High-stability prestressed anchoring system and tensioning construction equipment thereof

Abstract

The invention discloses a high-stability prestressed anchoring system and tensioning construction equipment thereof. The high-stability prestressed anchoring system comprises concrete and an anchoring mechanism embedded into the concrete. Tensioning construction equipment adopts cross-core type jacking and pulling equipment, mainly comprises a tensioning cylinder, a piston, a cross-core sleeve, a tool anchor and the like, and is based on hydraulic transmission and mechanical anchoring. The anti-loose check ring fixed to the outer side of the wedge-shaped self-locking clamping piece further enhances the connecting strength with the anchor ring, stable transmission of prestress is ensured, the metal casting bearing plate and the plastic horn mouth form a split type bearing plate, the metal casting bearing plate can better bear pressure transmitted into concrete by the anchor ring, and the anti-loose check ring is not prone to falling off. The plastic horn mouth is pre-buried in the concrete, so that the bending angle of the steel strand can meet the requirement, the length of the transition section of the steel strand is increased, the problem of prestress loss caused by insufficient friction force of the contact surface of the clamping piece and the steel strand in a traditional anchoring system is effectively solved, and the long-term stability and reliability of the anchoring system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of prestressed anchorage in civil engineering, and particularly to an anchor system and a supporting tensioning device that reduce prestress loss and improve anchorage stability through mechanical structure optimization, and are applicable to projects such as bridges, tunnels, and slope support. Background Art

[0002] An anchorage system is a system used for structural reinforcement and stability. By connecting the structure to the foundation or rock mass through anchor bolts, its bearing capacity and stability are enhanced. The tensioning construction equipment is a special equipment used to apply prestress to the anchor bolts during the anchoring process. By stretching the anchor bolts with the tensioning equipment, prestress is generated, thereby improving the anchoring effect and the safety of the structure. This equipment usually includes components such as jacks, oil pumps, and sensors, and can precisely control the tension force to ensure the effectiveness and reliability of the anchorage system.

[0003] Several defects have emerged in the application of traditional anchorage systems, mainly including: insufficient friction between the contact surfaces of the wedge grips and the steel strands, which can easily cause the wedge grips to slip after long-term use, thereby leading to prestress loss; uneven stress distribution in the contact area between the anchor ring and the wedge grips, resulting in stress concentration, which is likely to cause local deformation or cracking and affect the structural stability; during the construction process, the poor centering of the manual installation of the wedge grips requires repeated adjustment, resulting in low construction efficiency and increased project time and costs; in addition, the traditional anchorage system lacks an effective structural compensation mechanism and is difficult to cope with the prestress attenuation caused by the relaxation of the steel strands and the settlement of the foundation, thereby weakening the long-term reliability of the anchoring effect. These defects limit the application performance and safety of traditional anchorage systems in complex projects. Summary of the Invention

[0004] An object of the present invention is to propose a high-stability prestressed anchorage system and its tensioning construction equipment, which solve the several defects exposed in the application of the traditional anchorage system in the above background, mainly including: insufficient friction between the contact surfaces of the wedge grips and the steel strands, which can easily cause the wedge grips to slip after long-term use, thereby leading to prestress loss; uneven stress distribution in the contact area between the anchor ring and the wedge grips, resulting in stress concentration, which is likely to cause local deformation or cracking and affect the structural stability; during the construction process, the poor centering of the manual installation of the wedge grips requires repeated adjustment, resulting in low construction efficiency and increased project time and costs; in addition, the traditional anchorage system lacks an effective structural compensation mechanism and is difficult to cope with the prestress attenuation caused by the relaxation of the steel strands and the settlement of the foundation, thereby weakening the long-term reliability of the anchoring effect. These defects limit the application performance and safety of traditional anchorage systems in complex projects.

[0005] A high-stability prestressed anchorage system according to an embodiment of the present invention includes:

[0006] Concrete and an anchoring mechanism embedded in the concrete, wherein the anchoring mechanism includes a split bearing plate composed of a metal casting bearing plate and a plastic bell mouth. A corrugated pipe is provided at the front end of the metal casting bearing plate, and an anchor ring is snap-fitted at the tail end of the metal casting bearing plate. Wedge-shaped self-locking clamping pieces are evenly arranged in a circular shape inside the anchor ring. The metal casting bearing plate and the plastic bell mouth are quickly locked and disassembled through a quick-release mechanism;

[0007] A tensioning construction device, comprising:

[0008] A tension force construction equipment assembly, including a cylinder body. At the top of the cylinder body, an oil pipe assembly and a grip are respectively fixed. Return oil ports and forward oil ports are respectively opened inside the oil pipe assembly. An inner cylinder sleeve is fixedly arranged inside the cylinder body. A positioning fixture assembly for centering and pre-tightening the steel strand is installed between the cylinder body and the inner cylinder sleeve.

[0009] Preferably, staggered tooth patterns are arranged on the inner sides of the wedge-shaped self-locking clamping pieces, and the tooth pattern inclination angle is 40°, increasing the biting area with the steel strand. A lock washer for improving the connection strength with the anchor ring is fixed on the outer side of the wedge-shaped self-locking clamping piece.

[0010] Preferably, the steel strands respectively penetrate through the inside of the split bearing plate, the anchor ring and the wedge-shaped self-locking clamping pieces.

[0011] Preferably, the return oil port is communicated with the front ends of the grip and the inner cylinder sleeve, and the forward oil port is communicated with the tail end of the inner cylinder sleeve.

[0012] Preferably, the positioning fixture assembly includes a piston movably arranged between the cylinder body and the inner cylinder sleeve. A sealing ring seat is fixedly arranged at the tail end of the piston. Spring seats and top anchor seats are respectively fixedly arranged at the front ends of the inner cylinder sleeve and the piston. A tool clamping piece is connected to the front end of the spring seat through a first spring. An anchor cup is installed on the outer side of the tool clamping piece. A clamping piece top head is arranged at the front end of the tool clamping piece. A detachable front top head is fixedly arranged at the front end of the top anchor seat.

[0013] Preferably, a first end cover and a second end cover are respectively fixedly arranged by screwing at the tail ends between the cylinder body and the inner cylinder sleeve.

[0014] Preferably, the anchor cup is movably arranged in contact with the inner surface of the top anchor seat.

[0015] Preferably, the quick-release mechanism includes a connecting rod passing through between the metal casting bearing plate and the plastic bell mouth. Spiral grooves and external threads are respectively arranged at the upper end of the outer side of the connecting rod. A push rod is movably arranged at the top of the connecting rod. A button, a movable rod, a limiting ring and stepped teeth are respectively and fixedly arranged on the outer side of the push rod from top to bottom. A second spring is fixedly arranged between the top of the limiting ring and the connecting rod. Hidden grooves are circularly and evenly arranged at the lower end of the outer side of the connecting rod. A support arm is rotatably arranged at the lower end inside the hidden groove through a rotating shaft. A [missing part] is movably arranged inside the connecting rod. The support arm is meshed and driven with the stepped teeth on the outer side of the push rod through external teeth fixed on the outer side. Keys are circularly and evenly fixed on the outer side of the button. A guide cylinder is movably arranged on the outer side of the button through the keys. A nut sleeved on the outer side of the connecting rod is fixedly arranged at the bottom of the guide cylinder. The nut is threadedly arranged with the connecting rod through the external thread.

[0016] Preferably, a plurality of the quick-release mechanisms are circularly and evenly arranged. The movable rod is movably arranged inside the spiral groove. The second spring is located on the outer side of the push rod. An elastic gasket is fixedly arranged at the bottom of the nut.

[0017] The beneficial effects of the present invention are as follows:

[0018] By arranging the anchoring mechanism, the present invention effectively avoids the problems of wedge slip and prestress loss in the traditional anchoring system. Interleaved tooth patterns are arranged on the inner side of the wedge-shaped self-locking wedge in the anchoring mechanism, and the tooth pattern inclination angle is 40°, increasing the biting area with the steel strand, thereby increasing the friction force and reducing the possibility of slip. At the same time, the anti-loosening retaining ring fixed on the outer side of the wedge-shaped self-locking wedge further enhances the connection strength with the anchor ring, ensuring the stable transmission of prestress. The split bearing plate composed of the metal casting bearing plate and the plastic bell mouth. The metal casting bearing plate can better bear the pressure transmitted from the anchor ring to the concrete. The plastic bell mouth embedded in the concrete can ensure that the bending angle of the steel strand meets the requirements and increases the length of the steel strand transition section. Therefore, the problem of prestress loss caused by insufficient friction force between the wedge and the steel strand contact surface in the traditional anchoring system is effectively solved, and the long-term stability and reliability of the anchoring system are improved;

[0019] Through the provided tensioning construction equipment components, the present invention effectively avoids the problems of stress concentration and local deformation in the traditional anchoring system. During use, after the steel strand penetrates into the tool wedge, the oil pipe assembly is started to inject oil into the process oil port to push the piston forward, driving the top anchor seat and the front top head to tightly press against the anchor cup. At this time, the tool wedge automatically clamps the steel strand under the pre-tightening force of the first spring, and the concentric design of the spring seat and the top anchor seat ensures that the axis of the wedge coincides with the steel strand. During the tensioning process, if the steel strand deflects, the seal ring seat between the inner cylinder sleeve and the piston adaptively adjusts the angle of the wedge through hydraulic pressure. At the same time, the wedge head corrects the deviation in real time under the guidance of the top anchor seat. After the tensioning is completed, the return oil port is switched to relieve pressure, and the second spring pushes the piston to reset, and the tool wedge automatically loosens, thereby optimizing the stress distribution, reducing the risk of local deformation or cracking, and thus improving the construction quality and structural stability;

[0020] Through the provided quick-release mechanism, the present invention effectively avoids the problem of low construction efficiency in the traditional anchoring system. When the split bearing plate is quickly installed, the metal casting bearing plate is connected to the plastic trumpet mouth, and then the push rod is pushed down by pressing the button. The support arm is driven to be received into the internal part of the hidden groove around the rotating shaft through the engagement of the stepped teeth and the external teeth. At this time, the quick-release component can be inserted into the connection part between the metal casting bearing plate and the plastic trumpet mouth. After releasing the button, the push rod makes the movable rod fixed on the outside of the push rod slide inside the spiral groove under the action of the spring, thereby making the push rod produce a rotating effect. When the push rod rises, the support arm will expand outward under the engagement connection of the stepped teeth and the external teeth. At the same time, the guide cylinder connected to the outside of the button through the key will rotate automatically in the direction of the metal casting bearing plate under the threaded connection of the external thread and the guide cylinder to rotate to the effect of fixing the split bearing plate. Therefore, this component can be installed by pressing and quickly locked by releasing the button, thereby greatly simplifying the installation and adjustment process of the wedge, reducing the construction time, improving the construction efficiency, and at the same time reducing the labor cost and project time, and enhancing the economy and convenience of the overall construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0023] Figure 2 It is a construction schematic diagram of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0024] Figure 3Schematic diagram of the split bearing plate structure of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0025] Figure 4 Schematic diagram of the wedge-shaped self-locking wedge structure of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0026] Figure 5 Schematic diagram of the enlarged structure at position A of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0027] Figure 6 Schematic sectional view of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0028] Figure 7 Schematic diagram of the quick-release mechanism structure of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0029] Figure 8 Schematic diagram of the connecting rod structure of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0030] Figure 9 Schematic diagram of the spiral groove structure of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0031] Figure 10 Schematic diagram of the stepped tooth platform structure of a high-stability prestressed anchoring system and its tensioning construction equipment proposed by the present invention;

[0032] In the figure: 1, concrete; 2, anchoring mechanism; 201, metal casting bearing plate; 202, corrugated pipe; 203, spiral reinforcement; 204, plastic bell mouth; 205, anchor ring; 206, wedge-shaped self-locking wedge; 2061, anti-loosening retaining ring; 2062, staggered tooth pattern; 3, tensioning construction equipment assembly; 301, cylinder block; 302, oil pipe combination; 303, grip; 304, return oil port; 305, forward oil port; 306, inner cylinder sleeve; 307, piston; 308, seal ring seat; 309, first end cover; 310, second end cover; 311, spring seat; 312, jacking anchor seat; 313, anchor cup; 314, first spring; 315, wedge top; 316, front top; 317, tool wedge; 4, steel strand; 5, quick-release mechanism; 501, connecting rod; 502, hidden groove; 503, spiral groove; 504, external thread; 505, push rod; 506, limit ring; 507, stepped tooth; 508, second spring; 509, movable rod; 510, support arm; 511, external tooth; 512, rotating shaft; 513, button; 514, key; 515, guide cylinder; 516, nut; 517, elastic gasket. Detailed implementation mode

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0034] Reference Figure 1-10 , a high-stability prestressed anchoring system, comprising:

[0035] Concrete 1 and an anchoring mechanism 2 embedded in the concrete 1. The anchoring mechanism 2 includes a split bearing plate composed of a metal casting bearing plate 201 and a plastic bell mouth 204. A corrugated pipe 202 is provided at the front end of the metal casting bearing plate 201, and an anchor ring 205 is snap-fitted at the tail end of the metal casting bearing plate 201. Wedge-shaped self-locking clamping pieces 206 are evenly arranged in a circular shape inside the anchor ring 205. The split bearing plate composed of the metal casting bearing plate and the plastic bell mouth. The metal casting bearing plate can better bear the pressure transmitted from the anchor ring to the concrete. Embedding the plastic bell mouth in the concrete can ensure that the bending angle of the steel strand meets the requirements and increase the length of the transition section of the steel strand. The metal casting bearing plate 201 and the plastic bell mouth 204 are quickly locked and disassembled through a quick-release mechanism 5. The quick-release mechanism 5 includes a connecting rod 501 penetrating between the metal casting bearing plate 201 and the plastic bell mouth 204. Spiral grooves 503 and external threads 504 are respectively provided at the upper ends on the outer side of the connecting rod 501. A push rod 505 is movably arranged at the top of the connecting rod 501. Buttons 513, movable rods 509, limit rings 506 and step teeth 507 are fixedly arranged on the outer side of the push rod 505 from top to bottom. A second spring 508 is fixedly arranged between the top of the limit ring 506 and the connecting rod 501. Hidden grooves 502 are evenly opened in a circular shape at the lower ends on the outer side of the connecting rod 501. A support arm 510 is rotatably arranged at the lower end inside the hidden groove 502 through a rotating shaft 512. A support arm 510 is movably arranged inside the connecting rod 501. The support arm 510 is meshed and driven with the step teeth 507 on the outer side of the push rod 505 through external teeth 511 fixed on the outer side. Keys 514 are fixedly arranged on the outer side of the button 513 in a circular shape. A guide cylinder 515 is movably arranged on the outer side of the button 513 through the keys 514. A nut 516 sleeved on the outer side of the connecting rod 501 is fixedly arranged at the bottom of the guide cylinder 515. The nut 516 is threadedly arranged with the connecting rod 501 through the external thread 504. When the split bearing plate is quickly installed, the metal casting bearing plate and the plastic bell mouth are connected. Then, by pressing the button to push the push rod downward, the support arm is driven to be received into the hidden groove around the rotating shaft through the meshing of the step teeth and the external teeth. At this time, the quick-release component can be inserted into the connection between the metal casting bearing plate and the plastic bell mouth. After releasing the button, the push rod makes the movable rod fixed on the outer side of the push rod slide inside the spiral groove under the action of the spring, thereby causing the push rod to rotate. When the push rod rises, the support arm will expand outward under the meshing connection of the step teeth and the external teeth. At the same time, the guide cylinder connected to the outer side of the button through the key will rotate automatically in the direction of the metal casting bearing plate under the threaded connection of the external thread and the guide cylinder to rotate until the split bearing plate is fixed.

[0036] A tensioning construction device, comprising:

[0037] Tensile force construction equipment assembly, including a cylinder block 301, with an oil pipe assembly 302 and a grip 303 fixedly arranged at the top of the cylinder block 301 respectively. Return oil ports 304 and advance oil ports 305 are respectively arranged inside the oil pipe assembly 302. An inner cylinder sleeve 306 is fixedly arranged inside the cylinder block 301. A positioning fixture assembly for centering and pre-tightening the steel strand 4 is installed between the cylinder block 301 and the inner cylinder sleeve 306. The positioning fixture assembly includes a piston 307 movably arranged between the cylinder block 301 and the inner cylinder sleeve 306. A sealing ring seat 308 is fixedly arranged at the tail end of the piston 307. Spring seats 311 and top anchor seats 312 are respectively fixedly arranged at the front ends of the inner cylinder sleeve 306 and the piston 307. A tool clamping piece 317 is connected to the front end of the spring seat 311 through a first spring 314. An anchor cup 313 is installed outside the tool clamping piece 317. A clamping piece top head 315 is arranged at the front end of the tool clamping piece 317. A detachable front top head 316 is fixedly arranged at the front end of the top anchor seat 312. Starting the oil pipe assembly to inject oil into the advance oil port to push the piston forward, driving the top anchor seat and the front top head to tightly press the anchor cup. At this time, the tool clamping piece automatically clamps the steel strand under the pre-tightening force of the first spring. The concentric design of the spring seat and the top anchor seat ensures that the axis of the clamping piece coincides with the steel strand. During the tensioning process, if the steel strand deviates, the sealing ring seat between the inner cylinder sleeve and the piston adaptively adjusts the angle of the clamping piece through hydraulic pressure. At the same time, the clamping piece top head corrects the deviation in real time under the guidance of the top anchor seat. After the tensioning is completed, switch to the return oil port to relieve pressure, and the second spring pushes the piston to reset, and the tool clamping piece automatically loosens.

[0038] Embodiment 1: Interleaved tooth patterns 2062 are arranged on the inner sides of the wedge-shaped self-locking clamping pieces 206, and the inclination angle of the tooth patterns is 40°, increasing the biting area with the steel strand, thereby increasing the friction force and reducing the possibility of slippage. The biting area with the steel strand 4 is increased. A lock washer 2061 for improving the connection strength with the anchor ring 205 is fixed on the outside of the wedge-shaped self-locking clamping piece 206. The lock washer fixed on the outside of the wedge-shaped self-locking clamping piece further enhances the connection strength with the anchor ring, ensuring the stable transmission of the prestress. The steel strand 4 respectively penetrates through the internal parts of the split bearing plate, the anchor ring 205 and the wedge-shaped self-locking clamping piece 206.

[0039] Embodiment 2: The return oil port 304 is communicated with the front ends of the grip 303 and the inner cylinder sleeve 306, and the advance oil port 305 is communicated with the tail end of the inner cylinder sleeve 306. First end covers 309 and second end covers 310 are respectively fixedly arranged at the tail ends between the cylinder block 301 and the inner cylinder sleeve 306 by threads. The anchor cup 313 is movably arranged in contact with the inner surface of the top anchor seat 312. During the construction process, the anchor cup 313 is arranged in contact with the inner surface of the top anchor seat 312 to achieve movable arrangement, which is convenient for adjustment and positioning. By controlling the flow of the oil fluid through the oil pipe assembly 302, the tensioning and return operations are realized, and the prestress is accurately applied, ensuring the uniform distribution and long-term stability of the prestress, and being applicable to various complex engineering environments.

[0040] Example 3: A number of quick-release mechanisms 5 are arranged in a circular shape. The movable rod 509 is movably arranged inside the spiral groove 503, enabling flexible sliding and positioning. The second spring 508 is located outside the push rod 505, providing stable elastic support. An elastic gasket 517 is fixedly arranged at the bottom of the nut 516, effectively buffering vibration and impact.

[0041] Example 4:

[0042] 1. Anchor installation:

[0043] Pass the steel strand through the anchor ring, and use a centering positioning fixture to ensure that the axis deviation of the steel strand is ≤1°.

[0044] Use a wedge pre-tightener to impact the wedges until the tooth pattern is embedded in the surface of the steel strand, and visually check that the bite depth is ≥2 mm.

[0045] 2. Assembly of the bearing plate:

[0046] Place 3 sector plates into a special clamp, and tighten the bolts so that the joint gap is ≤0.3 mm.

[0047] 3. Tensioning construction:

[0048] Start the hydraulic jack to tension in stages to the design value (such as 0→20%→50%→100%σcon), and keep the pressure stable for 2 minutes at each stage.

[0049] 4. Stress compensation:

[0050] After the tensioning is completed, connect the manual hydraulic pump to inject oil into the compensation chamber, and stop when the pressure gauge shows 15 MPa.

[0051] Working principle: First, during the installation stage of the anchor, the steel strand passes through the anchor ring. The centering and positioning fixture is used to ensure that the axis deviation is controlled within 1, guaranteeing the installation accuracy. Subsequently, the wedge pre-tightener impacts the wedges until the tooth patterns are embedded in the surface of the steel strand, and visual inspection shows that the biting depth reaches 2 mm to ensure a firm connection. When assembling the bearing plate, three sector plates are placed into the special clamp, and the bolts are tightened to control the joint gap within 0.3 mm, forming a stable split-type bearing plate. The metal casting bearing plate and the plastic trumpet are connected by the quick-release mechanism 5 to achieve quick locking and disassembly. The quick-release mechanism includes components such as the connecting rod 501 and the push rod 505. Pressing the button 513 to push the push rod downward can complete the installation and disassembly. During the tensioning construction stage, the hydraulic jack is started, and tensioning is carried out in stages to the design value, with a pressure stabilization of 2 minutes for each stage. The flow of the hydraulic oil is controlled through the oil pipe assembly 302 to achieve the tensioning and retracting operations and accurately apply the prestress. The tensioning force construction equipment components include the cylinder block 301, the inner cylinder sleeve 306, etc. The piston 307 drives the top anchor seat 312 and the front top head 316 to tighten the anchor cup 313, realizing the automatic clamping and tensioning of the steel strand. Finally, stress compensation is carried out. After the tensioning is completed, the manual hydraulic pump is connected to inject oil into the compensation chamber until the pressure gauge shows 15 MPa and then stop, ensuring the uniform distribution and long-term stability of the prestress. The wedge self-locking wedges 206 inside the anchor ring 205 have staggered tooth patterns on the inner side to increase the biting area, improve the friction force, and reduce slip; the outer anti-loosening retaining ring enhances the connection strength with the anchor ring. In summary, through precise installation, stable assembly, staged tensioning, and stress compensation, this system achieves high-stability prestressed anchoring and is applicable to various complex engineering environments.

[0052] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A high-stability prestressed anchoring system, characterized in that, Comprising: Concrete (1) and an anchoring mechanism (2) embedded inside the concrete (1). The anchoring mechanism (2) includes a split bearing plate composed of a metal casting bearing plate (201) and a plastic bell mouth (204). A corrugated pipe (202) is provided at the front end of the metal casting bearing plate (201). An anchor ring (205) is snap-fitted at the tail end of the metal casting bearing plate (201). Wedge self-locking clamping pieces (206) are circularly and evenly arranged inside the anchor ring (205). The metal casting bearing plate (201) and the plastic bell mouth (204) are quickly locked and disassembled through a quick-release mechanism (5).

2. A tensioning construction device, characterized in that, Comprising: A tension construction equipment assembly, including a cylinder block (301). An oil pipe assembly (302) and a handle (303) are respectively fixed at the top of the cylinder block (301). A return oil port (304) and a forward oil port (305) are respectively arranged inside the oil pipe assembly (302). An inner cylinder sleeve (306) is fixedly arranged inside the cylinder block (301). A positioning fixture assembly for centering and pre-tightening the steel strand (4) is installed between the cylinder block (301) and the inner cylinder sleeve (306).

3. A highly stable prestressed anchoring system according to claim 1, characterized in that, Interleaved tooth patterns (2062) are arranged on the inner sides of the wedge self-locking clamping pieces (206), and the tooth pattern inclination angle is 40°, increasing the biting area with the steel strand (4). A lock washer (2061) for improving the connection strength with the anchor ring (205) is fixed on the outer side of the wedge self-locking clamping piece (206).

4. A highly stable prestressed anchoring system according to claim 3, characterized in that The steel strands (4) respectively penetrate through the inside of the split bearing plate, the anchor ring (205), and the wedge self-locking clamping pieces (206).

5. A tensioning construction device according to claim 2, characterized in that The return oil port (304) is communicated with the front ends of the handle (303) and the inner cylinder sleeve (306), and the forward oil port (305) is communicated with the tail end of the inner cylinder sleeve (306).

6. The tensioning construction equipment according to claim 2, characterized in that, The positioning fixture assembly includes a piston (307) movably arranged between the cylinder block (301) and the inner cylinder sleeve (306). A sealing ring seat (308) is fixedly arranged at the tail end of the piston (307). A spring seat (311) and a top anchor seat (312) are respectively fixedly arranged at the front ends of the inner cylinder sleeve (306) and the piston (307). A tool clamping piece (317) is connected to the front end of the spring seat (311) through a first spring (314). An anchor cup (313) is installed on the outer side of the tool clamping piece (317). A clamping piece top head (315) is provided at the front end of the tool clamping piece (317). A detachable front top head (316) is fixedly arranged at the front end of the top anchor seat (312).

7. A tensioning construction device according to claim 2, wherein, A first end cover (309) and a second end cover (310) are respectively fixed by threads at the tail ends between the cylinder block (301) and the inner cylinder sleeve (306).

8. A tensioning construction device according to claim 6, characterized in that, The anchor cup (313) is movably arranged in contact with the inner surface of the top anchor seat (312).

9. A highly stable prestressed anchoring system according to claim 1, characterized in that, The quick-release mechanism (5) includes a connecting rod (501) passing through between the metal casting bearing plate (201) and the plastic bell mouth (204). At the upper end of the outer side of the connecting rod (501), a spiral groove (503) and an external thread (504) are respectively arranged. A push rod (505) is movably arranged at the top of the connecting rod (501). A button (513), a movable rod (509), a limit ring (506) and a stepped tooth (507) are fixedly arranged on the outer side of the push rod (505) from top to bottom. A second spring (508) is fixedly arranged between the top of the limit ring (506) and the connecting rod (501). At the lower end of the outer side of the connecting rod (501), invisible grooves (502) are circularly arranged. A support arm (510) is rotatably arranged at the lower end inside the invisible groove (502) through a rotating shaft (512). Inside the connecting rod (501) is movably arranged. The support arm (510) is meshed and driven with the stepped tooth (507) on the outer side of the push rod (505) through external teeth (511) fixed on the outer side. On the outer side of the button (513), keyways (514) are circularly fixedly arranged. A guide cylinder (515) is movably arranged on the outer side of the button (513) through the keyways (514). A nut (516) sleeved on the outer side of the connecting rod (501) is fixedly arranged at the bottom of the guide cylinder (515). The nut (516) is threadedly arranged with the connecting rod (501) through the external thread (504).

10. A highly stable prestressed anchoring system according to claim 9, characterized in that, A number of the quick-release mechanisms (5) are circularly arranged. The movable rod (509) is movably arranged inside the spiral groove (503). The second spring (508) is located on the outer side of the push rod (505). An elastic gasket (517) is fixedly arranged at the bottom of the nut (516).

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