Liftable fiber cloth prestress tensioning device of arc-shaped structure
By designing a fiber cloth prestressing tensioning device with a liftable arc structure, the problem of limited construction space for composite fiber materials in arc structures is solved, achieving uniform distribution of prestress and ease of construction, and is suitable for tunnel reinforcement of arc structures.
Patent Information
- Application Number
- CN202511947904.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-01-23
AI Technical Summary
Existing composite fiber prestressing tensioning devices are difficult to apply effectively in curved structures such as shield subway tunnels, especially when construction space is limited, resulting in problems such as large space occupation and poor applicability.
Design a liftable arc-shaped fiber cloth prestressing tensioning device, including an arc-shaped bearing base plate, a prestressing application mechanism, a clamping mechanism and a lifting mechanism. The arc-shaped top surface is attached to the tunnel arch, and the fiber cloth is efficiently tensioned by the drive unit and the clamping mechanism. The lifting mechanism lifts the entire device to ensure that the fiber cloth is firmly attached to the tunnel arch.
It achieves uniform distribution and precise application of prestress on curved structures, reduces the need for confined spaces at high altitudes, and improves the convenience and applicability of construction.
Smart Images
Figure CN121382255A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of tunnel structure reinforcement technology, and in particular to a fiber cloth prestressing tensioning device with a liftable arc structure. Background Technology
[0002] With the widespread application of composite fiber materials in the construction field, technologies for reinforcing and repairing building structures by applying prestress to structures using composite fiber materials have also developed significantly. These technologies, due to their high strength, lightweight, corrosion resistance, and durability, have become one of the main choices for structural repair and reinforcement. However, when faced with building structures in complex environments and with complex shapes, existing composite fiber material repair technologies have significant limitations in practical application.
[0003] Firstly, existing prestressed tensioning devices for composite fiber materials, such as prestressed composite fiberboard prestressed tensioning devices, are mainly designed for regular planar or simple-shaped structures, such as the bottom of bridges or the bottom of beams in building structures. These structures have ample space for prestressing tensioning operations, thus enabling them to perform prestressed reinforcement work effectively. However, for curved structures such as shield-tunnel subway tunnels, there is no sufficient planar surface, and the construction space is relatively small. Therefore, traditional composite fiberboard prestressed tensioning devices are difficult to use in these types of structures.
[0004] Meanwhile, some existing tensioning devices for curved structures have the problem of occupying a large space, making them less suitable for space-constrained structures such as shield-tunnel subway tunnels. Summary of the Invention
[0005] The purpose of this invention is to provide a fiber cloth prestressing tensioning device with a liftable arc structure to solve the problems existing in the prior art, while taking into account small space occupation, convenient construction, and strong adaptability.
[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a liftable arc-shaped fiber cloth prestressing tensioning device, comprising: an arc-shaped support base plate having an arc-shaped top surface, a portion of which can fit against a tunnel arch; a prestressing application mechanism fixedly disposed at one end below the arc-shaped support base plate, the prestressing application mechanism having a built-in drive unit; a clamping mechanism including a fixed clamp and a movable clamp, the fixed clamp being fixedly disposed at the other end below the arc-shaped support base plate and arranged opposite to the prestressing application mechanism, a guide component being fixedly disposed between the fixed clamp and the prestressing application mechanism, the movable clamp being slidably disposed on the guide component, the output end of the drive unit being able to push the movable clamp to move towards the side closer to the fixed clamp, the fixed clamp and the movable clamp being used to clamp corresponding ends of the fiber cloth respectively; and a lifting mechanism for driving the arc-shaped support base plate, the prestressing application mechanism and the clamping mechanism to rise and fall vertically, so that the fiber cloth on the arc-shaped top surface fits against the tunnel arch.
[0007] Preferably, the arc-shaped support substrate includes an arc-shaped plate and a base plate; the base plate is located below the arc-shaped plate, and the two ends of the arc-shaped plate are respectively connected to the corresponding ends of the base plate to form an annular structure; the two ends of the arc-shaped plate are respectively connected to the ends of the base plate through arc-shaped connecting surfaces; the fixing clamp and the prestressing mechanism are respectively fixedly disposed below the corresponding ends of the base plate.
[0008] Preferably, there is a reserved gap between the prestressing mechanism and the base plate; after the fiber cloth passes around the arc-shaped top surface, the end away from the fixing clamp passes through the reserved gap and is fixedly clamped by the movable clamp.
[0009] Preferably, the prestressing application mechanism is a fixed block, and the driving unit includes two jacks; the fixed block is fixedly disposed below one end of the base plate, and a U-shaped groove is provided above the fixed block, the opening of the U-shaped groove facing the base plate, and together with a portion of the lower surface of the base plate, forming the reserved gap; the guide assembly is fixedly disposed between the fixed block and the fixed clamp, and two receiving grooves are provided on the side wall of the fixed block near the fixed clamp, the openings of the receiving grooves facing the fixed clamp, the receiving grooves corresponding one-to-one with the jacks, and the jacks are fixedly disposed in the receiving grooves; the output end of the jack is used to push the movable clamp to move.
[0010] Preferably, the fixed clamp includes a fixed upper clamping plate and a fixed lower clamping plate; the movable clamp includes a movable upper clamping plate and a movable lower clamping plate; the clamping surfaces between the fixed upper clamping plate and the fixed lower clamping plate, and the clamping surfaces between the movable upper clamping plate and the movable lower clamping plate are all multi-arc clamping surfaces that fit together vertically and are continuous arc surfaces.
[0011] Preferably, the multi-arc clamping surface is a frosted surface.
[0012] Preferably, the guide assembly includes two parallel cylindrical rods, the ends of which near the fixing block are fixedly connected to the fixing block.
[0013] Preferably, the base plate has multiple first connecting holes, the upper fixing plate has multiple second connecting holes, and the lower fixing plate has multiple third connecting holes; the first connecting holes, the second connecting holes, and the third connecting holes are all one-to-one and are fixed together by a connecting bolt.
[0014] Preferably, the arc-shaped connecting surface is tangent to the arc-shaped top surface and the bottom surface of the base plate.
[0015] Preferably, the lifting mechanism is a scissor lift platform, and the driver of the lifting mechanism is an electro-hydraulic drive.
[0016] The present invention achieves the following technical effects compared to the prior art: The fiber cloth prestressing tensioning device with a liftable arc-shaped structure provided by this invention solves the problem that traditional tensioning devices designed for flat surfaces are difficult to adapt to arc-shaped structures by specially designing the top of the arc-shaped bearing base plate as an arc-shaped top surface (specifically a portion of the top surface) that can fit into the tunnel arch. This provides a foundation for the uniform distribution of prestress on the arc surface. Secondly, the cooperative working mode of the clamping mechanism (including fixed clamps and movable clamps) and the prestressing application mechanism allows the fiber cloth tensioning operation to be completed in a compact space below the arc-shaped bearing base plate. The drive unit pushes the movable clamps along the guide assembly. The system enables efficient and linear tensioning of the fiber cloth, ensuring precise application of prestress. The lifting mechanism allows the entire tensioning device (including the arc-shaped bearing base plate, prestressing application mechanism, and clamping mechanism) to be lifted as a whole after tensioning, ensuring that the tensioned and adhesive-coated fiber cloth is firmly bonded to the tunnel arch. This construction method, which involves tensioning at ground level or at a convenient height and then lifting the entire device, greatly reduces the need for high-altitude and confined working space at the tunnel arch, thus effectively overcoming the fatal flaws of existing technologies, such as large space occupation and poor applicability in confined spaces. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the overall structure of the liftable arc-shaped fiber cloth prestressing tensioning device provided by the present invention; Figure 2 The front view of the fiber cloth prestressing tensioning device with a liftable arc-shaped structure provided by the present invention; Figure 3 This is a side view of the fiber cloth prestressing tensioning device with a liftable arc-shaped structure provided by the present invention; Figure 4 A top view of the fiber cloth prestressing tensioning device with a liftable arc-shaped structure provided by the present invention; Figure 5 This is a front view of the remaining part of the fiber cloth prestressing tensioning device with a liftable arc structure provided by the present invention after removing the lifting mechanism. Figure 6 for Figure 5 A bottom view of the structure; Figure 7 for Figure 5 Exploded view of the structure.
[0019] In the picture: 1-Arc-shaped bearing base plate; 2-Fixed upper clamping plate; 3-Fixed lower clamping plate; 4-Cylindrical rod; 5-Modible lower clamping plate; 6-Modible upper clamping plate; 7-Fixed block; 8-Jack; 9-Connecting bolt; 10-Lifting mechanism. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] The purpose of this invention is to provide a fiber cloth prestressing tensioning device with a liftable arc structure to solve the problems existing in the prior art, while taking into account small space occupation, convenient construction, and strong adaptability.
[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] Example 1 This embodiment provides a liftable arc-shaped fiber cloth prestressing tensioning device, such as... Figures 1-7As shown, the system includes: an arc-shaped support base plate 1, the top of which has an arc-shaped top surface that can fit against the tunnel arch; a prestressing application mechanism, fixedly disposed at one end below the arc-shaped support base plate 1, the prestressing application mechanism having a built-in drive unit; a clamping mechanism, including a fixed clamp and a movable clamp, the fixed clamp being fixedly disposed at the other end below the arc-shaped support base plate 1 and arranged opposite to the prestressing application mechanism, a guide assembly being fixedly disposed between the fixed clamp and the prestressing application mechanism, the movable clamp being slidably disposed on the guide assembly, the output end of the drive unit being able to push the movable clamp to move towards the side closer to the fixed clamp, the fixed clamp and the movable clamp being used to clamp the corresponding ends of the fiber cloth respectively; and a lifting mechanism 10, used to drive the arc-shaped support base plate 1, the prestressing application mechanism and the clamping mechanism to lift and lower in the vertical direction so that the fiber cloth on the arc-shaped top surface fits against the tunnel arch.
[0024] By specially designing the top of the arc-shaped bearing base plate 1 as an arc-shaped top surface (specifically a portion of the top surface) that can fit into the tunnel arch, the problem of traditional tensioning devices designed for flat surfaces being difficult to adapt to arc-shaped structures is solved, providing a foundation for the uniform distribution of prestress on the arc surface. Secondly, the collaborative working mode of the clamping mechanism (including fixed clamps and movable clamps) and the prestressing application mechanism allows the tensioning operation of the fiber cloth to be completed in a compact space below the arc-shaped bearing base plate 1. The drive unit pushes the movable clamps to move along the guide assembly, achieving efficient and linear tensioning of the fiber cloth and ensuring accurate application of prestress. The function of the lifting mechanism 10 is to lift the entire tensioning device (including the arc-shaped bearing base plate 1, the prestressing application mechanism, and the clamping mechanism) as a whole after tensioning is completed, so that the tensioned and adhesive-coated fiber cloth is firmly attached to the tunnel arch. This construction method of tensioning first at the ground or at a convenient height and then lifting the whole device greatly reduces the need for high-altitude and narrow working space at the tunnel arch, thereby effectively overcoming the fatal defects of existing technology devices that occupy a large space and have poor applicability in confined spaces.
[0025] Specifically, this device has a simple structure, is easy to operate, easy to install, and convenient and quick to implement, making it easy to function within tunnel structures.
[0026] The following are the relevant settings for the arc-shaped support substrate 1: Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, the arc-shaped support substrate 1 includes an arc-shaped plate and a base plate; the base plate is located below the arc-shaped plate, and the two ends of the arc-shaped plate are respectively connected to the corresponding ends of the base plate to form a ring structure (i.e., as shown). Figure 1 , Figure 2 , Figure 5 and Figure 7As shown, a circumferential closed structure is formed. The two ends of the arc-shaped plate are connected to the ends of the base plate through arc-shaped connecting surfaces. The fixing clamps and prestressing application mechanisms are fixedly installed below the corresponding ends of the base plate.
[0027] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, the arc-shaped connecting surface is tangent to the arc-shaped top surface and the bottom surface of the base plate.
[0028] Specifically, both the curved plate and the base plate are made of steel plates.
[0029] Specifically, the radius of curvature of the arc surface on the part of the arc-shaped top surface used to attach the fiber cloth to the tunnel arch is consistent with the tunnel design value, and the corresponding arc angle of the part attached to the tunnel arch is 90°.
[0030] Specifically, the partially curved top surface can completely fit the inner curved surface of the tunnel, thereby achieving uniform application of prestressed fiber cloth to the tunnel structure cracks.
[0031] The following are the relevant settings for the prestressing application mechanism: Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 7 As shown, there is a reserved gap between the prestressing application mechanism and the base plate; after the fiber cloth passes around the arc-shaped top surface, the end away from the fixed clamp passes through the reserved gap and is fixed and clamped by the movable clamp.
[0032] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 7 As shown, the prestressing application mechanism is a fixed block 7, and the driving unit includes two jacks 8. The fixed block 7 is fixedly installed below one end of the base plate (the fixed block 7 and the base plate are provided with openings or corresponding threaded holes at corresponding positions and are fixedly connected by bolts). A U-shaped groove is provided on the top of the fixed block 7, with the opening of the U-shaped groove facing the base plate and forming a reserved gap together with part of the lower surface of the base plate. A guide component is fixedly installed between the fixed block 7 and the fixed clamp. Two receiving grooves are provided on the side wall of the fixed block 7 near the fixed clamp, with the opening of the receiving grooves facing the fixed clamp. The receiving grooves correspond one-to-one with the jacks 8, and the jacks 8 are fixedly installed in the receiving grooves (specifically, they can be fixed by welding). The output end of the jacks 8 is used to push the movable clamp to move.
[0033] The following are the specifications regarding the clamping mechanism: Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 5-7As shown, the fixed clamp includes a fixed upper clamping plate 2 and a fixed lower clamping plate 3; the movable clamp includes a movable upper clamping plate 6 and a movable lower clamping plate 5; the clamping surfaces between the fixed upper clamping plate 2 and the fixed lower clamping plate 3, and between the movable upper clamping plate 6 and the movable lower clamping plate 5, are all multi-arc clamping surfaces that fit together and are continuous arc surfaces (taking the fixed clamp as an example, the clamping surface of the fixed upper clamping plate 2 is fixed with multiple adjacent upper arc-shaped protrusions, and the clamping surface of the fixed lower clamping plate 3 is fixed with multiple adjacent lower arc-shaped protrusions, each lower arc-shaped protrusion corresponding to the position between two adjacent upper arc-shaped protrusions, and the clamping surface formed by this structure is a multi-arc clamping surface; where, fitting together means that each lower arc-shaped protrusion corresponds to the position between two adjacent upper arc-shaped protrusions, and the arc surface of the lower arc-shaped protrusion matches the arc surface of these two adjacent upper arc-shaped protrusions; continuous arc surface refers to the continuous arc surface formed by closely arranged protrusions).
[0034] Specifically, the movable lower clamping plate 5 and the movable upper clamping plate 6 are provided with corresponding connecting holes, and the movable lower clamping plate 5 and the movable upper clamping plate 6 are fixedly connected by bolts.
[0035] In the optional embodiments of this example, a preferred option is that the multi-arc clamping surface is a frosted surface. This is used to increase the friction between the fiber cloth and the fixed and movable clamps.
[0036] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 5-7 As shown, the guide assembly includes two parallel cylindrical rods 4. The ends of the cylindrical rods 4 near the fixed block 7 are fixedly connected to the fixed block 7 (a through hole is opened on the movable lower clamping plate 5 of the movable clamp corresponding to the position of the cylindrical rod 4, and the cylindrical rod 4 slides through the through hole).
[0037] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 5-7 As shown, the base plate has multiple first connecting holes, the upper clamping plate 2 has multiple second connecting holes, and the lower clamping plate 3 has multiple third connecting holes; the first connecting holes, second connecting holes, and third connecting holes are all one-to-one and are fixed together by a connecting bolt 9.
[0038] Specifically, for the fixing clamp, the connecting holes on the base plate, the upper fixing clamp 2 and the lower fixing clamp 3 form a U-shape, and the position where there is no connecting hole at the opening is used for the corresponding end of the fiber cloth to be inserted.
[0039] The following are the relevant settings for the lifting mechanism 10: Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1-3As shown, the lifting mechanism 10 is a scissor lift platform, and the drive of the lifting mechanism 10 is an electro-hydraulic drive. Its lifting speed is adjustable to ensure impact-free contact with the tunnel arch.
[0040] Specifically, the lifting mechanism 10 can effectively solve the problem of difficult fiber cloth pasting at the arch.
[0041] Regarding the usage instructions: Specifically, in use, one end of the fiber cloth is clamped onto the fixed clamp, the fiber cloth is wrapped around the curved plate, passes through the reserved gap of the prestressing mechanism on the right, and is finally clamped by the movable clamp; the next step is to apply a force to the left to the movable clamp through the jack 8 in the prestressing mechanism (such as... Figure 5 and Figure 7 In the middle, near the fixed clamp, the fiber cloth is tensioned, thereby applying prestress.
[0042] After the prestress is applied, an adhesive is applied to the surface of the fiber cloth. The arc-shaped bearing plate 1 with the prestress application mechanism and clamping mechanism is fixed to the lifting mechanism 10 with bolts. Finally, the lifting mechanism 10 is used to lift the plate and tightly connect it to the tunnel arch. After the adhesive is completely cured, the fixing clamps and the fixing connectors of the movable clamps on the left and right sides (such as connecting bolts 9) are removed. The excess fiber cloth is then cut off, and the prestressed fiber cloth reinforcement inside the tunnel structure is finally achieved.
[0043] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A prestressed tensioning device for fiber cloth with a liftable arc-shaped structure, characterized in that: include: An arc-shaped support base plate has an arc-shaped top surface, and a portion of the arc-shaped top surface can fit into the tunnel arch. A prestressing application mechanism is fixedly disposed at one end below the arc-shaped bearing base plate, and the prestressing application mechanism has a built-in drive unit. The clamping mechanism includes a fixed clamp and a movable clamp. The fixed clamp is fixedly disposed at the other end below the arc-shaped support base plate and is arranged opposite to the prestressing application mechanism. A guide assembly is fixedly disposed between the fixed clamp and the prestressing application mechanism. The movable clamp is slidably disposed on the guide assembly. The output end of the drive unit can push the movable clamp to move towards the side closer to the fixed clamp. The fixed clamp and the movable clamp are used to clamp the corresponding ends of the fiber cloth respectively. The lifting mechanism is used to drive the arc-shaped bearing base plate, the prestressing application mechanism and the clamping mechanism to move up and down in the vertical direction so that the fiber cloth on the arc-shaped top surface is in contact with the tunnel arch.
2. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 1, characterized in that: The arc-shaped support substrate includes an arc plate and a base plate; The base plate is located below the arc-shaped plate, and the two ends of the arc-shaped plate are respectively connected to the corresponding ends of the base plate to form a ring structure; the two ends of the arc-shaped plate are respectively connected to the ends of the base plate through arc-shaped connecting surfaces; The fixing clamp and the prestressing application mechanism are respectively fixed below the corresponding ends of the base plate.
3. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 2, characterized in that: There is a reserved gap between the prestressing application mechanism and the base plate; After the fiber cloth passes around the arc-shaped top surface, the end of it away from the fixed clamp passes through the reserved gap and is fixedly held by the movable clamp.
4. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 3, characterized in that: The prestressing application mechanism is a fixed block, and the driving unit includes two jacks; The fixing block is fixedly installed below one end of the base plate. A U-shaped groove is provided above the fixing block. The opening of the U-shaped groove faces the base plate and together with a portion of the lower surface of the base plate, forms the reserved gap. The guide assembly is fixed between the fixed block and the fixed clamp. The fixed block has two receiving grooves on its side wall near the fixed clamp. The openings of the receiving grooves face the fixed clamp. The receiving grooves correspond one-to-one with the jacks, and the jacks are fixedly installed in the receiving grooves. The output end of the jacks is used to push the movable clamp to move.
5. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 1, characterized in that: The fixed clamp includes a fixed upper clamping plate and a fixed lower clamping plate; the movable clamp includes a movable upper clamping plate and a movable lower clamping plate. The clamping surfaces between the fixed upper clamping plate and the fixed lower clamping plate, as well as the clamping surfaces between the movable upper clamping plate and the movable lower clamping plate, are all multi-arc clamping surfaces that fit together vertically and are continuous arc surfaces.
6. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 5, characterized in that: The multi-arc clamping surface is a frosted surface.
7. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 4, characterized in that: The guide assembly includes two parallel cylindrical rods, each of which is fixedly connected to the fixing block at the end closest to it.
8. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 5, characterized in that: The base plate has multiple first connecting holes, the upper fixing plate has multiple second connecting holes, and the lower fixing plate has multiple third connecting holes. The first connecting hole, the second connecting hole, and the third connecting hole are all one-to-one and are fixed together by a connecting bolt.
9. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 2, characterized in that: The arc-shaped connecting surface is tangent to the arc-shaped top surface and the bottom surface of the base plate.
10. The fiber cloth prestressing tensioning device with a liftable arc-shaped structure according to claim 1, characterized in that: The lifting mechanism is a scissor lift platform, and the driver of the lifting mechanism is an electro-hydraulic drive.