Temporary support structure for steel box girder

Abstract

This utility model discloses a temporary support structure for steel box girders, relating to the field of bridge construction technology. It includes a bottom support frame, a side traction assembly, a box girder support assembly, and an inclination detection assembly. Multiple sets of main support beams are fixedly connected between the bottom support frame and the support plate, and support trusses are fixed between each pair of main support beams. This temporary support structure for steel box girders, by incorporating a side traction assembly, allows the electric cylinder, controlled by a PLC controller, to extend and push the I-beam downwards along the inside of a fixed cylinder. The wheels then press against the ground, raising the bottom support frame. As the bottom support frame leaves the ground, the support frame can be moved to the area to be supported. Subsequently, the electric cylinder, controlled by the PLC controller, retracts at a uniform speed, causing the bottom support frame to slowly contact the ground. This achieves a movable and reusable function, solving the problems of long construction cycles and poor operational flexibility of the device.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a temporary support structure for steel box girders. Background Technology

[0002] In bridge engineering, especially in the construction of steel box girder bridges, temporary support structures are crucial for ensuring the stability and precise elevation of girder segments during installation, positioning, and welding. Their performance directly impacts construction safety, project quality, and construction efficiency.

[0003] Currently, the temporary support system for steel box girders commonly used in the industry typically consists of steel pipe columns, horizontal steel connecting braces, and a small number of diagonal braces. The typical construction process is as follows: First, steel reinforcement is accurately measured and tied on the ground below the bridge projection or on the completed bridge deck. Then, concrete foundations or piers are poured. After the concrete reaches its design strength, the steel pipe columns are fixed to the piers using pre-embedded steel plates or anchor bolts. Finally, horizontal and diagonal braces are welded or connected on-site using high-strength bolts to form the support frame.

[0004] However, this traditional support method has several significant technical drawbacks and is no longer suitable for the growing demands of modern bridge construction for high efficiency, high precision, and environmental friendliness. Firstly, its construction cycle is long and the procedures are cumbersome, with the pouring and curing of concrete piers occupying a large portion of the critical construction period. From formwork erection, rebar tying, pouring, to waiting for the concrete to reach the required strength, the entire process is time-consuming and labor-intensive, severely restricting the continuous operation of steel box girder installation and becoming one of the key factors limiting construction progress.

[0005] Furthermore, it lacks flexibility, making it impossible to relocate or reuse. Because the support columns are fixed to the concrete foundation as a single unit, this support system is considered a "disposable" or "fixed-point" structure. When bridge construction progresses to the next section or span, the original support system cannot be moved as a whole or quickly dismantled and reused. It usually requires blasting or crushing to remove the concrete foundation, resulting in huge material waste and construction debris, which runs counter to the concept of economical and environmentally friendly construction.

[0006] Now, a novel temporary support structure for steel box girders is proposed to solve the above problems. Utility Model Content

[0007] The purpose of this utility model is to provide a temporary support structure for steel box girders to solve the problems of long construction period and poor flexibility of use mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a temporary support structure for a steel box girder, comprising a bottom bearing frame, a side traction assembly, a box girder support assembly, and an inclination detection assembly. A PLC controller is fixedly installed at the front end of the bottom bearing frame, and a support plate is provided above the bottom bearing frame. Multiple sets of main support beams are fixedly connected between the bottom bearing frame and the support plate, and support trusses are fixed between each pair of main support beams.

[0009] The side traction assembly includes two sets of traction steel frames, which are respectively fixedly connected to the left and right sides of the bottom support frame by bolts. Fixed tubes are welded and fixed to the front and rear ends of the top of the traction steel frame. I-beams are inserted into the bottom of the fixed tubes from bottom to top. A wheel is movably connected to the bottom of the I-beams. An electric cylinder is fixedly installed at the top of the fixed tubes. A rechargeable lithium battery pack is fixedly installed at the top of the traction steel frame.

[0010] As a further technical solution of this utility model, the fixed cylinder and the I-beam are slidably connected, and the I-beam can slide up and down along the inside of the fixed cylinder.

[0011] As a further technical solution of this utility model, the traction steel frame is symmetrically distributed about the vertical center line of the bottom support frame, and the vertical center lines of the I-beam and the wheel coincide.

[0012] As a further technical solution of this utility model, the output end of the electric cylinder is connected to the top of the I-beam, and the PLC controller, the electric cylinder, and the rechargeable lithium battery pack are electrically connected.

[0013] As a further technical solution of this utility model, the box girder support assembly includes a box girder limiting bracket, which is fixedly installed on the top of the support plate. The box girder limiting bracket has countersunk bolt holes inside, and the top of the support plate has multiple sets of positioning bolt holes. Locking bolts are inserted into the countersunk bolt holes.

[0014] As a further technical solution of this utility model, the countersunk bolt holes and positioning bolt holes are in one-to-one correspondence in position and size, the locking bolts penetrate the interior of the countersunk bolt holes and positioning bolt holes, and the vertical center lines of the support plate and the box girder limiting bracket coincide.

[0015] As a further technical solution of this utility model, the tilt detection component includes a sensor housing, which is fixedly installed at the middle position of the bottom end of the support plate. An tilt sensor is fixedly installed at the middle position inside the sensor housing, and an audible and visual alarm is fixedly installed at the top of the PLC controller.

[0016] As a further technical solution of this utility model, the vertical center lines of the bottom support frame, the support plate, and the tilt sensor coincide, and the PLC controller, the tilt sensor, and the audible and visual alarm are electrically connected.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the temporary support structure for the steel box girder not only realizes the function of being movable and reusable, but also realizes the function of precise support and anti-displacement, and also realizes the function of tilt feedback;

[0018] (1) By setting up a side traction component, when in use, the bottom support frame, main support beam, support truss and support plate constitute the main body of the support structure. The ground of the area to be supported is leveled and compacted. Then the traction steel frame and traction vehicle are connected. The electric cylinder is extended by the PLC controller to push the I-shaped steel to slide down along the inside of the fixed cylinder. The wheels press against the ground and raise the bottom support frame. As the bottom support frame leaves the ground, the support frame can be moved to the area to be supported. Then the electric cylinder is retracted at a uniform speed by the PLC controller so that the bottom support frame slowly touches the ground. In the later stage, short piles or ground nails can be driven around the bottom support frame for further reinforcement, realizing the function of being movable and reusable.

[0019] (2) By setting up box girder support components, when the main support structure is in place, the box girder limit bracket with the appropriate size and specifications of the box girder is fixed on the top of the support plate. It is locked by countersunk bolt holes, positioning bolt holes and locking bolts. The box girder limit bracket supports the steel box girder while also limiting it, thus achieving the function of precise support and anti-displacement.

[0020] (3) By setting up a tilt detection component, when in use, the support plate and the box girder support component support the bottom of the box girder. When the overall force is uneven and shifts, the support plate will shift synchronously. The tilt sensor inside the sensor housing monitors the balance state of the support plate in real time. When the tilt angle is greater than the preset threshold, the sound and light alarm will sound an alarm to remind the staff to pay attention in time, make adjustments or evacuate quickly, thus realizing the tilt feedback function. Attached Figure Description

[0021] Figure 1 This is a front view structural diagram of the present utility model;

[0022] Figure 2 This is a front view structural diagram of the electric cylinder of this utility model in its extended state;

[0023] Figure 3 This is a partial enlarged cross-sectional view of the fixed tube of this utility model.

[0024] Figure 4 This is a partial cross-sectional view of the support plate of this utility model from below;

[0025] Figure 5 This is a top view schematic diagram of the box girder limiting bracket of this utility model.

[0026] In the diagram: 1. Bottom support frame; 2. PLC controller; 3. Side traction assembly; 301. Traction steel frame; 302. Fixed tube; 303. I-beam; 304. Wheel; 305. Electric cylinder; 306. Rechargeable lithium battery pack; 4. Main support beam; 5. Support truss; 6. Support plate; 7. Box girder support assembly; 701. Box girder limit bracket; 702. Countersunk bolt hole; 703. Positioning bolt hole; 704. Locking bolt; 8. Tilt detection assembly; 801. Sensor housing; 802. Tilt sensor; 803. Audible and visual alarm. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: Please refer to Figure 1-4 A temporary support structure for a steel box girder includes a bottom support frame 1, a side traction assembly 3, a box girder support assembly 7, and an inclination detection assembly 8. A PLC controller 2 is fixedly installed at the front end of the bottom support frame 1, and a support plate 6 is provided above the bottom support frame 1. Multiple sets of main support beams 4 are fixedly connected between the bottom support frame 1 and the support plate 6, and support trusses 5 are fixed between each pair of main support beams 4.

[0029] Please see Figure 1-4 A temporary support structure for a steel box girder also includes a side traction assembly 3. The side traction assembly 3 includes two sets of traction steel frames 301. The two sets of traction steel frames 301 are respectively fixedly connected to the left and right sides of the bottom bearing frame 1 by bolts. The front and rear ends of the top of the traction steel frame 301 are respectively welded and fixed with a fixed tube 302. The bottom end of the fixed tube 302 is inserted with an I-shaped steel 303 from bottom to top. The bottom end of the I-shaped steel 303 is movably connected with a wheel 304. The top end of the fixed tube 302 is fixedly installed with an electric cylinder 305. The top of the traction steel frame 301 is fixedly installed with a rechargeable lithium battery pack 306.

[0030] The fixed cylinder 302 and the I-beam 303 are slidably connected. The I-beam 303 can slide up and down along the inside of the fixed cylinder 302. The traction steel frame 301 is symmetrically distributed about the vertical center line of the bottom support frame 1. The vertical center lines of the I-beam 303 and the wheel 304 coincide. The output end of the electric cylinder 305 is connected to the top of the I-beam 303. The PLC controller 2, the electric cylinder 305, and the rechargeable lithium battery pack 306 are electrically connected, which facilitates quick positioning to form a support and can be recycled.

[0031] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the traction steel frame 301 is connected to the traction vehicle. The electric cylinder 305 is extended and pushed by the PLC controller 2 to slide the I-shaped steel 303 down along the inside of the fixed cylinder 302. The wheel 304 presses against the ground and raises the bottom support frame 1. As the bottom support frame 1 leaves the ground, the traction support frame can be moved to the area to be supported. Then, the electric cylinder 305 is retracted at a constant speed by the PLC controller 2, so that the bottom support frame 1 slowly touches the ground. Short piles or ground nails can be driven into the area around the bottom support frame 1 for further reinforcement.

[0032] The box girder support assembly 7 includes a box girder limiting bracket 701, which is fixedly installed on the top of the support plate 6. The box girder limiting bracket 701 has countersunk bolt holes 702 inside, and the top of the support plate 6 has multiple sets of positioning bolt holes 703. Locking bolts 704 are inserted into the countersunk bolt holes 702. The countersunk bolt holes 702 and the positioning bolt holes 703 are in one-to-one correspondence in position and size. The locking bolts 704 pass through the interior of the countersunk bolt holes 702 and the positioning bolt holes 703. The vertical center lines of the support plate 6 and the box girder limiting bracket 701 coincide, which facilitates precise support and limiting.

[0033] Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, the box girder limiting bracket 701, which is selected and matched with the box girder size and specifications, is fixed on the top of the support plate 6. It is locked by countersunk bolt holes 702, positioning bolt holes 703, and locking bolts 704. The box girder limiting bracket 701 supports the steel box girder while also limiting its movement.

[0034] The tilt detection assembly 8 includes a sensor housing 801, which is fixedly installed at the middle position of the bottom end of the support plate 6. An tilt sensor 802 is fixedly installed at the middle position inside the sensor housing 801. An audible and visual alarm 803 is fixedly installed at the top of the PLC controller 2. The vertical center lines of the bottom support frame 1, the support plate 6, and the tilt sensor 802 coincide. The PLC controller 2, the tilt sensor 802, and the audible and visual alarm 803 are electrically connected. An alarm is issued by detecting the tilt angle, which can avoid safety accidents.

[0035] Specifically, such as Figure 1 and Figure 4 As shown, the tilt sensor 802 inside the sensor housing 801 monitors the balance of the support plate 6 in real time. When the tilt angle is greater than the preset threshold, the audible and visual alarm 803 sounds an alarm to remind the staff to pay attention in time and make adjustments or evacuate quickly.

[0036] Working principle: When using this utility model, firstly, the bottom support frame 1, main support beam 4, support truss 5 and support plate 6 constitute the main body of the support structure. The ground of the area to be supported is leveled and compacted. Then, the traction steel frame 301 is connected to the traction vehicle. The electric cylinder 305 is extended and pushed by the PLC controller 2 to slide down along the inside of the fixed cylinder 302. The wheels 304 press against the ground and raise the bottom support frame 1. As the bottom support frame 1 leaves the ground, the traction support frame can be moved to the area to be supported. Then, the electric cylinder 305 is retracted at a uniform speed by the PLC controller 2, so that the bottom support frame 1 slowly fits against the ground. In the later stage, short piles or ground nails can be driven into the perimeter of the bottom support frame 1 for further reinforcement. With the main support structure in place, the box girder limiting bracket 701, which is selected and matched with the box girder size and specifications, is fixed on the top of the support plate 6. It is locked in place by countersunk bolt holes 702, positioning bolt holes 703, and locking bolts 704. The box girder limiting bracket 701 provides support to the steel box girder while also limiting its movement. The support plate 6 and the box girder support assembly 7 rest on the bottom of the box girder. When the overall force is uneven and shifts, the support plate 6 will shift synchronously. The tilt sensor 802 inside the sensor housing 801 monitors the balance of the support plate 6 in real time. When the tilt angle exceeds a preset threshold, the audible and visual alarm 803 sounds an alarm, reminding staff to pay attention and make adjustments or evacuate quickly.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A temporary support structure for a steel box girder, comprising a bottom bearing frame (1), a side traction assembly (3), a box girder support assembly (7), and an inclination detection assembly (8), characterized in that: A PLC controller (2) is fixedly installed at the front end of the bottom support frame (1), and a support plate (6) is provided above the bottom support frame (1). Multiple sets of main support beams (4) are fixedly connected between the bottom support frame (1) and the support plate (6), and support trusses (5) are fixed between each pair of the main support beams (4). The side traction assembly (3) includes two sets of traction steel frames (301). The two sets of traction steel frames (301) are respectively fixedly connected to the left and right sides of the bottom support frame (1) by bolts. The front and rear ends of the top of the traction steel frame (301) are respectively welded and fixed with a fixed tube (302). The bottom end of the fixed tube (302) is inserted with an I-shaped steel (303) from bottom to top. The bottom end of the I-shaped steel (303) is movably connected with a wheel (304). The top end of the fixed tube (302) is fixedly installed with an electric cylinder (305). The top of the traction steel frame (301) is fixedly installed with a rechargeable lithium battery pack (306).

2. The temporary support structure for a steel box girder according to claim 1, characterized in that: The fixed cylinder (302) and the I-beam (303) are slidably connected, and the I-beam (303) can slide up and down along the inside of the fixed cylinder (302).

3. The temporary support structure for a steel box girder according to claim 1, characterized in that: The traction steel frame (301) is symmetrically distributed about the vertical center line of the bottom support frame (1), and the vertical center lines of the I-beam (303) and the wheel (304) coincide.

4. A temporary support structure for a steel box girder according to claim 1, characterized in that: The output end of the electric cylinder (305) is connected to the top of the I-beam (303), and the PLC controller (2), the electric cylinder (305), and the rechargeable lithium battery pack (306) are electrically connected.

5. A temporary support structure for a steel box girder according to claim 1, characterized in that: The box girder support assembly (7) includes a box girder limiting bracket (701), which is fixedly installed on the top of the support plate (6). The box girder limiting bracket (701) has countersunk bolt holes (702) inside. The top of the support plate (6) has multiple sets of positioning bolt holes (703), and locking bolts (704) are inserted into the countersunk bolt holes (702).

6. A temporary support structure for a steel box girder according to claim 5, characterized in that: The countersunk bolt holes (702) and positioning bolt holes (703) are in one-to-one correspondence in position and size. The locking bolt (704) passes through the interior of the countersunk bolt holes (702) and positioning bolt holes (703). The vertical center lines of the support plate (6) and the box girder limiting bracket (701) coincide.

7. A temporary support structure for a steel box girder according to claim 1, characterized in that: The tilt detection assembly (8) includes a sensor housing (801), which is fixedly installed at the middle position of the bottom end of the support plate (6). An tilt sensor (802) is fixedly installed at the middle position inside the sensor housing (801), and an audible and visual alarm (803) is fixedly installed at the top of the PLC controller (2).

8. A temporary support structure for a steel box girder according to claim 7, characterized in that: The vertical center lines of the bottom support frame (1), support plate (6), and tilt sensor (802) coincide, and the PLC controller (2), tilt sensor (802), and audible and visual alarm (803) are electrically connected.

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