A gradient stiffness prestressed anchorage device

Abstract

The utility model relates to bridge engineering anchoring technical field discloses a gradient rigidity prestress anchorage device, including steel strand, the outer wall left side fixed connection of steel strand has the anchorage device mechanism, the anchorage device mechanism is used for continuously transmitting prestress, the outer wall left side rotationally connected of anchorage device mechanism has the tightness mechanism, the tightness mechanism is used for adjusting the tightness of steel strand rope, the outer wall all round of anchorage device mechanism is fixedly connected with fixed establishment, the outer wall all round of steel strand is fixedly connected with steel wire, the anchorage device mechanism includes fixed cylinder, the fixed cylinder fixed connection is in the outer wall left side of steel strand, in the utility model, steel strand left end passes through fixed cylinder and connects anchorage device mechanism with flange, inner wall buffer layer is fixed through bolt no.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering anchorage technology, and in particular to a gradient stiffness prestressed anchor. Background Technology

[0002] Gradient stiffness prestressed anchors are anchors whose stiffness is not constant but varies regularly with the magnitude of the load, the stage of deformation, or the location. They are mainly used in the field of anchoring prestressed concrete structures and geotechnical engineering. Through structural design and material optimization, the anchors exhibit the characteristic of stiffness changing with the load and deformation gradient during the stress process, thus more flexibly adapting to engineering needs and improving the anchoring effect.

[0003] A search revealed Chinese Patent Publication No. CN219158179U, which discloses a high-strength prestressed anchor, including an installation frame and a locking mechanism. A protective tube is installed on the rear side of the installation frame, and a reinforcing bolt passes through the outer side of the protective tube. A prestressing tendon passes through the middle of the reinforcing bolt, and a spring is provided on the outer side of the prestressing tendon. A reinforcing mechanism is provided on the side of the installation frame, and a clamping disc is provided on the inner side of the reinforcing mechanism. A single cluster of tendons passes through the middle of the clamping disc, and the locking mechanism is located on the outer side of the single cluster of tendons. This utility model is equipped with a baffle, which allows for connection and installation via multiple sets of reinforcing bolts on the outer side, further tightening the connection between the installation frame and the prestressing tendon, providing better protection at the connection point, and ensuring installation stability. Afterwards, it can be... Further end-connection and tightening are achieved by adding baffles. After installation, manually tightening the outermost fastening rod ensures the baffle is securely fastened to the surface of the clamping disc. However, in existing gradient stiffness prestressed anchors, the anchors are made of homogeneous materials, which can easily lead to sudden stress changes during steel strand tensioning, causing concrete cracking and steel strand slippage. Due to the uniform stiffness distribution of the anchors, they cannot match the stiffness of the concrete structure, resulting in discontinuous stress transmission and reduced fatigue life of the anchoring system. Traditional prestressed anchors are made of homogeneous materials, which can easily cause sudden stress changes in the anchoring zone during steel strand tensioning, leading to concrete cracking and steel strand slippage. The uniform stiffness distribution of existing anchors cannot match the stiffness of the concrete structure, resulting in discontinuous stress transmission and reduced fatigue life of the anchoring system. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a gradient stiffness prestressed anchor, which aims to improve the existing technology where stress abrupt changes easily occur in the anchorage zone during the tensioning of steel strands, and the existing anchors have a single stiffness distribution, which cannot achieve stiffness matching with the concrete structure, resulting in discontinuous stress transmission and reduced fatigue life of the anchorage system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gradient stiffness prestressed anchor, comprising a steel strand, an anchor mechanism fixedly connected to the left side of the outer wall of the steel strand, the anchor mechanism being used to continuously transmit prestress, a tensioning mechanism rotatably connected to the left side of the outer wall of the anchor mechanism, the tensioning mechanism being used to adjust the tension of the steel strand, fixing mechanisms fixedly connected to all four sides of the outer wall of the anchor mechanism, and steel wires fixedly connected to all four sides of the outer wall of the steel strand; the anchor mechanism includes a fixing cylinder, the fixing cylinder being fixedly connected to the left side of the outer wall of the steel strand, a flange fixedly connected to the right side of the outer wall of the fixing cylinder, a buffer layer fixedly connected to the middle of the inner wall of the fixing cylinder, a bolt fixedly connected to the left side of the outer wall of the buffer layer, a connecting ring being provided on one side of the outer wall of the bolt, and a clamping assembly fixedly connected to the middle of the inner wall of the fixing cylinder.

[0006] The above technical solution utilizes a steel strand as the core load-bearing component, fixed and transmitting prestress through an anchoring mechanism. A tensioning mechanism adjusts the tension, a fixing mechanism provides external fixation, and steel wire enhances overall integrity. All components are mechanically connected to form a complete force transmission path. A fixing cylinder is fitted onto the left end of the steel strand and fixed to the external structure via a flange, forming an anchoring foundation. The flange provides the installation interface, connecting to the component via bolts to ensure stable anchor positioning. A buffer layer, located on the inner wall of the fixing cylinder and fixed with bolts, absorbs vibration and impact, preventing stress concentration. A connecting ring, mating with bolts, is used for hoisting or auxiliary positioning, improving construction convenience.

[0007] As a further description of the above technical solution:

[0008] The clamping assembly includes a clamping piece, which is fixedly connected to the middle of the inner wall of the fixed cylinder. Dispersion grooves are formed around the outer wall of the clamping piece. A diffuser plate is rotatably connected to one side of the outer wall of the clamping piece, and a spring is fixedly connected to the other side of the inner wall of the diffuser plate. A latch is rotatably connected to the middle of the inner wall of the clamping piece, and a locking tongue is rotatably connected to the middle of the inner wall of the fixed cylinder. The locking tongue engages with the latch.

[0009] The above technical solution involves a clamping assembly consisting of clamping plates, which are fixed to the middle of the inner wall of the fixing cylinder. The outer wall has a dispersion groove, and a diffuser plate is connected to one side of the clamping plate. A spring is fixed inside the diffuser plate. There is a latch in the middle of the inner wall of the clamping plate and a locking tongue in the middle of the inner wall of the fixing cylinder. The two can be engaged.

[0010] As a further description of the above technical solution:

[0011] The tightening mechanism includes a fixing ring, which is fixedly connected to the left side of the outer wall of the fixing cylinder. A fixing groove is provided in the middle of the inner wall of the fixing ring. A rotating shaft is rotatably connected to the middle of the inner wall of the fixing ring. Sliding components are rotatably connected to the outer walls of the rotating shaft.

[0012] The above technical solution achieves the tension adjustment function through the transmission of the rotating shaft and pulley. The rotating shaft is connected to the center of the fixed ring and has the ability to rotate, thereby driving the sliding component to move synchronously to adjust the tension.

[0013] As a further description of the above technical solution:

[0014] The sliding assembly includes a fixed frame, which is fixedly connected to the outer wall of the rotating shaft. Rotating frames are rotatably connected to the outer wall of the fixed frame on opposite sides. A rotating shaft is rotatably connected to the middle of the inner wall of the rotating frame. A pulley is rotatably connected to the right side of the outer wall of the fixed frame.

[0015] The above technical solution involves a pulley connected to a fixed frame via a rotating frame, with its axis perpendicular to the swing direction of the rotating frame. When the rotating frame is extended, the pulley slides on the inner wall of the fixed ring, increasing tension. The fixed groove restricts the movement of the rotating frame. A rope passes around the pulley, and the rotating shaft drives the pulley to move radially, adjusting the tension. The pulley design reduces energy loss and is suitable for occasions requiring frequent tension adjustments. The components are symmetrically distributed, resulting in high space utilization and easy integration.

[0016] As a further description of the above technical solution:

[0017] The fixing mechanism includes a support plate, which is fixedly connected to the outer wall of the fixing cylinder. Positioning plates are fixedly connected to all four sides of the outer wall of the support plate, and a buffer assembly is fixedly connected to the right side of the outer wall of the support plate.

[0018] The above technical solution uses a support plate as the core of the fixing mechanism. Through the collaboration of multiple components, it achieves stable fixing and buffer protection. The support plate is connected to the fixing cylinder, and the positioning plates around the perimeter enhance the stability of the foundation.

[0019] As a further description of the above technical solution:

[0020] The buffer assembly includes a gasket, which is fixedly connected to the right side of the outer wall of the support plate, and two bolts are threaded around the outer wall of the gasket.

[0021] The above technical solution involves using gaskets in the buffer assembly, which are bolted on to absorb impact and reduce vibration transmission.

[0022] As a further description of the above technical solution:

[0023] A fixing plate is slidably connected to one side of the inner wall of the fixing groove, and a protective sleeve is fixedly connected to the middle of the inner wall of the fixing plate.

[0024] The above technical solution uses a fixing plate and a protective sleeve in the fixing groove to limit and protect the object.

[0025] As a further description of the above technical solution:

[0026] A diffuser plate is fixedly connected to the left side of the outer wall of the fixed cylinder, and connecting plates are fixedly connected to all four sides of the outer wall of the diffuser plate.

[0027] Through the above technical solution, the bottom plate on the left side of the fixed cylinder cooperates with the connecting plate to distribute the force to the surrounding structure, prevent local stress concentration, and ensure that the fixing mechanism is both stable and protective when fixing objects.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the left end of the steel strand is connected to the anchor mechanism through a fixed sleeve flange. The inner wall buffer layer is fixed by bolts. The clamping plate of the clamping component clamps the steel strand by the dispersion groove. The spring, lock, and locking tongue cooperate to achieve self-locking after tensioning. The tensioning mechanism is connected to the left side of the anchor and can adjust the tension of the steel strand. The fixing mechanism fixes the anchor around. The whole assembly achieves reliable transmission and dynamic control of prestress through clamping of the clamping plate, locking of the lock, and energy absorption and tension adjustment of the buffer layer.

[0030] 2. In this utility model, the fixing ring is connected to the left side of the fixing cylinder. The rotating shaft on its inner wall drives the surrounding sliding components. In the sliding components, the fixing frame rotates with the rotating shaft, and the rotating frame swings around the rotating shaft, causing the right pulley to move radially. When the pulley moves outward, the external rope component is tightened, and when it moves inward, it is relaxed. The tension is adjusted by rotating the rotating shaft. The fixing groove on the inner wall of the fixing ring can limit the range of motion of the pulley. The mechanism is compact and flexible in adjustment. Attached Figure Description

[0031] Figure 1 This is a perspective view of a gradient stiffness prestressed anchor proposed in this utility model;

[0032] Figure 2 This is a front view of a gradient stiffness prestressed anchor proposed in this utility model;

[0033] Figure 3 This is a structural exploded view of a gradient stiffness prestressed anchor proposed in this utility model;

[0034] Figure 4 This is a partial structural breakdown diagram of a gradient stiffness prestressed anchor proposed in this utility model;

[0035] Figure 5 This is a partial structural diagram of a gradient stiffness prestressed anchor proposed in this utility model.

[0036] Legend:

[0037] 1. Steel strand; 2. Anchor mechanism; 201. Fixing cylinder; 202. Flange; 203. Buffer layer; 204. Bolt 1; 205. Connecting ring; 206. Clamping assembly; 2061. Clamping plate; 2062. Dispersion groove; 2063. Diffuser plate; 2064. Spring; 2065. Lock; 2066. Locking tongue; 3. Tightening mechanism; 301. Fixing ring; 302. Fixing groove; 303. Rotating shaft; 304. Sliding assembly; 3041. Fixing frame; 3042. Rotating frame; 3043. Rotating shaft; 3044. Pulley; 4. Fixing mechanism; 401. Support plate; 402. Positioning plate; 403. Buffer assembly; 4031. Gasket; 4032. Bolt 2; 5. Steel wire; 6. Fixing plate; 7. Protective sleeve; 8. Connecting plate; 9. Base plate. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a gradient stiffness prestressed anchor, comprising a steel strand 1, an anchor mechanism 2 fixedly connected to the left side of the outer wall of the steel strand 1, the anchor mechanism 2 being used to continuously transmit prestress, a tensioning mechanism 3 rotatably connected to the left side of the outer wall of the anchor mechanism 2, the tensioning mechanism 3 being used to adjust the tension of the steel strand, fixing mechanisms 4 fixedly connected to all four sides of the outer wall of the anchor mechanism 2, and steel wires 5 fixedly connected to all four sides of the outer wall of the steel strand 1; the anchor mechanism 2 includes a fixing cylinder 201, the fixing cylinder 201 being fixedly connected to the left side of the outer wall of the steel strand 1, a flange 202 fixedly connected to the right side of the outer wall of the fixing cylinder 201, and a buffer layer 203 fixedly connected to the middle of the inner wall of the fixing cylinder 201, the buffer layer 203... Bolt 204 is fixedly connected to the left side of the outer wall. A connecting ring 205 is provided on one side of the outer wall of bolt 204. A clamping assembly 206 is fixedly connected to the middle of the inner wall of the fixing cylinder 201. The clamping assembly 206 includes a clamping piece 2061, which is fixedly connected to the middle of the inner wall of the fixing cylinder 201. Dispersion grooves 2062 are provided around the outer wall of the clamping piece 2061. A diffuser plate 2063 is rotatably connected to one side of the outer wall of the clamping piece 2061. A spring 2064 is fixedly connected to the other side of the inner wall of the diffuser plate 2063. A latch 2065 is rotatably connected to the middle of the inner wall of the clamping piece 2061. A locking tongue 2066 is rotatably connected to the middle of the inner wall of the fixing cylinder 201. The locking tongue 2066 engages with the latch 2065.

[0040] Specifically, the steel strand 1 is the core load-bearing component, fixed and transmitting prestress through the anchor mechanism 2. The tensioning mechanism 3 adjusts the tension, the fixing mechanism 4 provides external fixation, and the steel wire 5 enhances the overall integrity. All components are mechanically connected to form a complete force transmission path. The fixing cylinder 201 is fitted onto the left end of the steel strand 1 and fixed to the external structure through the flange 202, forming an anchoring foundation. The flange 202 provides the installation interface and is connected to the component through bolts to ensure stable anchor positioning. The buffer layer 203 is located on the inner wall of the fixing cylinder 201 and fixed by bolt 204 to absorb vibration and impact, avoiding stress concentration. The connecting ring 205 cooperates with bolt 204 for hoisting or auxiliary positioning, improving construction convenience. The inner wall of the clamp 2061 holds the steel strand 1, and the dispersion groove 2062 increases friction to prevent slippage. The locking buckle 2065 and the locking tongue 2065... 66 engages to lock the position of clamp 2061, preventing prestress relaxation. During tensioning, external force pulls the steel strand 1, causing clamp 2061 to slide and tighten within the tapered hole, while spring 2064 compresses and stores energy. After tensioning to the desired position, latch 2065 engages with locking tongue 2066 to fix the position of clamp 2061, transferring the tension of steel strand 1 to fixed cylinder 201 and flange 202. Manually rotating the housing of tensioning mechanism 3 drives the fixed cylinder 201 axially through internal threads or gear transmission, stretching or relaxing steel strand 1. When hydraulically or electrically driven, the fixed cylinder 201 is pushed through a piston or motor screw to achieve stepless tension adjustment. Fixing mechanism 4 is fixed around the fixed cylinder 201 and connected to the concrete formwork, steel structure, or other carriers by welding or bolting, ensuring the anchor remains stable during tensioning and preventing displacement from affecting prestress accuracy.

[0041] Reference Figure 1 , Figure 2 and Figure 5 The tensioning mechanism 3 includes a fixed ring 301, which is fixedly connected to the left side of the outer wall of the fixed cylinder 201. A fixed groove 302 is provided in the middle of the inner wall of the fixed ring 301. A rotating shaft 303 is rotatably connected to the middle of the inner wall of the fixed ring 301. Sliding components 304 are rotatably connected to all four sides of the outer wall of the rotating shaft 303. The sliding components 304 include a fixed frame 3041, which is fixedly connected to all four sides of the outer wall of the rotating shaft 303. A rotating frame 3042 is rotatably connected to the outer wall of the fixed frame 3041 on the side away from each other. A rotating shaft 3043 is rotatably connected to the middle of the inner wall of the rotating frame 3042. A pulley 3044 is rotatably connected to the right side of the outer wall of the fixed frame 3041.

[0042] Specifically, the working principle of the tensioning mechanism 3 is based on the drive of the rotating shaft 303 and the transmission of the pulley 3044. Tension adjustment is achieved through a mechanical structure. The rotating shaft 303 is rotatably connected to the middle of the fixed ring 301 and can be driven to rotate by external power. When the rotating shaft 303 rotates, the sliding component 304 moves synchronously, changing the tension state. The fixed frame 3041 rotates with the rotating shaft 303, and the rotating frame 3042 can swing around the rotating shaft 3043, changing the radial distance between it and the fixed ring 301. The pulley 3044 is rotatably connected to the right side of the fixed frame 3041, and its axis is perpendicular to the swing direction of the rotating frame 3042. The rotating frame 3042 swings outwards. When unfolded, pulley 3044 slides along the inner wall of fixed ring 301, increasing tension; fixed groove 302 is used to position or limit the movement range of rotating frame 3042. When external ropes or components pass around pulley 3044 and rotating shaft 303 drives pulley 3044 to move radially, the rope is tightened or loosened, and pulley 3044 maintains its current position, maintaining the set tension value. Continuous rotation of rotating shaft 303 can precisely control the tension and adapt to different load requirements. The rolling friction design of pulley 3044 reduces energy loss and is suitable for scenarios where tension needs to be frequently adjusted. The components are symmetrically distributed, with high space utilization, making it easy to integrate into various types of equipment.

[0043] Reference Figure 1 , Figure 2 and Figure 3 The fixing mechanism 4 includes a support plate 401, which is fixedly connected to the outer wall of the fixing cylinder 201. Positioning plates 402 are fixedly connected to the outer wall of the support plate 401. A buffer assembly 403 is fixedly connected to the right side of the outer wall of the support plate 401. The buffer assembly 403 includes a gasket 4031, which is fixedly connected to the right side of the outer wall of the support plate 401. Bolts 4032 are threaded around the outer wall of the gasket 4031. A fixing plate 6 is slidably connected to one side of the inner wall of the fixing groove 302. A protective sleeve 7 is fixedly connected to the middle of the inner wall of the fixing plate 6. A bottom plate 9 is fixedly connected to the left side of the outer wall of the fixing cylinder 201. Connecting plates 8 are fixedly connected to the outer wall of the bottom plate 9.

[0044] Specifically, the fixing mechanism 4 is centered on the support plate 401. Through the collaboration of multiple components, it achieves stable fixing and buffer protection. The support plate 401 is connected to the fixing cylinder 201, and the positioning plates 402 connected around the perimeter enhance the stability of the foundation. In the buffer component 403 on the right, the gasket 4031 is installed by bolt 4032, which can absorb external impacts and reduce vibration transmission. The fixing plate 6 and protective sleeve 7 in the fixing groove 302 can limit and protect the object to be fixed. The bottom plate 9 on the left side of the fixing cylinder 201, together with the connecting plate 8, can distribute the force to the surrounding structure, avoid local stress concentration, and ensure that the fixing mechanism 4 has both stability and protection when fixing objects.

[0045] Working principle: The steel strand 1 serves as the core load-bearing component, fixed and transmitting prestress through the anchor mechanism 2. The tensioning mechanism 3 adjusts the tension of the steel strand 1, the fixing mechanism 4 provides external fixation, the steel wire 5 enhances the integrity of the steel strand 1, and the fixing cylinder 201 is sleeved on the left end of the steel strand 1 and fixed to the external structure through the flange 202, forming an anchoring foundation. The flange 202 provides an installation interface and can be connected to the component via bolts, ensuring the overall stable positioning of the anchor. The buffer layer 203, a gradient material, is located on the inner wall of the fixing cylinder 201, allowing for... The steel strand 1 is fixed by bolt 204 to absorb vibration and impact during tensioning and avoid stress concentration. Connecting ring 205 mates with bolt 204 and may be used for hoisting or auxiliary positioning, improving construction convenience. Clamping piece 2061 directly clamps the steel strand 1 on its inner wall. Distributing groove 2062 increases friction and prevents slippage. Locking buckle 2065 engages with locking tongue 2066 to lock the position of clamping piece 2061 after tensioning to prevent prestress relaxation. During tensioning, external force pulls the steel strand 1, and clamping piece 2061 remains within the conical hole. The spring 2064 compresses and stores energy by sliding and tightening similar to a wedge principle. After tensioning to the desired position, the latch 2065 engages with the tongue 2066, fixing the position of the clamp 2061 and transmitting the tension of the steel strand 1 to the fixed cylinder 201 and flange 202. The outer shell of the tensioning mechanism 3 is manually rotated, and the fixed cylinder 201 is moved axially through internal threads or gear transmission, stretching or relaxing the steel strand 1. When hydraulically or electrically driven, the fixed cylinder 201 is pushed by a piston or motor screw to achieve stepless tension adjustment. The fixing mechanism 4 is fixed around the fixed cylinder 201 and connected to the concrete template, steel structure, or other carriers by welding or bolting to ensure that the anchor remains stable during tensioning, avoids displacement affecting the prestress accuracy, achieves layer-by-layer absorption of impact energy, and improves the durability of the anchor. The mechanical engagement structure of the latch 2065 and tongue 2066, compared with the traditional clamp 2061 type anchor, adds an anti-loosening safety, is suitable for high stress or vibration environments, allows for secondary adjustment of prestress in the later stage, and meets the needs of long-term structural monitoring and maintenance.

[0046] The tension of the steel strand is evenly distributed to the clamping plate 2061 assembly through the groove; the gradient buffer layer 203 absorbs the stress peak by elastic deformation in each modulus segment in sequence; the multi-curved diffuser plate 2063 converts the remaining stress into multi-directional wave energy and disperses it; the composite layer dissipates vibration energy through interlayer shear deformation. The working principle of the tensioning mechanism 3 is based on the drive of the rotating shaft 303 and the transmission of the pulley 3044. The rotating shaft 303 is rotatably connected to the middle of the fixed ring 301. By driving it to rotate, when the rotating shaft 303 rotates, it drives the sliding assembly around it. The synchronous movement of component 304 changes the overall tension of the mechanism. The fixed frame 3041 is fixed to the outer wall of the rotating shaft 303 and rotates in a circular motion with the shaft 303. The rotating frame 3042 is hinged to the fixed frame 3041 via the rotating shaft 3043 and can swing around the shaft 3043. When the fixed frame 3041 rotates with the shaft 303, the rotating frame 3042 expands outward or contracts inward due to centrifugal force or external force, changing its radial distance from the fixed ring 301. The pulley 3044 is rotatably connected to the fixed frame 3041. On the right side, its axis is perpendicular to the swing direction of the rotating frame 3042. When the rotating frame 3042 unfolds outward, the pulley 3044 slides along the inner wall of the fixing ring 301; when the rotating frame 3042 retracts inward, the pulley 3044 retracts, the tension decreases, and as a support base, it provides an installation reference for the rotating shaft 303 and the sliding assembly 304. The fixing groove 302 on its inner wall is used to position or limit the movement range of the rotating frame 3042 and define the sliding trajectory of the pulley 3044. An external rope or component passes around the pulley 3044, and when the rotating shaft 303... When the drive pulley 3044 moves radially, the rope is tightened or loosened, thus achieving the function of tensioning. After the rotating shaft 303 stops rotating, the relative positions of the rotating frame 3042 and the fixed frame 3041 are fixed, and the pulley 3044 maintains its current position, maintaining the set tension value. By continuously rotating the rotating shaft 303, the tension can be precisely controlled to adapt to different load requirements. The rolling friction design of the pulley 3044 reduces energy loss and is suitable for scenarios that require frequent tension adjustments. All components are symmetrically distributed around the rotating shaft 303, resulting in high space utilization.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gradient stiffness prestressed anchor, comprising steel strands (1), characterized in that: An anchor mechanism (2) is fixedly connected to the left side of the outer wall of the steel strand (1). The anchor mechanism (2) is used to continuously transmit prestress. A tensioning mechanism (3) is rotatably connected to the left side of the outer wall of the anchor mechanism (2). The tensioning mechanism (3) is used to adjust the tension of the steel strand. Fixing mechanisms (4) are fixedly connected to all four sides of the outer wall of the anchor mechanism (2). Steel wires (5) are fixedly connected to all four sides of the outer wall of the steel strand (1). The anchor mechanism (2) includes a fixing cylinder (201). A fixed cylinder (201) is fixedly connected to the left side of the outer wall of the steel strand (1). A flange (202) is fixedly connected to the right side of the outer wall of the fixed cylinder (201). A buffer layer (203) is fixedly connected to the middle of the inner wall of the fixed cylinder (201). A bolt (204) is fixedly connected to the left side of the outer wall of the buffer layer (203). A connecting ring (205) is provided on one side of the outer wall of the bolt (204). A clamping assembly (206) is fixedly connected to the middle of the inner wall of the fixed cylinder (201).

2. The gradient stiffness prestressed anchorage according to claim 1, characterized in that: The clamping assembly (206) includes a clamping piece (2061), which is fixedly connected to the middle of the inner wall of the fixed cylinder (201). Dispersion grooves (2062) are provided around the outer wall of the clamping piece (2061). A diffuser plate (2063) is rotatably connected to one side of the outer wall of the clamping piece (2061). A spring (2064) is fixedly connected to the other side of the inner wall of the diffuser plate (2063). A latch (2065) is rotatably connected to the middle of the inner wall of the clamping piece (2061). A locking tongue (2066) is rotatably connected to the middle of the inner wall of the fixed cylinder (201). The locking tongue (2066) engages with the latch (2065).

3. The gradient stiffness prestressed anchorage according to claim 1, characterized in that: The tightening mechanism (3) includes a fixing ring (301), which is fixedly connected to the left side of the outer wall of the fixing cylinder (201). A fixing groove (302) is provided in the middle of the inner wall of the fixing ring (301). A rotating shaft (303) is rotatably connected to the middle of the inner wall of the fixing ring (301). Sliding components (304) are rotatably connected to the outer walls of the rotating shaft (303).

4. A gradient stiffness prestressed anchorage according to claim 3, characterized in that: The sliding assembly (304) includes a fixed frame (3041), which is fixedly connected to the outer wall of the rotating shaft (303). Rotating frames (3042) are rotatably connected to the outer wall of the fixed frame (3041) on opposite sides. A rotating shaft (3043) is rotatably connected to the middle of the inner wall of the rotating frame (3042). A pulley (3044) is rotatably connected to the right side of the outer wall of the fixed frame (3041).

5. A gradient stiffness prestressed anchorage according to claim 1, characterized in that: The fixing mechanism (4) includes a support plate (401), which is fixedly connected to the outer wall of the fixing cylinder (201). Positioning plates (402) are fixedly connected to the outer wall of the support plate (401) and a buffer assembly (403) is fixedly connected to the right side of the outer wall of the support plate (401).

6. A gradient stiffness prestressed anchorage according to claim 5, characterized in that: The buffer assembly (403) includes a gasket (4031), which is fixedly connected to the right side of the outer wall of the support plate (401), and bolts (4032) are threaded around the outer wall of the gasket (4031).

7. A gradient stiffness prestressed anchorage according to claim 3, characterized in that: A fixing plate (6) is slidably connected to one side of the inner wall of the fixing groove (302), and a protective sleeve (7) is fixedly connected to the middle of the inner wall of the fixing plate (6).

8. A gradient stiffness prestressed anchorage according to claim 1, characterized in that: A base plate (9) is fixedly connected to the left side of the outer wall of the fixed cylinder (201), and connecting plates (8) are fixedly connected to all four sides of the outer wall of the base plate (9).

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