CN114135059A - Connector and method for connecting unbonded prestressed steel strands in post-cast strip - Google Patents
Connector and method for connecting unbonded prestressed steel strands in post-cast strip Download PDFInfo
- Publication number
- CN114135059A CN114135059A CN202010921714.1A CN202010921714A CN114135059A CN 114135059 A CN114135059 A CN 114135059A CN 202010921714 A CN202010921714 A CN 202010921714A CN 114135059 A CN114135059 A CN 114135059A
- Authority
- CN
- China
- Prior art keywords
- post
- steel strand
- connector
- cast strip
- anchor plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
-
- 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
-
- 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
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention provides a connector and a method for connecting unbonded prestressed steel strands in a post-cast strip. The connector includes: the first anchor plate is arranged on one side of the post-cast strip and applies a tensile force in a first direction to the first end steel strand, and the first anchor plate is fixedly connected with the first end steel strand in the post-cast strip; the second anchor ring is fixedly connected with a second end steel strand in the post-cast strip and applies a tensioning force in a second direction to the second end steel strand; and two ends of the first anchor plate and the second anchor ring are respectively fixedly connected with the connecting structure. The steel strand and the first anchor plate are connected by the clamping piece, and the structure has low requirement on the embedding precision of the steel strand in the length direction. The anchor plate is sealed in the sleeve, is not disturbed by post-cast strip concrete pouring, and has high reliability. The anchor plate is fixed in the anchor plate hole, and the anchor plate atress is even, therefore prestressing force steel strand does not have the bending, and the reinforcing bar also can not produce normal stress in the concrete.
Description
Technical Field
The invention relates to the field of building and civil engineering, in particular to a connector and a method for connecting unbonded prestressed steel strands in a post-cast strip.
Background
Conventional prestressed reinforcement connectors, such as the L15 connector of OVM, are usually connected by using an anchor plate shared by the reinforcements on both sides. In the existing connector structure, a reinforcing steel bar on one side is anchored by a clamping piece and penetrates into an anchor plate hole; and the steel bar on the other side is anchored with the prestressed steel strand by adopting an extrusion head and is clamped into the U-shaped groove of the anchor plate. And after being tensioned, the steel strands are arranged in the protective cover and are fixed in a grouting manner.
The connectors described above are generally only suitable for use in splicing together pre-stressed tendons or tendons. When the connector is used for connecting single unbonded prestressed steel bars in a post-cast strip, the prestressed steel bars respectively connected with the two sides of the connector are buried in concrete, so the steel bar adjusting room is small, and the design of a shared anchor plate cannot be adjusted at a prestressed connecting part, so the structural freedom degree of the existing connecting machine is small, and the construction is troublesome when the adjusting steel strand is prestressed and tensioned according to the design requirement; when the anchoring extrusion head arranged in the U-shaped groove is connected with the unbonded prestressed tendon without secondary grouting, the problem that the positioning of the extrusion head is influenced by the fact that the poured casting belt concrete easily disturbs the extrusion head exists.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a connector and a method for connecting unbonded prestressed steel strands in a post-cast strip.
First, in order to achieve the above objects, there is provided a connector for connecting unbonded prestressed steel strands in a post-cast strip, comprising:
the first anchor plate is arranged on one side of the post-cast strip and fixedly connected with the first end steel strand in the post-cast strip, and tension in the first direction is applied to the first end steel strand.
And the second anchor ring is fixedly connected with a second end steel strand in the post-cast strip and applies a tension force in a second direction to the second end steel strand, wherein the second direction is opposite to the first direction.
And two ends of the connecting structure are fixedly connected with the first anchor plate and the second anchor ring respectively and are used for keeping the first-direction tension force applied by the first anchor plate to the first-end steel strand in the connecting structure and keeping the second-direction tension force applied by the second anchor ring to the second-end steel strand in the connecting structure.
Optionally, in the above-mentioned connector for connecting unbonded prestressed steel strand in post-cast strip, the connection structure includes:
and the first end of the connecting sleeve is fixedly connected with the periphery of the first anchor plate.
And the two ends of the connector are respectively arranged in the connecting sleeve and the second anchor ring and are respectively fixedly connected with the inner peripheries of the connecting sleeve and the second anchor ring.
Optionally, in the connector for connecting unbonded prestressed steel strands in the post-cast strip, the first anchor plate is a single-hole working anchor plate,
the first end of the first anchor plate is abutted to the surface of the side wall of the concrete structure on one side of the post-cast strip, the outer peripheral surface of the second end of the first anchor plate is provided with an anchor plate external thread, and the second end of the first anchor plate is in threaded connection with the first end of the connecting sleeve.
Optionally, in the connector for connecting the unbonded prestressed steel strand in the post-cast strip, the inner circumferential surface of the first end of the second anchor ring is provided with an anchor ring internal thread, and the first end of the second anchor ring is in threaded connection with the second end of the connector.
The outer peripheral surface of the first end of the connector is provided with a connector external thread, and the first end of the connector is in threaded connection with the second end of the connecting sleeve.
Optionally, in the above-mentioned connector for connecting unbonded prestress wire in post-cast strip, the centre of connector still is provided with outside bellied retainer plate, the both sides of retainer plate butt respectively the first end terminal surface of second anchor ring with connecting sleeve's second end terminal surface.
Optionally, in the connector for connecting the unbonded prestressed steel strand in the post-cast strip, the outer peripheral surfaces of the fixing ring and the second anchor ring are respectively provided with a cylindrical slotted hole, and the cylindrical slotted hole is used for installing a screw fastener to fix the connector.
Optionally, in the connector for connecting the unbonded prestressed steel strand in the post-cast strip, a first clamping piece is further arranged in the first anchor plate, and the first clamping piece is abutted between the periphery of the first end steel strand and the mounting hole in the first anchor plate.
And a second clamping piece is further arranged in the second anchor ring and is abutted between the periphery of the second end steel strand and the mounting hole in the second anchor ring.
Optionally, in the foretell connector that is arranged in post-cast strip and connects unbonded prestress wire, be formed with second end steel strand wires between second anchor ring and the connector and hold the chamber, the inboard of connector still is in the first end that second end steel strand wires held the chamber is formed with the step, second end steel strand wires hold the intracavity and still are provided with the return spring, the first end butt of return spring is on the step of connector inboard, the second end butt of return spring is used for right the extrusion force of first direction is applyed to the second clamping piece, and is fixed second end steel strand wires.
Meanwhile, in order to achieve the purpose, the invention also provides a method for connecting the unbonded prestressed steel strand in the post-cast strip, which comprises the following steps:
the method comprises the steps that after concrete strength on two sides of a post-cast strip meets design requirements, a first anchor plate is abutted to the surface of the side wall of the concrete structure on one side of the post-cast strip, the first anchor plate is fixed to the periphery of a first end steel strand in the post-cast strip, the first end steel strand is subjected to prestress tensioning according to the design requirements, and a first clamping piece is arranged between the first anchor plate and the first end steel strand to anchor the first end steel strand.
And secondly, performing anti-corrosion treatment on the structure, and then installing a connecting sleeve on the outer side of the first anchor plate.
And thirdly, fixing a second anchor ring at the periphery of a second end steel strand in the post-cast strip, arranging a second clamping piece between the second anchor ring and the second end steel strand, and anchoring the second end steel strand.
And fourthly, inserting a return spring between the second clamping piece and the connector, screwing the two ends of the connector into the connecting sleeve and the second anchor ring respectively, and fixing and pressing the return spring.
And fifthly, sealing the post-cast strip concrete, and performing pre-stressed tensioning and anchoring on the far end of the second end steel strand according to design requirements after the strength of the post-cast strip concrete meets the design requirements.
Optionally, in the above method for connecting unbonded prestressed steel strands in a post-cast strip, in the first step, before fixing the first anchor plate to the periphery of the first end steel strand in the post-cast strip, the method further includes the following steps: and removing the plastic sheath with the length of 50mm at the end of the first end steel strand, and cleaning grease.
Has the advantages that:
the invention provides a connector and a method for connecting unbonded prestressed steel strands in a post-cast strip. The connector includes: the first anchor plate is arranged on one side of the post-cast strip and applies a tensile force in a first direction to the first end steel strand, and the first anchor plate is fixedly connected with the first end steel strand in the post-cast strip; the second anchor ring is fixedly connected with a second end steel strand in the post-cast strip and applies a tensioning force in a second direction to the second end steel strand. The connector also comprises a connecting structure, and two ends of the connecting structure are fixedly connected with the first anchor plate and the second anchor ring respectively. The steel strand and the first anchor plate are connected in a clamping piece mode, and the structure has low requirement on the embedding precision of the steel strand in the length direction. The anchor plate can be sealed in the sleeve, is not interfered by the pouring of concrete of the post-pouring belt, and has high reliability. The anchor plate is fixed in the anchor plate hole, and the anchor plate atress is even, therefore prestressing force steel strand does not have the bending, and the reinforcing bar also can not produce normal stress in the concrete.
Preferably, the invention adopts a screw fastening mode to fix the anchor ring and the sleeve type connecting structure connected between the anchor ring and the anchor plate, can be used for realizing the connection of the unbonded steel stranded wires in the post-cast strip, can meet the requirement of the design tensioning sequence, and has the advantages of high reliability, convenient construction and the like. Although other connection modes such as welding or flanges can be adopted for connecting the anchor plates, the invention has the advantages of clear stress, simple and convenient construction, safety and reliability.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings 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 principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the present invention in a first direction of applied force;
FIG. 2 is a schematic view of the present invention in a second direction of force;
in the drawings, 1 denotes a first anchor plate; 21 denotes a first jaw; 22 denotes a second jaw; 3 denotes a connecting sleeve; 4 denotes a connecting head; 5 denotes a return spring; 6 denotes a second anchor ring; 71 denotes a first end strand; 72 denotes a second end strand; and 8 denotes a columnar groove hole.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" in the present invention means that the respective single or both of them exist individually or in combination.
The meaning of "inside and outside" in the present invention means that the direction toward the inside of the connector is inside and vice versa with respect to the connector itself; and not as a specific limitation on the mechanism of the device of the present invention.
The term "connected" as used herein may mean either a direct connection between the components or an indirect connection between the components via other components.
The term "first direction" as used herein means a direction from a first end strand to a second end strand, the second direction being opposite to the first direction.
A connector for connecting unbonded prestressed steel strands within a post-cast strip, comprising:
the first anchor plate 1 is arranged on one side of the post-cast strip as shown in fig. 1, and the anchor plate 1 is fixedly connected with a first end steel strand 71 in the post-cast strip and applies a tension force in a first direction to the first end steel strand. The first anchor plate 1 can specifically adopt a single-hole working anchor plate, the first end of the first anchor plate is abutted to the surface of the side wall of the concrete structure on one side of the post-cast strip, the outer peripheral surface of the second end of the first anchor plate is provided with an anchor plate external thread, and the second end of the first anchor plate 1 is in threaded connection with the first end of the connecting sleeve 3. A first clamping piece 21 is further arranged in the first anchor plate 1 and is abutted between the periphery of the first end steel strand 71 and the mounting hole in the first anchor plate 1. Under the effect of the friction force and the tension force of the first end steel strand 71, the first clamping piece is matched with the first end steel strand 71 and the first anchor plate 1 tightly, so that the anchor plate 1 is fixedly connected with the first end steel strand 71, and the first end steel strand 71 is provided with a more reliable tension force in the first direction.
The second anchor ring 6, as shown in fig. 2, is fixedly connected to the second end strand 72 of the post-cast strip and applies a tension force to the second end strand in a second direction, which is opposite to the first direction. Specifically, the inner peripheral surface of the first end of the second anchor ring 6 is provided with an anchor ring internal thread, and the first end of the second anchor ring 6 is in threaded connection with the second end of the connecting head 4. Still be provided with second clamping piece 22 in the second anchor ring 6, second clamping piece butt in the periphery of second end steel strand wires 72 with between the inside mounting hole of second anchor ring 6, under the effect of the frictional force and the pulling force of second end steel strand wires 72, second clamping piece and second end steel strand wires 72 and with closely cooperate between the second anchor ring 6, realize second anchor ring 6 and the fixed connection of second end steel strand wires 72 provide the tensile force of more reliable second direction for second end steel strand wires 72.
And two ends of the connecting structure are fixedly connected with the first anchor plate 1 and the second anchor ring 6 respectively, and the connecting structure is used for keeping a first-direction tensile force applied by the first anchor plate 1 to the first-end steel strand 71 in the connecting structure and keeping a second-direction tensile force applied by the second anchor ring 6 to the second-end steel strand 72 in the connecting structure. Wherein, the connection structure includes: and a first end of the connecting sleeve 3 is fixedly connected with the periphery of the first anchor plate 1. The connection structure further includes: and two ends of the connector 4 are respectively arranged in the connecting sleeve 3 and the second anchor ring 6 and are respectively fixedly connected with the inner peripheries of the connecting sleeve 3 and the second anchor ring 6. The connector 4 can be provided with connector external threads on the outer peripheral surfaces of the first end and the second end of the connector 4, and is in threaded connection with the second end of the connecting sleeve 3 and in threaded connection with the first end of the second anchor ring 6 respectively.
The middle of the connector 4 can be further provided with a fixing ring protruding outwards, and two sides of the fixing ring are respectively abutted to the first end face of the second anchor ring 6 and the second end face of the connecting sleeve 3. The outer peripheral surfaces of the fixing ring and the second anchor ring 6 are respectively provided with a columnar groove hole 8, and the columnar groove holes 8 are used for installing screw threads and fixing the connector.
A second end steel strand accommodating cavity is formed between the second anchor ring 6 and the connector 4, and the inner side of the connector 4 is also provided with a step at the first end of the second end steel strand accommodating cavity to form a stepped hole. The second end steel strand wires holds the intracavity and still is provided with return spring 5, the first end butt of return spring 5 is on the step of connector 4 inboard, the second end butt of return spring 5 is used for right at the tip of second clamping piece 22 the extrusion force of first direction is applyed to second clamping piece 22, and is fixed second end steel strand wires 72.
The invention provides a connector for connecting an unbonded prestressed steel strand in a post-cast strip, which is shown in figure 1 and figure 2, and mainly comprises the following components: the anchor plate comprises a single-hole working anchor plate with external threads, connecting sleeves 3 with internal threads on two sides, connectors 4 with external threads on two sides, a second anchor ring 6 with internal threads, a second clamping piece 22 matched with the second anchor ring, a first clamping piece 21 matched with the first anchor plate 1 and a return spring 5. The first anchor plate, the second anchor ring and the connecting sleeve are all rotating bodies, and cylindrical slotted holes are formed in the peripheries of the second anchor ring and the connector and used for fixing the clamp when the screw thread is installed.
In order to match the connector provided by the application, the method for connecting the unbonded prestressed steel strand in the post-cast strip is also disclosed, and comprises the following steps:
and a preparation step, namely, before installation, carrying out a destructive test on the anchorage device system according to the standard, and reserving a proper length in a post-cast strip when the unbonded prestressed reinforcement is pre-buried.
Firstly, after the concrete strength on two sides of a post-cast strip meets the design requirement, firstly removing a plastic sheath with the length of 50mm at the end of a first end steel strand 71, and cleaning grease. Then, the first anchor plate 1 can be abutted against the surface of the side wall of the concrete structure on one side of the post-cast strip, the first anchor plate 1 is fixed on the periphery of the first end steel strand 71 in the post-cast strip, the first end steel strand 71 is subjected to prestress tensioning according to design requirements, and a first clamping piece 21 is arranged between the first anchor plate 1 and the first end steel strand 71 and used for anchoring the first end steel strand 71.
And secondly, performing anti-corrosion treatment on the structure, adopting epoxy coating prestressed steel strands, embedding sand grains on the surface of the coating when manufacturing a product in order to increase the bonding force between the epoxy coating and the concrete, and then installing a connecting sleeve 3 on the outer side of the first anchor plate 1.
And thirdly, fixing the second anchor ring 6 at the periphery of the second end steel strand 72 in the post-cast strip, arranging a second clamping piece 22 between the second anchor ring 6 and the second end steel strand 72, and anchoring the second end steel strand 72.
And fourthly, inserting a return spring 5 between the second clamping piece 22 and the connector 4, screwing the two ends of the connector 4 into the connecting sleeve 3 and the second anchor ring 6 for fixing and pressing the return spring 5, and connecting the return spring 5 and the second clamping piece 22 after connection is completed. Since the second end steel strand 72 does not have the tension force in the first direction at this time, the second clamping piece 22 cannot provide enough pressure to fix the second end steel strand 72 by itself, so that the return spring 5 applies the compression force in the first direction to the second clamping piece 22 to fix the second end steel strand 72.
And fifthly, sealing the post-cast strip concrete, and performing pre-stressed tensioning and anchoring on the far end of the second end steel strand 72 according to design requirements after the strength of the post-cast strip concrete meets the design requirements, wherein the connector provides a tensioning force in the first direction for the first end steel strand 71 and provides a tensioning force in the second direction for the second end steel strand 72. The distal end here refers to the end of the second end strand 72 that is not secured.
Therefore, the invention respectively arranges the anchor plate and the anchor ring at the end of the steel strand to be connected and utilizes the screw-buckling mode to fix the anchor ring and the connecting structure between the anchor ring and the anchor plate. The fixing mode can be used for conveniently operating according to the requirement of a designed tensioning sequence during construction, has the characteristics of high reliability and convenience in construction, and has lower requirement on the embedding precision of the steel strand in the length direction. In addition, the anchor plate and the connecting structure are sealed in the sleeve and are not interfered by post-cast strip concrete pouring, so that the connector provided by the invention has high reliability. The anchor plate is fixed in the anchor plate hole, and the stress of the anchor plate is uniform and definite, so that the prestressed steel strand is not bent, and normal stress cannot be generated in concrete.
The above are merely embodiments of the present invention, which are described in detail and with particularity, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the present invention, and these changes and modifications are within the scope of the present invention.
Claims (10)
1. A connector for connecting unbonded prestressed steel strands in a post-cast strip, comprising:
the first anchor plate (1) is arranged on one side of the post-cast strip, the first anchor plate (1) is fixedly connected with a first end steel strand (71) in the post-cast strip, and a tension force in a first direction is applied to the first end steel strand;
the second anchor ring (6) is fixedly connected with a second end steel strand (72) in the post-cast strip and applies tension force in a second direction to the second end steel strand, and the second direction is opposite to the first direction;
and two ends of the connecting structure are fixedly connected with the first anchor plate (1) and the second anchor ring (6) respectively, and the connecting structure is used for keeping a first-direction tensile force applied to the first-end steel strand (71) in the first anchor plate (1) and keeping a second-direction tensile force applied to the second-end steel strand (72) in the second anchor ring (6).
2. The connector for connecting unbonded prestressed steel strands within a post-cast strip of claim 1, wherein said connecting structure comprises:
a connecting sleeve (3) having a first end fixedly connected to the outer periphery of the first anchor plate (1);
and the two ends of the connector (4) are respectively arranged in the connecting sleeve (3) and the second anchor ring (6) and are respectively fixedly connected with the inner peripheries of the connecting sleeve (3) and the second anchor ring (6).
3. The connector for connecting unbonded prestressed steel strands in post-cast strips as claimed in claim 2, wherein said first anchor plate (1) is a single hole working anchor plate,
the first end of the first end is abutted against the surface of the side wall of the concrete structure at one side of the post-cast strip,
the outer peripheral surface of the second end of the connecting sleeve is provided with an anchor plate external thread, and the second end of the first anchor plate (1) is in threaded connection with the first end of the connecting sleeve (3).
4. The connector for connecting unbonded prestressed steel strands in a post-cast strip according to claim 3, wherein the second anchor ring (6) has an inner anchor ring thread formed on the inner circumferential surface of the first end thereof, and the first end of the second anchor ring (6) is threadedly connected to the second end of the connector (4);
the outer peripheral surface of connector (4), its first end is provided with the connector external screw thread, the first end of connector (4) with the second end threaded connection of connecting sleeve (3).
5. The connector for connecting unbonded prestressed steel strands in a post-cast strip according to claims 1-4, wherein a fixing ring protruding outwards is further arranged in the middle of the connecting head (4), and two sides of the fixing ring abut against the first end face of the second anchor ring (6) and the second end face of the connecting sleeve (3), respectively.
6. The connector for connecting unbonded prestressed steel strands in post-cast strips according to claims 1-5, wherein the outer peripheral surfaces of the retaining ring and the second anchor ring (6) are further provided with cylindrical slots (8), respectively, and the cylindrical slots (8) are used for installing screw fasteners to fix the connector.
7. The connector for connecting unbonded prestressed steel strands in a post-cast strip according to claim 1, wherein a first clamping piece (21) is further arranged in the first anchor plate (1), and the first clamping piece abuts between the outer periphery of the first end steel strand (71) and the mounting hole in the first anchor plate (1);
a second clamping piece (22) is further arranged in the second anchor ring (6) and is abutted between the periphery of the second end steel strand (72) and the mounting hole in the second anchor ring (6).
8. The connector for connecting unbonded prestressed steel strands in post-cast strips according to claims 1-7, wherein a second end steel strand accommodating cavity is formed between the second anchor ring (6) and the connector (4), a step is further formed at the first end of the second end steel strand accommodating cavity at the inner side of the connector (4), a return spring (5) is further arranged in the second end steel strand accommodating cavity, the first end of the return spring (5) abuts against the step at the inner side of the connector (4), and the second end of the return spring (5) abuts against the end of the second clamping piece (22) and is used for applying extrusion force in the first direction to the second clamping piece (22) to fix the second end steel strand (72).
9. A method for connecting unbonded prestressed steel strands in a post-cast strip is characterized by comprising the following steps:
the method comprises the following steps that firstly, after the concrete strength of two sides of a post-cast strip meets the design requirement, a first anchor plate (1) is abutted against the surface of the side wall of the concrete structure on one side of the post-cast strip, the first anchor plate (1) is fixed on the periphery of a first end steel strand (71) in the post-cast strip, the first end steel strand (71) is subjected to prestress tensioning according to the design requirement, a first clamping piece (21) is arranged between the first anchor plate (1) and the first end steel strand (71), and the first end steel strand (71) is anchored;
secondly, performing anti-corrosion treatment on the structure, and then installing a connecting sleeve (3) on the outer side of the first anchor plate (1);
thirdly, fixing a second anchor ring (6) on the periphery of a second end steel strand (72) in the post-cast strip, arranging a second clamping piece (22) between the second anchor ring (6) and the second end steel strand (72) and anchoring the second end steel strand (72);
fourthly, inserting a return spring (5) between the second clamping piece (22) and the connector (4), screwing two ends of the connector (4) into the connecting sleeve (3) and the second anchor ring (6) respectively for fixing, and pressing the return spring (5);
and fifthly, sealing the post-cast strip concrete, and performing prestress tensioning and anchoring on the far end of the second end steel strand (72) according to the design requirement after the strength of the post-cast strip concrete meets the design requirement.
10. The method for joining unbonded prestressed steel strands in a post-cast strip according to claim 9, characterized in that in the first step, before fixing the first anchor plate (1) to the outer periphery of the first end strand (71) in the post-cast strip, the method further comprises the steps of: removing the plastic sheath with the end of the first end steel strand (71) being 50mm long, and cleaning grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921714.1A CN114135059A (en) | 2020-09-04 | 2020-09-04 | Connector and method for connecting unbonded prestressed steel strands in post-cast strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921714.1A CN114135059A (en) | 2020-09-04 | 2020-09-04 | Connector and method for connecting unbonded prestressed steel strands in post-cast strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114135059A true CN114135059A (en) | 2022-03-04 |
Family
ID=80438456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010921714.1A Pending CN114135059A (en) | 2020-09-04 | 2020-09-04 | Connector and method for connecting unbonded prestressed steel strands in post-cast strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114135059A (en) |
-
2020
- 2020-09-04 CN CN202010921714.1A patent/CN114135059A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212376149U (en) | Connector for connecting unbonded prestressed steel strands in post-cast strip | |
| US7841061B1 (en) | Method of forming a dead-end anchorage of a post-tension system | |
| CA1250758A (en) | Wedge anchoring system for the tensioning end of an individual prestressing element for a prestressed concrete component | |
| US5630301A (en) | Anchorage assembly and method for post-tensioning in pre-stressed concrete structures | |
| US7950196B1 (en) | Sealing trumpet for a post-tension anchorage system | |
| US6634147B2 (en) | Process for the installation and tensioning of a brace having a false bearing, in particular a stay cable for a cable-stayed bridge and anchoring device with which to carry out the process | |
| FI78760B (en) | MELLANFOERANKRINGSANORDNING FOER FOERSPAENNING AV I FLERE BYGGNADSSKEDEN FRAMSTAELLDA BYGGNADSDELAR OCH ETT FOERFARANDE FOER FRAMSTAELLNING AV EN SAODAN MELLANFOERANKRINGSANORDNING. | |
| US8087204B1 (en) | Sealing cap for intermediate anchor system | |
| US7856774B1 (en) | Sheathing-retaining wedge assembly for use with a post-tension anchorage system | |
| JP6235041B2 (en) | Rope terminal fixing method, rope with terminal fixing tool, and end fitting for use in rope terminal fixing method | |
| US4619088A (en) | Stressed reinforcing tendon and structure including such a tendon | |
| WO1997040242A1 (en) | Method and apparatus for forming an anchorage of a post-tension system | |
| US7797894B1 (en) | Apparatus and method for preventing shrinkage of a sheathing over a tendon | |
| US20060201083A1 (en) | Tensioning anchor suitable for blind-hole tendon anchoring and tendon repair | |
| US20090077913A1 (en) | Sheathing retaining cap | |
| JPS5920615A (en) | Fixer and connector for bundle stretching material for prestressed concrete | |
| US20120011788A1 (en) | Method for Strengthening a Structure and Associated Anchorage Unit | |
| CN114135059A (en) | Connector and method for connecting unbonded prestressed steel strands in post-cast strip | |
| US10995494B2 (en) | Apparatus for repairing a tension member | |
| US11078668B2 (en) | Apparatus for repairing a tension member | |
| CN109356029B (en) | CFRP rib pre-extrusion composite anchorage device | |
| JP3330107B2 (en) | Structure of anchoring part of PC steel and method of injecting buffer material in anchoring part of PC steel | |
| JP2000220254A (en) | Tension anchoring structure | |
| CN217637731U (en) | Detection apparatus for effective stress under anchor | |
| CN219241071U (en) | Slowly-bonded prestressed reinforcement structure and building structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |