Temporary positioning device

Abstract

The utility model provides a kind of temporary spacing device, it is related to bridge installation technical field, it is applied to between two adjacent prefabricated bridge deck, the temporary spacing device includes at least two screw rods, force beam and at least two jacking mechanisms, one end of the screw rod is threadedly connected with welded nut, the welded nut is configured as and is welded with shear pin between two the prefabricated bridge deck, and the connecting place of the screw rod with the welded nut is equipped with closed assembly, the other end of the screw rod is connected with the force beam, one end of the jacking mechanism is configured to be located on the prefabricated bridge deck upper surface, the other end of the jacking mechanism is connected with the lower surface of the force beam, and the jacking mechanism is used to lift when limiting action.The utility model solves the problem that temporary spacing device exists difficulty when demolishing in later period.

Description

Technical Field

[0001] This utility model relates to the field of bridge installation technology, and more specifically, to a temporary limiting device. Background Technology

[0002] During the installation of precast bridge deck panels of steel-concrete composite beams, temporary limiting devices can temporarily fix the precast bridge deck panels that have been installed in place, restricting their displacement or swaying in the transverse and vertical directions, ensuring that the panels are always in the designed installation position, providing a stable structural foundation for subsequent construction (such as welding of extended steel bars and pouring of wet joints), and avoiding construction deviations caused by panel displacement.

[0003] In related technologies, temporary limiting devices typically involve directly welding the clamp (screw) to the shear studs under the precast bridge deck. Furthermore, the clamp (screw) is easily stuck to the concrete, making it difficult to remove the temporary limiting device later. Utility Model Content

[0004] The problem solved by this invention is the difficulty in removing the temporary limiting device later.

[0005] To address the aforementioned problems, this utility model provides a temporary limiting device applied between two adjacent precast bridge decks. The temporary limiting device includes at least two screws, a load-bearing beam, and at least two lifting mechanisms. One end of each screw is threaded with a welding nut, which is configured to be welded to a shear stud between the two precast bridge decks. A sealing component is fitted at the connection between the screw and the welding nut. The other end of each screw is connected to the load-bearing beam. One end of each lifting mechanism is positioned on the upper surface of the precast bridge deck, and the other end abuts against the lower surface of the load-bearing beam. The lifting mechanism is used to perform a lifting action during limiting.

[0006] Optionally, the sealing assembly includes a sealing tube and epoxy resin, the sealing tube being sleeved at the connection between the screw and the welding nut, and the epoxy resin filling the space between the sealing tube and the screw.

[0007] Optionally, the other end of the screw is threaded with a connecting nut, and the load-bearing beam has a through hole adapted to the other end of the screw. The other end of the screw passes through the through hole and abuts against the upper surface of the load-bearing beam through the connecting nut.

[0008] Optionally, a rubber washer is provided between the upper surface of the load-bearing beam and the connecting nut.

[0009] Optionally, a gasket is also provided between the upper surface of the load-bearing beam and the rubber gasket.

[0010] Optionally, a rubber pad is provided between one end of the lifting mechanism and the precast bridge panel.

[0011] Optionally, the temporary limiting device further includes a high-strength, low-relaxation steel strand, which is configured to be disposed within the transverse prestressed tendon ducts of the precast bridge deck.

[0012] Optionally, the lifting mechanism includes a constant pressure cylinder and / or a jack.

[0013] Optionally, the load-bearing beam is a hollow cuboid structure.

[0014] Optionally, at least two of the lifting mechanisms are configured to be evenly distributed on two adjacent precast bridge panels.

[0015] The beneficial effects of the temporary limiting device of this utility model are: By welding the weld nut at one end of the screw to the shear stud and threading the screw and weld nut together, a stable assembly of the screw and shear stud can be achieved, preventing loosening and providing a reliable installation support foundation for the entire device. This ensures the stable landing of the subsequent limit function, and the threaded connection facilitates the later separation and removal of the screw and shear stud. The enclosed component at the connection between the screw and weld nut effectively isolates the screw from impurities in the surrounding construction environment (such as construction debris and mortar), preventing impurities from entering the connection gap between the screw and weld nut or adhering to the screw surface. This avoids impurities causing jamming and affecting subsequent assembly and disassembly operations or compromising the fit accuracy between the screw and other components. The other end of the screw is connected to the load... The lifting mechanism is connected to the crossbeam, with one end positioned on the upper surface of the precast bridge deck and the other end abutting against the lower surface of the crossbeam. This structure allows the lifting mechanism to perform a lifting action during the limiting phase. The force can be evenly transmitted to at least two screws through the crossbeam. With the coordinated force of multiple screws, the imbalance of force on a single screw can be avoided, which could cause the precast bridge deck to shift. This achieves precise and stable limiting of adjacent precast bridge decks. Furthermore, when it is necessary to adjust the limiting state or remove the device later, the force on the screws can be adjusted or the screws can be removed from the limiting state simply by moving the crossbeam through the lifting mechanism. This makes the operation more convenient and further ensures the reliability and flexibility of the limiting function during construction. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the temporary limiting device provided in the embodiment of this utility model; Figure 2 One of the schematic diagrams illustrating the application environment of the temporary limiting device provided in this embodiment of the utility model; Figure 3 A second schematic diagram illustrating the application environment of the temporary limiting device provided in this embodiment of the utility model; Figure 4 One of the limiting diagrams of the temporary limiting device provided in the embodiments of this utility model; Figure 5 The second schematic diagram of the temporary limiting device provided in the embodiment of this utility model; Figure 6 The third schematic diagram of the temporary limiting device provided in the embodiment of this utility model; Figure 7 One of the schematic diagrams for dismantling the temporary limiting device provided in the embodiment of this utility model; Figure 8 The second schematic diagram illustrating the removal of the temporary limiting device provided in this embodiment of the utility model; Figure 9 The third schematic diagram of the removal of the temporary limiting device provided in the embodiment of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Precast bridge deck; 2. Temporary limiting device; 21. Screw; 22. Load-bearing crossbeam; 23. Lifting mechanism; 24. Welded nut; 25. Enclosure assembly; 26. Connecting nut; 27. Rubber washer; 28. Gasket; 29. ​​Rubber pad; 3. Shear stud; 4. High-strength, low-relaxation steel strand. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0019] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0020] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] like Figures 1 to 3 As shown in the figure, a temporary limiting device provided by this utility model embodiment is applied between two adjacent precast bridge decks 1. The temporary limiting device 2 includes at least two screws 21, a load-bearing crossbeam 22, and at least two lifting mechanisms 23. One end of the screw 21 is threadedly connected to a welding nut 24. The welding nut 24 is configured to be welded to a shear stud 3 between the two precast bridge decks 1. A sealing component 25 is sleeved at the connection between the screw 21 and the welding nut (24). The other end of the screw 21 is connected to the load-bearing crossbeam 22. One end of the lifting mechanism 23 is configured to be located on the upper surface of the precast bridge deck 1. The other end of the lifting mechanism 23 abuts against the lower surface of the load-bearing crossbeam 22. The lifting mechanism 23 is used to perform a lifting action when limiting.

[0022] Specifically, multiple temporary limiting devices 2 can be installed between two adjacent precast bridge decks 1. Each temporary limiting device 2 includes at least two screws 21, a load-bearing crossbeam 22, and at least two lifting mechanisms 23. The number of screws 21 can be set according to actual conditions to ensure uniform force distribution on the limiting device. The screws 21 can have a diameter of 20mm, a length of 420mm, and a material number of 45#. In this embodiment, each temporary limiting device 2 has three screws 21, which can better achieve uniform force distribution. One end of the screw 21 is threaded with a welding nut 24. The welding nut 24 is configured to be welded to a shear stud 3 between the two precast bridge decks 1. The end of the shear stud 3 away from the welding nut 24 is connected to a steel beam, and the steel beam abuts against the lower surface of the two adjacent precast bridge decks 1. One end of the screw 21 is fitted with a sealing component 25 to prevent the concrete mortar from sticking to the screw 21 during the pouring of wet joint concrete, thus solving the problem of difficult removal of the screw 21 later. The other end of the screw 21 abuts against the upper surface of the load-bearing beam 22. One load-bearing beam 22 can be provided, and the screw 21 of each temporary limiting device 2 abuts against the upper surface of the load-bearing beam 22. One end of the lifting mechanism 23 is configured to be located on the upper surface of the precast bridge deck 1, and the other end of the lifting mechanism 23 abuts against the lower surface of the load-bearing beam 22. The lifting mechanism 23 is used to perform a lifting action during limiting, thereby limiting the two precast bridge decks 1 by transmitting the driving force generated by the lifting action through the load-bearing beam 22 and the screw 21. For example, Figure 4 As shown, after the temporary limit device 2 is installed, the lifting mechanism 23 begins to lift and locks itself after reaching the target position, maintaining the lifting action; as Figure 5As shown, after the lifting mechanism 23 is locked, transverse prestressed tendons are installed through the steel strands 4 and tensioned; as Figure 6 As shown, after installing the transverse prestressed tendons, pour the wet joint and cure it to the design strength; as Figure 7 As shown, after pouring and curing to the design strength, the temporary limiting device 2 is removed, leaving only the sealing component 25 and the welding nut 24; Figure 8 As shown, remove the sealing component 25; as Figure 9 As shown, after removing the sealing component 25, concrete mortar is poured into the cavity of the sealing component 25 and cured to the design strength to complete the assembly and installation of the precast bridge deck 1. Among these steps, Figure 1 This is a front view of the temporary limiting device 2. Figure 2 This is a front view of prefabricated bridge deck 1. Figure 3 This is a top view of the prefabricated bridge deck 1.

[0023] In this embodiment, by welding the welding nut 24 at one end of the screw 21 to the shear nail 3 and threading the screw 21 and the welding nut 24 together, a stable assembly of the screw 21 and the shear nail 3 can be achieved, preventing loosening of the connection and providing a reliable installation support foundation for the entire device. This ensures the stable implementation of the subsequent limiting function, and the threaded connection facilitates the later separation and removal of the screw 21 and the shear nail 3. The sealing component 25 fitted at the connection between the screw 21 and the welding nut effectively isolates the screw 21 from impurities in the surrounding construction environment (such as construction debris, mortar, etc.), preventing impurities from entering the connection gap between the screw 21 and the welding nut 24 or adhering to the surface of the screw 21. This avoids impurities from causing jamming and affecting subsequent disassembly and assembly operations of the screw 21 or damaging the fit accuracy between the screw 21 and other components. The other end is connected to the load-bearing beam 22. One end of the lifting mechanism 23 is located on the upper surface of the precast bridge deck 1, and the other end abuts against the lower surface of the load-bearing beam 22. This structure allows the lifting mechanism 23 to perform a lifting action when it is in the limit position. The force can be evenly transmitted to at least two screws 21 through the load-bearing beam 22. With the help of the coordinated force of multiple screws 21, the precast bridge deck 1 can be prevented from shifting due to the imbalance of force on a single screw 21. This achieves accurate and stable limit position of adjacent precast bridge decks 1. At the same time, when it is necessary to adjust the limit position or remove the device, it is only necessary to drive the load-bearing beam 22 through the action of the lifting mechanism 23 to adjust the force on the screws 21 or to remove the screws 21 from the limit position. The operation is more convenient and further ensures the reliability and adjustment flexibility of the limit position during construction.

[0024] Optionally, the sealing assembly 25 includes a sealing tube and epoxy resin. The sealing tube is sleeved at the connection between the screw 21 and the welding nut 24, and the epoxy resin is filled between the sealing tube and the screw 21.

[0025] Specifically, the sealing component 25 includes a sealing tube and epoxy resin. The sealing tube can be a PVC pipe. The sealing tube is sleeved on one end of the screw 21. Epoxy resin is filled between the sealing tube and the screw 21 to seal the gap between the sealing tube and the screw 21, preventing concrete mortar from flowing into the PVC pipe from the outside during the pouring of wet joint concrete.

[0026] Optionally, such as Figure 1 As shown, the other end of the screw 21 is threaded with a connecting nut 26, and the load-bearing beam 22 has a through hole adapted to the other end of the screw 21. The other end of the screw 21 passes through the through hole and abuts against the upper surface of the load-bearing beam 22 through the connecting nut 26.

[0027] Specifically, the other end of the screw 21 is threaded with a connecting nut 26, and the force-bearing beam 22 has a through hole that matches the other end of the screw 21. The outer diameter of the connecting nut 26 is larger than the diameter of the through hole. The other end of the screw 21 passes through the through hole and abuts against the upper surface of the force-bearing beam 22 through the connecting nut 26, thereby transmitting the driving force.

[0028] Optionally, such as Figure 1 As shown, a rubber washer 27 is also provided between the upper surface of the load-bearing crossbeam 22 and the connecting nut 26.

[0029] Specifically, a rubber washer 27 is provided between the upper surface of the load-bearing crossbeam 22 and the connecting nut 26 to enhance the sealing between components and help prevent impurities from entering or leaking material from gaps during construction.

[0030] Optionally, such as Figure 1 As shown, a gasket 28 is also provided between the upper surface of the load-bearing crossbeam 22 and the rubber gasket 27.

[0031] Specifically, a gasket 28 is provided between the upper surface of the load-bearing beam 22 and the rubber washer 27. The gasket 28 (steel gasket) is used to distribute the pressure when the connecting nut 26 is tightened, protect the load-bearing beam 22 and other contact parts, and avoid damage caused by excessive local stress.

[0032] Optionally, such as Figure 1 As shown, a rubber pad 29 is provided between one end of the lifting mechanism 23 and the precast bridge panel 1.

[0033] Specifically, a rubber pad 29 is provided between one end of the lifting mechanism 23 and the precast bridge panel 1. The rubber pad 29 is used to buffer the lifting pressure of the lifting mechanism 23, protect the surface of the precast bridge panel 1, and improve the contact stability between the two.

[0034] Optionally, such as Figure 2 , Figure 3 and Figure 5As shown, the temporary limiting device also includes a steel strand 4, which is configured to be disposed in the transverse prestressed tendon duct of the precast bridge deck 1.

[0035] Specifically, the temporary limiting device also includes steel strands 4, which are configured to be installed within the transverse prestressing tendon ducts of the precast bridge deck 1 to facilitate the application of transverse prestress. The transverse prestressing steel strand anchors adopt a BM15-3 type group anchor system and supporting products, and are installed and tensioned using a single-strand tensioning process to adjust the prestress. For example, after the lifting mechanism 23 is lifted into place, the lifting mechanism 23 is locked, debris in the transverse prestressing tendon ducts is removed, three steel strands 4 and anchors are installed in sequence, tensioned according to the single-strand prestressing steel strand tensioning process, then the wet joint is poured, grout is injected into the transverse prestressing tendon ducts, and finally the anchors are sealed. For example, the lifting mechanism 23 can be equipped with a pressure sensor to display the lifting force of the lifting mechanism 23 in real time; the lifting mechanism 23 is a constant pressure cylinder, and the constant pressure cylinder is equipped with electrical components such as an electromagnetic relief valve, a relief valve, a hydraulic control check valve, and an electromagnetic reversing valve to ensure that the vertical lifting force of the constant pressure cylinder is constant. When the cylinder pressure changes during the constant pressure process, the equipped electrical components are used to compensate for or release the oil pressure to keep the cylinder pressure constant.

[0036] Optionally, the lifting mechanism 23 includes a constant pressure cylinder and / or a jack.

[0037] Specifically, the lifting mechanism 23 includes a constant pressure cylinder and / or a jack for lifting, and the pressure of the constant pressure cylinder and / or jack can be 10t. The fixed end of the lifting mechanism 23 is set on the precast bridge panel 1, and the telescopic end of the lifting mechanism 23 abuts against the lower surface of the precast bridge panel 1.

[0038] Optionally, the load-bearing beam 22 is a hollow cuboid structure.

[0039] Specifically, the load-bearing crossbeam 22 is a hollow cuboid structure, i.e., a square steel tube, with dimensions of 100*8mm and material number Q355.

[0040] Optionally, such as Figure 1 As shown, at least two of the lifting mechanisms 23 are configured to be evenly distributed on two adjacent precast bridge panels 1.

[0041] Specifically, at least two lifting mechanisms 23 are configured to be evenly distributed on two adjacent precast bridge panels 1, that is, partially set on one precast bridge panel 1 and partially set on the other precast bridge panel 1. The positions of the lifting mechanisms 23 on the two precast bridge panels 1 are preferably symmetrically arranged with respect to the center of the temporary limiting device so as to balance the two adjacent precast bridge panels 1. During lifting, at least two lifting mechanisms 23 lift simultaneously, and the lifting force of each lifting mechanism 23 is 5 to 7t.

[0042] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A temporary limiting device, applied between two adjacent precast bridge decks (1), characterized in that, The temporary limiting device (2) includes at least two screws (21), a load-bearing beam (22), and at least two lifting mechanisms (23). One end of the screw (21) is threaded with a welding nut (24). The welding nut (24) is configured to be welded to a shear stud (3) between two precast bridge panels (1). A sealing component (25) is fitted at the connection between the screw (21) and the welding nut (24). The other end of the screw (21) is connected to the load-bearing beam (22). One end of the lifting mechanism (23) is configured to be located on the upper surface of the precast bridge panel (1). The other end of the lifting mechanism (23) abuts against the lower surface of the load-bearing beam (22). The lifting mechanism (23) is used to perform a lifting action when the device is limited.

2. The temporary limiting device according to claim 1, characterized in that, The sealing component (25) includes a sealing tube and epoxy resin. The sealing tube is sleeved at the connection between the screw (21) and the welding nut (24), and the epoxy resin is filled between the sealing tube and the screw (21).

3. The temporary limiting device according to claim 1, characterized in that, The other end of the screw (21) is threaded with a connecting nut (26). The load-bearing beam (22) has a through hole that is adapted to the other end of the screw (21). The other end of the screw (21) passes through the through hole and abuts against the upper surface of the load-bearing beam (22) through the connecting nut (26).

4. The temporary limiting device according to claim 3, characterized in that, A rubber washer (27) is also provided between the upper surface of the load-bearing crossbeam (22) and the connecting nut (26).

5. The temporary limiting device according to claim 4, characterized in that, A gasket (28) is also provided between the upper surface of the load-bearing beam (22) and the rubber gasket (27).

6. The temporary limiting device according to claim 1, characterized in that, A rubber pad (29) is provided between one end of the lifting mechanism (23) and the precast bridge panel (1).

7. The temporary limiting device according to claim 1, characterized in that, It also includes steel strands (9) which are configured to be disposed in transverse prestressed tendon ducts of the precast bridge deck (1).

8. The temporary limiting device according to claim 1, characterized in that, The lifting mechanism (23) includes a constant pressure cylinder and / or a jack.

9. The temporary limiting device according to claim 1, characterized in that, The load-bearing crossbeam (22) is a hollow cuboid structure.

10. The temporary limiting device according to claim 1, characterized in that, At least two of the lifting mechanisms (23) are configured to be evenly distributed on two adjacent precast bridge panels (1).

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