A tensioning end anchor that further reduces the amount of retraction within the allowable retraction range

Abstract

This utility model discloses a tensioning end anchorage that further reduces the amount of retraction within the allowable retraction range. Its features include: an elastic compensation component and a guiding component are provided axially between the anchor plate and the anchor ring to reduce the amount of retraction. Through the elastic compensation component, when the steel strand retracts, the elastic element generates a reverse elastic force, which acts on the anchor ring through the force transmission component, compensating for the amount of retraction of the steel strand, further reducing the amount of retraction, improving the prestress retention effect, and enhancing the safety and stability of the structure. Through the guiding component, the relative movement of the anchor ring and anchor plate is precisely guided axially, ensuring uniform force on the elastic compensation component, avoiding deviation, ensuring the elastic compensation component can function normally, and also improving the overall stability of the anchorage.

Description

Technical Field

[0001] This utility model relates to the field of anchorage technology, specifically to a tensioning end anchorage that further reduces the amount of retraction within the allowable retraction range. Background Technology

[0002] In prestressed concrete structures, the tensioning end anchor is a key component used to anchor the prestressed steel strands. After the tensioning process is completed, due to factors such as the elastic recoil of the steel strands, friction between the wedges and the steel strands, and the deformation of the anchor itself, a certain amount of recoil will occur, resulting in prestress loss. In existing technologies, although some anchors can control the recoil within the allowable range in their design, for some projects with extremely high requirements for prestressing accuracy, such as large bridges and high-rise buildings, the existing recoil may still have an adverse effect on the long-term performance and safety of the structure. Therefore, it is necessary to develop a tensioning end anchor that can further reduce the recoil within the allowable range to meet the higher requirements of engineering applications. To this end, a tensioning end anchor that further reduces the recoil within the allowable range is proposed. Utility Model Content

[0003] The purpose of this invention is to solve the above problems by proposing a tension end anchor that further reduces the amount of retraction within the allowable retraction range.

[0004] To achieve the above objectives, the following technical solution is provided: a tensioning end anchorage that further reduces the amount of retraction within the allowable retraction range, comprising an anchor plate connected to a wall, a spiral reinforcement disposed within the wall and connected to the anchor plate at one end, an anchor ring disposed on the anchor plate, and a plurality of clamps disposed within the anchor ring for fixing the steel strand, characterized in that: an elastic compensation component and a guide component for reducing the amount of retraction are provided axially between the anchor plate and the anchor ring, the elastic compensation component comprising an elastic element connected to the anchor ring and a force transmission component having one end connected to the elastic element and the other end abutting against the anchor plate.

[0005] Preferably, the guiding assembly includes a guide rod disposed on the anchor ring and a guide sleeve disposed on the anchor plate with one end sleeved outside the guide rod.

[0006] Preferably, the anchor ring is provided with a plurality of clamping grooves for accommodating clamping pieces.

[0007] Preferably, the bottom of the clamping slot is provided with a limiting ring for restricting the displacement of the clamping piece.

[0008] Preferably, the anchor plate is provided with an installation groove for installing the anchor ring, and the depth of the installation groove is greater than the thickness of the anchor ring.

[0009] Preferably, the anchor plate is provided with a pouring port.

[0010] Preferably, the surface where the clip connects to the steel strand is provided with anti-slip texture.

[0011] The beneficial effects of this utility model are as follows: By setting up the elastic compensation component, when the steel strand retracts, the elastic element can generate a reverse elastic force, which acts on the anchor ring through the force transmission component to compensate for the amount of retraction of the steel strand, further reducing the amount of retraction, improving the prestress retention effect, and enhancing the safety and stability of the structure; by setting up the guide component, the guide component accurately guides the relative movement of the anchor ring and the anchor plate in the axial direction, ensuring that the elastic compensation component is subjected to uniform force, avoiding deviation, ensuring that the elastic compensation component can play a normal role, and also improving the overall stability of the anchor.

[0012] By setting the limit ring, excessive displacement of the clamping plate during the clamping of the steel strand can be prevented, ensuring the clamping effect of the clamping plate on the steel strand, thereby reducing the increase in the amount of steel strand retraction caused by the displacement of the clamping plate.

[0013] The installation slot facilitates the installation and positioning of the anchor ring, and also provides a certain installation space for the elastic compensation component, enabling the anchor to better adapt to the retraction requirements of the steel strand under different working conditions, thus improving the versatility and applicability of the anchor.

[0014] The anti-slip texture increases the friction between the clamp and the steel strand, preventing the steel strand from sliding inside the clamp and thus effectively reducing the amount of shrinkage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the anchor plate structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the anchor ring structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the clip structure of this utility model.

[0020] Legend: 1. Anchor plate; 11. Installation groove; 12. Pouring port; 2. Spiral reinforcement; 3. Anchor ring; 31. Wedge groove; 32. Limiting ring; 4. Wedge; 41. Anti-slip texture; 5. Elastic compensation component; 51. Elastic element; 52. Force transmission component; 6. Guide component; 61. Guide rod; 62. Guide sleeve. Detailed Implementation

[0021] The following description, in conjunction with the accompanying drawings, further illustrates a tension end anchorage that further reduces the amount of retraction within the allowable retraction range, according to this utility model.

[0022] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Participation Figure 1-5 As shown, this embodiment of a tensioning end anchorage that further reduces the amount of shrinkage within the allowable shrinkage range includes an anchor plate 1 connected to a wall, a spiral reinforcement 2 disposed within the wall and connected to the anchor plate 1 at one end, an anchor ring 3 disposed on the anchor plate 1, and a plurality of clamping pieces 4 disposed within the anchor ring 3 for fixing the steel strand. The anchor plate 1 and the anchor ring 3 are characterized by an elastic compensation component 5 and a guide component 6 disposed axially between them for reducing the amount of shrinkage. The elastic compensation component 5 includes an elastic element 51 connected to the anchor ring 3 and a force transmission element 52 whose one end is connected to the elastic element 51 and whose other end abuts against the anchor plate 1. The guide component 6 includes a guide rod disposed on the anchor ring 3. The anchor rod 61 and guide sleeve 62 are set on the anchor plate 1 and one end is sleeved outside the guide rod 61; through the setting of the elastic compensation component 5, when the steel strand retracts, the elastic element 51 can generate a reverse elastic force, which acts on the anchor ring 3 through the force transmission component 52 to compensate for the retraction of the steel strand, further reducing the retraction, improving the prestress retention effect, and enhancing the safety and stability of the structure; through the setting of the guide component 6, the guide component 6 precisely guides the relative movement of the anchor ring 3 and the anchor plate 1 in the axial direction, ensuring that the elastic compensation component 5 is subjected to uniform force, avoiding deviation, ensuring that the elastic compensation component 5 can play a normal role, and also improving the overall stability of the anchor.

[0025] In one embodiment, the anchor ring 3 is provided with a plurality of clamping grooves 31 for accommodating clamping pieces 4; the bottom of the clamping grooves 31 is provided with limiting rings 32 for limiting the displacement of the clamping pieces 4; by setting the limiting rings 32, the clamping pieces 4 can be prevented from excessively displacing during the clamping of the steel strand, ensuring the clamping effect of the clamping pieces 4 on the steel strand, thereby reducing the increase in the amount of steel strand retraction caused by the displacement of the clamping pieces 4.

[0026] In one embodiment, the anchor plate 1 is provided with an installation groove 11 for installing the anchor ring 3, the depth of the installation groove 11 being greater than the thickness of the anchor ring 3; the anchor plate 1 is provided with a pouring port 12; the installation groove 11 facilitates the installation and positioning of the anchor ring 3, and also provides a certain installation space for the elastic compensation component 5, enabling the anchor to better adapt to the retraction requirements of the steel strand under different working conditions, thereby improving the versatility and applicability of the anchor.

[0027] In one embodiment, the surface of the clamp 4 that connects with the steel strand is provided with anti-slip texture 41; by setting the anti-slip texture 41, the friction between the clamp 4 and the steel strand can be increased, preventing the steel strand from sliding in the clamp 4, thereby effectively reducing the amount of retraction.

[0028] In one embodiment, both the anchor ring 3 and the anchor plate 1 are made of high-strength alloy steel. High-strength alloy steel has good strength and toughness, and can withstand large prestress, ensuring the reliability and stability of the anchor during long-term use.

[0029] In one embodiment, the elastic element 52 is a spring, the force transmission element 52 is a cylindrical pin, and the elastic element 51 can be connected to the anchor ring 3 and the force transmission element 52 by welding.

[0030] In use, the anchor plate 1 is first firmly installed on the wall, and one end of the spiral reinforcement 2 is connected to the anchor plate 1 and pre-embedded in the wall to enhance the local compressive strength of the concrete around the anchor plate 1. Next, the anchor ring 3 is installed in the mounting groove 11 of the anchor plate 1, and the guide rod 61 is inserted into the guide sleeve 62 to ensure that the anchor ring 3 is accurately positioned and can move relative to the anchor plate 1 in the axial direction. Then, the steel strand is passed through the anchor ring 3 and the clamping plate 4 in sequence, and tensioned using a tensioning device. During the tensioning process, the steel strand drives the clamping plate 4 towards the clamping plate groove. As the tensioning device moves within 31, the anti-slip texture 41 between the clamping plate 4 and the steel strand generates friction, causing the clamping plate 4 to tightly hold the steel strand. After tensioning, the steel strand generates a retraction force, and the elastic element 51 in the elastic compensation component 5 is deformed along the axial direction. The retraction force is transmitted to the anchor plate 1 through the force transmission component 52, thereby compensating for the retraction of the steel strand. At the same time, the limiting ring 32 restricts the displacement of the clamping plate 4, ensuring the anchoring effect of the clamping plate 4 on the steel strand and further reducing the retraction. Finally, concrete is poured into the pouring port 12 to cover the area around the steel strand.

[0031] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A tensioning end anchor that further reduces the amount of retraction within the allowable retraction range, comprising an anchor base plate (1) connected to a wall, a spiral rib (2) disposed in the wall and connected to the anchor base plate (1) at one end, an anchor ring (3) disposed on the anchor base plate (1), and a plurality of clamps (4) disposed in the anchor ring (3) for fixing the steel strand, characterized in that: An elastic compensation component (5) and a guide component (6) for reducing the amount of retraction are provided between the anchor plate (1) and the anchor ring (3) along the axial direction. The elastic compensation component (5) includes an elastic element (51) connected to the anchor ring (3) and a force transmission component (52) with one end connected to the elastic element (51) and the other end abutting against the anchor plate (1).

2. The tensioned end anchor of claim 1, wherein the tensioned end anchor further reduces the amount of retraction within the allowable retraction range. The guide assembly (6) includes a guide rod (61) disposed on the anchor ring (3) and a guide sleeve (62) disposed on the anchor plate (1) and one end of which is sleeved outside the guide rod (61).

3. A tensioning end anchorage according to claim 1, which further reduces the amount of retraction within the allowable retraction range, characterized in that: The anchor ring (3) is provided with several clamping grooves (31) for accommodating clamping pieces (4).

4. The tensioned end anchor of claim 3, wherein the further reduction in the amount of retraction is within the range of retraction allowed. The bottom of the clamping groove (31) is provided with a limiting ring (32) for limiting the displacement of the clamping piece (4).

5. The tensioned end anchor of claim 1, wherein the tensioned end anchor further reduces the amount of retraction within the allowable retraction range. The anchor plate (1) is provided with an installation groove (11) for installing the anchor ring (3), and the depth of the installation groove (11) is greater than the thickness of the anchor ring (3).

6. The tensioned end anchor of claim 5, wherein the further reduction in the amount of retraction is within the allowable retraction range. The anchor plate (1) is provided with a pouring port (12).

7. The tensioned end anchor of claim 1, wherein the tensioned end anchor further reduces the amount of retraction within the allowable retraction range. The clamp (4) and the steel strand connection surface are provided with anti-slip texture (41).

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