Portable beam manufacturing prestress tensioning operation platform

Abstract

The utility model relates to a beam-making prestress tensioning operation device, in particular to a portable beam-making prestress tensioning operation platform which comprises a tensioning operation platform frame, a transverse moving rail is welded to each of a front frame and a rear frame of the top of the tensioning operation platform frame, transverse moving wheels are arranged on the transverse moving rails in a sliding mode, and transverse moving wheel transverse shafts are arranged on the transverse moving wheels in a penetrating mode. Longitudinal beam supporting legs are welded to the two ends of the transverse moving wheel transverse shaft, a transverse moving longitudinal beam is welded to the tops of the longitudinal beam supporting legs together, a longitudinal moving rail is welded to the transverse moving longitudinal beam, a longitudinal moving wheel is slidably arranged in the longitudinal moving rail, and a longitudinal moving wheel transverse shaft penetrates through the center of the longitudinal moving wheel. The bottom of the I-shaped steel connecting piece is connected with an electric hoist; the lower end of the electric hoist is connected with a jack; the jack can conveniently move up and down, back and forth and left and right through the operation platform, the difficulty of moving and installing the jack by workers is reduced, the construction period and the construction safety are guaranteed, the jack can be always perpendicular to the tensioning direction in the moving process, and the construction quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to a prestressed tensioning operation device for beam fabrication, specifically a portable prestressed tensioning operation platform for beam fabrication. Background Technology

[0002] Currently, the most common prestressed precast T-beam construction technique in my country's bridge engineering is "post-tensioning," which plays a crucial role in the operational safety of bridge projects. However, in the construction of post-tensioned T-beams, manual tensioning with jacks often presents challenges such as inconvenience, inaccurate positioning, instability, and displacement during tensioning, preventing the prestressed steel strands from fully functioning. Traditional manual tensioning methods cannot effectively address this issue. Therefore, the industry has set high standards for prestressing tensioning during beam yard construction. Summary of the Invention

[0003] This utility model addresses the technical problems in prestressed beam tensioning construction, such as the difficulty in moving and installing heavy jacks, the high risk of manual installation, the high labor and time consumption, and the low quality of the jacks. It provides a portable beam prestressed tensioning operation platform.

[0004] To address the shortcomings of traditional manual tensioning methods, a portable prestressed beam tensioning platform was designed based on careful research and analysis of the dimensions of 20m, 30m, and 40m prestressed T-beam structures. This platform is low-cost, easy to construct, and reusable. It ensures convenient and accurate positioning of the prestressed steel strands during construction, meeting design requirements. Through the application of this equipment, a set of mature construction experiences was developed, providing significant guidance for subsequent similar projects.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a portable beam prestressing tensioning operation platform, including a tensioning operation platform frame, a horizontally arranged platform plate welded to the lower part of the tensioning operation platform frame, a transverse track welded to the front and rear frames of the top of the tensioning operation platform frame, a transverse wheel slidably arranged on each transverse track, a transverse wheel axle passing through the center of the transverse wheel, longitudinal beam legs welded to both ends of the transverse wheel axle, a transverse longitudinal beam welded to the top of the two longitudinal beam legs, a longitudinal track welded to the transverse longitudinal beam, a longitudinal moving wheel slidably arranged in the longitudinal track, a longitudinal wheel axle passing through the center of the longitudinal moving wheel; I-beam connectors welded to both ends of the longitudinal wheel axle, an electric hoist connected to the bottom of the I-beam connectors, a jack connected to the lower end of the electric hoist, a tensioning machine also installed on the platform plate, and a protective baffle installed on the back of the tensioning operation platform frame.

[0006] Furthermore, the tensioning operation platform frame includes four uprights arranged around the perimeter. Four horizontal bars are welded to the top and bottom of each of the four uprights. The four horizontal bars at the top and bottom are welded to form a rectangular shape, forming an integral frame with the uprights. A platform plate is welded to the lower rectangular frame. Reinforcing horizontal bars are welded 15cm down from the top front and rear horizontal bars of the tensioning operation platform frame. A steel pipe is welded between the two top horizontal bars as a vertical reinforcing bar. A vertical reinforcing bar is also welded to the protective baffle on the back of the tensioning operation platform frame.

[0007] Furthermore, a platform support rod is welded to the bottom of the platform plate, and a toolbox is also provided on the platform plate.

[0008] Furthermore, a U-shaped rib is welded to the top of each of the four uprights, with the annular groove of the U-shaped rib facing downwards.

[0009] Furthermore, the upright is made of I-beam, and both the transverse and longitudinal tracks are made of I-beam.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This invention solves the problems of how to safely and quickly install tensioning jacks and how to fix them during the tensioning of prestressed T-beams, which are difficult due to their heavy weight, high risk of manual installation, and time-consuming and labor-intensive nature. It effectively improves the construction quality of prestressed T-beam tensioning.

[0012] The tensioning jacks are accurately positioned, preventing tension displacement and effectively improving the quality of prestressing tension. The operating platform allows the jacks to be easily moved up, down, forward, backward, left, and right, reducing the difficulty for workers in moving and installing the jacks, ensuring construction schedule and safety. Furthermore, the jacks remain perpendicular to the tensioning direction during movement, guaranteeing construction quality.

[0013] Made of welded I-beams, it has a simple structure, is easy to manufacture and inexpensive, can be reused multiple times, reduces the amount of wood used, and is economical and environmentally friendly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the portable beam prestressing tensioning operation platform of this utility model.

[0015] Figure 2 for Figure 1 The right view.

[0016] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0017] Figure 4 This is a schematic diagram showing the connection between the longitudinal and transverse tracks.

[0018] The markings in the image are as follows:

[0019] 1-Prestressed beam, 2-Prestressed tendon, 3-Upright pole, 4-Horizontal bar, 5-Reinforced horizontal bar, 6-Vertical reinforcing bar, 7-8-Platform plate, 9-Transverse track, 10-Transverse longitudinal beam, 11-Longitudinal track, 12-Longitudinal moving wheel, 13-I-beam connector, 14-Electric hoist, 15-Jack, 16-Tensioning machine, 17-Protective baffle, 18-Toolbox, 19-U-shaped reinforcement, 20-Transverse wheel, 21-Transverse wheel horizontal axle, 22-Longitudinal beam support leg, 23-Longitudinal wheel horizontal axle. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. Example

[0021] like Figure 1-4 As shown, a portable beam prestressing tensioning operation platform includes a tensioning operation platform frame. A horizontally arranged platform plate 8 is welded to the lower part of the tensioning operation platform frame. A transverse track 9 is welded to the front and rear edges of the top of the tensioning operation platform frame, and a transverse wheel 20 is slidably mounted on each transverse track 9. A transverse wheel axle 21 passes through the center of each transverse wheel 20. Longitudinal beam legs 22 are welded to both ends of the transverse wheel axle 21. A transverse longitudinal beam 10 is welded to the top of both longitudinal beam legs 22. A longitudinal track 11 is welded onto the transverse beam 10, and a longitudinal moving wheel 12 is slidably arranged inside the longitudinal track 11. A transverse shaft 23 of the longitudinal moving wheel 12 passes through the center of the longitudinal moving wheel 12. I-beam connecting parts 13 are welded to both ends of the transverse shaft 23 of the longitudinal moving wheel, and an electric hoist 14 is connected to the bottom of the I-beam connecting parts 13. A jack 15 is connected to the lower end of the electric hoist 14. A tensioning machine 16 is also installed on the platform plate 8, and a protective baffle 17 is installed on the back of the tensioning operation platform frame.

[0022] Furthermore, the tensioning operation platform frame includes four uprights 3 arranged around the perimeter. Four horizontal bars 4 are welded to the top and bottom of the four uprights 3 respectively. The four horizontal bars 4 at the top and bottom are welded to form a rectangular shape, forming an integral frame with the uprights 3. A platform plate 8 is welded to the lower rectangular frame. Reinforcing horizontal bars 5 are welded 15cm down from the top front and rear horizontal bars 4 of the tensioning operation platform frame. A steel pipe is welded between the two top horizontal bars 4 as a vertical reinforcing bar 6. A vertical reinforcing bar 6 is also welded to the protective baffle 17 on the back of the tensioning operation platform frame.

[0023] Furthermore, a platform support rod 7 is welded to the bottom of the platform plate 8, and a toolbox 18 is also provided on the platform plate 8.

[0024] Furthermore, a U-shaped rib 19 is welded to the top of each of the four uprights, with the annular groove of the U-shaped rib 19 facing downwards.

[0025] Furthermore, the upright 3 is made of I-beam, and both the transverse track 9 and the longitudinal track 11 are made of I-beam.

[0026] The manufacturing steps for a portable beam prestressing tensioning operation platform are as follows:

[0027] (1) Design of portable beam prestressing tensioning operation platform frame: Two platform frames are set up, respectively placed at both ends of the prestressed T-beam tensioning. The platform frame is welded from I-beams into a hollow frame. The platform frame dimensions are set according to the outer width of the prestressed beam steel strands. The transverse width of the frame is 1.5m extended from the outer edge of the prestressing tendons. The longitudinal length of the frame is close to the front working anchor on the inner side and 2m longer than the exposed steel strands on the outer side. The height is 0.2m higher than the beam. Four-wheeled transverse longitudinal beam, longitudinal moving wheels, and hand-operated hoist are set on the top of the frame. The left and right and front and back positions of the jacks are adjusted by moving the four-wheeled transverse longitudinal beam and the longitudinal moving wheels. The up and down positions of the jacks are adjusted by controlling the electric hoist. Safety baffles are set on the outer side of the frame perpendicular to the steel strands.

[0028] (2) Fabrication of the prestressed tendon tensioning operation platform frame: The platform frame is welded from I-beams. Four I-beams are set around the frame. Four horizontal bars are set at the bottom and top and connected to the vertical bars to form a whole. The bottom horizontal bar is slightly higher than the precast beam platform. Upward I-beams are welded to the front and rear horizontal bars at the top of the frame as the transverse track of the four-wheel transverse longitudinal beam. The four-wheel transverse longitudinal beam is installed on the I-beam. The longitudinal track is welded on the four-wheel transverse longitudinal beam. The longitudinal moving wheel is installed on the longitudinal moving wheel. The electric hoist is suspended on the longitudinal moving wheel. The jack is suspended on the electric hoist. Wooden boards are laid at the bottom horizontal bar position as the construction operation platform. Steel plates are welded to the outer side of the frame that is perpendicular to the steel strand as safety baffles for tensioning.

[0029] (3) Setting of horizontal reinforcing bars: Weld a steel pipe 15cm down from the position of the front and rear horizontal bars at the top of the frame as a horizontal reinforcing bar.

[0030] (4) Setting up the transverse track: Weld an upward-facing I-beam to each of the horizontal bars at the top of the frame, and weld steel plates to the ends of the I-beams to serve as the track for the longitudinal beam to move.

[0031] (5) Setting up an electric hoist: The electric hoist is suspended on the I-beam of the longitudinal moving wheel, and a jack is suspended on the electric hoist.

[0032] (6) Setting up the operating platform: Four platform support steel pipes are welded horizontally and evenly on the inner side of the bottom horizontal bar, and wooden boards are installed on the bottom horizontal bar to serve as the operating platform for placing tensioning machinery and for construction personnel to perform tensioning operations.

[0033] (7) Setting of vertical reinforcing bars: A steel pipe is vertically welded in the middle of the outer side of the frame perpendicular to the steel strand as a vertical reinforcing bar, and a steel pipe is vertically welded in the middle of the two horizontal bars at the top as a vertical reinforcing bar.

[0034] (8) Setting up tension protection plate: Weld a steel plate on the outer side uprights and vertical reinforcing bars of the frame perpendicular to the steel strands to serve as a safety protection plate for tensioning.

[0035] (9) Setting up a tensioning toolbox: Make a box out of wood and place it on the side of the bottom operating platform to store the tensioning tools.

[0036] (10) Setting up the platform frame hoisting ring: Weld a U-shaped steel bar made of round steel to the top of each of the four uprights of the platform frame. The groove of the U-shaped steel bar is welded downwards for use in hoisting the platform frame.

[0037] The operation and use methods for the portable beam prestressing tensioning platform are as follows:

[0038] After the prestressed precast T-beams have been poured to reach 85% of their design strength and have been aged for at least 7 days, and the concrete strength report confirms that the requirements have been met, the prestressing precast T-beam tensioning construction begins. Two prepared operating platforms are hoisted to the tensioning ends of the prestressed T-beams using a gantry crane. Electric hoists 14 are then installed on top of the platforms. The position of electric hoists 14 is adjusted to the end of the prestressed strand 2 to be tensioned. The lower hook of the electric hoist 14 is used to hook the tensioning jack 15. The electric hoist 14 is used to lift the jack to the end of the steel strand to be tensioned. The longitudinal moving wheel 12 is moved longitudinally to the end of the steel strand. After installing the tool anchor and clamps, prestressing tensioning is performed. After tensioning one strand, the jack 15 is removed, and the jack 15 is moved to the next strand for tensioning. The above steps are repeated until the prestressed strand 2 is tensioned. This utility model provides a prestressed beam prestressed tendon tensioning operation platform, offering an operating platform for tensioning workers; providing flexible and stable fixing points for tensioning jacks; enabling convenient and quick movement of prestressed tensioning jacks; accelerating the installation time of tensioning jacks, improving construction efficiency, reducing construction costs; and enhancing the safety of tensioning operations.

[0039] The operating platform allows the jacks to be moved easily up, down, forward, backward, left, and right, reducing the difficulty for workers to move and install the jacks, ensuring the construction period and safety, and ensuring that the jacks remain perpendicular to the tensioning direction during the movement process, thus guaranteeing the construction quality.

[0040] Benefit Analysis: Beam Yard #1 has completed the tensioning of 104 precast T-beams (20m), 150 precast T-beams (30m), and 40 precast T-beams (40m). This construction method saves materials, improves efficiency, provides an operating platform for tensioning personnel, offers flexible and stable fixing points for tensioning jacks, facilitates the movement of prestressed tensioning jacks, accelerates jack installation time, improves construction efficiency, reduces construction costs, and enhances the safety of tensioning operations. It has achieved the design intent, yielded significant social benefits, and possesses excellent application value.

[0041] Taking the completed tensioning at beam yard #1 as an example, we analyze the cost of using a prestressed tendon tensioning operation platform versus manual construction alone: ​​the prestressed tendon tensioning operation platform costs 7,500 yuan more in materials than manual construction alone, saving 110,250 yuan in labor costs. The residual value of the prestressed tendon tensioning operation platform is 3,750 yuan, resulting in a total saving of 99,000 yuan.

Claims

1. A portable beam prestressing tensioning operation platform, characterized in that, The system includes a tensioning operation platform frame, with a horizontally arranged platform plate (8) welded to the lower part of the tensioning operation platform frame. A transverse track (9) is welded to the front and rear edges of the top of the tensioning operation platform frame, and a transverse wheel (20) is slidably arranged on each transverse track (9). A transverse wheel axle (21) is inserted through the center of each transverse wheel (20). Longitudinal beam legs (22) are welded to both ends of the transverse wheel axle (21). A transverse longitudinal beam (10) is welded to the top of the two longitudinal beam legs (22). A longitudinal beam (10) is welded to the top of the transverse longitudinal beam (10). The longitudinal track (11) is slidably provided with a longitudinal moving wheel (12), and a longitudinal moving wheel cross shaft (23) is passed through the center of the longitudinal moving wheel (12); I-beam connecting parts (13) are welded to both ends of the longitudinal moving wheel cross shaft (23), and an electric hoist (14) is connected to the bottom of the I-beam connecting part (13). A jack (15) is connected to the lower end of the electric hoist (14). A tensioning machine (16) is also installed on the platform plate (8), and a protective baffle (17) is installed on the back of the tensioning operation platform frame.

2. The portable beam prestressing tensioning operation platform according to claim 1, characterized in that, The tensioning operation platform frame includes four uprights (3) arranged around the perimeter. Four horizontal bars (4) are welded to the top and bottom of the four uprights (3). The four horizontal bars (4) at the top and bottom are welded to form a rectangular shape, forming an integral frame with the uprights (3). A platform plate (8) is welded to the rectangular frame at the bottom. A reinforcing horizontal bar (5) is welded 15cm down from the top front and rear horizontal bars (4) of the tensioning operation platform frame. A steel pipe is welded between the two top horizontal bars (4) as a vertical reinforcing bar (6). A vertical reinforcing bar (6) is also welded to the protective baffle (17) on the back of the tensioning operation platform frame.

3. The portable beam prestressing tensioning operation platform according to claim 1, characterized in that, The bottom of the platform plate (8) is welded with a platform support rod (7), and a toolbox (18) is also provided on the platform plate (8).

4. The portable beam prestressing tensioning operation platform according to claim 2, characterized in that, Each of the four uprights (3) has a U-shaped rib (19) welded to its top, with the annular groove of the U-shaped rib (19) facing downwards.

5. The portable beam prestressing tensioning operation platform according to claim 2, characterized in that, The upright (3) is made of I-beam, and the transverse track (9) and longitudinal track (11) are both made of I-beam.

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