A prestressed corrugated plate tensioning support

Abstract

This utility model discloses a prestressed corrugated plate tensioning support, which includes a load-bearing frame, a tensioning mechanism, and a guiding mechanism. The load-bearing frame consists of a base plate, side plates, guide partition columns, and a comb-shaped guide cable plate. Several independent guide channels are formed between adjacent guide partition columns, and guide cable grooves are provided on the comb-shaped guide cable plate. The tensioning mechanism includes a tensioning device mounting base, a horizontal guide frame, a jack, and a reaction beam. The reaction beam is movably disposed between the horizontal guide frames and connected to the jack, and has cable-threading fixing holes. The guiding mechanism includes a guide horizontal axis and cable-threading guide holes. The guide cable grooves, guide channels, and cable-threading guide holes are aligned sequentially to form a cable-threading path. This utility model can simultaneously arrange and tension multiple prestressed steel cables, realizing the longitudinal to lateral force conversion, ensuring uniform cable force transmission, and avoiding offset and stress concentration. Its overall structure is stable and facilitates rapid construction in space-constrained environments.

Description

Technical Field

[0001] This utility model relates to the technical field of construction equipment for corrugated plate prestressed structures, and more specifically, to a prestressed corrugated plate tensioning support. Background Technology

[0002] In the construction of prestressed corrugated slab structures, the tensioning of prestressed cables is a crucial step in ensuring the structural performance. Currently, there is no dedicated tensioning system for corrugated slab units; construction often relies on general-purpose anchoring devices or temporary assembly clamps to complete the cable tensioning. These methods are typically not designed for corrugated slab structures and lack a load-bearing system that matches their end construction, resulting in problems such as complex operation, insufficient positioning accuracy, and uneven cable force control.

[0003] When multiple cables need to be tensioned simultaneously, existing general-purpose devices often cannot achieve synchronous force application, resulting in uneven stress on each cable, which can easily lead to cable force deviation and affect the overall stress uniformity and structural performance. At the same time, the reaction force generated during tensioning is concentrated on local end plates or hole areas, lacking a reasonable dispersion and support mechanism, which can easily cause local stress concentration and structural damage.

[0004] Furthermore, in situations where space is limited, such as in tunnels, culverts, or bridge reinforcement, traditional construction methods are difficult to arrange equipment, inefficient, and often require separate tensioning and anchoring processes, lacking integrated design, which increases construction steps and error risks.

[0005] In summary, there is an urgent need for a specialized tensioning support that can stably bear loads, uniformly transmit force, and adapt to tensioning of multiple cables. Summary of the Invention

[0006] This invention proposes a prestressed corrugated plate tensioning support, which solves the problems in the prior art of lacking a specialized tensioning system and being unable to achieve efficient synchronous tensioning and reliable anchoring of multiple prestressed cables.

[0007] To achieve the above objectives, the technical solution proposed by this utility model is as follows:

[0008] A prestressed corrugated plate tensioning support, the tensioning support comprising a load-bearing frame, a tensioning mechanism and a guiding mechanism disposed within the load-bearing frame;

[0009] The load-bearing frame includes a base plate, side plates, guide partition columns, and comb-shaped guide cable plates. The base plate is located at the lower end, and two side plates are erected along both ends of the base plate and are vertically fixed to the base plate. A number of guide partition columns are spaced apart between the two side plates. The guide partition columns are fixed to the base plate and extend upward. The comb-shaped guide cable plates are horizontally fixed to the upper ends of the side plates and the guide partition columns. A number of independent guide channels are formed between adjacent guide partition columns.

[0010] The tensioning mechanism includes a tensioning device mounting base, horizontal guide frames, jacks, and a reaction beam; the tensioning device mounting base is fixed to one side of the load-bearing frame, the two horizontal guide frames are fixed at both ends of the tensioning device mounting base and perpendicular to the load-bearing frame, the reaction beam is movably disposed between the two horizontal guide frames, and the bottom end and piston end of the jack are fixed to the tensioning device mounting base and the reaction beam, respectively.

[0011] The guiding mechanism includes a guide cable groove, a guide horizontal shaft, and a cable threading guide hole; multiple guide cable grooves are evenly opened on the upper edge of the comb-shaped guide cable plate; the guide horizontal shaft is horizontally arranged in the lower part of the load-bearing frame, passes through several guide channels, and is connected to the two side upright plates; multiple cable threading guide holes are opened on the tensioning device mounting base, and the guide cable groove, guide channel, and cable threading guide hole are aligned in sequence.

[0012] Furthermore, a plurality of cable-threading fixing holes are provided along the transverse direction of the reaction beam, and the cable-threading fixing holes correspond one-to-one with the cable-threading guide holes.

[0013] Furthermore, the guide groove on the comb-shaped guide plate has an opening, and its cross-section is U-shaped.

[0014] Furthermore, the guide shaft is a detachable round shaft, and both ends of the guide shaft are connected to the side plate through shaft seats.

[0015] Furthermore, several parallel triangular stiffening plates are provided at the connection between the side plate and the tensioning device mounting base.

[0016] Furthermore, the tensioning mechanism includes two jacks, which are located at both ends of the tensioning device mounting base.

[0017] Furthermore, replaceable wear-resistant bushings are provided in the guide cable groove and the cable threading guide hole.

[0018] Furthermore, the comb-shaped guide cable plate is provided with a plurality of side plate fixing holes, which are arranged at intervals along the lateral direction, and the plurality of side plate fixing holes are staggered with a plurality of guide cable grooves in sequence.

[0019] Furthermore, the inner side of the horizontal guide frame is provided with a rail groove, and the two ends of the reaction beam are provided with sliders, which are embedded in the rail groove.

[0020] Furthermore, a formwork space for forming concrete anchorage is provided within the guide channel, and formwork can be arranged and concrete poured within the formwork space.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] This invention, by setting guide channels, cable grooves, and cable guide holes within the load-bearing frame, enables multiple prestressed cables to be arranged synchronously and remain independent, ensuring uniform stress during tensioning. Jacks and reaction beams are arranged along the horizontal guide frame, forming a stable longitudinal tensioning and lateral reaction force transmission path, avoiding deviation and uneven stress. Comb-shaped cable guide plates and guide partitions jointly define the cable passage, allowing the longitudinal prestressed cables to turn orderly and be tensioned centrally within a limited space, adapting to narrow construction sites. Side plate fixing holes stabilize the corrugated plate unit position during tensioning, improving overall stability. The overall structure is simple, facilitating rapid on-site assembly and synchronous tensioning of multiple prestressed cables, ensuring reliable stress distribution and construction efficiency.

[0023] Of course, implementing the various technical solutions of this utility model does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0024] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the usage state of an embodiment of this utility model;

[0026] In the diagram, 1-comb-shaped guide plate, 2-guide cable groove, 3-side plate fixing hole, 4-side upright plate, 5-guide horizontal shaft, 6-triangular stiffening plate, 7-tensioning device mounting base, 8-cable threading guide hole, 9-jack, 10-reaction beam, 11-horizontal guide frame, 12-guide dividing column, 13-base plate, 14-steel cable, 15-corrugated plate unit. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0028] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent 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. Therefore, they should not be construed as limitations on this patent.

[0029] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0030] Example 1:

[0031] See Figures 1 to 3 This utility model provides a tensioning support for prestressed corrugated plates. The tensioning support mainly consists of a load-bearing frame, a tensioning mechanism, and a guiding mechanism, and is used as a whole to tension, guide, and anchor the prestressed steel cables 14 in the prestressed corrugated plates.

[0032] The load-bearing frame includes a base plate 13, side plates 4, guide partition columns 12, and a comb-shaped guide cable plate 1. The base plate 13 is located at the lower end, and two side plates 4 are arranged vertically along both ends of the base plate 13 and are fixedly connected to the base plate 13 vertically. Several guide partition columns 12 are arranged horizontally between the two side plates 4. The bottom end of the partition column is fixed to the base plate 13, extends upward and is fixedly connected to the lower surface of the comb-shaped guide cable plate 1, thus forming an integral rigid frame with the side plates 4, the base plate 13 and the comb-shaped guide cable plate 1. The comb-shaped guide cable plate 1 is horizontally fixed at the upper end of the load-bearing frame. The comb teeth are evenly distributed with guide cable grooves 2 in the horizontal direction, thus forming several independent guide channels between adjacent guide partition columns 12. This structure can achieve the separation and guidance of multiple parallel prestressed steel cables 14, avoid mutual interference, and maintain uniform stress. The comb-shaped guide cable plate 1 is also provided with side plate positioning holes 3, which can be used to temporarily fix the side plate to the support by bolts when installing the corrugated plate unit 15.

[0033] The tensioning mechanism consists of a tensioning device mounting base 7, horizontal guide frames 11, a tensioning device 9, and a reaction beam 10. The tensioning device mounting base 7 is fixed to one side of the load-bearing frame and connected to the side upright plate 4. Two horizontal guide frames 11 are fixed to both ends of the mounting base 7 and extend horizontally, remaining perpendicular to the load-bearing frame. The reaction beam 10 is movably disposed between the two horizontal guide frames 11, and its two ends are connected to the guide frame's rail grooves via sliders, allowing it to move horizontally. In this embodiment, the tensioning device 9 is preferably a jack, and the bottom end of the tensioning device 9 is fixed. On the mounting base 7, its piston end is fixedly connected to the reaction beam 10, so that when the tensioning device 9 extends or retracts, it drives the reaction beam 10 to move, forming a tensioning effect on the steel cable 14; the reaction beam 10 has several cable-passing fixing holes arranged in the transverse direction, and these cable-passing fixing holes correspond one-to-one with the cable-passing guide holes 8 on the mounting base 7, ensuring that the steel cable 14 maintains a stable position during the tensioning process; in order to improve the stability of the frame, several triangular stiffening plates 6 are also arranged between the side upright plate 4 and the mounting base 7 to bear the local stress when the tensioning device 9 transmits thrust.

[0034] In this embodiment, the tensioning mechanism of the prestressed corrugated plate tensioning support is provided with two tensioning devices; the two tensioning devices 9 are symmetrically installed at both ends of the tensioning device mounting base 7 and are respectively connected to both ends of the reaction beam 10; through the arrangement of double jacks, the reaction beam 10 is subjected to more balanced forces during the tensioning process, and can simultaneously apply synchronous tensioning force to multiple prestressed steel cables 14; compared with the single jack drive, this structure can effectively reduce the eccentric force and tilting deformation of the reaction beam 10, and improve the tensioning accuracy and stability; for working conditions that require large-tonnage tensioning or multiple steel cables 14 to be arranged in parallel, the double jack configuration can significantly improve construction efficiency and force uniformity, ensuring that each prestressed steel cable 14 obtains a consistent tensioning effect.

[0035] The guiding mechanism includes cable guide grooves 2 on the comb-shaped guide plate 1, a guide horizontal shaft 5 at the bottom of the load-bearing frame, and cable threading guide holes 8 on the tensioning device mounting base 7. Multiple cable guide grooves 2 are evenly opened on the upper edge of the comb-shaped guide plate 1 to initially separate and limit the steel cables 14. The guide horizontal shaft 5 is horizontally installed through the bottom of the load-bearing frame and connected to two side upright plates 4 through a shaft seat. The guide horizontal shaft 5 is used to turn and guide the steel cables 14, changing their running direction from longitudinal to transverse, so that the steel cables 14 can be tensioned in the horizontal direction. Several cable threading guide holes 8 are opened on the tensioning device mounting base 7 and are aligned with the cable guide grooves 2 and the guide channels in sequence to form a through cable threading path. To reduce the friction and wear of the steel cables 14 during the tensioning process, replaceable wear-resistant bushings can be installed in the cable guide grooves 2 and the cable threading guide holes 8.

[0036] During use, the prestressed steel cables 14 can pass sequentially through the guide cable groove 2, guide channel, guide horizontal shaft 5, and cable guide hole 8, and be fixed in the cable fixing hole of the reaction beam 10 by mechanical anchors; then, the tensioning device 9 applies a thrust to the reaction beam 10 to achieve synchronous tensioning of the steel cables 14; since the guide channel can separate and position multiple steel cables 14, and with the uniform distribution design of the comb-shaped guide plate 1, it can ensure that multiple steel cables 14 are subjected to uniform force, avoid mutual crossing or offset, and improve tensioning accuracy and construction efficiency; in addition, the support as a whole can be directly placed in the predetermined position on the construction site, and its base plate is fixed to the foundation or platform, ensuring the stability of the entire tensioning process.

[0037] The prestressed corrugated plate tensioning support described in this embodiment, through the synergistic effect of the load-bearing frame, tensioning mechanism and guiding mechanism, realizes the synchronous tensioning and reliable guidance of multiple steel cables, and solves the problems of steel cable dispersion, insufficient tensioning accuracy and limited site space in traditional construction. It provides a stable and efficient construction equipment for the assembly and reinforcement of prestressed corrugated plate structures.

[0038] Example 2:

[0039] In this embodiment, a formwork space is provided within the guide channel of the load-bearing frame for pouring concrete to form a permanent anchorage. During construction, formwork is arranged within the guide channel, and concrete is poured directly into the formwork space after the cables are threaded. After the concrete solidifies, the prestressed steel cables form an integral unit with the load-bearing frame through the concrete anchor body, replacing conventional mechanical anchors or concrete anchor blocks. On the one hand, the concrete anchor body can provide a large area of ​​wrapping and bonding for the steel cables within the guide channel, improving anchorage strength and durability. On the other hand, this scheme reduces the installation steps of independent anchors, simplifying the tensioning and anchoring process. This embodiment is particularly suitable for working conditions where site space is limited and it is inconvenient to install large anchors, ensuring both anchorage reliability and construction convenience.

[0040] The tensioning method for the prestressed corrugated plate tensioning support in this embodiment includes the following steps:

[0041] S1 Tensioning Support Installation: Move the prestressed corrugated plate tensioning support to the construction position, aligning the comb-shaped guide plate with the lower edge plate of the corrugated plate unit. Secure the support to the corrugated plate unit using high-strength bolts, aligning the fixing holes on the side plates of the comb-shaped guide plate with the pre-fabricated connection holes on the lower edge plate of the corrugated plate unit. This ensures a stable connection between the tensioning support and the corrugated plate unit, providing an accurate reference and stable load-bearing conditions for subsequent cable threading and tensioning operations.

[0042] S2 Cable Insertion and Positioning: The prestressed steel cable is sequentially passed through the guide groove on the comb-shaped guide plate, the guide channel formed between adjacent guide partitions, and then passes through the cable insertion guide hole on the tensioning device mounting base after passing around the guide horizontal axis from the bottom. This changes the direction of the prestressed steel cable, turning it to the horizontal direction to facilitate tensioning.

[0043] S3 Cable End Fixing: Insert one end of the prestressed steel cable into the cable fixing hole on the reaction beam and temporarily fix it with mechanical anchors such as wedge anchors or nut anchors; leave the other end of the steel cable as tension allowance.

[0044] S4 Apply prestressing force: Arrange jacks on the tensioning device mounting base on one side of the load-bearing frame, start the jacks and apply tension force to the prestressed steel cable in stages and symmetrically, so that it gradually reaches the design prestressing force value; during the tensioning process, the guide cable groove and guide channel constrain the position of the steel cable to avoid skew and local wear, and ensure tensioning accuracy and uniform cable force.

[0045] S5 Anchoring Locking: After the steel cable is tensioned to the design value, the exposed section is permanently locked using end anchors to reliably maintain the prestress and complete the anchor sealing operation.

[0046] S6 Post-treatment (optional): Under certain working conditions, a template can be set up in the guide channel and concrete can be poured in. After the concrete solidifies, it forms a concrete anchor body, achieving secondary consolidation of the cable ends and further improving anchoring stability and durability. After the strength of the filling layer meets the requirements, the prestressed corrugated plate tensioning support can be removed, and excess cable ends can be cut off to ensure the structural appearance and durability.

[0047] In summary, this utility model's prestressed corrugated plate tensioning support, through the coordinated action of the load-bearing frame, tensioning mechanism, and guiding mechanism, enables multiple prestressed cables to be simultaneously arranged and tensioned within a defined channel, avoiding crossover, offset, or uneven stress on the cables during operation. The guide dividing columns in the load-bearing frame, in conjunction with the comb-shaped guide cable plate, form several independent guiding channels, orderly separating the longitudinally arranged prestressed cables and guiding them one by one into the tensioning mechanism, achieving a force conversion from longitudinal to lateral, ensuring uniform force transmission from each cable during tensioning. The reaction beam in the tensioning mechanism is movable and positioned within the horizontal guide frame, ensuring accurate force application direction from the jacks to the cables and a smooth tensioning process, thereby improving the overall stability and synchronization of tensioning. The sequential alignment of the guide cable grooves and cable guide holes in the guiding mechanism ensures a smooth cable threading process and facilitates precise tensioning, while the wear-resistant bushing further enhances durability. The side plate fixing holes on the comb-shaped guide cable plate can be used for temporary fixing and positioning of the corrugated plate units, reducing on-site construction space requirements and improving assembly accuracy. The guide channel can also be equipped with formwork space and filled with concrete to form an end concrete anchorage structure, combining temporary tensioning with permanent anchorage to ensure the reliability of the structure during long-term service. Therefore, this invention not only solves the problem of simultaneous tensioning and stability control of multiple prestressed cables, but also optimizes the longitudinal and transverse force conversion and construction adaptability within limited spaces, possessing significant value for engineering application.

[0048] For those skilled in the art, various improvements and modifications can be made without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A pre-stressed corrugated sheet tensioning support, characterized in that, The tensioning support includes a load-bearing frame, a tensioning mechanism and a guiding mechanism disposed within the load-bearing frame; The load-bearing frame includes a base plate, side plates, guide partition columns, and comb-shaped guide cable plates. The base plate is located at the lower end, and two side plates are erected along both ends of the base plate and are vertically fixed to the base plate. A number of guide partition columns are spaced apart between the two side plates. The guide partition columns are fixed to the base plate and extend upward. The comb-shaped guide cable plates are horizontally fixed to the upper ends of the side plates and the guide partition columns. A number of independent guide channels are formed between adjacent guide partition columns. The tensioning mechanism includes a tensioning device mounting base, horizontal guide frames, jacks, and a reaction beam; the tensioning device mounting base is fixed to one side of the load-bearing frame, the two horizontal guide frames are fixed at both ends of the tensioning device mounting base and perpendicular to the load-bearing frame, the reaction beam is movably disposed between the two horizontal guide frames, and the bottom end and piston end of the jack are fixed to the tensioning device mounting base and the reaction beam, respectively. The guiding mechanism includes a guide cable groove, a guide horizontal shaft, and a cable threading guide hole; multiple guide cable grooves are evenly opened on the upper edge of the comb-shaped guide cable plate; the guide horizontal shaft is horizontally arranged in the lower part of the load-bearing frame, passes through several guide channels, and is connected to the two side upright plates; multiple cable threading guide holes are opened on the tensioning device mounting base, and the guide cable groove, guide channel, and cable threading guide hole are aligned in sequence.

2. The prestressed corrugated slab tensioning support according to claim 1, characterized in that, The reaction beam is provided with several cable-threading fixing holes along its transverse direction, and each cable-threading fixing hole corresponds to a cable-threading guide hole.

3. The prestressed corrugated slab tensioning support of claim 1, wherein, The guide cable groove on the comb-shaped guide cable plate has an opening, and its cross-section is U-shaped.

4. The prestressed corrugated slab tensioning support of claim 1, wherein, The guide shaft is a detachable round shaft, and both ends of the guide shaft are connected to the side plate through shaft seats.

5. The prestressed corrugated panel tensioning support of claim 1, wherein, Several parallel triangular stiffening plates are provided at the connection between the side plate and the tensioning device mounting base.

6. The prestressed corrugated panel tensioning support of claim 1, wherein, The tensioning mechanism includes at least two jacks, which are located at both ends of the tensioning device mounting base.

7. The prestressed corrugated panel tensioning support of claim 1, wherein, Replaceable wear-resistant bushings are provided in the cable guide groove and cable threading guide hole.

8. The prestressed corrugated panel tensioning support of claim 1, wherein, The comb-shaped guide cable plate is provided with a number of side plate fixing holes, which are arranged at intervals along the lateral direction, and the number of side plate fixing holes and the number of guide cable grooves are staggered in sequence.

9. The prestressed corrugated panel tensioning support of claim 1, wherein, The inner side of the horizontal guide frame is provided with a rail groove, and the two ends of the reaction beam are provided with sliders, which are embedded in the rail groove.

10. The prestressed corrugated panel tensioning support of claim 1, wherein, A formwork space for forming concrete anchorage is provided in the guide channel, and formwork can be arranged and concrete poured in the formwork space.

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