Annular prestress tensioning and anchoring system

Abstract

The utility model provides an annular prestress tensioning and anchoring system. The annular prestress tensioning and anchoring system comprises an anchoring plate, a tensioning assembly and high-strength gridding cloth. An anchoring surface and a loading surface are formed on the two side plate surfaces of the anchoring plate respectively, an anchoring groove is formed in the anchoring surface, the anchoring surface is used for being fixedly connected to the surface of a to-be-reinforced component through solidified slurry, the high-strength gridding cloth surrounds the periphery of the to-be-reinforced component, and the tensioning assembly is connected with the loading surface and located on the side of the anchoring plate; an anchor hole is formed in the middle of the anchoring plate in the plate thickness direction in a penetrating mode. Wherein the first end of the high-strength gridding cloth is anchored in the anchor groove, the second end of the high-strength gridding cloth penetrates through the anchor hole to be connected to the output end of the tensioning assembly, and the second end and the anchor hole are bonded and fixed through a binder. According to the circumferential prestress tensioning and anchoring system, punching-free construction and repeated use can be achieved, damage to an original structure of a building is avoided, and the circumferential prestress tensioning and reinforcing construction quality can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of building reinforcement technology, specifically relating to a circumferential prestressed tensioning and anchoring system. Background Technology

[0002] As buildings age and are affected by various complex factors, reinforced concrete structures will inevitably experience problems such as decreased load-bearing capacity and strength, as well as cracking and damage. Currently, high-strength mesh fabric is typically used for circumferential tensioning reinforcement of the beams and columns of buildings exhibiting these problems.

[0003] Most existing circumferential tensioning reinforcement methods involve anchoring the two ends of a high-strength mesh fabric to a fixed-end anchor and a tensioning-end anchor, respectively. Then, a jack is used to apply circumferential tension to the high-strength mesh fabric. In actual construction, both the fixed-end anchor and the tensioning-end anchor need to be fixed to the beam-column structure through anchor seats. This requires drilling holes in the beam-column structure and inserting anchor bolts to fix the anchor seats. Since drilling holes will damage the original beam and column structure, it will have an adverse effect on the final effect of prestressed tensioning reinforcement. Utility Model Content

[0004] This utility model provides a circumferential prestressed tensioning anchoring system, which aims to avoid damage to the original structure of the structure when performing circumferential prestressed tensioning reinforcement, thereby improving the construction quality of circumferential prestressed tensioning reinforcement.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a circumferential prestressed tensioning and anchoring system is provided, including an anchoring plate, a tensioning assembly, and a high-strength mesh; the two sides of the anchoring plate respectively form an anchoring surface and a loading surface, the anchoring surface is provided with an anchor groove, and the anchoring surface is used to fix and connect to the surface of the component to be reinforced by a cured grout, the high-strength mesh surrounds the outer periphery of the component to be reinforced, the tensioning assembly is connected to the loading surface and located on the side of the anchoring plate; the anchoring plate has an anchor hole through the middle of its thickness direction; wherein, the first end of the high-strength mesh is anchored to the anchor groove, the second end passes through the anchor hole and connects to the output end of the tensioning assembly, and the second end is bonded and fixed to the anchor hole by an adhesive.

[0006] In one possible implementation, a limiting piece is bonded to at least one side of the first end, and a limiting platform is provided at the bottom of the anchor groove near the tensioning component. The limiting piece is embedded in the anchor groove and abuts against the limiting platform.

[0007] In some embodiments, the bottom of the anchor groove is provided with a plurality of raised limiting arc surfaces along its width direction, and the bottom of the anchor groove forms a continuous curved surface based on each limiting arc surface, the continuous curved surface being used to press against the limiting plate.

[0008] For example, the anchor plate includes a first plate and a second plate that are fastened together; wherein, the surface of the first plate facing away from the second plate forms an anchoring surface, and the other surface is provided with a first groove; the surface of the second plate facing away from the first plate forms a loading surface, and the other surface is provided with a second groove, and the second groove and the first groove are fastened together to form an anchor hole.

[0009] For example, the bottom of the first groove forms a first curved surface along the tensioning direction, and the bottom of the second groove forms a second curved surface along the tensioning direction. The second curved surface and the first curved surface are used to clamp the second end.

[0010] In one possible implementation, the tensioning component includes:

[0011] The thrust frame is detachably connected to the loading surface.

[0012] The tensioning support is slidably connected to the thrust frame and located on the side of the anchor plate. The tensioning support is used to anchor and fix the second end.

[0013] The jacking component, located between the thrust frame and the tensioning support, is used to output jacking force to move the tensioning support away from the thrust frame.

[0014] In some embodiments, the tensioning support includes a base plate and a cover plate that are interlocked and fixed together; the base plate is slidably connected to the thrust frame, and the second end is clamped between the base plate and the cover plate and fixed by adhesive; the jacking member is disposed between the cover plate and the thrust frame.

[0015] For example, a third groove is provided on the surface of the base plate facing the cover plate, and the bottom of the third groove forms a third curved surface along the tensioning direction; a fourth groove is provided on the surface of the cover plate facing the base plate, and the bottom of the fourth groove forms a fourth curved surface along the tensioning direction. The fourth curved surface and the third curved surface are used to cooperate to clamp the second end and are fixed by adhesive.

[0016] For example, the base plate has protruding lugs at both ends along its width, and the cover plate has slots at both ends, which are respectively engaged with the two lugs; the thrust frame has two spaced insertion holes, and a tie rod is threaded through the two lugs along the tensioning direction. The tie rod is threaded into the lug, and the two tie rods are respectively inserted into the two insertion holes to form a circumferential rotation and axial sliding fit with the insertion holes.

[0017] In some embodiments, a top block is provided in the middle of the cover plate, and a positioning groove is provided on the side of the top block facing the thrust frame. The thrust frame has a top beam, and a pushing member is provided between the top beam and the positioning groove.

[0018] The beneficial effects of the circumferential prestressed tensioning anchoring system provided by this utility model are as follows: Compared with the prior art, when performing circumferential prestressed tensioning reinforcement on a structure, this utility model only requires spraying grout onto the area of ​​the structure to be reinforced, anchoring the first end of the high-strength mesh cloth in the anchor groove, and then passing the second end around the structure and through the anchor hole to connect with the output end of the tensioning component. At the same time, the anchor hole is filled with adhesive, and then the high-strength mesh cloth can obtain pre-tension by outputting the jacking force through the tensioning component. After the grout and adhesive have cured, the tensioning component can be removed. The circumferential prestressed tensioning reinforcement of the structure can be completed without drilling holes and installing rebar in the structure, thereby avoiding damage to the original structure of the structure and improving the quality of circumferential prestressed tensioning reinforcement construction. In addition, the tensioning component can be removed and reused after the grout and adhesive have cured, thereby improving the material reuse rate and saving costs. Attached Figure Description

[0019] Figure 1 A schematic diagram of the circumferential prestressed tensioning and anchoring system provided in this embodiment of the utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the anchor plate and tensioning assembly used in an embodiment of the present utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the first plate body from the bottom view in an embodiment of the present utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of the first plate body from the top view in an embodiment of the present utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the second plate body from the bottom view in an embodiment of the present utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the cover plate from the bottom view in an embodiment of this utility model;

[0025] Figure 7 This is a three-dimensional structural diagram of the base plate from the top view in an embodiment of this utility model;

[0026] Figure 8 This is a three-dimensional structural diagram of the thrust frame used in an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the connection structure between the high-strength mesh fabric and the anchor plate in an embodiment of this utility model.

[0028] In the diagram: 10. Anchor plate; 101. Anchor surface; 102. Loading surface; 103. Anchor groove; 1031. Limiting platform; 1032. Limiting arc surface; 104. Anchor hole; 11. First plate; 111. First groove; 1111. First curved surface; 12. Second plate; 121. Second groove; 1211. Second curved surface; 20. Tensioning assembly; 21. Thrust frame; 211. Insertion hole; 212. Top Beam; 22, tension support; 221, base plate; 2211, third curved surface; 2212, ear seat; 2213, tie rod; 222, cover plate; 2221, fourth curved surface; 2222, slot; 2223, top block; 2224, positioning groove; 23, jacking component; 30, high-strength mesh cloth; 301, first end; 302, second end; 303, limiting piece; 40, component to be reinforced; 50, grout layer. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] It should be noted that when an element is referred to as "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0031] Please refer to the following: Figures 1 to 9The circumferential prestressed tensioning and anchoring system provided by this utility model will now be described. The circumferential prestressed tensioning and anchoring system includes an anchoring plate 10, a tensioning assembly 20, and a high-strength mesh 30. Anchoring surfaces 101 and loading surfaces 102 are formed on the two sides of the anchoring plate 10, respectively. Anchor grooves 103 are provided on the anchoring surfaces 101, and the anchoring surfaces 101 are used to fix and connect to the surface of the member to be reinforced 40 by a cured grout. The high-strength mesh 30 surrounds the outer periphery of the member to be reinforced 40. The tensioning assembly 20 is connected to the loading surface 102 and located on the side of the anchoring plate 10. An anchor hole 104 is provided through the middle of the anchoring plate 10 in the thickness direction. The first end 301 of the high-strength mesh 30 is anchored to the anchor groove 103, and the second end 302 passes through the anchor hole 104 and is connected to the output end of the tensioning assembly 20. The second end 302 is bonded and fixed to the anchor hole 104 by an adhesive.

[0032] When constructing using the circumferential prestressed tensioning and anchoring system provided in this embodiment, firstly, the area of ​​the structure requiring reinforcement is treated with a base surface and then a layer of slurry is sprayed on. The slurry can be polymer mortar. Then, a high-strength mesh 30 (specifically, a steel wire mesh) is wrapped around the structure, and its first end 301 is anchored in the anchor groove 103. The second end 302 passes through the anchor hole 104 and is connected to the output end of the tensioning assembly 20. Simultaneously, the anchor hole 104 is filled with adhesive (specifically, epoxy liquid adhesive, or it can be pre-coated on both sides when the second end 302 passes through the anchor hole 104). Then, the tensioning assembly... The tensioning component 20 outputs a jacking force to prestress the high-strength mesh 30. After the tension value reaches the design requirements, it remains in the current state and waits for the grout and adhesive to cure. Then, the second end 302 of the high-strength mesh 30 is cut off at the position after it passes through the anchor hole 104, and the tensioning component 20 is removed. This forms a circumferential prestressed tensioning reinforcement system on the structure, consisting of the anchor plate 10 and the high-strength mesh 30. This not only eliminates the need for drilling and rebar installation on the structure, improving construction efficiency and avoiding damage to the original structure of the structure that would affect the tensioning reinforcement effect, but also allows the tensioning component 20 to be removed and reused after construction, thus saving costs.

[0033] Compared with the prior art, the circumferential prestressed tensioning and anchoring system provided in this embodiment only requires spraying grout into the area of ​​the structure to be reinforced, anchoring the first end 301 of the high-strength mesh 30 in the anchor groove 103, and the second end 302 passing around the structure and through the anchor hole 104 to connect with the output end of the tensioning component 20. At the same time, the anchor hole 104 is filled with adhesive, and then the high-strength mesh 30 can obtain pre-tension by outputting the jacking force through the tensioning component 20. After the grout and adhesive have cured, the tensioning component 20 can be removed. The circumferential prestressed tensioning and reinforcement of the structure can be completed without drilling holes and installing rebar in the structure, thereby avoiding damage to the original structure of the structure and improving the effect of circumferential prestressed tensioning and reinforcement construction.

[0034] In some embodiments, see Figure 3 and Figure 9 At least one side of the first end 301 is bonded with a limiting piece 303. The bottom of the anchor groove 103 near the tensioning component 20 is provided with a limiting platform 1031. The limiting piece 303 is embedded in the anchor groove 103 and abuts against the limiting platform 1031. Within this anchor groove 103, a stepped groove is formed based on the limiting platform 1031. Specifically, the deeper part of the anchor groove 103 has a groove body of 2mm, and the shallower part has a groove body of 1mm. The first end 301 of the high-strength mesh fabric 30 is bonded with a limiting piece 303 (specifically, an aluminum sheet) by an adhesive. Preferably, a limiting piece 303 is bonded to both sides of the first end 301. After the limiting piece 303 is bonded, the thickness of the first end 301 is close to or equal to 2mm, which can be embedded in the deeper part of the anchor groove 103. The thickness of the high-strength mesh fabric 30 is less than 1mm, so it can pass smoothly through the shallower part of the anchor groove 103. During tension loading, the limiting piece 303 abuts against the limiting platform 1031 (specifically, the vertical platform surface of the anchor groove 103 where the depth decreases to the shallowness), thereby preventing the first end 301 from slipping out of the anchor groove 103. The structure is simple and the operation is convenient and efficient.

[0035] It should be noted that, as Figure 3 As shown, the bottom of the anchor groove 103 is provided with several raised limiting arc surfaces 1032 along its width direction. The bottom of the anchor groove 103 forms a continuous curved surface based on each limiting arc surface 1032, and the continuous curved surface is used to press against the limiting plate 303. For tension reinforcement construction with a large width, since the high-strength mesh 30 has a large width, in order to avoid the limiting plate 303 bonded to the first end 301 from undergoing arching deformation in the middle of the anchor groove 103 during tension loading (there is an error between the thickness of the first end 301 and the depth of the anchor groove 103, and the grout has not yet solidified, resulting in the limiting plate 303 gaining deformation space), a continuous curved surface is set to apply pressure to the limiting plate 303, thereby avoiding the problem of anchoring failure caused by the arching deformation of the limiting plate 303.

[0036] As one specific embodiment of the anchor plate 10 described above, please refer to Figures 2 to 5 The anchor plate 10 includes a first plate 11 and a second plate 12 that are interlocked and fixed together. The first plate 11 has an anchoring surface 101 on one side away from the second plate 12 and a first groove 111 on the other side. The second plate 12 has a loading surface 102 on one side away from the first plate 11 and a second groove 121 on the other side. The second groove 121 and the first groove 111 are interlocked to form an anchor hole 104.

[0037] The structure employs a split design where the first plate 11 and the second plate 12 interlock. During construction, the first plate 11 is first pressed into the grout layer 50. Then, the high-strength mesh 30 is wrapped around the structure and embedded into the first groove 111, connecting to the output end of the tensioning component 20. After this, the second plate 12 is then fastened onto the first plate 11. This method is simple and labor-saving, and ensures the anchoring effect of the second end 302 within the anchor hole 104. Alternatively, adhesive can be applied to the area where the high-strength mesh 30 is embedded in the first groove 111 before fastening, or adhesive can be pre-applied to the groove walls of both the first groove 111 and the second groove 121 before the high-strength mesh 30 is embedded in the first groove 111. This allows the first groove 111 and the second groove to clamp the second end 302, and after the adhesive cures, chemical anchoring of the second end 302 within the anchor hole 104 is achieved. At this point, the tensioning component 20 can be removed.

[0038] For details, please refer to Figure 4 and Figure 5 In this embodiment, the bottom of the first groove 111 forms a first curved surface 1111 along the tensioning direction, and the bottom of the second groove 121 forms a second curved surface 1211 along the tensioning direction. The second curved surface 1211 and the first curved surface 1111 are used to clamp the second end 302. Specifically, the first curved surface 1111 can be a surface that approximates a sine wave, and the second curved surface 1211 is a surface that approximates a cosine wave corresponding to the sine wave. By using the first curved surface 1111 and the second curved surface 1211 to clamp the second end 302 into a curved structure, the clamping area of ​​the second end 302 can be increased, thereby improving the clamping reliability. On the other hand, the curved structure can be used to improve the longitudinal bearing capacity, thereby improving the anchoring reliability of the second end 302 in the anchor hole 104 and improving the tensile strength.

[0039] As one specific embodiment of the aforementioned tensioning component 20, please refer to Figure 2 , Figures 6 to 9The tensioning assembly 20 includes a thrust frame 21, a tensioning support 22, and a jacking member 23. The thrust frame 21 is detachably connected to the loading surface 102. The tensioning support 22 is slidably connected to the thrust frame 21 and is located on the side of the anchor plate 10. The tensioning support 22 is used to anchor and fix the second end 302. The jacking member 23 is located between the thrust frame 21 and the tensioning support 22 and is used to output a jacking force to move the tensioning support 22 away from the thrust frame 21.

[0040] The thrust frame 21 can be fixed to the loading surface 102 by screwing. The tension support 22 and the thrust frame 21 slide together along the tensioning direction. In fact, it serves as the output end of the tensioning component 20 and is fixedly connected to the second end 302. The jacking component 23 can be a hydraulic jack. The jacking force output by the jacking component 23 can make the tension support 22 move away from the thrust frame 21, so that the high-strength mesh cloth 30 can obtain tension stress. The structure is simple and easy to assemble. It not only helps to improve construction efficiency, but also can be removed from the anchor plate 10 for reuse after construction.

[0041] Among some possible implementations, such as Figure 2 As shown, the tensioning support 22 includes a base plate 221 and a cover plate 222 that are interlocked and fixed together; the base plate 221 is slidably connected to the thrust frame 21, and the second end 302 is clamped between the base plate 221 and the cover plate 222 and fixed by adhesive; the jacking member 23 is disposed between the cover plate 222 and the thrust frame 21.

[0042] The structure employs a base plate 221 and a cover plate 222 to clamp the second end 302. Specifically, adhesive can be applied to both sides of the second end 302 and the mating surfaces of the base plate 221 and the cover plate 222. Then, the cover plate 222 is fastened onto the base plate 221. After fastening, the cover plate 222 and the base plate 221 can be fixed by screws to clamp the second end 302. This step can be performed in advance to allow the adhesive to cure before tension loading, ensuring the anchoring reliability of the second end 302. In addition, to ensure that the base plate 221 and the cover plate 222 can be reused, interface adhesive can be applied to the mating surfaces of the base plate 221 and the cover plate 222 to facilitate the smooth removal of the second end 302 during later disassembly.

[0043] To improve anchoring reliability, please refer to Figure 6 and Figure 7A third groove is provided on the surface of the base plate 221 facing the cover plate 222, and the bottom of the third groove forms a third curved surface 2211 along the tensioning direction. A fourth groove is provided on the surface of the cover plate 222 facing the base plate 221, and the bottom of the fourth groove forms a fourth curved surface 2221 along the tensioning direction. The fourth curved surface 2221 and the third curved surface 2211 are used to clamp the second end 302 and are fixed by adhesive. By clamping the second end 302 with the corresponding third curved surface 2211 and fourth curved surface 2221, the clamping area of ​​the second end 302 can be increased, and the curvature of the curved surface can be used to improve the load-bearing capacity along the tensioning direction, thereby avoiding the problem of tensioning anchorage.

[0044] It should be noted that you should refer to [link / reference]. Figure 2 , Figures 6 to 8 In this embodiment, for example, the base plate 221 has protruding ear seats 2212 at both ends along its width direction, and the cover plate 222 has slots 2222 at both ends, and the two slots 2222 are respectively engaged with the two ear seats 2212; wherein, the thrust frame 21 has two spaced insertion holes 211, and the two ear seats 2212 are respectively provided with tie rods 2213 along the tensioning direction, the tie rods 2213 are threadedly connected to the ear seats 2212, and the two tie rods 2213 are respectively inserted into the two insertion holes 211 and form a circumferential rotation and axial sliding engagement with the insertion holes 211.

[0045] The snap-fit ​​between the slot 2222 and the ear seat 2212 can prevent misalignment of the cover plate 222 and the bottom plate 221 during the tensioning loading process, which would cause the second end 302 to become unanchored. At the same time, the ear seat 2212 can form a threaded fit with the tie rod 2213, which can be rotated during construction to make the bottom plate 221 and the cover plate 222 move away from the anchor seat, thereby allowing the high-strength mesh cloth 30 to be circumferentially tensioned. This facilitates the installation of the jacking component 23 in the next step, reduces the difficulty of construction operations, and helps to improve work efficiency.

[0046] In some embodiments, such as Figure 2 As shown, a top block 2223 is provided in the middle of the cover plate 222. The top block 2223 has a positioning groove 2224 on the side facing the thrust frame 21. The thrust frame 21 has a top beam 212, and the jacking member 23 is located between the top beam 212 and the positioning groove 2224. The thrust frame 21 forms a frame structure based on the top beam 212 and the tie rod 2213. It is fixed to the loading surface 102 by bolting at both ends, and the jacking member 23 is supported by the top beam 212. The top block 2223 in the middle of the cover plate 222 can constrain the position of the jacking member 23 by using the positioning groove 2224, ensuring that the cover plate 222 is subjected to uniform force, thereby ensuring that the tensile stress on the high-strength mesh 30 is balanced in the width direction and improving the circumferential prestressing reinforcement effect.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 circumferential prestressed tensioning and anchoring system, characterized in that, The device includes an anchor plate, a tensioning assembly, and a high-strength mesh fabric. The two sides of the anchor plate form an anchoring surface and a loading surface, respectively. An anchor groove is provided on the anchoring surface, which is used to fix the device to the surface of the component to be reinforced by a cured grout. The high-strength mesh fabric surrounds the outer periphery of the component to be reinforced. The tensioning assembly is connected to the loading surface and located to the side of the anchor plate. An anchor hole is provided through the middle of the anchor plate in its thickness direction. The high-strength mesh fabric has a first end anchored to the anchor groove, and a second end passing through the anchor hole and connected to the output end of the tensioning assembly. The second end is bonded and fixed to the anchor hole with an adhesive.

2. The circumferential prestressed tensioning and anchoring system as described in claim 1, characterized in that, A limiting piece is bonded to at least one side of the first end, and a limiting platform is provided at the bottom of the anchor groove near the tensioning assembly. The limiting piece is embedded in the anchor groove and abuts against the limiting platform.

3. The circumferential prestressed tensioning and anchoring system as described in claim 2, characterized in that, The bottom of the anchor groove is provided with a plurality of raised limiting arc surfaces along its width direction. The bottom of the anchor groove forms a continuous curved surface based on each of the limiting arc surfaces. The continuous curved surface is used to press against the limiting piece.

4. The circumferential prestressed tensioning and anchoring system as described in claim 1, characterized in that, The anchor plate includes a first plate and a second plate that are interlocked and fixed together; wherein, the first plate has an anchoring surface formed on one side of its surface away from the second plate, and a first groove is provided on the other side of its surface; the second plate has a loading surface formed on one side of its surface away from the first plate, and a second groove is provided on the other side of its surface, and the second groove and the first groove are interlocked to form the anchor hole.

5. The circumferential prestressed tensioning and anchoring system as described in claim 4, characterized in that, The bottom of the first groove forms a first curved surface along the tensioning direction, and the bottom of the second groove forms a second curved surface along the tensioning direction. The second curved surface and the first curved surface are used to cooperate to clamp the second end.

6. The circumferential prestressed tensioning and anchoring system as described in claim 1, characterized in that, The tensioning component includes: The thrust frame is detachably connected to the loading surface; The tensioning support is slidably connected to the thrust frame and located on the side of the anchor plate. The tensioning support is used to anchor and fix the second end. A jacking component is disposed between the thrust frame and the tensioning support, and is used to output a jacking force to move the tensioning support away from the thrust frame.

7. The circumferential prestressed tensioning and anchoring system as described in claim 6, characterized in that, The tensioning support includes a base plate and a cover plate that are interlocked and fixed together; the base plate is slidably connected to the thrust frame, and the second end is clamped between the base plate and the cover plate and fixed by the adhesive; the jacking member is disposed between the cover plate and the thrust frame.

8. The circumferential prestressed tensioning and anchoring system as described in claim 7, characterized in that, The bottom plate has a third groove on its surface facing the cover plate, and the bottom of the third groove forms a third curved surface along the tensioning direction; the cover plate has a fourth groove on its surface facing the bottom plate, and the bottom of the fourth groove forms a fourth curved surface along the tensioning direction. The fourth curved surface and the third curved surface are used to clamp the second end and are fixed by adhesive.

9. The circumferential prestressed tensioning and anchoring system as described in claim 7, characterized in that, The base plate has protruding lugs at both ends along its width direction, and the cover plate has slots at both ends, with the two slots engaging with the two lugs respectively. The thrust frame has two spaced-apart insertion holes, and a tie rod is threaded through each of the two lugs along the tension direction. The tie rod is threaded into the lug, and the two tie rods are inserted into the two insertion holes respectively, forming a circumferential rotation and axial sliding engagement with the insertion holes.

10. The circumferential prestressed tensioning anchorage system as described in claim 7, characterized in that, The cover plate has a top block in the middle, and the top block has a positioning groove on the side facing the thrust frame. The thrust frame has a top beam, and the pushing member is located between the top beam and the positioning groove.

Images