CN111485678A - Connector for prestressed steel strand and use method - Google Patents
Connector for prestressed steel strand and use method Download PDFInfo
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- CN111485678A CN111485678A CN202010375537.1A CN202010375537A CN111485678A CN 111485678 A CN111485678 A CN 111485678A CN 202010375537 A CN202010375537 A CN 202010375537A CN 111485678 A CN111485678 A CN 111485678A
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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
- 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
-
- 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
- E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
-
- 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
- E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
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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
- E04G21/121—Construction of stressing jacks
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- Engineering & Computer Science (AREA)
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- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
A connector for prestressed steel strands is used in a prestressed anchoring system for sectional pouring, and steel strands are tensioned in sections by adopting a steel strand connector according to the requirements of construction procedures. The steel strand connector component structure comprises an anchor plate, a clamping piece A, an elastic compression element, an anti-falling cover plate and a clamping piece B. The connector for the prestressed steel strand can reduce the volume and the weight of the connector and reduce the processing difficulty and the manufacturing cost. The use method of the connector has the advantages that a special extruder is not needed in the construction process, the connection quality is easy to guarantee, the construction is convenient, and the prestress construction operation efficiency is convenient to improve.
Description
Technical Field
The invention relates to the technical field of prestress, in particular to a connector for a prestress steel strand and a using method of the connector.
Background
The prestress technology is widely applied to a prestressed concrete structure, and the tensile stress generated by external load on the concrete structure is offset or reduced through the prestress technology, so that the structure safety is ensured. In the prestressed anchorage system of sectional pouring, a steel strand connector is adopted to stretch prestressed steel strands in sections according to the requirements of construction procedures.
The existing multi-hole steel stranded wire connector is basically in a form of hanging extrusion anchors at the periphery of a clamping piece group anchor, and the anchor connector needs to process hanging extrusion anchor hanging grooves at the periphery of the clamping piece group anchor and leaves a lower space for hanging the extrusion anchors, so that the defects of large volume, heavy weight, large processing difficulty, high cost and the like of the anchor connector are caused. And the anchor connector needs to use a special extruder to extrude and manufacture an extruded anchor head on the steel strand on site, and the defect that the extrusion quality is difficult to control exists in the construction process.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel connector for prestressed steel strands and a using method thereof, aiming at the defects of the conventional porous steel strand connector and the using method thereof. By the connector for the prestressed steel strand and the use method, the size and the weight of the connector can be reduced, and the processing difficulty and the cost are reduced; and a special extruder is not required in construction, so that the construction is convenient, and the prestress construction operation efficiency is convenient to improve.
The technical scheme adopted by the invention is as follows:
the utility model provides a connector for prestress wire which characterized in that: comprises an anchor plate, a clamping piece A, an elastic compression element, an anti-falling cover plate and a clamping piece B; the anchor plate is cylindrical, more than 2 self-locking anchor holes for automatically anchoring the steel strand are uniformly and symmetrically arranged on the end surface A of the anchor plate, the self-locking anchor holes consist of a front section of straight hole and a rear section of taper hole from the end surface A of the anchor plate, the diameter of each straight hole is larger than the maximum size of the clamping piece A when the clamping piece A is jacked open by the steel strand and penetrates through the middle of the clamping piece, and the taper holes are used for mounting the clamping piece A; the number of pairs of the clamping pieces A is the same as that of the self-locking anchor holes on the end surface of the anchor plate A, and the clamping pieces A are loaded into the taper holes of the self-locking anchor holes from the end surface of the anchor plate A; the elastic compression element is arranged in the straight hole of the self-locking anchor hole and is tightly pressed on each pair of corresponding clamping pieces A; the anti-drop cover plate is detachably connected or welded on the end surface A of the anchor plate and is tightly pressed on the elastic compression element; more than 2 taper holes for anchoring the steel strands are uniformly and symmetrically arranged on the end face B of the anchor plate, the taper holes on the end face B of the anchor plate and the self-locking anchor holes on the end face A of the anchor plate are staggered with each other, and through holes for passing the steel strands are arranged on the anti-falling cover plate, wherein the positions and the number of the through holes are the same as those of the taper holes on the end face B of the anchor plate; the number of pairs of the clamping pieces B is the same as that of the taper holes on the end surface of the anchor plate B; during tensioning, the outer cone of the clamping piece B is matched with the cone hole on the end face of the anchor plate B, and the internal thread of the clamping piece B bites and anchors the steel strand by utilizing the wedging principle; when the steel strands are connected, the steel strands penetrate through the back hole opening of the self-locking anchor hole in the end face of the anchor plate A, the clamping piece A is pushed open to penetrate into the middle of the clamping piece, the clamping piece A clamps the steel strands under the compression force action of the elastic compression element, and the internal threads of the clamping piece A are tightly gripped to anchor the connected steel strands by utilizing the wedging principle.
Furthermore, according to the connector for the prestressed steel strand, the number of self-locking anchor holes on the end face A of the anchor plate is the same as that of taper holes on the end face B of the anchor plate.
Furthermore, the anchor plate and the anti-falling cover plate are connected through the bolts.
Furthermore, the connector for the prestress steel strand is characterized in that the elastic compression element is a cylindrical compression spring.
Furthermore, the connector for the prestressed steel strand is characterized in that a sealing cover for preventing mud from entering the self-locking anchor hole is arranged on a back orifice of the self-locking anchor hole of the anchor plate before connection and tensioning.
Further, a connector for prestressed steel strand, increase two semi-ring shape compensation gasket under the anticreep apron, eliminate the first time and stretch the steel strand and contract the prestressing force loss that causes that contracts, semi-ring shape compensation gasket diameter equals the anchor slab diameter, mesopore diameter should be able to pass through the steel strand of stretch-draw, semi-ring shape compensation gasket thickness is 4 ~ 8 mm.
A use method of a connector for prestressed steel strands comprises the following steps:
step 1: the clamping piece A is installed into a taper hole of the self-locking anchor hole from the end face of the anchor plate A; the elastic compression element is arranged in the straight hole of the self-locking anchor hole and is tightly pressed on each pair of corresponding clamping pieces A; the anti-drop cover plate is connected to the end face A of the anchor plate through a bolt and is tightly pressed on the elastic compression element.
Step 2: and the steel strand penetrates through the through hole of the anti-falling cover plate of the connector and the end face taper hole of the anchor plate B, the anti-falling cover plate of the connector is seated on the anchor backing plate, and the clamping piece B is installed in the end face taper hole of the anchor plate B.
And step 3: and mounting a limiting plate, a feed-through jack and a tool anchor plate for prestress tensioning, and anchoring the steel strand by the clamping piece B.
And 4, step 4: when the steel strands are connected, the steel strands enter from the back hole opening of the anchor plate self-locking anchor hole, the steel strands push open the clamping piece A to penetrate into the middle of the clamping piece, the clamping piece A clamps the steel strands under the compression force action of the elastic compression element, and the internal threads of the clamping piece A are tightly gripped to anchor the connected steel strands to serve as a fixed end for connection tensioning.
Further, in step 3, a measure for eliminating the retraction of the tensioned steel strand is added, specifically: before prestress tensioning, a movable cushion block supporting angle is additionally arranged in front of the straight-through jack; after the first prestress tensioning, the jack return cylinder jacks back to separate the working anchor plate from the limiting plate; the supporting angle leg of the supporting angle of the movable cushion block moves forwards and is tightly propped against the anchor backing plate, and two semi-annular cushion blocks are symmetrically arranged between the supporting angle seat and the supporting angle leg; and (4) performing secondary compensation tensioning, pulling the anchor plate away from the anchor backing plate along with the steel strand, plugging semi-annular compensation gaskets from two sides of the anchor plate, eliminating a gap between the working anchor plate and the anchor backing plate, and releasing pressure by using a jack tensioning cylinder.
The connector for the prestressed steel strand has the advantages that compared with the existing suspension type connector, the connector for the prestressed steel strand saves materials, reduces the volume and the weight of the connector, and reduces the processing difficulty and the cost; the construction does not need a special extruder, the quality is easy to control, the construction is convenient, and the prestress construction operation efficiency is convenient to improve.
Drawings
Fig. 1 is a schematic view of an embodiment of a connector for prestressed steel strands according to the present invention.
Fig. 2 is a schematic view of an embodiment of the anchor plate of the connector for prestressed steel strands according to the present invention.
FIG. 3 is a schematic drawing of the method of use of the present invention in tension.
FIG. 4 is a schematic diagram of the connection of the method of use of the present invention.
The labels in the figure are:
1, a clamping piece B; 2, anchor plate; 3, clamping piece A; 4 a cylindrical compression spring; 5, an anti-drop cover plate; 6, a hexagon socket head cap screw; 7, sealing the cover; 8, anchoring the end face of the plate A; 9 anchor plate B end face; 10 self-locking anchor holes; 11, taper holes; 12 internal threads; 13 anchoring a backing plate; 14 steel strands; 15 limiting plate; 16-through jack.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1, the present embodiment is a set of 9-hole connectors for prestressed steel strands, including 1 anchor plate, 9 pairs of clips a, 9 pairs of clips B, 9 cylindrical compression springs, 9 sealing covers, 1 anti-dropping cover plate and 3M 8 connecting bolts; the anchor plate material is 45# steel and is subjected to quenching and tempering treatment; the material of the clamping pieces is 20CrMnTi, and the clamping pieces are quenched by carbonitriding, and each pair of clamping pieces is 2 or 3; the anti-falling cover plate is made of 45# steel; the sealing cover is made of rubber; the connected steel strands are 15 series steel strands.
As shown in fig. 2, the 9-hole connector anchor plate is cylindrical with a diameter of 206 and a thickness of 80 a. The end face of the working anchor plate A is uniformly and symmetrically provided with 9 self-locking anchor holes for automatically anchoring the steel strands, the self-locking anchor holes are formed by a section of straight hole with the diameter of phi 31 and the depth of 35 and a section of taper hole with the diameter of 27 at the large end from the end face of the anchor plate A, the diameter of each straight hole is larger than the maximum size of the clamping piece A when the clamping piece A is jacked open by the steel strands and penetrates through the middle of the clamping piece, and the taper holes are used for installing the clamping piece A. The anchor plate is characterized in that 9 taper holes used for anchoring steel strands are uniformly and symmetrically arranged on the end face B of the anchor plate, the diameter of each large end is 27, and the taper holes on the end face B of the anchor plate and the self-locking anchor holes on the end face A of the anchor plate are staggered mutually. The A end face of the anchor plate is provided with 3 threaded holes connected with the anti-falling cover plate. The above dimensions are in mm.
As shown in fig. 1, the clamping piece A is installed into the taper hole of the self-locking anchor hole from the end surface of the anchor plate A; the cylindrical compression spring is arranged in a straight hole of the self-locking anchor hole and is tightly pressed on each pair of corresponding clamping pieces A; the anti-drop cover plate is connected to the end face A of the anchor plate through 3 hexagon socket head bolts and is tightly pressed on the cylindrical compression spring; 9 through holes which are used for passing through the steel strands and have the same position and quantity with the taper holes on the end surface of the anchor plate B are formed in the anti-falling cover plate.
As shown in fig. 3, during tensioning, the outer cone of the clamping piece B is matched with the cone hole on the end surface of the anchor plate B, and the internal thread of the clamping piece is used for gripping and anchoring the steel strand by utilizing the wedging principle.
As shown in fig. 4, when the steel strand is connected, the steel strand penetrates from the back orifice of the self-locking anchor hole on the end surface of the anchor plate a, the clamping piece a is pushed open to penetrate into the middle of the clamping piece, the clamping piece a is under the compression force of the cylindrical compression spring, the outer cone of the clamping piece a is matched with the conical hole in the end surface of the anchor plate a, and the internal thread of the clamping piece a bites and anchors the connected steel strand by utilizing the wedging principle.
A use method of a connector for prestressed steel strands comprises the following steps:
step 1: as shown in fig. 1, the clamping piece A is installed into the taper hole of the self-locking anchor hole from the end surface of the anchor plate A; the cylindrical compression spring is arranged in a straight hole of the self-locking anchor hole and is tightly pressed on each pair of corresponding clamping pieces A; the anti-drop cover plate is connected to the end face A of the anchor plate through 3M 8 bolts and is tightly pressed on the cylindrical compression spring.
Step 2: as shown in fig. 3, the steel strand is passed through the through hole of the anti-falling cover plate of the connector and the taper hole of the end face of the anchor plate B, the anti-falling cover plate of the connector is seated on the anchor backing plate, and the clamping piece B is installed in the taper hole of the end face of the anchor plate B.
And step 3: as shown in fig. 3, the limiting plate, the through jack and the tool anchor plate are installed for pre-stress tensioning, and the steel strand is anchored by the clamping piece B.
And 4, step 4: as shown in fig. 4, when the steel strand wires are connected, the rubber sealing cover for preventing mud from entering the anchor plate self-locking anchor hole is taken down, the steel strand wires penetrate through the back hole opening of the anchor plate self-locking anchor hole, the steel strand wires are pushed open to enable the clamping piece A to penetrate into the middle of the clamping piece, the clamping piece A clamps the steel strand wires under the compression force action of the cylindrical compression spring, and the internal threads of the clamping piece A are used for tightly gripping and anchoring the connected steel strand wires to serve as a fixed end for connection tensioning under the wedge principle. In this embodiment, the depth of the steel strand penetrating into the anchor plate is 7-8 mm.
Further, in the using method of the connector for the prestressed steel strand, in the step 3, measures for eliminating the retraction of the steel strand after tensioning are added. The method specifically comprises the following steps: 3a, before prestress tensioning, additionally arranging a movable cushion block supporting angle in front of the feed-through jack, sequentially passing a steel strand through a limiting plate, a supporting angle supporting leg, a supporting angle seat, the feed-through jack and each conical hole of a tool anchor plate, arranging a tool clamping piece in each conical hole of the tool anchor plate, and arranging an anti-dropping pressing plate on the tool anchor plate to prevent the tool clamping piece from being accidentally dropped; 3b, the anchor backing plate, the working anchor plate, the limiting plate, the angle supporting seat, the feed-through jack and the tool anchor plate are mutually attached tightly, and force is transferred through the feed-through jack and the tool anchor plate when the tool anchor plate is tensioned; the center-penetrating jack is tensioned to the designed tonnage, the jack tensioning cylinder releases pressure, and the working clamping piece in the anchor plate retracts along with the steel strand and locks and anchors the steel strand; 3c, the jack returns to the top through the return cylinder, so that the anchor plate is separated from the limiting plate; the supporting angle leg moves forwards and is tightly propped against the anchor backing plate, two semi-annular cushion blocks are symmetrically arranged between the supporting angle seat and the supporting angle leg, and the supporting angle seat, the semi-annular cushion blocks and the supporting angle leg are tightly attached; 3d, during compensation tensioning, the anchor backing plate, the supporting angle supporting leg, the semi-annular cushion block, the supporting angle seat, the feed-through jack and the tool anchor plate are tightly attached to each other, and force is transferred through the anchor backing plate, the supporting angle supporting leg, the semi-annular cushion block, the supporting angle seat, the feed-through jack and the tool anchor plate; when the feed-through jack performs compensation tensioning, the anchor plate is pulled away from the anchor backing plate along with the working clamping piece and the steel strand, a gap is generated between the working anchor plate and the anchor backing plate, when the gap between the anchor plate and the anchor backing plate can be just plugged into the compensation gasket, the semi-annular compensation gasket is plugged into the gap from two sides, the gap between the anchor plate and the anchor backing plate is eliminated, and the jack tensioning cylinder releases pressure.
In actual engineering construction, the number of steel strands connected to the two ends of most steel strand connectors is the same, and fig. 1 shows that the connectors are 9 steel strands at the front and the back. However, the number of the steel strands connected to the two ends of the steel strand connector on special occasions is different, for example, 7 steel strands are connected to 9 steel strands.
In actual engineering construction, the steel strand connector also needs to be used together with auxiliary accessories such as a protective cover, a restraining ring, a spiral rib and a corrugated pipe.
In the present invention, the clip a and the clip B are only for convenience of distinguishing the installation positions, and the same clip may be used in the actual engineering construction.
The embodiments described in this specification are only examples of implementation forms of the present invention, and the scope of protection is equivalent to the technical means that those skilled in the art can conceive of the technical features of the present invention.
Claims (8)
1. The utility model provides a connector for prestress wire which characterized in that: comprises an anchor plate, a clamping piece A, an elastic compression element, an anti-falling cover plate and a clamping piece B; the anchor plate is cylindrical, more than 2 self-locking anchor holes for automatically anchoring the steel strand are uniformly and symmetrically arranged on the end surface A of the anchor plate, the self-locking anchor holes consist of a front section of straight hole and a rear section of taper hole from the end surface A of the anchor plate, the diameter of each straight hole is larger than the maximum size of the clamping piece A when the clamping piece A is jacked open by the steel strand and penetrates through the middle of the clamping piece, and the taper holes are used for mounting the clamping piece A; the number of pairs of the clamping pieces A is the same as that of the self-locking anchor holes on the end surface of the anchor plate A, and the clamping pieces A are loaded into the taper holes of the self-locking anchor holes from the end surface of the anchor plate A; the elastic compression element is arranged in the straight hole of the self-locking anchor hole and is tightly pressed on each pair of corresponding clamping pieces A; the anti-drop cover plate is detachably connected or welded on the end surface A of the anchor plate and is tightly pressed on the elastic compression element; more than 2 taper holes for anchoring the steel strands are uniformly and symmetrically arranged on the end face B of the anchor plate, the taper holes on the end face B of the anchor plate and the self-locking anchor holes on the end face A of the anchor plate are staggered with each other, and through holes for passing the steel strands are arranged on the anti-falling cover plate, wherein the positions and the number of the through holes are the same as those of the taper holes on the end face B of the anchor plate; the number of pairs of the clamping pieces B is the same as that of the taper holes on the end surface of the anchor plate B; during tensioning, the outer cone of the clamping piece B is matched with the cone hole on the end face of the anchor plate B, and the internal thread of the clamping piece B bites and anchors the steel strand by utilizing the wedging principle; when the steel strands are connected, the steel strands penetrate through the back hole opening of the self-locking anchor hole in the end face of the anchor plate A, the steel strands are pushed open the clamping piece A to penetrate into the middle of the clamping piece, the clamping piece A clamps the steel strands under the compression force action of the elastic compression element, and the internal threads of the clamping piece A are gripped and anchored to the connected steel strands under the wedge principle.
2. The connector for prestressed steel strands as set forth in claim 1, wherein: according to the connector for the prestressed steel strand, the number of self-locking anchor holes in the end face A of the anchor plate is the same as that of conical holes in the end face B of the anchor plate.
3. The connector for prestressed steel strands as set forth in claim 1, wherein: the anchor plate is connected with the anti-falling cover plate through a bolt.
4. The connector for prestressed steel strands as set forth in claim 1, wherein: the elastic compression element is a cylindrical compression spring.
5. The connector for prestressed steel strands as set forth in claim 1, wherein: the back orifice of the self-locking anchor hole of the anchor plate is provided with a sealing cover for preventing mud from entering the self-locking anchor hole before connection and tensioning.
6. The connector for prestressed steel strands as set forth in claim 1, wherein: increase two semi-ring shape compensation gaskets under the anticreep apron, eliminate the initial tension steel strand wires and contract the prestressing force loss that causes that contracts, semi-ring shape compensation gasket diameter equals the anchor slab diameter, and the mesopore diameter should be able to pass through the steel strand wires of stretch-draw, and semi-ring shape compensation gasket thickness is 4 ~ 8 mm.
7. The use method of the connector for the prestressed steel strand is characterized by comprising the following steps of:
step 1: the clamping piece A is installed into a taper hole of the self-locking anchor hole from the end face of the anchor plate A; the elastic compression element is arranged in the straight hole of the self-locking anchor hole and is tightly pressed on each pair of corresponding clamping pieces A; the anti-drop cover plate is connected to the end surface A of the anchor plate through a bolt and is tightly pressed on the elastic compression element;
step 2: the steel strand penetrates through a through hole of an anti-falling cover plate of the connector and a taper hole of the end face of the anchor plate B, the anti-falling cover plate of the connector is seated on the anchor backing plate, and the clamping piece B is installed in the taper hole of the end face of the anchor plate B;
and step 3: mounting a limiting plate, a feed-through jack and a tool anchor plate for prestress tensioning, and anchoring the steel strand by a clamping piece B;
and 4, step 4: when the steel strands are connected, the steel strands enter from the back hole opening of the anchor plate self-locking anchor hole, the steel strands push open the clamping piece A to penetrate into the middle of the clamping piece, the clamping piece A clamps the steel strands under the compression force action of the elastic compression element, and the internal threads of the clamping piece A are tightly gripped to anchor the connected steel strands to serve as a fixed end for connection tensioning.
8. The method of claim 7, wherein the connector comprises:
in step 3, measures for eliminating the retraction of the tensioned steel strand are added, and the measures specifically comprise the following steps: before prestress tensioning, a movable cushion block supporting angle is additionally arranged in front of the straight-through jack; after the first prestress tensioning, the jack return cylinder jacks back to separate the working anchor plate from the limiting plate; the supporting angle leg of the supporting angle of the movable cushion block moves forwards and is tightly propped against the anchor backing plate, and two semi-annular cushion blocks are symmetrically arranged between the supporting angle seat and the supporting angle leg; and (4) performing secondary compensation tensioning, pulling the anchor plate away from the anchor backing plate along with the steel strand, plugging semi-annular compensation gaskets from two sides of the anchor plate, eliminating a gap between the working anchor plate and the anchor backing plate, and releasing pressure by using a jack tensioning cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010375537.1A CN111485678A (en) | 2020-05-07 | 2020-05-07 | Connector for prestressed steel strand and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010375537.1A CN111485678A (en) | 2020-05-07 | 2020-05-07 | Connector for prestressed steel strand and use method |
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| Publication Number | Publication Date |
|---|---|
| CN111485678A true CN111485678A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010375537.1A Pending CN111485678A (en) | 2020-05-07 | 2020-05-07 | Connector for prestressed steel strand and use method |
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| Country | Link |
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| CN (1) | CN111485678A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445427A (en) * | 2021-07-08 | 2021-09-28 | 北京工业大学 | Prestressed steel strand temporary stay cable integral anchor unloading device and construction process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4023242A (en) * | 1975-05-14 | 1977-05-17 | Buildinter A.G. | Connector for concrete-reinforcing tendons |
| CN2448883Y (en) * | 2000-11-13 | 2001-09-19 | 柳州欧维姆建筑机械有限公司 | Prestressed rib connector |
| CN202202483U (en) * | 2011-08-12 | 2012-04-25 | 天津市振华预应力技术有限公司 | Anti-loose self anchor connector |
| CN109137733A (en) * | 2018-08-14 | 2019-01-04 | 中铁大桥局集团有限公司 | A kind of the tensioning support device and method for stretching of low retraction anchorage |
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2020
- 2020-05-07 CN CN202010375537.1A patent/CN111485678A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4023242A (en) * | 1975-05-14 | 1977-05-17 | Buildinter A.G. | Connector for concrete-reinforcing tendons |
| CN2448883Y (en) * | 2000-11-13 | 2001-09-19 | 柳州欧维姆建筑机械有限公司 | Prestressed rib connector |
| CN202202483U (en) * | 2011-08-12 | 2012-04-25 | 天津市振华预应力技术有限公司 | Anti-loose self anchor connector |
| CN109137733A (en) * | 2018-08-14 | 2019-01-04 | 中铁大桥局集团有限公司 | A kind of the tensioning support device and method for stretching of low retraction anchorage |
Non-Patent Citations (1)
| Title |
|---|
| 蒋泽汉: "《预应力混凝土实用施工技术》", 31 July 2000, 四川科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445427A (en) * | 2021-07-08 | 2021-09-28 | 北京工业大学 | Prestressed steel strand temporary stay cable integral anchor unloading device and construction process thereof |
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