Temporary separation and stability control device for pushing large-section double-width steel box girder through tower

Abstract

The utility model provides a kind of large section double-width steel box girder is pushed over tower temporary separation stability control device, belong to bridge engineering technical field, including a plurality of control unit being arranged along the axis direction of steel box girder top, control unit includes controller and 2 containers being symmetrically arranged about steel box girder top axis, container bottom end is welded with steel box girder top, water tank is fixedly connected in container, two water tanks are connected with bidirectional pump by pipeline, each water tank is equipped with anti-shaking mechanism, water level sensor, inclination sensor, the water level sensor, inclination sensor are electrically connected with controller respectively by wire, controller is configured to control bidirectional pump.The utility model is independently controlled each control unit, according to the length of steel box girder section, adjust the quantity of control unit, accurately regulate and control the balance of steel box girder by the automation control of multiple control units, and share the stability information of steel box girder with management personnel, ensure the construction safety when steel box girder passes through bridge tower.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering technology, specifically relating to a temporary separation and stabilization control device for pushing large-section double-span steel box girders over towers. Background Technology

[0002] Bridge launching is an important technology in bridge construction, offering advantages such as rapid construction speed and minimal disruption to traffic. Meanwhile, steel box girder structures are increasingly becoming the preferred choice in this field due to their superior torsional resistance, long service life, low energy consumption, and high construction efficiency.

[0003] When the jacking construction encounters a bridge tower, the double steel box girder needs to be temporarily separated. After the temporary separation, the single girder loses the cooperative constraint of the other girder, and its lateral stiffness and torsional stability decrease significantly, becoming a key risk point in the construction process.

[0004] For large-section steel box girders, both launching efficiency and structural stability must be considered simultaneously. Traditional solutions have significant drawbacks, such as: the ground-support method is greatly limited by terrain conditions and is difficult to adapt to dynamic stress changes during the launching process, failing to provide continuous and stable support; the cable traction method has low control precision, making it difficult to balance lateral offset and torsional deformation during the launching of large-section beams, which can easily lead to excessive deviations in beam alignment and even cause safety hazards such as tilting and instability.

[0005] The current lack of a dedicated stabilization control device for this scenario necessitates frequent pauses and adjustments during construction, impacting not only the construction progress but also further increasing stability risks. Therefore, developing a stabilization control device adapted for the temporary separation and jacking of large-section double-span steel box girders to address the control challenges of lateral displacement and torsion during the jacking process has become an urgent need in the field of bridge construction. Utility Model Content

[0006] To address the problems of existing technologies, this invention discloses a temporary separation and stabilization control device for pushing large-section double-span steel box girders over a tower, with the aim of effectively controlling the risk of instability during the pushing process of large-section steel box girders.

[0007] To achieve the above objectives, the technical solution of this invention is as follows: A temporary separation and stabilization control device for pushing a large-section double-span steel box girder over a tower includes several control units arranged along the axis of the top of the steel box girder. Each control unit includes a controller and two containers symmetrically arranged about the axis of the top of the steel box girder. The bottom of each container is welded to the top of the steel box girder, and a water tank is fixedly connected inside the container. A bidirectional pump is connected between the two water tanks through a pipe. Each water tank is equipped with an anti-sway mechanism, a water level sensor, and a tilt sensor. The water level sensor and the tilt sensor are electrically connected to the controller through wires. The controller is configured to control the bidirectional pump.

[0008] Preferably, the container is a cubic container with an open top, welded from steel bars, and the water tank has a cubic structure, which is snapped into the container.

[0009] Preferably, the anti-sway mechanism includes multiple partitions fixedly connected to the inner wall of the water tank in the horizontal direction. The multiple partitions are evenly distributed in the vertical direction. The adjacent partitions and the bottom partition and the bottom of the water tank form a stable water storage space. A floating block is provided above the top partition. The floating block and the top partition form an adjustable water storage space.

[0010] Preferably, the floating block is also a cubic structure, including an outer metal shell and a floating block body inside the metal shell. A guide rod is fixedly provided vertically at the top of the metal shell. The guide rod passes through the top of the water tank. A limit block is fixedly connected to the top of the guide rod. A guide sleeve is fixedly connected to the lower surface of the top of the water tank. The guide rod passes through the guide sleeve and slides with the guide sleeve. The side wall surfaces of the floating block slide with the respective inner wall surfaces of the water tank.

[0011] Preferably, the water level sensor is a linear displacement sensor located between the top of the floating block and the top of the water tank. The fixed end of the linear displacement sensor is fixedly connected to the top of the water tank, and the telescopic end extends vertically downward and is fixedly connected to the top of the floating block.

[0012] Preferably, the water tank is further provided with a vertically fixed pipe, which passes through the floating block and each layer of partitions. The outer wall of the pipe is slidably connected to the pre-set through hole of the floating block. The pipe is sealed and fixedly connected to the partitions. Branch pipes are provided on the pipe body of the pipe body located in each stable water storage space and the pipe body located in the regulating water storage space. Each branch pipe is equipped with an electromagnetic flow regulating valve. The electromagnetic flow regulating valve is electrically connected to the controller. The bottom end of the pipe body is sealed and fixedly connected to the bottom end of the water tank. The top end of the pipe body passes through the top end of the water tank and is integrally connected to an inclined pipe. A water inlet pipe is provided at the top of the inclined pipe at a position opposite to the top of the pipe body.

[0013] Preferably, it also includes a fixed base, the top of which is connected to a controller via a bracket, and the two ends of the bidirectional pump are respectively connected to the inclined pipe via pipes.

[0014] The beneficial effects of this novel temporary separation and stabilization control device for large-section double-span steel box girder jacking over tower are as follows:

[0015] Each control unit in this new type of system operates independently. The number of control units is adjusted according to the length of the steel box girder segment. Through the automated control of multiple control units, the balance of the steel box girder is precisely regulated, and the stability information of the steel box girder is shared with the management personnel, ensuring the construction safety of the steel box girder when it passes the bridge tower. Attached Figure Description

[0016] Figure 1 This is a side view schematic diagram of the novel structure.

[0017] Figure 2 This is a top view schematic diagram of the structure of this novel invention.

[0018] 1. Steel box girder; 2. Container; 3. Water tank; 4. Two-way pump; 5. Pipeline; 6. Fixing base; 7. Controller; 8. Top of water tank; 9. Guide rod; 10. Guide sleeve; 11. Linear displacement sensor; 12. Inclination sensor; 13. Regulating water storage space; 14. Floating block body; 15. Metal shell; 16. Pipeline 1; 17. Baffle plate; 18. Branch pipe; 19. Inclined pipe. Detailed Implementation

[0019] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0020] The following embodiments can be understood as representing a part of the local structure or method of the present invention, or as a combination of embodiments explaining the broader structure or method of the present invention.

[0021] A temporary separation and stabilization control device for pushing large-section double-span steel box girders over towers, such as Figure 1 , 2As shown, the system includes several control units arranged along the axis of the top of the steel box girder 1. Each control unit includes a controller 7 and two containers 2 symmetrically arranged about the axis of the top of the steel box girder 1. The bottom of each container 2 is welded to the top of the steel box girder 1. A water tank 3 is fixedly connected inside each container 2. A bidirectional pump 4 is connected between the two water tanks 3 via a pipe 5. Each water tank 3 is equipped with an anti-sway mechanism, a water level sensor, and a tilt sensor 12. The water level sensor and tilt sensor 12 are electrically connected to the controller 7 via wires. The controller 7 is configured to control the bidirectional pump 4. The tilt sensor detects the tilt angle of the water tank. Based on the tilt angle feedback, the controller pumps water to the relatively higher side of the top of the steel box girder. By pumping water to the higher side, the steel box girder is adjusted and restored to balance when there is a slight tendency to tilt. The anti-sway mechanism prevents large-scale water swaying within the water tank, as large-scale water swaying may exacerbate the instability of the steel box girder and therefore must be controlled. The water level sensor provides water level information to the controller. If the water level in one tank drops significantly, but the tilt sensor still indicates that the steel box girder is tilted, the controller will send an alarm to the management personnel through the relevant program. The controller can connect to the management personnel's smartphone via a wireless signal transceiver, allowing the management personnel to monitor the stability of the steel box girder at all times.

[0022] In this embodiment, as Figure 1 , 2 As shown, container 2 is a cubic container with an open top, welded from steel bars, and water tank 3 is also cubic in shape, fitting snugly inside container 2. The cubic structure of water tank 3 facilitates fitting into the container and also allows for better control of the water's stability.

[0023] In this embodiment, as Figure 1 , 2 As shown, the anti-sway mechanism includes multiple partitions 17 fixedly connected to the inner wall of the water tank 3 in the horizontal direction. The partitions 17 are evenly distributed vertically. The adjacent partitions 17 and the bottom partition 17 and the bottom of the water tank 3 form a stable water storage space. In this space, the water is stably constrained, which can prevent its own swaying from affecting the stability of the steel box girder. A floating block is provided above the top partition 17, and the floating block and the top partition 17 form an adjusting water storage space 13. The floating block has a certain effect in preventing large water swaying. By floating up and down, the size of the adjusting water storage space can be adjusted. The adjusting water storage space is used to adjust the steel box girder when it tilts slightly. The water volume in the adjusting water storage space in the two side water tanks is adjusted by a bidirectional pump to make the steel box girder quickly restore balance. The floating block is a certain distance from the top of the water tank. When necessary, the water in the stable water storage space can be pumped into the water tank on the other side.

[0024] In this embodiment, as Figure 1 , 2 As shown, the floating block is also a cubic structure, including an outer metal shell 15 and a floating block body 14 (usually made of foam material) inside the metal shell 15. A guide rod 9 is fixedly mounted vertically at the top of the metal shell 15, penetrating the top of the water tank 3. A limit block is fixedly connected to the top of the guide rod 9. A guide sleeve 10 is fixedly connected to the lower surface of the top of the water tank 3, through which the guide rod 9 slides. The sidewall surfaces of the floating block slide against the inner walls of the water tank 3. On one hand, the cubic floating block can float up and down within the water tank without twisting, thus limiting the sloshing of water within the regulating water storage space to a certain extent. On the other hand, the radial movement constraint of the guide rod by the guide sleeve indirectly limits the floating block to only moving up and down along the guide sleeve, thus limiting the sloshing of water in the regulating water storage space to a certain extent. Combining these two embodiments, the interference of water sloshing inside the water tank on the stability of the steel box girder can be completely avoided.

[0025] In this embodiment, as Figure 1 , 2 As shown, the water level sensor is a linear displacement sensor 11 located between the top of the floating block and the top of the water tank 3. The fixed end of the linear displacement sensor 11 is fixedly connected to the top of the water tank 3, and the telescopic end extends vertically downward and is fixedly connected to the top of the floating block. The up-and-down movement of the floating block will cause the telescopic end to move up and down, thereby allowing the linear displacement sensor to measure and adjust the water level in the water storage space in real time.

[0026] In this embodiment, as Figure 1 , 2As shown, a pipe 16 is also fixed vertically inside the water tank 3. The pipe 16 passes through the floating block and each layer of partition 17. The outer wall of the pipe 16 is slidably connected to the pre-set through hole of the floating block, so as not to obstruct the floating block from moving up and down. The pipe 16 is sealed and fixedly connected to the partition 17. Branch pipes 18 are respectively provided on the pipe body of the pipe 16 located in each stable water storage space and the pipe body located in the regulating water storage space. Each branch pipe 18 is equipped with an electromagnetic flow regulating valve (not marked in the figure). The electromagnetic flow regulating valve is electrically connected to the controller 7. The bottom end of the pipe 16 is sealed and fixedly connected to the bottom end of the water tank 3. The top end of the pipe 16 passes through the top end of the water tank 3 and is integrally connected to an inclined pipe 19. An inlet pipe (not marked in the figure) is provided at the top of the inclined pipe 19 at a position opposite to the pipe 16. When using this new type of equipment, first weld each container to the top of the steel box girder, place it in the water tank, and add water through the inlet pipe. Simultaneously, open each electromagnetic flow regulating valve. Once the lower stable water storage space is full, water enters the regulating water storage space. When a certain water level is reached, the controller alarms and stops adding water. As the steel box girder is pushed forward, if it tilts when passing the bridge tower, the tilt sensor can monitor the relevant signal in real time. The controller then adjusts the steel box girder to restore balance by pumping water to the higher side of the top surface. When the water in one side of the regulating water storage space is emptied or reduced to the set water level, the controller will alarm, prompting management personnel to pay close attention to the stability of the steel box girder and continue pumping water. If necessary, the water source in the stable water storage space should be adjusted. During this process, the pushing should be stopped, and management personnel should carefully study the current stability of the steel box girder.

[0027] In this embodiment, as Figure 1 , 2 As shown, it also includes a fixed base 6, with a controller 7 connected to the top of the fixed base 6 via a bracket. The two ends of the bidirectional pump 4 are respectively connected to the inclined pipe 19 via pipes 5. Each control unit of this new invention is independently controlled, and the number of control units is adjusted according to the length of the steel box girder segment. Through the automated control of multiple control units, the balance of the steel box girder is precisely regulated, and the stability information of the steel box girder is shared with the management personnel, ensuring the construction safety of the steel box girder when passing the bridge tower.

Claims

1. A temporary separation and stabilization control device for large-section double-span steel box girder jacking over a tower, characterized in that: The system includes several control units arranged along the axis of the top of the steel box girder. Each control unit includes a controller and two containers symmetrically arranged about the axis of the top of the steel box girder. The bottom of each container is welded to the top of the steel box girder, and a water tank is fixedly connected inside the container. A bidirectional pump is connected between the two water tanks through a pipe. Each water tank is equipped with an anti-sway mechanism, a water level sensor, and a tilt sensor. The water level sensor and the tilt sensor are electrically connected to the controller through wires. The controller is configured to control the bidirectional pump.

2. The temporary separation and stabilization control device for large-section double-span steel box girder jacking over tower as described in claim 1, characterized in that: The container is a cubic container with an open top, welded from steel bars, and the water tank is a cubic structure that is snapped into the container.

3. The temporary separation and stabilization control device for large-section double-span steel box girder jacking over the tower as described in claim 2, characterized in that: The anti-sway mechanism includes multiple partitions fixedly connected to the inner wall of the water tank in the horizontal direction. The multiple partitions are evenly distributed in the vertical direction. The adjacent partitions and the bottom partition and the bottom of the water tank form a stable water storage space. A floating block is provided above the top partition. The floating block and the top partition form an adjustable water storage space.

4. The temporary separation and stabilization control device for large-section double-span steel box girder jacking over the tower as described in claim 3, characterized in that: The floating block is also a cubic structure, including an outer metal shell and a floating block body inside the metal shell. A guide rod is fixedly provided vertically at the top of the metal shell. The guide rod passes through the top of the water tank. A limit block is fixedly connected to the top of the guide rod. A guide sleeve is fixedly connected to the lower surface of the top of the water tank. The guide rod passes through the guide sleeve and slides with the guide sleeve. The side wall surfaces of the floating block slide with the respective inner wall surfaces of the water tank.

5. The temporary separation and stabilization control device for pushing large-section double-span steel box girder over the tower as described in claim 4, characterized in that: The water level sensor is a linear displacement sensor located between the top of the floating block and the top of the water tank. The fixed end of the linear displacement sensor is fixedly connected to the top of the water tank, and the telescopic end extends vertically downward and is fixedly connected to the top of the floating block.

6. The temporary separation and stabilization control device for pushing large-section double-span steel box girder over the tower as described in claim 5, characterized in that: The water tank is also equipped with a vertically fixed pipe, which passes through the floating block and each layer of partitions. The outer wall of the pipe is slidably connected to the pre-set through hole of the floating block. The pipe is sealed and fixedly connected to the partitions. Branch pipes are provided on the pipe body of the pipe body located in each stable water storage space and the pipe body located in the regulating water storage space. Each branch pipe is equipped with an electromagnetic flow regulating valve. The electromagnetic flow regulating valve is electrically connected to the controller. The bottom end of the pipe body is sealed and fixedly connected to the bottom end of the water tank. The top end of the pipe body passes through the top end of the water tank and is integrally connected to an inclined pipe. An inlet pipe is provided at the top of the inclined pipe, which is vertically opposite to the pipe body.

7. The temporary separation and stabilization control device for pushing large-section double-span steel box girder over the tower as described in claim 6, characterized in that: It also includes a fixed base, the top of which is connected to a controller via a bracket, and the two ends of the bidirectional pump are respectively connected to the inclined pipe via pipes.

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