Simple support for tensioning transverse bundle

Abstract

The utility model discloses a simple transverse bundle tensioning support which is assembled on a cast-in-place box girder top plate. Comprising a change gear, a weight box, bearing steel and at least two support assemblies. The bearing steel is assembled between the two support assemblies. The weight box is assembled at the bottom of the support assembly. The change gear is assembled at the lower end of the bearing steel and is connected with a steel wire rope which is used for tensioning a transverse bundle arranged on a cast-in-place box beam top plate; the weight box balances torque generated in the tensioning process, the support assembly is prevented from overturning or sliding in the tensioning process, the change gear enables the steel wire rope to tension the transverse bundle more smoothly, frictional resistance in the tensioning process is reduced, the tensioning process is ensured to be conducted stably, and accurate tensioning control over the transverse bundle on the cast-in-place box beam top plate is achieved. And the bearing steel ensures that the simple bracket is not deformed or damaged in the whole tensioning process, so that the safety and the reliability of the tensioning operation are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cast-in-place box girder operation support platforms, and in particular to a simple support for transverse tendon tensioning. Background Technique

[0002] Cast-in-place box girders are mostly used in large continuous bridges. Commonly classified by materials, there are mainly two types: one is prestressed reinforced concrete box girders, and the other is steel box girders. Among them, prestressed reinforced concrete box girders generally adopt the cantilever casting method with hanging baskets for on-site construction section by section, and usually have longitudinal tendons, transverse tendons and vertical tendons. With the development of the construction technology of prestressed reinforced concrete box girders, the transverse tendons are changed from being tensioned in the same section as the longitudinal tendons in the traditional way to tensioning half of the quantity when the longitudinal tendons in the same section are tensioned, and the remaining quantity is completed when the longitudinal tendons in the next section are tensioned. When the traditional longitudinal tendons and transverse tendons are tensioned in the same section, the transverse tendon tensioning can be carried out on the side formwork of the hanging basket on the wing slab of the box girder. However, if the transverse tendons are designed to be tensioned one section later, at this time the hanging basket has moved forward, and the remaining transverse tendon tensioning area is in a suspended state, without a safe and reliable operation platform, there are relatively large safety hazards.

[0003] In the "Movable Platform for Tensioning Transverse Prestressed Steel Tendons on the Top Plate of Cast-in-Place Box Girders" disclosed in the publication number CN215758557U, it includes a main truss, and an upper cross beam and a lower cross beam are sequentially arranged from top to bottom on one side of the main truss; a support is arranged on the top of the upper cross beam, a counterweight hopper is fixedly connected to the inner side of the support, and a bottom plate is hinged to the bottom side of the counterweight hopper; a support frame is arranged at the bottom of the upper cross beam, a traveling wheel is installed at the bottom of the support frame, and a locking mechanism is arranged at the same-side traveling wheel. The above-mentioned movable platform realizes the rapid export of counterweight objects by hinging the bottom plate at the bottom of the counterweight hopper, which is convenient for transportation; however, the mechanical components of the locking mechanism are numerous, resulting in an increase in the failure rate; although the connection method between the counterweight hopper and the bottom plate provides flexibility, additional tools or steps may be required to adjust the counterweight during actual operation, increasing the complexity of the operation. Summary of the Invention

[0004] In order to overcome the defects in the above-mentioned prior art, a simple support for transverse tendon tensioning with a simple structure and convenient operation is provided.

[0005] The technical solution of the utility model is as follows: a simple bracket for tensioning a transverse bundle, which is assembled on the top plate of a cast-in-place box girder; it comprises a hanging wheel, a counterweight box, a load-bearing steel and at least two bracket assemblies; the load-bearing steel is assembled between the two bracket assemblies; the counterweight box is assembled at the bottom of the bracket assembly; the hanging wheel is assembled at the lower end of the load-bearing steel, and a steel wire rope is connected to the hanging wheel, and the steel wire rope is used to tension the transverse bundle provided on the top plate of the cast-in-place box girder; the counterweight box balances the moment generated during the tensioning process to prevent the bracket assembly from overturning or sliding during the tensioning process, and the hanging wheel enables the steel wire rope to tension the transverse bundle more smoothly, reduces the friction resistance during the tensioning process, ensures the smooth progress of the tensioning process, and realizes the precise tensioning control of the transverse bundle on the top plate of the cast-in-place box girder; the load-bearing steel ensures that the simple bracket is not deformed or damaged during the entire tensioning process, thereby ensuring the safety and reliability of the tensioning operation.

[0006] Preferably, the bracket assembly includes two legs, a first connecting steel plate, a second connecting steel plate and a parallel connecting rod; the first connecting steel plate and the second connecting steel plate are arranged in parallel and are used to connect the two legs, and the second connecting steel plate is located below the first connecting steel plate; the parallel connecting rod is horizontally arranged at the lower end of the second connecting steel plate and is used to connect the two legs. The parallel connecting rod is assembled between the bottoms of the two legs to increase the overall stability of the bracket assembly.

[0007] Preferably, the first connecting steel plate and the second connecting steel plate are fixed to the upper and lower ends of the load-bearing steel, thereby increasing the stability of the load-bearing steel, reducing the shaking and distortion of the load-bearing steel when subjected to force, and ensuring the smooth progress of the tensioning process.

[0008] Preferably, the bottom end of the leg is equipped with a brake pulley. The brake pulley allows the bracket assembly to be easily moved on the top plate of the cast-in-place box beam and quickly locked in position when needed. This greatly shortens the time for bracket installation, adjustment and disassembly, and improves construction efficiency.

[0009] Preferably, the counterweight box is mounted on the two bracket assemblies away from the transverse beam. The weight of the counterweight box can generate a certain overturning moment, and placing it at a position away from the transverse beam can reduce the influence of this moment on the bracket stability and improve the stability of the entire simple bracket.

[0010] Preferably, at least three bracket assemblies are provided. Three or more bracket assemblies can provide more stable multi-point support, effectively disperse the load generated during the tensioning process, reduce the situation where a single point is subjected to excessive force, and thus improve the stability of the entire bracket system.

[0011] Preferably, the load-bearing steel is in the shape of an "I" beam, and the hanger wheel is slidably connected to the lower end of the load-bearing steel along the length direction of the load-bearing steel. The I-shaped steel as the load-bearing steel has a high section modulus and load-bearing capacity, and can meet the requirements of the tensioning operation for strength and stiffness. The sliding connection method simplifies the construction process and reduces the construction difficulty and cost. Construction workers can easily adjust the position and number of hanger wheels to adapt to different construction conditions and tensioning requirements.

[0012] Preferably, a limit plate for preventing the hanger wheel from sliding is assembled on the side of the load-bearing steel. The main function of the limit plate is to limit the movement range of the hanger wheel on the load-bearing steel, ensure that the hanger wheel slides within the specified area, and prevent it from deviating from the predetermined position due to external force or operation error.

[0013] Preferably, a braking assembly is provided on the brakeable pulley. The braking assembly includes a rotating shaft and a brake plate; the brake plate is assembled on the brakeable pulley through the rotating shaft. The braking assembly can be quickly activated when needed, and the friction force is generated by the contact between the brake plate and the pulley surface, so as to quickly reduce the rotation speed of the pulley and finally stop it. This instant braking ability is particularly important in emergency situations and can effectively prevent safety accidents caused by pulley out of control.

[0014] Preferably, a tensioning device is assembled on the transverse beam. The connection stability between the steel wire rope and the transverse beam is improved.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] In a simple bracket for transverse beam tensioning, the bracket assembly forms the basic framework of the simple bracket, which has a simple structure and is easy to assemble; it is responsible for supporting the entire tensioning system, is applicable to the cast-in-place box girder top plates of different sizes and shapes, and has strong adaptability and flexibility; the tensioning process is made faster and more efficient through the hanger wheels on the load-bearing steel, reducing the construction time and labor cost; the moment generated during the tensioning process is balanced by the bracket and the counterweight box, preventing the bracket assembly from tipping over or sliding during the tensioning process, and effectively preventing accidents during the construction process.

[0017] Other features and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the utility model with reference to the drawings:

[0019] Figure 1 It is an installation schematic diagram of the bracket assembly of the utility model;

[0020] Figure 2 It is an installation structure schematic diagram of a simple bracket for transverse beam tensioning of the utility model;

[0021] Figure 3 This is a schematic structural diagram of the brakeable pulley of the present utility model;

[0022] The description of the reference numerals in the drawings is as follows:

[0023] The cast-in-place box girder top plate 1, the support assembly 2, the support leg 21, the first connecting steel plate 22, the second connecting steel plate 23, the horizontal connecting rod 24, the hanging wheel 3, the steel wire rope 31, the counterweight box 4, the load-bearing steel 5, the limiting plate 51, the transverse tendon 6, the tensioning device 61, the brakeable pulley 7, the brake assembly 71, the rotating shaft 711, and the brake plate 712. Specific embodiments

[0024] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model, not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0025] In the following description, terms such as "inner", "outer", "upper", "lower", "left", "right", etc. indicating orientation or position relationship are only for the convenience of describing the embodiments 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 cannot be understood as a limitation to the present utility model.

[0026] As Figures 1 to 3 shown, in order to solve the potential safety hazards existing during the transverse tendon tensioning on the side of the cast-in-place box girder top plate 1, a simple transverse tendon tensioning support is assembled on the cast-in-place box girder top plate 1 to provide a reliable tensioning suspension point for the operator, thereby avoiding potential safety hazards.

[0027] Among them, the simple transverse tendon tensioning support includes at least two support assemblies 2, hanging wheels 3, counterweight boxes 4, and load-bearing steels 5; the support assembly 2 is the basic structure of the entire simple support, responsible for supporting and fixing other components; the hanging wheels 3 are assembled on the load-bearing steel 5, and a steel wire rope 31 is connected to the hanging wheels 3. The steel wire rope 31 is used for tensioning the transverse tendon 6 provided on the cast-in-place box girder top plate 1. The hanging wheels 3 are key components connecting the steel wire rope 31 and the load-bearing steel 5, and it can freely slide along the load-bearing steel 5 to adjust the tensioning position and angle; a tensioning device 61 is assembled on the transverse tendon 6 for fixedly connecting the steel wire rope 31. In this embodiment, the tensioning device 61 can adjust the tensioning speed according to the requirements of the tensioning force.

[0028] The side of the load-bearing steel 5 is equipped with a limit plate 51 for preventing the hanging wheel 3 from sliding. When the hanging wheel 3 approaches the limit plate 51, the limit plate 51 will provide a physical barrier to prevent the hanging wheel 3 from continuing to slide, ensuring the safety of the tensioning operation; the load-bearing steel 5 is assembled between the two bracket assemblies 2, and the shape of the load-bearing steel 5 is an "I" shape. The "I"-shaped structure has a high sectional inertia moment and can effectively resist bending deformation, thereby maintaining the stability of the load-bearing steel when subjected to a large load. The hanging wheel 3 is slidably connected to the lower end of the load-bearing steel 5 along the length direction of the load-bearing steel 5; the upper and lower flanges of the "I"-shaped structure of the load-bearing steel 5 can share the vertical load from the hanging wheel and the wire rope, so that the hanging wheel 3 can slide stably on the load-bearing steel 5.

[0029] At least two bracket assemblies 2 can provide more uniform support force, reduce the deflection and deformation of the load-bearing steel 5 in the length direction, and thus enhance the stability of the entire bracket system. The bracket assembly 2 includes two legs 21, a first connecting steel plate 22, a second connecting steel plate 23 and a parallel connecting rod 24; the first connecting steel plate 22 and the second connecting steel plate 23 are arranged in parallel between the two legs 21, and the second connecting steel plate 23 is located below the first connecting steel plate 22. The first connecting steel plate 22 and the second connecting steel plate 23 are used to connect and fix the legs 21 so that they form a stable support structure, providing a certain rigidity and strength to resist the effect of external loads; in this example, the first connecting steel plate 22 is assembled on the top of the two legs 21, which is convenient for operators to weld, bolt, etc. the first connecting steel plate 22, and enhance the connection strength with the legs 21; the parallel connecting rod 24 is assembled between the bottoms of the two legs 21 to enhance the lateral stability of the bracket assembly 2.

[0030] In this embodiment, the first connecting steel plate 22 and the second connecting steel plate 23 are fixed at the upper and lower ends of the load-bearing steel 5, which enhances the overall stability between the bracket assembly 2 and the load-bearing steel 5; the first connecting steel plate 22 and the second connecting steel plate 23 limit the displacement of the load-bearing steel 5 in the vertical and horizontal directions, and prevent shaking caused by vibration, wind load or other external factors. Construction personnel can adjust the positions of the first connecting steel plate 22 and the second connecting steel plate 23 to be suitable for load-bearing steels 5 of different sizes to adapt to different construction conditions and tensioning requirements.

[0031] The counterweight box 4 is used to provide additional weight to increase stability during the tensioning process; the counterweight box 4 is installed between two bracket assemblies 2; in this embodiment, at least three bracket assemblies 2 are provided, and the counterweight box 4 is installed on two bracket assemblies 2 away from the transverse beam 6; placing the counterweight box 4 at a position away from the transverse beam 6 can provide a larger operating space for the tensioning operation. Construction workers can more conveniently approach the transverse beam 6 for tensioning operations without having to worry about collision with the counterweight box 4 or being restricted by it.

[0032] A brakeable pulley 7 is assembled at the bottom end of the outrigger 21; this facilitates the installation, adjustment, and displacement of the support assembly 2 at the construction site, improves construction efficiency, and reduces the waste of human and material resources; a braking assembly 71 is provided on the brakeable pulley 7, and the braking assembly 71 includes a rotating shaft 711 and a brake plate 712; the brake plate 712 is assembled on the brakeable pulley 7 through the rotating shaft 711, and by rotating the brake plate 712 through the rotating shaft 711, it is convenient to switch the brake plate 712 to the braking state, thereby improving the operation efficiency.

[0033] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A simple bracket for transverse beam tensioning, mounted on a top plate (1) of a cast-in-place box beam; characterized in that: The invention comprises a hanging wheel (3), a counterweight box (4), a load-bearing steel (5) and at least two bracket assemblies (2); the load-bearing steel (5) is assembled between the two bracket assemblies (2); the counterweight box (4) is assembled at the bottom of the bracket assembly (2); the hanging wheel (3) is assembled at the lower end of the load-bearing steel (5), and the hanging wheel (3) is connected to a steel wire rope (31), and the steel wire rope (31) is used to tension a transverse bundle (6) provided on the top plate (1) of the cast-in-place box beam.

2. A simple bracket for lateral beam tensioning according to claim 1, characterized in that: The support assembly (2) comprises two supporting legs (21), a first connecting steel plate (22), a second connecting steel plate (23) and a parallel connecting rod (24); the first connecting steel plate (22) and the second connecting steel plate (23) are arranged in parallel and are used to connect the two supporting legs (21), and the second connecting steel plate (23) is located below the first connecting steel plate (22); the parallel connecting rod (24) is horizontally arranged at the lower end of the second connecting steel plate (23) and is used to connect the two supporting legs (21).

3. A simple bracket for lateral beam tensioning according to claim 2, characterized in that: The first connecting steel plate (22) and the second connecting steel plate (23) are fixed to the upper and lower ends of the load-bearing steel (5).

4. A simple bracket for lateral beam tensioning according to claim 2, characterized in that: The bottom end of the supporting leg (21) is equipped with a brake pulley (7).

5. The simple bracket for lateral beam tensioning according to claim 1, characterized in that: The counterweight box (4) is mounted on two bracket assemblies (2) away from the transverse beam (6).

6. A simple bracket for lateral beam tensioning according to claim 5, characterized in that: The bracket assemblies (2) are provided with at least three.

7. The simple bracket for lateral beam tensioning according to claim 1, characterized in that: The load-bearing steel (5) is in the shape of an "I" character, and the hanging wheel (3) is slidably connected to the lower end of the load-bearing steel (5) along the length direction of the load-bearing steel (5).

8. The simple bracket for lateral beam tensioning according to claim 1, characterized in that: The side edge of the load-bearing steel (5) is equipped with a limiting plate (51) for preventing the hanging wheel (3) from sliding.

9. The simple bracket for lateral beam tensioning according to claim 4, characterized in that: The brakeable pulley (7) is provided with a brake assembly (71), and the brake assembly (71) comprises a rotating shaft (711) and a brake plate (712); the brake plate (712) is assembled on the brakeable pulley (7) via the rotating shaft (711).

10. The simple bracket for lateral beam tensioning according to claim 1, characterized in that: The transverse bundle (6) is equipped with a tensioning device (61).

Images