleeve is a hollow round sleeve with steps and different diameters; in the installation state, each prestress rib respectively penetrates through the compression plate, the plastic limiting sleeve, the rubber taper sleeve positioned in the taper hole II and the taper hole I of the working anchor plate, the working clamping piece clamps the prestress rib, and the rubber taper sleeve is tightly pressed and matched with the taper hole II of the working anchor plate and the rubber taper sleeve is tightly pressed and matched with the PE sheath of the prestress rib; the group anchor system is mainly used for working conditions of the replaceable prestressed tendons in the vertical body, the exposed parts of the PE sheaths of the prestressed tendons are effectively and hermetically connected through the sealing anchor plate assembly, the prestressed tendons are effectively sealed and preserved, the construction is simple, and the operability is strong.
Description
Technical Field
The invention relates to an in-vivo sealed prestress group anchor system and a construction method thereof, in particular to an in-vivo single-beam sealed prestress group anchor system and a construction method thereof.
Background
In a post-tensioned prestressed concrete structure, in order to ensure long-term reliability of the prestressed tendon in a high-stress state, effective corrosion prevention is carried out on the prestressed tendon, a monofilament spraying epoxy coating technology is generally adopted at present to protect a steel wire, and then the single-beam prestressed tendon is protected through an outer wrapping grease and a PE sheath, so that the 3-fold protection effect on the prestressed steel wire is achieved.
However, the three layers of protection are damaged at the clamping position of the anchor head, no matter the extrusion type anchor or the clamping piece type anchor is damaged by the environment due to the damage of a protection medium, so that a protection cover and a sealing device are added at the anchor head to protect the PE sheath stripped part at the clamping position in an anti-corrosion way, the sealing device usually fills the anti-corrosion medium in a cylinder to carry out integral sealing protection on a plurality of bundles of prestressed tendons, for example, the invention patent adopts a single sealed stay cable anchor (patent publication No. CN 106638309A, figure 10), and the sealing device is sealed by the cooperation and connection of a sealing cylinder, a positioning plate, a compression ring and a steel strand sleeve, and fills a large amount of easily-solidified slurry into the sealing cylinder for anti-corrosion, so that the sealing device has the defects of needing to be prefabricated in advance, having large occupied space, large filling anti-corrosion material amount and high manufacturing cost. If the structure is applied to an in-vivo prestress structure, the diameter of a reserved pore canal of the structure can be increased, the structural strength is weakened, and the installation and construction are inconvenient.
Disclosure of Invention
The invention aims at: the single-beam sealing unbonded anchoring system is applied to the prestressed concrete structure body and does not need to be protected by sealing anchors, and the unbonded prestressed tendons are effectively connected and protected in a sealing mode through the sealing anchor plate assembly to remove the PE sheath, so that each beam of prestressed tendons are isolated from the environment, and the technical problem is solved.
The technical scheme for solving the problems is as follows: the utility model provides an internal sealed prestressing force crowd anchor system of single bundle, includes safety cover subassembly, work clamping piece, anchor slab, anchor backing plate, m unbonded prestressing tendons, pre-buried pore, its characterized in that: the unbonded prestressed tendons are single-beam sealed prestressed tendons, the anchor plate is a sealed anchor plate assembly, the sealed anchor plate assembly comprises a working anchor plate, a rubber taper sleeve, a plastic limit sleeve and a compression plate, one end of the working anchor plate is provided with a taper hole I for installing a clamping piece, the other end of the working anchor plate is provided with a groove, the compression plate is positioned in the groove, and the tail part of a straight hole in the working anchor plate is provided with a taper hole II;
the rubber taper sleeve is of a multi-piece wedge-shaped rubber ring structure, the plastic limit sleeve is a hollow round sleeve with steps and different diameters, and each wedge-shaped rubber block on the rubber taper sleeve is limited by a corresponding clamping groove on the plastic limit sleeve and can only perform radial displacement;
in the installation state, each prestress rib respectively penetrates through the compression plate, the plastic limiting sleeve, the rubber taper sleeve positioned in the taper hole II and the taper hole I of the working anchor plate, the prestress rib is clamped by the working clamping piece, the PE sheath props against the taper hole II on the lower end surface of the working anchor plate, the working anchor plate and the compression plate are locked by the hexagonal bolt and the nut, wedge-tight fit is formed between the rubber taper sleeve and the taper hole II of the working anchor plate, and tight extrusion fit is formed between the rubber taper sleeve and the PE sheath of the prestress rib; the inner cavity in the gap between the protective cover assembly and the working anchor plate of the sealing anchor plate assembly is filled with flowable anti-corrosive medium; the value range of m is as follows: m is an integer of 2 or more.
The further technical scheme is as follows: the cone angle alpha of the rubber taper sleeve corresponds to the angle beta of the small end taper hole of the anchor plate, and the value range of the angle alpha is 10-30 degrees.
The further technical scheme is as follows: is characterized in that: an O-shaped sealing ring is arranged on the plastic limiting sleeve.
Another related technical scheme is as follows: the construction method of the in-vivo single-beam sealed prestress group anchor system comprises the following steps:
A. preparation before construction: prefabricating all parts of a sealing anchor plate assembly in a factory, wherein the parts comprise a working anchor plate, a rubber taper sleeve, a plastic limit sleeve and a compacting plate;
B. after the anchor backing plate and the pre-buried pore canal (corrugated pipe or drawing pipe) are positioned and installed, concrete is poured;
C. after the concrete reaches the required strength, the prestressed tendons pass through the pore canal, and PE sheaths at the end parts of the prestressed tendons are stripped;
D. installing a sealing anchor plate assembly:
installing the sealing anchor plate assembly on the anchor backing plate and lifting the sealing anchor plate assembly to a certain height so as to penetrate bundles;
E. beam penetration:
each prestress rib respectively passes through the compression plate, the plastic limiting sleeve, the rubber taper sleeve and the working anchor plate, and after the PE sheath is propped against the taper hole on the lower end surface of the working anchor plate, the working clamping piece is arranged to clamp the end part of the prestress rib, so that the prestress rib cannot generate displacement due to dead weight or collision;
f: locking and sealing:
after all the prestressed tendons are penetrated, the compaction plate is locked by the hexagon bolts and nuts, and the PE sheath of the prestressed tendons and the taper holes at the lower end of the anchor plate are extruded by the wedge shape of the rubber taper sleeve, so that the sealing effect is achieved;
g: the other end of the anchor adopts the same structural form, the steel strand is cut off and the PE sheath is stripped according to the requirement, and the steps D-F are repeated to finish the installation of the whole anchor;
h: one end is selected for pre-tightening and overall tensioning of the prestressed tendons;
i: after tensioning, the protective cover assemblies are arranged at the anchor heads at the two ends, and flowable anti-corrosion medium is poured into the inner cavity of the protective cover.
The construction method of the in-vivo single-beam sealed prestress group anchor system comprises the following further technical scheme: at F: and a locking and sealing step, wherein an O-shaped sealing ring is arranged on the plastic limiting sleeve.
Due to the adoption of the structure, the in-vivo single-beam sealed prestress group anchor system and the construction method thereof have the following beneficial effects:
1. independent sealing, difficult corrosion prevention failure, reliable sealing:
(1) the prestress group anchor system isolates each prestress rib from external corrosive substances by covering the whole beam with grease and providing effective sealing connection between the PE sheath and the sealing anchor plate assembly 4, thereby fully and effectively providing protection for the prestress rib.
(2) The unbonded prestressed tendons 6 realize single-beam sealing through the sealing anchor plate assembly 4, and the sealing is reliable:
the sealing anchor plate assembly 4 comprises a working anchor plate 41, a rubber taper sleeve 42, a plastic limit sleeve 43 and a compression plate 44, wherein one end of the working anchor plate 41 is provided with a taper hole I411 for installing a clamping piece, the other end of the working anchor plate 41 is provided with a groove 414, the compression plate 44 is positioned in the groove 414, the rubber taper sleeve 42 adopts a multi-piece wedge-shaped rubber ring structure, each wedge-shaped rubber block on the rubber taper sleeve 42 is limited by a corresponding clamping groove on the plastic limit sleeve 43 and can only carry out radial displacement (see figure 3), before the compression plate 44 is not tightly pressed, a sufficient aperture phi d is reserved for a prestress rib to pass through (see figures 3, 7 and 8), and after the compression plate 44 is locked, a gap JX1 between a PE sheath and the rubber taper sleeve 42 and a gap JX2 between the plastic limit sleeve 43 and the working anchor plate 41 are tightly filled, so that the sealing connection effect is achieved; the friction coefficient of the rubber ring and the PE sheath is high, and in the vertical structure, a reliable friction force can be provided to prevent the PE sheath from sliding when the steel strand is stretched or due to the dead weight of the PE sheath.
2. The construction is convenient, the operation is simple and convenient, and the construction efficiency is high;
(1) the angle alpha of the taper angle of the wedge-shaped rubber taper sleeve 42 and the angle beta of the taper hole at the small end of the anchor plate (figures 3 and 5) can be adjusted, so that the radial positive pressure applied by the rubber ring to the PE sheath during locking is adjusted, and the operation is simple and convenient.
(2) The sealing anchor plate assembly can be assembled before construction, and sealing connection can be completed only by locking (or compacting) the compacting plates after beam penetration, so that the operation is simple and convenient, and the construction efficiency is high.
(3) For the slender vertical structure of the wind tower, single prestress rib threading can be carried out, and multiple bundles of threading ropes can be adopted, so that the operation is convenient, the occupied operation space is small, and the operability is good.
3. The damage to the structure is small, and cable replacement or temporary anchoring is carried out at later period of maintenance:
(1) the pore canal is smaller, and the damage to the structure is small;
(2) the pore canal does not need to be filled with slurry to protect the prestressed tendons, so that when the prestressed tendons are abnormal, the prestressed tendons can be replaced; and cable replacement or temporary anchoring is convenient in the later period of maintenance.
(3) If the anti-corrosion medium with better fluidity is adopted, the structure can judge whether the sealing assembly fails or not by observing the residual content of the anti-corrosion medium in the protective cover assembly through naked eyes because the rubber extrusion sealing is carried out at the joint of the protective cover assembly 1 and the anchor pad 5, the joint of the sealing anchor pad assembly 4 and the anchor pad 5, the rubber taper sleeve 42, the PE sheath and the taper hole at the lower end of the anchor pad.
4. The structure is simple, the amount of the poured anti-corrosion medium is small, and the anti-corrosion effect can be achieved only by covering the anchor head by the poured anti-corrosion medium, so that the cost performance is high.
The technical features of the in-vivo single-beam sealed prestress group anchor system and the construction method thereof are further described below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic diagram of the overall architecture of an in vivo single-beam sealed prestressed group anchor system according to the present invention;
FIG. 2 is a schematic structural view of the assembled state of a sealed anchor plate assembly of the in vivo single-beam sealed prestressed group anchor system of the present invention;
fig. 3 and 4 are schematic diagrams of a combined structure of a rubber taper sleeve and a plastic limit sleeve of a sealing anchor plate assembly;
fig. 3 is a front sectional view, and fig. 4 is a left side view of fig. 3;
FIG. 5 is a schematic view of the working anchor plate structure of the seal anchor plate assembly;
FIG. 6 is a schematic view of a plastic stop collar construction of the seal anchor plate assembly;
FIG. 7 is a schematic diagram of a seal anchor plate assembly prior to tendon penetration;
FIG. 8 is a schematic structural view of a sealed anchor plate assembly after locking and sealing after tendon penetration;
fig. 9 is an enlarged view of a portion a of fig. 7;
fig. 10 is a schematic view of a single seal anchor having a multi-layer independent seal structure in accordance with the prior art.
In fig. 1-9:
1-a protective cover assembly, 2-an anti-corrosion medium, 3-a working clamping piece,
the device comprises a 4-sealing anchor plate assembly, a 41-working anchor plate, a 42-rubber taper sleeve, a 43-plastic limit sleeve, a 44-compression plate, a 45-hexagonal bolt and a 46-nut;
411-taper holes I, 412-straight holes, 413-taper holes II, 414-grooves,
5-anchor backing plate, 6-unbonded prestressed tendons, 7-pre-buried pore canal and 8-O-shaped sealing ring.
A gap between the JX 1-PE sheath and the rubber taper sleeve, a gap between the JX 2-plastic limit sleeve and the working anchor plate,
YJMF-compression seal.
In fig. 10:
1 a-protective cover assembly, 2 a-bolts, 3 a-working clamping pieces, 4 a-anchor plates, 5 a-sealing cylinders, 6 a-hardenable sizing agent, 7 a-isolating sleeves, 8 a-sealing devices II, 9 a-sealing plates, 10 a-compression rings and 11 a-unbonded prestressed tendons.
Examples
An in vivo single-beam sealed prestress group anchor system:
as shown in figure 1, the in-vivo single-beam sealed prestress group anchor system comprises a protective cover assembly 1, a working clamping piece 3, an anchor plate, an anchor backing plate 5, m unbonded prestress ribs 6 and a pre-buried duct 7;
the unbonded prestressed tendons 6 are single-beam sealed prestressed tendons, the anchor plate is a sealed anchor plate assembly 4, as shown in fig. 2, the sealed anchor plate assembly 4 comprises a working anchor plate 41, a rubber taper sleeve 42, a plastic limit sleeve 43 and a compression plate 44, one end of the working anchor plate 41 is provided with a taper hole I411 for installing a clamping piece, the other end of the working anchor plate 41 is provided with a groove 414, the compression plate 44 is positioned in the groove 414, and the tail part of a straight hole 412 in the working anchor plate is provided with a taper hole II 413 (see fig. 5);
the rubber taper sleeve 42 is of a multi-piece wedge-shaped rubber ring structure, the plastic limit sleeve 43 is a hollow round sleeve with steps and different diameters, and each wedge-shaped rubber block on the rubber taper sleeve 42 is limited by a corresponding clamping groove on the plastic limit sleeve 43 and can only perform radial displacement (see fig. 3-4);
each prestress rib respectively passes through the compression plate 44, the plastic limiting sleeve 43, the rubber taper sleeve 42 positioned in the taper hole II 413 and the taper hole I411 of the working anchor plate 41, the prestress rib is clamped by the working clamping piece, the PE sheath props against the taper hole II 413 on the lower end surface of the working anchor plate, the working anchor plate 41 and the compression plate 44 are locked by the hexagonal bolts and nuts, the rubber taper sleeve 42 and the working anchor plate taper hole II form wedge-tight fit, and the rubber taper sleeve 42 and the working anchor plate taper hole II 413, the rubber taper sleeve 42 and the prestress rib PE sheath are tightly pressed and matched; the inner cavity in the gap between the protective cover assembly 1 and the working anchor plate of the sealing anchor plate assembly 4 is filled with a flowable anti-corrosive medium 2; the value range of m is as follows: m is an integer of 2 or more.
The angle alpha of the taper angle of the rubber taper sleeve 42 corresponds to the angle beta of the small end taper hole of the anchor plate, the value range is 10-30 degrees (see fig. 3 and 5), and the radial positive pressure applied to the PE sheath by the rubber ring during locking is regulated by regulating the angle alpha of the taper angle of the rubber taper sleeve 42 and the angle beta of the small end taper hole of the anchor plate.
As an alternative to the embodiment of the present invention, an O-ring 8 (see fig. 6) may be placed on the plastic stop collar 43 to enhance the sealing effect.
Example two
A construction method of an in-vivo single-beam sealed prestress group anchor system comprises the following steps:
A. preparation before construction: prefabricating the parts of the sealing anchor plate assembly 4 in a factory, wherein the parts comprise a working anchor plate 41, a rubber taper sleeve 42, a plastic limit sleeve 43 and a compacting plate 44 (see figures 3-6);
B. after the anchor backing plate 5 and the embedded pore canal 7 (corrugated pipe or drawing pipe) are positioned and installed, concrete is poured;
C. after the concrete reaches the required strength, the prestressed tendons pass through the pore canal, and PE sheaths at the end parts of the prestressed tendons are stripped;
D. installing a sealing anchor plate assembly 4:
installing the sealing anchor plate assembly 4 on the anchor backing plate 5 and lifting a certain height so as to penetrate bundles;
E. beam penetration:
each prestress rib respectively passes through a compression plate 44, a plastic limit sleeve 43, a rubber taper sleeve 42 and a working anchor plate 41, after a PE sheath is propped against a taper hole on the lower end surface of the working anchor plate 41, a working clamping piece 3 is installed to clamp the end part of the prestress rib, so that the prestress rib cannot displace due to dead weight or collision (see figure 7);
f: locking and sealing:
after all the prestressed tendons are penetrated, the compaction plate 44 is locked through the hexagon bolts and nuts, the PE sheath of the prestressed tendons and the taper holes at the lower end of the anchor plate are extruded in a wedge-shaped manner through the rubber taper sleeve, so that a sealing effect is achieved, the plastic limit sleeve 43 is made of a material with better plasticity, tiny plastic deformation can be generated to a certain extent, and the sealing effect is achieved after extrusion (see FIG. 8);
g: the other end of the anchor adopts the same structural form (see figure 1), the steel strand is cut off and the PE sheath is stripped according to the requirement, and the steps D-F are repeated to finish the installation of the whole anchor;
h: one end is selected for pre-tightening and overall tensioning of the prestressed tendons;
i: after tensioning, the protective cover assemblies 1 are arranged at the anchor heads at the two ends, and flowable anti-corrosion medium is poured into the inner cavity of the protective cover.
At F: in the locking and sealing steps, the taper angle α of the rubber taper sleeve 42 corresponds to the angle β of the small end taper hole of the anchor plate, and the value range is 10-30 ° (see fig. 3 and 5), and the radial positive pressure applied to the PE sheath by the rubber ring during locking is adjusted by adjusting the taper angle α of the rubber taper sleeve 42 and the angle β of the small end taper hole of the anchor plate.
As an alternative to the embodiment of the present invention, an O-ring 8 may be placed on the plastic stop collar 43 to enhance the sealing effect.
Claims (5)
1. The utility model provides an internal sealed prestressing force crowd anchor system of single bundle, includes safety cover subassembly (1), work clamping piece (3), anchor slab, anchor backing plate (5), m unbonded prestressing tendons (6), pre-buried pore (7), its characterized in that: the unbonded prestressed tendons (6) are single-beam sealed prestressed tendons, the anchor plate is a sealed anchor plate assembly (4), the sealed anchor plate assembly (4) comprises a working anchor plate (41), a rubber taper sleeve (42), a plastic limit sleeve (43) and a compression plate (44), one end of the working anchor plate (41) is provided with a taper hole I (411) for installing a clamping piece, the other end of the working anchor plate (41) is provided with a groove (414), the compression plate (44) is positioned in the groove (414), and the tail part of a straight hole in the working anchor plate is provided with a taper hole II (413);
the rubber taper sleeve (42) is of a multi-piece wedge-shaped rubber ring structure, the plastic limit sleeve (43) is of a hollow round shaft sleeve with steps and different diameters, and each wedge-shaped rubber block on the rubber taper sleeve (42) is limited by a corresponding clamping groove on the plastic limit sleeve (43) to only perform radial displacement;
in the installation state, each prestress rib respectively penetrates through a compression plate (44), a plastic limiting sleeve (43), a rubber taper sleeve (42) positioned in a taper hole II (413) and a taper hole I (411) of a working anchor plate (41), the prestress rib is clamped by a working clamping piece, a PE sheath is propped against the taper hole II (413) on the lower end surface of the working anchor plate, a hexagon bolt and a hexagon nut lock the working anchor plate (41) and the compression plate (44), the rubber taper sleeve (42) and the taper hole II (413) of the working anchor plate form wedge-tight fit, and the rubber taper sleeve (42) and the taper hole II (413) of the working anchor plate are tightly pressed and matched with each other, and the rubber taper sleeve (42) and the PE sheath of the prestress rib; the inner cavity in the gap between the protective cover assembly (1) and the working anchor plate of the sealing anchor plate assembly (4) is filled with a flowable anti-corrosive medium (2); the value range of m is as follows: m is an integer of 2 or more.
2. The in vivo single beam sealed prestressed group anchor system of claim 1, wherein: the cone angle alpha of the rubber taper sleeve (42) corresponds to the angle beta of the small end taper hole of the anchor plate, and the range of the angle alpha is 10-30 degrees.
3. A single-strand sealed, prestressed group-anchor system according to claim 1 or 2, wherein: an O-shaped sealing ring (8) is arranged on the plastic limiting sleeve (43).
4. A construction method of an in-vivo single-beam sealed prestress group anchor system is characterized by comprising the following steps: it comprises the following steps:
A. preparation before construction: prefabricating all parts of a sealing anchor plate assembly (4) in a factory, wherein the parts comprise a working anchor plate (41), a rubber taper sleeve (42), a plastic limit sleeve (43) and a compacting plate (44);
B. after the anchor backing plate (5) and the embedded pore canal (7) (corrugated pipe or drawing pipe) are positioned and installed, concrete is poured;
C. after the concrete reaches the required strength, the prestressed tendons pass through the pore canal, and PE sheaths at the end parts of the prestressed tendons are stripped;
D. mounting a sealing anchor plate assembly (4):
installing the sealing anchor plate assembly (4) on the anchor backing plate (5) and lifting a certain height so as to penetrate bundles;
E. beam penetration:
each prestress rib respectively passes through a compression plate (44), a plastic limiting sleeve (43), a rubber taper sleeve (42) and a working anchor plate (41), and after a PE sheath is propped against a taper hole on the lower end surface of the working anchor plate (41), a working clamping piece (3) is arranged to clamp the end part of the prestress rib, so that the prestress rib cannot generate displacement due to dead weight or collision;
f: locking and sealing:
after all the prestressed tendons are penetrated, a compacting plate (44) is locked by a hexagonal bolt and a hexagonal nut, and a PE sheath of the prestressed tendons and a taper hole at the lower end of an anchor plate are extruded by using the wedge shape of a rubber taper sleeve, so that a sealing effect is achieved;
g: the other end of the anchor adopts the same structural form, the steel strand is cut off and the PE sheath is stripped according to the requirement, and the steps D-F are repeated to finish the installation of the whole anchor;
h: one end is selected for pre-tightening and overall tensioning of the prestressed tendons;
i: after tensioning, the protective cover assemblies (1) are arranged at the anchor heads at the two ends, and flowable anti-corrosion medium is poured into the inner cavity of the protective cover.
5. The method for constructing the in-vivo single-beam sealed prestress group anchor system, which is characterized in that: at F: and a locking and sealing step, wherein an O-shaped sealing ring (8) is arranged on the plastic limiting sleeve (43).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810785628.5A CN108643454B (en) | 2018-07-17 | 2018-07-17 | In-vivo single-beam sealed prestress group anchor system and construction method thereof |
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| CN201810785628.5A CN108643454B (en) | 2018-07-17 | 2018-07-17 | In-vivo single-beam sealed prestress group anchor system and construction method thereof |
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| CN108643454B true CN108643454B (en) | 2023-07-25 |
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| CN110258928B (en) * | 2019-06-26 | 2021-10-15 | 中国长江三峡集团有限公司 | Installation method of nut column prestressed reinforcement device |
| CN110359634A (en) * | 2019-07-25 | 2019-10-22 | 威胜利工程有限公司 | Stretching end anchorage |
| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3339125A1 (en) * | 1983-10-28 | 1985-05-15 | Philipp Holzmann Ag, 6000 Frankfurt | Two-part wedge anchorage for tendons and an apparatus with a hydraulic press for installing a fixed anchor comprising such a wedge anchorage |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20205149U1 (en) * | 2002-04-03 | 2002-07-04 | Dywidag Systems Int Gmbh | Corrosion-protected tension member, especially stay cable for a stay cable bridge |
| CN201003241Y (en) * | 2007-01-24 | 2008-01-09 | 柳州欧维姆机械股份有限公司 | Anchorage device with seal structure |
| CN103850181B (en) * | 2014-01-28 | 2016-06-01 | 柳州欧维姆机械股份有限公司 | Dismantled and assembled dragline anchorage sealed structure and realize ground tackle sealing method |
| CN206109979U (en) * | 2016-07-29 | 2017-04-19 | 安徽金星预应力工程技术有限公司 | Multiple sealed anticorrosive ground tackle |
| KR20180068707A (en) * | 2016-12-14 | 2018-06-22 | 퓨처엔지니어링 주식회사 | Apparatus and method for anchoring unbonded type tension member |
| CN106638309B (en) * | 2016-12-28 | 2018-04-24 | 柳州欧维姆机械股份有限公司 | A kind of dragline anchorage using single sealing |
| CN106835985B (en) * | 2016-12-30 | 2019-05-24 | 柳州欧维姆机械股份有限公司 | A kind of electric isolution prestress anchorage system and its construction installation method |
| CN208899750U (en) * | 2018-07-17 | 2019-05-24 | 柳州欧维姆机械股份有限公司 | A kind of prestressed group anchorage system of internal single beam sealing |
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2018
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3339125A1 (en) * | 1983-10-28 | 1985-05-15 | Philipp Holzmann Ag, 6000 Frankfurt | Two-part wedge anchorage for tendons and an apparatus with a hydraulic press for installing a fixed anchor comprising such a wedge anchorage |
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