A prestressed fixed-end construction device

Abstract

The present invention provides a prestressed fixed-end construction device, belonging to the field of construction. The prestressed fixed-end construction device has a restraint ring, and a prestressed tendon group is arranged at the bottom of the restraint ring. A buffer mechanism, a first support arc surface, and a second support arc surface are sequentially arranged on the side wall of the prestressed tendon group from the inside to the outside. The prestressed tendon group includes a first-stage prestressed tendon, a second-stage prestressed tendon, and a third-stage prestressed tendon. It is characterized in that the contact surface between the second-stage prestressed tendon and the first support arc surface is an arc surface adapted to the arc surface of the first support arc surface, the contact surface between the third-stage prestressed tendon and the second support arc surface is an arc surface adapted to the arc surface of the second support arc surface, and the bottom arc of the second support arc surface is adapted to the top arc of the first support arc surface. This device solves the problem of the change in the force-bearing surface of the prestressed fixing device and can make the force on the contact surface more uniform.

Description

Technical Field

[0001] The present invention belongs to the field of construction, and more particularly, relates to a construction device for a prestressed fixed end. Background Art

[0002] The prestressed fixing device is a commonly used permanent steel bar anchoring mechanical equipment in prestressed reinforced concrete. It is a commonly used steel bar anchoring tool in continuous beam structures or components, used to maintain the torque of prestressed steel bars and transfer it to concrete, also known as prestressed anchoring. When in use, it utilizes the resilience of the steel bars to compress the potentially sliding rock and soil mass or retaining structure to increase the shear strength on the sliding surface, thereby achieving the purpose of improving the stability of the rock and soil mass or retaining structure. The prestressed fixing device can be used in highway bridges, railway tunnels, modern urban overpasses, modern urban light rail stations, multi-story buildings, water conservancy projects, water prestressed anchor cables, hydroelectric dams, port logistics infrastructure construction, rock slope protection, reinforcement and anchoring, foundation reinforcement, tunnel construction, mine roof anchoring, prestressed steel bar spherical grid, subway stations, large and medium-sized public infrastructure, warehouses, industrial factories, vertical engineering buildings, lifting of heavy objects, intermittent propulsion of sliding bags, jacking of highway bridges, large ships, cement sleepers, removal of bridge rubber bearings, reinforcement and renovation of highway bridges and buildings, reinforcement projects, anti-magnetic, anti-corrosion, thermal insulation projects, steel bar bonding reinforcement, pre-tensioned beam yard construction, external prestressed steel bars, cable-stayed cables, and suspension bridges, etc.

[0003] In traditional prestressed reinforcement devices, the contact between surfaces mostly adopts a double-plane structure. However, due to the influence of external forces over a long time, the contact between surfaces may change, possibly changing from surface contact to line contact or even point contact, which will increase the impact of external forces on building materials and is more likely to cause material damage, affecting the entire building. Summary of the Invention

[0004] In view of this, the present invention provides a construction device for a prestressed fixed end, which can solve the technical problem that due to the influence of external forces over a long time, the contact between surfaces may change, possibly changing from surface contact to line contact or even point contact, which will increase the impact of external forces on building materials and is more likely to cause material damage, affecting the entire building.

[0005] The present invention is implemented as follows:

[0006] The present invention provides a prestressed fixed-end construction device, which has a restraint ring. A corrugated pipe is arranged at the top of the restraint ring, and the restraint ring is used to be fixed on the corrugated pipe. A prestressed tendon group is arranged at the bottom of the restraint ring, and a spiral rib is sleeved outside the prestressed tendon group. A buffer mechanism, a first supporting arc surface and a second supporting arc surface are sequentially arranged on the side wall of the prestressed tendon group from inside to outside. The prestressed tendon group includes a first-stage prestressed tendon, a second-stage prestressed tendon and a third-stage prestressed tendon. The first-stage prestressed tendon, the second-stage prestressed tendon and the third-stage prestressed tendon are integrally formed. The diameter of the second-stage prestressed tendon is larger than that of the first-stage prestressed tendon, and the diameter of the third-stage prestressed tendon is larger than that of the second-stage prestressed tendon. The second-stage prestressed tendon is arranged between the top of the first supporting arc surface and the bottom of the third-stage prestressed tendon, and the third-stage prestressed tendon is arranged at the top of the second supporting arc surface. Wherein, the contact surface between the second-stage prestressed tendon and the first supporting arc surface is an arc surface adapted to the arc surface of the first supporting arc surface, the contact surface between the third-stage prestressed tendon and the second supporting arc surface is an arc surface adapted to the arc surface of the second supporting arc surface, and the arc of the bottom surface of the second supporting arc surface is adapted to the arc of the top surface of the first supporting arc surface.

[0007] The technical effects of the prestressed fixed-end construction device provided by the present invention are as follows: By setting the restraint ring, the prestressed tendon group can be restricted in the restraint ring to prevent the prestressed tendon group from falling apart under the action of external forces and affecting the building quality; By setting the corrugated pipe, the device has a certain flexibility and a certain buffering effect; By setting the spiral rib, when the prestressed tendon group is deformed under external pressure, an elastic force to prevent deformation can be provided to the prestressed tendon group, making the deformation degree of the prestressed tendon group smaller and better protecting the prestressed tendon group; By setting the prestressed tendon group, the external force received can be dispersed to each prestressed tendon, enabling the device to withstand greater pressure; By setting the diameter of the second-stage prestressed tendon to be larger than that of the first-stage prestressed tendon, the first supporting arc surface can be nested on the prestressed tendon group, and can better fit with the second-stage prestressed tendon, making the contact surface receive more uniform force; By setting the contact surface between the second-stage prestressed tendon and the first supporting arc surface to be an arc surface adapted to the arc surface of the first supporting arc surface, it can prevent the device from reducing the force-bearing area of the contact surface between the second-stage prestressed tendon and the first supporting arc surface under the action of external forces for a long time, causing the contact surface between the second-stage prestressed tendon and the first supporting arc surface to receive greater pressure and resulting in damage to the device; By setting the second supporting arc surface, after the second-stage prestressed tendon cannot withstand external forces and is damaged, the second supporting arc surface can be used as a second insurance to ensure the normal operation of the device.

[0008] On the basis of the above technical solutions, the prestressed fixed-end construction device of the present invention can also be improved as follows:

[0009] Among them, the buffer mechanism includes two fan surfaces, and a buffer groove is provided between the fan surfaces.

[0010] The beneficial effect of adopting the above improvement scheme is that by providing the buffer groove, when the device is subjected to an external force, the two fan surfaces can move outward a certain distance, having a certain buffering effect.

[0011] Furthermore, connection holes and elastic connection rings are provided on the fan surfaces, and the fan surfaces are connected by the elastic connection rings.

[0012] The beneficial effect of adopting the above improvement scheme is that by providing the elastic connection rings, when the device is subjected to an external force, the fan surfaces move outward, that is, the buffer mechanism can have a certain buffering ability and can also limit the movement of the fan surfaces to prevent the fan surfaces from moving outward too much and damaging the device.

[0013] Among them, the buffer mechanism is in the shape of a circular thin sheet.

[0014] Furthermore, the inner diameter of the fan surface is adapted to the outer diameter of the first-stage prestressed tendon.

[0015] The beneficial effect of adopting the above improvement scheme is that by setting the inner diameter of the fan surface to be adapted to the outer diameter of the first-stage prestressed tendon, the fan surface can be sleeved outside the first-stage prestressed tendon, and part of the external force received by the first-stage prestressed tendon can be dispersed to the buffer mechanism, reducing the external force received by the first-stage prestressed tendon.

[0016] Among them, the prestressed tendon group is composed of multiple prestressed tendons, and the number of the second support arc surfaces, buffer mechanisms, and extrusion sleeves is the same as the number of prestressed tendons.

[0017] The beneficial effect of adopting the above improvement scheme is that by making the number of prestressed tendons in the prestressed tendon group the same as the number of the second support arc surfaces, buffer mechanisms, and extrusion sleeves, the external force received by each prestressed tendon can be dispersed, increasing the overall pressure-bearing capacity of the device.

[0018] Among them, the inner diameter of the spiral tendon is smaller than the width of the first support arc surface.

[0019] Among them, a first through hole is provided on the first support arc surface, and a second through hole is provided on the second support arc surface.

[0020] Among them, an extrusion sleeve is further included, and the extrusion sleeve is sleeved on the third-stage prestressed tendon.

[0021] The beneficial effect of adopting the above improvement scheme is that by providing the extrusion sleeve, the third-stage prestressed tendon can be protected and the pressure received by the third-stage prestressed tendon can be dispersed.

[0022] Wherein, rubber pads are provided on the top surfaces of the first supporting arc surface and the second supporting arc surface.

[0023] The beneficial effects of adopting the above improvement scheme are as follows: By providing rubber pads on the top surfaces of the first supporting arc surface and the second supporting arc surface, the friction between the contact surfaces of the first supporting arc surface and the second-stage prestressed tendons can be reduced, wear can be reduced, and the service life of the device can be prolonged.

[0024] Compared with the prior art, the beneficial effects of a prestressed fixed-end construction device provided by the present invention are as follows: By providing a restraint ring, the prestressed tendon group can be restricted within the restraint ring to prevent the prestressed tendon group from falling apart under the action of external forces and affecting the building quality; By providing a corrugated pipe, the device has a certain flexibility and a certain buffering effect; By providing spiral ribs, when the prestressed tendon group is deformed under external pressure, elastic force to prevent deformation can be provided to the prestressed tendon group, making the deformation degree of the prestressed tendon group smaller and better protecting the prestressed tendon group; By providing a prestressed tendon group, the external force received can be dispersed to each prestressed tendon, enabling the device to withstand greater pressure; By setting the diameter of the second-stage prestressed tendon to be larger than that of the first-stage prestressed tendon, the first supporting arc surface can be nested on the prestressed tendon group, and can be better fitted with the second-stage prestressed tendon, making the force on the contact surface more uniform; By setting the contact surface between the second-stage prestressed tendon and the first supporting arc surface to be an arc surface adapted to the arc surface of the first supporting arc surface, it can prevent the device from reducing the force-bearing area of the contact surface between the second-stage prestressed tendon and the first supporting arc surface under the action of external forces for a long time, causing the contact surface between the second-stage prestressed tendon and the first supporting arc surface to receive greater pressure and resulting in damage to the device; By providing a second supporting arc surface, after the second-stage prestressed tendon cannot withstand external forces and is damaged, the second supporting arc surface can be used as a second insurance to ensure the normal operation of the device. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the overall prestressed fixed-end construction device;

[0027] Figure 2 It is a schematic diagram of the first supporting arc surface of the prestressed fixed-end construction device;

[0028] Figure 3 It is a schematic diagram of the second supporting arc surface of the prestressed fixed-end construction device;

[0029] Figure 4 Schematic diagram of the prestressing tendon group of the prestressed fixed end construction device;

[0030] Figure 5 Schematic diagram of the buffer mechanism of the prestressed fixed end construction device.

[0031] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0032] 1. Constraint ring; 2. First support arc surface; 21. First through hole; 3. Second support arc surface; 31. Second through hole; 4. Spiral rib; 5. Prestressing tendon group; 51. First-stage prestressing tendon; 52. Second-stage prestressing tendon; 53. Third-stage prestressing tendon; 6. Buffer mechanism; 61. Sector; 62. Elastic connection ring; 63. Buffer groove; 64. Connection hole; 7. Bellows; 8. Extrusion sleeve. Specific embodiments

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0038] As Figure 1 shown in FIG. 4, it is the first embodiment of a prestressed fixed-end construction device provided by the present invention. In this embodiment, there is a restraint ring 1, a corrugated pipe 7 is arranged at the top of the restraint ring 1, the restraint ring 1 is used to be fixed on the corrugated pipe 7, a prestressed tendon group 5 is arranged at the bottom of the restraint ring 1, a spiral rib 4 is sleeved outside the prestressed tendon group 5, and a buffer mechanism 6, a first support arc surface 2, and a second support arc surface 3 are sequentially arranged on the side wall of the prestressed tendon group 5 from the inside to the outside. The prestressed tendon group 5 includes a first-stage prestressed tendon 51, a second-stage prestressed tendon 52, and a third-stage prestressed tendon 53. The first-stage prestressed tendon 51, the second-stage prestressed tendon 52, and the third-stage prestressed tendon 53 are integrally formed. The diameter of the second-stage prestressed tendon 52 is larger than that of the first-stage prestressed tendon 51, and the diameter of the third-stage prestressed tendon 53 is larger than that of the second-stage prestressed tendon 52. The second-stage prestressed tendon 52 is arranged between the top of the first support arc surface 2 and the bottom of the third-stage prestressed tendon 53, and the third-stage prestressed tendon 53 is arranged at the top of the second support arc surface 3. Among them, the contact surface between the second-stage prestressed tendon 52 and the first support arc surface 2 is an arc surface adapted to the arc surface of the first support arc surface 2, the contact surface between the third-stage prestressed tendon 53 and the second support arc surface 3 is an arc surface adapted to the arc surface of the second support arc surface 3, and the bottom arc of the second support arc surface 3 is adapted to the top arc of the first support arc surface 2.

[0039] During use, a plurality of such devices are placed in the space between the inner edge steel bars of the load-bearing beam. During the completion process of the load-bearing beam, the device will be subjected to external pressure from other building materials, causing the first support arc surface 2 to start playing a pressure-bearing role. After the first support arc surface 2 is subjected to external pressure, it will drive the first support arc surface 2 to start deforming. The displacement of the deformation exerts pressure on the prestressed tendon group 5, driving the prestressed tendon group 5 to deform. The displacement of the deformation of the prestressed tendon group 5 exerts pressure on the spiral rib 4 and the buffer mechanism 6. The spiral rib 4 and the buffer mechanism 6, through their own elastic potential energy, restrain the displacement of the prestressed tendon group 5, limit the degree of deformation of the prestressed tendon group 5, and thus limit the degree of deformation of the first support arc surface 2 and disperse the pressure received by the first support arc surface 2.

[0040] As Figure 5 shown in the above technical solution, the buffer mechanism 6 includes two fan-shaped surfaces 61, and a buffer groove 63 is formed between the fan-shaped surfaces 61.

[0041] During use, after the first-stage prestressing tendon 51 deforms under an external force, the contact fan-shaped surface 61 is driven to move outward, and the elastic connecting ring 62 restricts the outward-moving fan-shaped surface 61, limiting its continuous outward movement.

[0042] Furthermore, in the above technical solution, connection holes 64 and an elastic connecting ring 62 are provided on the fan-shaped surface 61, and the fan-shaped surfaces 61 are connected by the elastic connecting ring 62.

[0043] During use, the elastic connecting ring 62 is passed through the connection hole 64 to connect the two fan-shaped surfaces 61.

[0044] Among them, in the above technical solution, the buffer mechanism 6 is in the shape of a circular thin sheet.

[0045] Furthermore, in the above technical solution, the inner diameter of the fan-shaped surface 61 is adapted to the outer diameter of the first-stage prestressing tendon 51.

[0046] During use, the buffer mechanism 6 is sleeved outside the first-stage prestressing tendon 51.

[0047] Among them, in the above technical solution, the prestressing tendon group 5 is composed of multiple prestressing tendons, and the number of the second support arc surface 3, the buffer mechanism 6, and the extrusion sleeve 8 is the same as the number of prestressing tendons.

[0048] During use, when each prestressing tendon deforms due to an external pressure, it can be restricted by the second support arc surface 3, the buffer mechanism 6, and the extrusion sleeve 8, limiting the degree of deformation of the prestressing tendon and dispersing the external force received by each prestressing tendon.

[0049] Among them, in the above technical solution, the inner diameter of the spiral rib 4 is smaller than the width of the first support arc surface 2.

[0050] As Figure 2 , as shown in FIG. 3, in the above technical solution, a first through hole 21 is provided on the first support arc surface 2, and a second through hole 31 is provided on the second support arc surface 3.

[0051] During use, the first through hole 21 and the second through hole 31 are respectively sleeved outside the first support arc surface 2 and the second support arc surface 3.

[0052] Among them, in the above technical solution, an extrusion sleeve 8 is further included, and the extrusion sleeve 8 is sleeved on the third-stage prestressing tendon 53.

[0053] During use, the extrusion sleeve 8 is sleeved outside the third-stage prestressing tendon 53.

[0054] Among them, in the above technical solution, rubber pads are provided on the top surfaces of the first support arc surface 2 and the second support arc surface 3.

[0055] Specifically, the principle of the present invention is as follows: A plurality of these devices are placed in the space between the inner-edge steel bars of the load-bearing beam. During the completion process of the load-bearing beam, the devices will be subjected to external pressure from other building materials, causing the first supporting arc surface 2 to start playing a pressure-bearing role. After the first supporting arc surface 2 is subjected to external pressure, it will drive the first supporting arc surface 2 to start deforming. The displacement of the deformation exerts pressure on the prestressed tendon group 5, driving the prestressed tendon group 5 to deform. The displacement of the deformation of the prestressed tendon group 5 exerts pressure on the spiral reinforcement 4 and the buffer mechanism 6. The spiral reinforcement 4 and the buffer mechanism 6, through their own elastic potential energy, restrain the displacement of the prestressed tendon group 5, limit the degree of deformation of the prestressed tendon group 5, and further limit the degree of deformation of the first supporting arc surface 2, dispersing the pressure received by the first supporting arc surface 2.

[0056] The above is only the specific implementation manner 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 can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A prestressed fixed-end construction device, having a restraint ring (1), a corrugated pipe (7) is arranged at the top of the restraint ring (1), the restraint ring (1) is used to be fixed on the corrugated pipe (7), a prestressed tendon group (5) is arranged at the bottom of the restraint ring (1), a spiral reinforcement (4) is sleeved outside the prestressed tendon group (5), a buffer mechanism (6), a first support arc surface (2), and a second support arc surface (3) are sequentially arranged on the side wall of the prestressed tendon group (5) from inside to outside. The prestressed tendon group (5) includes a first-stage prestressed tendon (51), a second-stage prestressed tendon (52), and a third-stage prestressed tendon (53). The first-stage prestressed tendon (51), the second-stage prestressed tendon (52), and the third-stage prestressed tendon (53) are integrally formed. The diameter of the second-stage prestressed tendon (52) is larger than that of the first-stage prestressed tendon (51), and the diameter of the third-stage prestressed tendon (53) is larger than that of the second-stage prestressed tendon (52). The second-stage prestressed tendon (52) is arranged between the top of the first support arc surface (2) and the bottom of the third-stage prestressed tendon (53), and the third-stage prestressed tendon (53) is arranged at the top of the second support arc surface (3); characterized in that, The contact surface of the second-stage prestressed tendon (52) and the first support arc surface (2) is an arc surface adapted to the arc surface of the first support arc surface (2). The contact surface of the third-stage prestressed tendon (53) and the second support arc surface (3) is an arc surface adapted to the arc surface of the second support arc surface (3). The bottom arc of the second support arc surface (3) is adapted to the top arc of the first support arc surface (2).

2. The prestressed fixed-end construction device according to claim 1, characterized in that The buffer mechanism (6) includes two fan surfaces (61), and a buffer groove (63) is formed between the fan surfaces (61).

3. The prestressed fixed-end construction device according to claim 2, characterized in that, The fan surface (61) is provided with a connection hole (64) and an elastic connection ring (62), and the fan surfaces (61) are connected by the elastic connection ring (62).

4. The prestressed fixed end construction device according to claim 1, characterized in that, The buffer mechanism (6) is in the shape of a circular thin sheet.

5. The prestressed fixed-end construction device according to claim 2, characterized in that, The inner diameter of the fan surface (61) is adapted to the outer diameter of the first-stage prestressed tendon (51).

6. The prestressed fixed-end construction device according to claim 1, characterized in that The prestressed tendon group (5) is composed of multiple prestressed tendons, and further includes an extrusion sleeve (8). The extrusion sleeve (8) is sleeved on the third-stage prestressed tendon (53). The numbers of the second support arc surface (3), the buffer mechanism (6), and the extrusion sleeve (8) are the same as the number of prestressed tendons.

7. A prestressed fixed-end construction device according to claim 1, characterized in that, The inner diameter of the spiral reinforcement (4) is smaller than the width of the first support arc surface (2).

8. A prestressed fixed-end construction device according to claim 1, characterized in that, A first through hole (21) is formed on the first support arc surface (2), and a second through hole (31) is formed on the second support arc surface (3).

9. The prestressed fixed end construction device according to claim 1, characterized in that, Rubber pads are arranged on the top surfaces of the first support arc surface (2) and the second support arc surface (3).

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