Dismantling device and method for cross beam of water steel box beam support

Abstract

The invention discloses a device and method for dismantling a cross beam of an overwater steel box girder support, and the device comprises a construction trestle which is located at one side of a steel box girder; the hoisting equipment is arranged on the construction trestle; the hanging frame structure is arranged at one end, close to the hoisting equipment, of the steel box girder, so that a working platform is formed on the hanging frame structure; the clamping mechanism is mounted on the hanging frame structure through a transverse sliding mechanism; the traction mechanism is used for moving the clamping mechanism to move in the direction of the transverse sliding mechanism, and dismounting is achieved by driving the cross beam to move in the direction away from the steel box beam support. According to the dismantling device, the hoisting equipment, the hanging frame structure, the clamping mechanism and the traction mechanism are used for transversely pulling the cross beam out of the bottom of the steel box girder, the cross beam can be rapidly dismantled under the condition that construction safety is guaranteed, traffic jam is avoided, and the problem that traffic jam is caused when an existing steel box girder support cross beam is hoisted through double machines is solved. And meanwhile, the problem that the cross beam cannot be lowered due to river water below the steel box beam is solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a device and method for removing a cross beam of a water steel box girder support. Background Art

[0002] After the steel box girder is hoisted and welded, it will be unloaded, and the steel box girder support system needs to be completely dismantled. The conventional way to dismantle the support system beam is to use a double crane to lift the support system beam, and then lower it to the ground, and then change the crane lifting point to remove the beam. In this construction process, cranes need to be set up on both sides of the steel box girder to use two cranes to carry out the dismantling operation from both sides of the steel box girder. However, in this case, traffic on both sides of the steel box girder needs to be blocked, especially when dismantling the support beam of the bridge close to the city center, which is easy to cause traffic jams and affect people's normal travel. In the process of transferring the bottom of the support system beam to the ground, a working surface is required on the ground. For the steel box girder set on the water, since there is river water under the steel box girder, the beam cannot be lowered, making the dismantling of the beam more complicated.

[0003] In view of this, it is necessary to design a device and method for removing the cross beam of the water steel box girder support to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a device for dismantling the cross beam of a water steel box beam support, which utilizes a lifting device, a hanging frame structure, a clamping mechanism and a traction mechanism to pull the cross beam out of the bottom of the steel box beam laterally, so as to quickly complete the dismantling of the cross beam while ensuring construction safety and avoid traffic jams.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a device for removing a cross beam of a water steel box girder support, comprising: The construction trestle is located on one side of the steel box girder; A lifting device, arranged on the construction trestle, for lifting the beam; A pylon structure is arranged at one end of the steel box girder close to the lifting device, so that a working platform is formed on the pylon structure; A clamping mechanism, used for clamping the beam to be removed, wherein the clamping mechanism is mounted on the hanging frame structure through a transverse sliding mechanism; and The traction mechanism is used to move the clamping mechanism along the direction of the lateral sliding mechanism, and realize disassembly by driving the crossbeam to move away from the steel box beam support.

[0006] As a further improvement of the present invention, the bracket structure includes a first transverse plate fixed to the top surface of the steel box beam and a second transverse plate connected to the first transverse plate via a connecting rod, so that the second transverse plate serves as a working platform.

[0007] As a further improvement of the present invention, the length of the second cross plate is less than the length from one end of the cross beam close to the lifting device to the center of gravity of the cross beam.

[0008] As a further improvement of the present invention, the traction mechanism is a winch for driving the clamping mechanism to move along a direction parallel to the length of the steel box girder.

[0009] As a further improvement of the present invention, the transverse sliding mechanism includes a slide groove arranged on the second transverse plate along a direction parallel to the length of the beam and a guide block located on the slide groove, and the clamping mechanism is connected to the guide block.

[0010] As a further improvement of the present invention, the output end of the hoist is connected to the guide block.

[0011] As a further improvement of the present invention, two lifting devices are arranged on the construction trestle.

[0012] The present invention also provides a construction method for a dismantling device for a support cross beam of an above-water steel box beam, comprising the following steps: S1. Fix one end of the beam on the clamping mechanism, and use the traction mechanism to drive the clamping mechanism to move, so as to initially move the beam laterally out of the bottom of the steel box beam; S2. After the crossbeam is initially moved out of the bottom of the steel box beam, fix the end of the crossbeam close to the lifting equipment on the boom of the lifting equipment, and use the reciprocating movement of the lifting equipment and the clamping mechanism to drive the crossbeam to move laterally away from the steel box beam support until the crossbeam is completely moved out of the bottom of the steel box beam; then, connect the boom of another lifting equipment to the crossbeam to lift and transfer the crossbeam.

[0013] As a further improvement of the present invention, in step S2, under the action of the traction mechanism, when the end of the beam close to the lifting device moves laterally out of the working platform, the end of the beam close to the lifting device is fixed to the boom of the lifting device.

[0014] As a further improvement of the present invention, in step S2, the second crane is connected to the crossbeam via two suspension ropes.

[0015] The beneficial effects of the present invention are: 1. The present invention arranges a lifting device on the construction trestle and arranges a hanging frame structure at one end of the steel box girder close to the lifting device. The clamping mechanism on the hanging frame structure cooperates with the traction mechanism and the lifting device to pull the beam out of the bottom of the steel box girder, and the lifting device is used to complete the subsequent lifting and transfer of the beam, thereby solving the problem that the existing steel box girder support beam is lifted by two machines and causes traffic jams. At the same time, the method of pulling out the beam and cooperating with the setting of transferring by the lifting device also solves the problem that the beam cannot be lowered due to the river water under the steel box girder.

[0016] 2. During the process of pulling out and disassembling the crossbeam, the present invention can make the weight of the crossbeam be borne by the steel box beam support, the steel box beam support and the bracket structure and the lifting equipment, the lifting equipment and the bracket structure, and the lifting equipment respectively at different stages. That is, the steel box beam support and the bracket structure are utilized to participate in the support of the crossbeam. Compared with the conventional crossbeam disassembly process in which the weight is mainly borne by the crane, the crossbeam of the present invention is more stable during the overall disassembly process, the force on the crane is relatively small, and the construction safety is higher.

[0017] 3. The clamping mechanism of the present invention can not only cooperate with the traction mechanism to achieve traction, but also serve as a limiter, so that during the entire disassembly process, the beam can move stably along the direction of the lateral sliding mechanism under the limitation of the clamping mechanism, thereby avoiding the shaking of the beam during the lifting and disassembly process and affecting the disassembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the device for removing the cross beam of the water steel box girder support.

[0019] Figure 2 It is a schematic diagram of the structure of the hanger structure, the traction mechanism and the clamping mechanism.

[0020] Figure 3 A side view of the rack structure.

[0021] Figure 4 It is a top view of the second horizontal plate.

[0022] Figure 5 It is a structural schematic diagram of the clamping mechanism and the lateral sliding mechanism.

[0023] Figure 6 Schematic diagram of the traction mechanism initially moving the beam laterally out of the bottom of the steel box beam.

[0024] Figure 7 Schematic diagram of moving the beam using a single lifting device and traction mechanism.

[0025] Figure 8 Schematic diagram of using two lifting equipment to lift the beam.

[0026] Reference numerals 10. Construction trestle; 11. First crane; 12. Second crane; 20. Hanging frame structure; 21. First horizontal plate; 22. Connecting rod; 23. Second horizontal plate; 231. Slide groove; 232. Through hole; 233. Guide block; 311. Clamping plate; 312. Threaded rod; 313. Nut; 321. Vertical rod; 322. Cross rod; 3221. Fixed part; 3222. Moving part; 33. Traction equipment; 40. Steel box girder support; 50. Steel box girder; 60. Cross beam. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0029] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0030] like Figure 1 As shown, the present invention provides a device for removing a cross beam of a water steel box girder support, comprising: The construction trestle 10 is located on one side of the steel box girder 50; A lifting device, arranged on the construction trestle 10, for lifting the crossbeam 60; The pylon structure 20 is arranged at one end of the steel box girder 50 close to the lifting device, so that a working platform is formed on the pylon structure 20; A clamping mechanism, used for clamping the crossbeam 60 to be removed, wherein the clamping mechanism is installed on the rack structure 20 via a transverse sliding mechanism; and The traction mechanism 33 is used to move the clamping mechanism along the direction of the transverse sliding mechanism, and realize disassembly by driving the cross beam 60 to move away from the steel box beam support 40.

[0031] Specifically, the construction trestle 10 is located in front of one side of the steel box girder 50 .

[0032] Specifically, Figure 2 As shown, the rack structure 20 includes a first horizontal plate 21 fixed to the top surface of the steel box beam 50 and a second horizontal plate 23 connected to the first horizontal plate 21 through a connecting rod 22, so that the second horizontal plate 23 serves as a working platform; at least two connecting rods 22 are provided. Exemplarily, the bottom surface of the first horizontal plate 21 is welded to the top surface of the steel box beam 50; two connecting rods 22 are provided, and the two connecting rods 22 are spaced apart in a direction perpendicular to the length of the cross beam 60, so that a space for the cross beam 60 to pass through is formed between the two connecting rods 22 ( Figure 3). By welding the first cross plate 21 to the steel box beam 50 and firmly connecting the second cross plate 23 to the first cross plate 21 by using the connecting rod 22, the anti-overturning and stability of the bracket system can be enhanced, ensuring that the working platform is always in a stable state. In the process of disassembling the cross beam 60, the working platform can be combined with the traction mechanism and the clamping mechanism to achieve steady traction of the cross beam 60, and the bracket structure 20 can be used as a load-bearing member, reducing the requirements for lifting equipment during the removal of the cross beam 60 from the bottom of the steel box beam 50, thereby improving the overall safety of the construction.

[0033] Specifically, the length of the second cross plate 23 is less than the length from the end of the cross beam 60 close to the lifting device to the center of gravity of the cross beam 60. Figure 6 As shown, during the process of the left end of the beam 60 moving to the left side of the working platform, the weight of the beam 60 is mainly borne by the steel box beam support 40, that is, in this process, no lifting equipment is needed to quickly complete the initial movement of the beam 60.

[0034] Specifically, Figure 5 As shown, the clamping mechanism includes two clamping plates 311 and an adjusting component for adjusting the clamping degree of the clamping plates 311; illustratively, the two clamping plates 311 are located on both sides of the beam 60, and the top ends of the clamping plates 311 are higher than the top surface of the beam 60, and the adjusting component includes a through hole set at the top end of the clamping plate 311, a threaded rod 312 penetrated on the corresponding through holes at the top ends of the two clamping plates 311, and a nut 313 set on the threaded rod 312 on the side of the through hole away from the beam 60, the outer diameter of the nut 313 is larger than the outer diameter of the through hole, and the clamping degree between the two clamping plates 311 can be adjusted by adjusting the position of the nut 313.

[0035] Exemplarily, the transverse sliding mechanism includes a slide groove 231 arranged on the second transverse plate 23 along a direction parallel to the length of the beam 60 and a guide block 233 located on the slide groove 231. The slide groove 231 is arranged on the bottom surface of the second transverse plate 23. The second transverse plate 23 is also provided with two through holes 232 (parallel to the slide groove 231) corresponding to the two clamping plates 311. Figure 4), so that the guide block 233 is connected to the clamping plate 311 through a fixing assembly passing through the through hole 232; the fixing assembly includes a vertical rod 321 passing through the through hole 232 and a cross bar 322 connected to the bottom end of the vertical rod 321, and the top end of the vertical rod 321 is connected to the clamping plate 311; the cross bar 322 includes a fixed portion 3221 and a movable portion 3222, the fixed portion 3221 is fixed to the side of the guide block 233 at one end away from the movable portion 3222, and the movable portion 3222 is away from the fixed portion One end of the fixed portion 3221 is connected to the bottom end of the vertical rod 321, and the inner diameter of the fixed portion 3221 is larger than the outer diameter of the movable portion 3222, so that the fixed portion 3221 is sleeved on the movable portion 3222. Specifically, the fixed portion 3221 and the movable portion 3222 are connected by a mortise and tenon structure, so that the movable portion 3222 can move relative to the fixed portion 3221, and thus when the clamping degree of the two clamping plates 311 is adjusted, the length of the cross bar 322 is also adaptively changed; Specifically, the traction mechanism is a traction device 33 used to drive the clamping mechanism to move in a direction parallel to the length of the beam 60. The output end of the traction device 33 is connected to the guide block 233, so that when the traction device 33 controls the guide block 233 to move along the slide groove 231, the guide block 233 drives the clamping plate 311 to move in a direction parallel to the length of the beam 60 through the fixed component, thereby driving the beam 60 to move away from the steel box beam support 40.

[0036] The specific configuration of the traction device 33 can be realized so that the guide block 233 can reciprocate along the slide groove 231 under the action of the traction device 33. Exemplarily, the traction device 33 is a winch fixed to the bottom surface of the working plane, and the traction rope of the winch is connected to the guide block 233, so that the guide block 233 can reciprocate along the slide groove 231 under the action of the winch; other existing traction methods can also be used.

[0037] When traction is performed, the nuts 313 are adjusted to clamp the two clamping plates 311 on both sides of the cross beam 60 to realize the connection between the clamping mechanism and the cross beam 60, and the traction device 33 is controlled to work to drive the guide block 233 to move along the slide slot 231 in the direction away from the steel box beam support 40, and then the guide block 233 is used to move the clamping mechanism to move, so that the cross beam 60 is synchronously moved in the direction away from the steel box beam support 40; when the guide block 233 moves to the end of the slide slot 231 away from the steel box beam support 40, the clamping plate 311 is disconnected from the cross beam 60 when the nuts 313 are adjusted, and the clamping plate 311 is moved to the end of the slide slot 231 close to the steel box beam support 40, so that the clamping plate 311 is fixed on both sides of the cross beam 60, and again under the traction of the traction device 33, the movement of the clamping plate 311 is used to drive the cross beam 60 to move, and then by repeating the above steps, the reciprocating movement of the clamping mechanism on the working platform is used to drive the cross beam 60 to move in the direction away from the steel box beam support 40.

[0038] Specifically, two lifting equipments are arranged on the construction trestle 10 , including a first crane 11 and a second crane 12 which are arranged in sequence along a direction close to the steel box girder support 40 .

[0039] The present invention also provides a construction method for a dismantling device for a support cross beam of an above-water steel box beam, comprising the following steps: S1, fix one end of the cross beam 60 on the clamping mechanism, and use the traction device 33 to drive the clamping mechanism to move, so as to initially move the cross beam 60 laterally out of the bottom of the steel box beam 50; S2. After the cross beam 60 is initially moved out of the bottom of the steel box beam 50, fix the end of the cross beam 60 close to the first crane 11 on the boom of the first crane 11, and use the reciprocating movement of the first crane 11 and the clamping mechanism to drive the cross beam 60 to move laterally away from the steel box beam support 40 until the cross beam 60 is completely moved out of the bottom of the steel box beam 50; then, connect the boom of the second crane 12 to the cross beam 60, and lift and transfer the cross beam 60.

[0040] Specifically, after the steel box girder 50 is hoisted and welded, and the steel box girder 50 is disconnected from the cross beam 60 , the cross beam 60 is dismantled.

[0041] Specifically, in step S2, under the action of the traction device 33, when the end of the cross beam 60 close to the first crane 11 moves laterally out of the working platform, the end of the cross beam 60 close to the first crane 11 is fixed to the boom of the first crane 11 ( Figure 7 ).

[0042] Specifically, in step S2, the second crane 12 is connected to the crossbeam 60 via two suspension ropes.

[0043] Specifically, the process of disassembling the cross beam 60 by using the lifting equipment, the traction equipment 33 and the clamping mechanism is divided into three stages. The first stage: using the traction equipment 33 to initially move the cross beam 60 out of the bottom of the steel box beam 50, and move the cross beam 60 away from one end of the steel box beam bracket 40 and out of the working platform, so as to facilitate the subsequent connection of the lifting rope on the boom of the first crane 11 to the end of the cross beam 60 on the working platform. In this process, since the length of the second cross plate 23 is less than the length from the end of the cross beam 60 close to the first crane 11 to the center of gravity of the cross beam 60, the weight of the cross beam 60 is borne by the steel box beam bracket 40 ( Figure 6 ); The second stage: the cross beam 60 is continuously pulled by the reciprocating movement of the clamping mechanism to drive the cross beam 60 to move away from the steel box beam support 40. At the same time, the first crane 11 is used to support the lifting of the cross beam 60. Then, the cross beam 60 is moved under the joint action of the traction device 33, the clamping mechanism and the first crane 11 to move the cross beam 60 as a whole out of the bottom of the steel box beam 50. In this process, the overall weight of the cross beam 60 is transformed from being borne by the steel box beam 50 in the first stage to being borne by the steel box beam support 40, the bracket structure 20 and the first crane 11, and then to being borne by the first crane 11 and the bracket structure 20 again. In the traction process, in addition to using the bracket structure 20 to bear part of the weight of the cross beam 60, the clamping mechanism can also be used to limit the cross beam 60 to a certain extent to prevent the cross beam 60 from shaking significantly, thereby ensuring the safety of the aerial operation and the disassembly efficiency of the cross beam 60 ( Figure 7 ); The third stage: when the cross beam 60 is moved out of the bottom of the steel box beam 50 under the joint action of the first crane 11, the clamping mechanism and the traction device 33, the boom of the second crane 12 is connected to the cross beam 60 to transfer the cross beam 60 ( Figure 8 ); Specifically, when the cross beam 60 is moved out of the bottom of the steel box beam 50 as a whole and the cross beam 60 is connected to the two lifting equipments, the connection between the cross beam 60 and the clamping mechanism is disconnected, and the cross beam 60 is hoisted to the shore by the two lifting equipments, thus completing the disassembly and transfer of the cross beam 60; or when the cross beam 60 is moved out of the bottom of the steel box beam 50 as a whole and the cross beam 60 is connected to the two lifting equipments, the two lifting equipments and the clamping mechanism are first used to continue to move the cross beam 60 away from the steel box beam support 40. In this process, the clamping mechanism is used to assist in the hoisting of the cross beam 60, and the clamping mechanism is also used to continue to limit the cross beam 60, so that the cross beam 60 remains in a relatively stable state during the hoisting process; when the right end of the cross beam 60 moves to the end of the slide slot 231 away from the steel box beam support 40, the connection between the clamping mechanism and the cross beam 60 is disconnected, and the cross beam 60 is hoisted to the shore by the two lifting equipments, thus completing the disassembly and transfer of the cross beam 60.

[0044] The method of the present invention of using the traction equipment 33, the clamping mechanism and the lifting equipment to jointly extract the beam 60 can fully utilize the supporting function of the steel box beam support 40 during the operation, and at the same time can also utilize the hanging bracket system arranged on the steel box beam 50 to assist in supporting the beam 60 and limiting the beam 60, so that during the demolition operation, the beam 60 can remain relatively stable. In addition, since the crane mainly plays a lifting and supporting role in the demolition operation, the method has relatively small requirements for the crane and the construction site, and can quickly complete the disassembly of the beam 60 under the premise of ensuring construction safety. At the same time, since the crane is arranged on the construction trestle 10, it can also avoid traffic congestion caused by the demolition operation.

[0045] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A device for removing cross beams of a water steel box girder support, characterized in that: include: The construction trestle is located on one side of the steel box girder; A lifting device, arranged on the construction trestle, for lifting the beam; A pylon structure is arranged at one end of the steel box girder close to the lifting device, so that a working platform is formed on the pylon structure; A clamping mechanism, used for clamping the beam to be removed, wherein the clamping mechanism is installed on the hanging frame structure through a transverse sliding mechanism; as well as The traction mechanism is used to move the clamping mechanism along the direction of the lateral sliding mechanism, and realize disassembly by driving the crossbeam to move away from the steel box beam support.

2. The device for removing the cross beam of the water steel box beam support according to claim 1 is characterized in that: The bracket structure includes a first transverse plate fixed to the top surface of the steel box beam and a second transverse plate connected to the first transverse plate via a connecting rod, so that the second transverse plate serves as a working platform.

3. The device for removing the cross beam of the water steel box beam support according to claim 2 is characterized in that: The length of the second cross plate is less than the length from one end of the cross beam close to the lifting device to the center of gravity of the cross beam.

4. The device for removing the cross beam of the water steel box beam support according to claim 3 is characterized in that: The traction mechanism is a winch used to drive the clamping mechanism to move along a direction parallel to the length of the steel box beam.

5. The device for removing the cross beam of the water steel box beam support according to claim 4 is characterized in that: The transverse sliding mechanism comprises a slide groove arranged on the second transverse plate in a direction parallel to the length of the cross beam and a guide block located on the slide groove, and the clamping mechanism is connected to the guide block.

6. The device for removing the cross beam of the water steel box beam support according to claim 5 is characterized in that: The output end of the hoist is connected to the guide block.

7. The device for removing the cross beam of the water steel box beam support according to claim 1, characterized in that: Two lifting devices are arranged on the construction trestle.

8. A construction method for removing the cross beam of a water steel box beam support according to claim 1, characterized in that: The following steps are involved: S1. Fix one end of the beam on the clamping mechanism, and use the traction mechanism to drive the clamping mechanism to move, so as to initially move the beam laterally out of the bottom of the steel box beam; S2. After the crossbeam is initially moved out of the bottom of the steel box beam, fix the end of the crossbeam close to the lifting equipment on the boom of the lifting equipment, and use the reciprocating movement of the lifting equipment and the clamping mechanism to drive the crossbeam to move laterally away from the steel box beam support until the crossbeam is completely moved out of the bottom of the steel box beam; then, connect the boom of another lifting equipment to the crossbeam to lift and transfer the crossbeam.

9. The construction method of the dismantling device of the cross beam of the water steel box beam support according to claim 8 is characterized in that: In step S2, under the action of the traction mechanism, when the end of the beam close to the lifting device moves laterally out of the working platform, the end of the beam close to the lifting device is fixed to the boom of the lifting device.

10. The construction method of the device for removing the cross beam of the water steel box beam support according to claim 8 is characterized in that: In step S2, the second crane is connected to the crossbeam via two suspension ropes.

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