A bridge pier correction device and correction method

Abstract

This application relates to a bridge pier correction device, belonging to the field of bridge correction technology. It includes several hydraulic cylinders mounted on the pier cap, arranged in several rows along the length of the bridge beam. A first traction assembly is installed on the bridge to move the hydraulic cylinders in the same row along the length of the beam. A second traction assembly is installed on the piston cylinder of each hydraulic cylinder to drive the beam for lateral correction. The second traction assembly is detachably connected to the beam. This application improves the construction efficiency of bridge correction.

Description

Technical Field

[0001] This application relates to the field of bridge alignment technology, and in particular to a bridge pier alignment device and method. Background Technology

[0002] During bridge construction, supports are typically installed on the pier caps, with leveling steel plates mounted on them. When the supports are horizontal, the downward vertical load is borne by the supports, and no horizontal component force is generated at the supports. When the steel plates on the supports are not horizontal, the self-weight of the T-beam generates a horizontal component force at the supports. This horizontal force generates an opposite horizontal component force at the connecting piers, causing the pier at the movable support to slide and tilt upwards. This results in a certain offset at the pier column of the movable support, with the offset direction opposite to the beam sliding direction, i.e., tilting upwards on the longitudinal slope, exacerbating the misalignment of the supports. The thermal expansion and contraction of the beam and the dynamic load further aggravate the longitudinal misalignment of the tilted pier. This damage causes permanent tilting deformation of the pier and permanent sliding of the supports; some supports have already slipped out of the support steel plates. This damage is irreversible, cannot self-repair, and will continue to develop at an increasingly rapid pace.

[0003] To correct bridge deviation, the general procedure is as follows: lift the bridge with jacks, remove the bearings, replace the leveling steel plates, install temporary sliding bearings, lower the beams, perform lateral deviation correction, perform longitudinal deviation correction, lift the bridge again, remove the temporary bearings, and install new bearings.

[0004] Regarding the aforementioned technologies, in the traditional process of bridge alignment, the first jacking, lateral alignment, longitudinal alignment, and second jacking are all carried out by jacking. Moreover, each process requires the dismantling of the jacking equipment from the previous process and then reinstalling it in a different position, resulting in extremely low construction efficiency for bridge alignment. Summary of the Invention

[0005] To improve the construction efficiency of bridge pier correction, this application provides a bridge pier correction device and correction method.

[0006] The bridge pier correction device provided in this application adopts the following technical solution:

[0007] A bridge pier correction device includes several hydraulic cylinders, which are mounted on the pier cap and arranged in several rows along the length of the beam. A first traction assembly is provided on the bridge to drive the hydraulic cylinders in the same row to move along the length of the beam. A second traction assembly is provided on the piston cylinder of each hydraulic cylinder to drive the beam to perform lateral correction. The second traction assembly is detachably connected to the beam.

[0008] By adopting the above technical solution, the hydraulic cylinder lifts the beam. After the lifting is completed, the existing support is replaced and removed, wedge steel plates are installed, and temporary sliding supports are replaced. Then, the hydraulic cylinder resets and drives the beam to fall. Next, the second traction component drives the beam to move along the length of the pier cap, thereby correcting the lateral deviation of the bridge pier. Then, the first traction component drives the beam to move along the length of the beam, thereby correcting the lateral and longitudinal deviations of the bridge pier.

[0009] After the bridge piers are corrected, the hydraulic cylinders are activated again to lift the bridge beam. Then, the temporary sliding supports are removed and replaced with new ones. The hydraulic cylinders are then used to lower the beam again, thus completing the bridge misalignment correction. The tools for bridge lifting, lateral correction, and longitudinal correction are integrated. Lateral and longitudinal corrections are performed using traction instead of jacking. This eliminates the need for repeatedly dismantling and installing tools to sequentially complete the lifting, lateral correction, and longitudinal correction processes. Furthermore, the use of traction instead of the traditional hydraulic cylinder jacking method for lateral and longitudinal corrections eliminates the need for reaction frames, thus improving the efficiency of bridge correction work.

[0010] Optionally, the first traction assembly includes a first hydraulic motor, which is mounted on a pier cap close to the correction beam. A traction turntable is mounted on the first hydraulic motor, and a traction rope is wound on the traction turntable. The traction rope is connected to a hydraulic cylinder adjacent to the first hydraulic motor. A track is shared on several pier caps, and the track is arranged along the length of the beam. The hydraulic cylinder is slidably mounted on the track, and a limit bolt is provided on the track. When the hydraulic cylinder is lifted, the limit bolt is threadedly connected to the hydraulic cylinder.

[0011] By adopting the above technical solution, after the lateral correction is completed, the first hydraulic motor is started. The first hydraulic motor drives the traction turntable to rotate, and the traction turntable drives the traction rope to wind up. The traction rope pulls the hydraulic cylinder close to the first hydraulic motor to move along the track. The remaining hydraulic cylinders move along the track at the same time, so that the hydraulic cylinders drive the bridge to move along the direction of movement of the track, thus completing the longitudinal correction of the bridge.

[0012] Optionally, the track includes several slide rails, each corresponding to a stop cap. Each slide rail is mounted on a corresponding stop cap. At least two fixed seats are slidably mounted on the bottom of each slide rail. A screw is mounted on the side wall of the stop cap, passing through the fixed seat. A fixing nut is threaded onto the screw, and the fixing nut abuts against the fixed seat. One end of each slide rail is provided with a plug-in block, and the other end is provided with a plug-in groove. The plug-in block is inserted into the plug-in groove of an adjacent slide rail. Two adjacent slide rails share a reinforcing rod, which supports the joint of the two adjacent slide rails.

[0013] By adopting the above technical solution, when installing the slide rail, first place the two fixed seats far apart from each other, then place the slide rail on the pier cap, and move the two fixed seats closer to each other. The fixed seats pass through the screw rod on the same side, and then tighten the fixing nut on the screw rod, so that the slide rail is fixed on the pier cap. Install the slide rail on each pier cap in sequence and splice the adjacent slide rails together, so as to facilitate the installation of the slide rail.

[0014] Optionally, the slide rail has a sliding groove, the plug block is slidably disposed in the sliding groove, the slide rail is rotatably connected to a rotating shaft, one end of the rotating shaft passes through the sliding groove, a gear is provided at the end of the rotating shaft passing through the sliding groove, the plug block is connected to a rack, the rack meshes with the gear, and a rotating groove is provided at the end of the rotating shaft extending out of the slide rail to facilitate its rotation.

[0015] By adopting the above technical solution, the rotating shaft rotates through the rotating groove, which in turn drives the gear to rotate. The gear then drives the rack to move, and the rack moves the insertion block to insert into the insertion groove of the adjacent slide rail, thereby achieving the splicing of adjacent slide rails. When disassembling the slide rails, the insertion block is retracted into the sliding groove, separating the adjacent slide rails and facilitating their removal. The reinforcing rod strengthens the rigidity of the slide rails, reducing the possibility of deformation at the slide rail splice.

[0016] Optionally, the second traction assembly includes a connecting plate, which is disposed on the piston rod of the hydraulic cylinder. A second hydraulic motor is disposed on the connecting plate, and the second hydraulic motor is connected to a lead screw. The lead screw is disposed along the length direction of the pier cap and is rotatably connected to the connecting plate. A movable nut is threaded onto the lead screw, and a fixed plate is connected to the movable nut. The fixed plate is connected to the bottom of the beam.

[0017] By adopting the above technical solution, the second hydraulic motor drives the lead screw to rotate, the lead screw drives the moving nut to move along the length direction of the lead screw, the moving nut drives the fixed plate to move, and several fixed plates drive the beam to move along the length direction of the pier cap, thereby realizing the lateral correction of the bridge pier column.

[0018] This application also provides a method for correcting the deviation of bridge piers, which is achieved through the bridge pier correction device, and includes the following steps:

[0019] S1. Remeasure the pier offset to determine the correction value of the pier;

[0020] S2. Lift the beam, remove the old supports, and replace the original leveling steel plate with a wedge-shaped steel plate;

[0021] S3. Install temporary sliding supports and lower the beam;

[0022] S4. Use traction to correct the beam's lateral deviation, and then immediately use traction to correct the beam's longitudinal deviation.

[0023] S5. Lift the beam again; remove the temporary sliding support, install new support, and lower the beam again.

[0024] By adopting the above technical solution, after the sliding support is installed and the beam is lowered, there is no need to replace the equipment; lateral and longitudinal corrections can be directly performed by traction.

[0025] Optionally, in step S1, at least two different methods should be used for measurement comparison to determine the accurate offset of the bridge pier before construction. The offset is the offset of the bridge pier column.

[0026] By adopting the above technical solution, the accuracy of offset measurement is improved, enabling the bridge to be accurately corrected.

[0027] Optionally, the wedge-shaped steel plate in step S2 should be fabricated according to the longitudinal and transverse slope values ​​and dimensions of the lower surface of each pre-embedded steel plate at the bottom of the beam, and ensure that the lower surface of the wedge-shaped steel plate remains horizontal in the longitudinal and transverse directions.

[0028] By adopting the above technical solution, the situation where the bridge would deviate again later due to the uneven bottom of the wedge-shaped steel plate was avoided.

[0029] Optionally, in step S5, the lifting of the beam is divided into two stages: pre-lifting and formal lifting. In the pre-lifting stage, the jacks are used to lift the beam to the design load as the control load. During the lifting and unloading process, the lifting system and the beam are observed to see if any problems occur and the corresponding problems are eliminated.

[0030] By adopting the above technical solution, the jacking is divided into two stages. Pre-jacking can detect or anticipate problems that may occur during the jacking process in advance, which is convenient for timely rectification and avoids safety accidents, bridge cracking, or bridge deviation failure during the formal jacking.

[0031] Optionally, if there are no problems left in the pre-lifting process, the formal lifting stage can be entered. During the lifting process, attention should be paid to the inspection of each part of the system, and after lifting to the design position, temporary supports should be set up to share the load borne by the lifting system.

[0032] By adopting the above technical solution, the temporary support can share the load on the hydraulic cylinder, reduce the possibility of damage to the hydraulic cylinder, and when the hydraulic cylinder fails, the temporary support can also play a protective role, thereby reducing the occurrence of safety accidents.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The tools for bridge jacking, lateral correction, and longitudinal correction are integrated, and the lateral and longitudinal corrections are performed by traction instead of jacking. First, it eliminates the need to repeatedly dismantle and install tools to complete the bridge jacking, lateral correction, and longitudinal correction processes in sequence. Second, the traction method replaces the traditional hydraulic cylinder jacking method for lateral and longitudinal correction, eliminating the need for reaction frame installation and improving the construction efficiency of bridge correction.

[0035] 2. The rotating shaft drives the gear to rotate, the gear drives the rack to move, and the rack drives the plug block to insert into the plug slot of the adjacent slide rail, thereby realizing the splicing of the adjacent slide rail. When disassembling the slide rail, the plug block is returned to the sliding groove to separate the adjacent slide rail, thus facilitating the removal of the slide rail. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0037] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0038] Figure 3 yes Figure 1 Enlarged schematic diagram of part B.

[0039] Figure 4 This is a schematic diagram illustrating the structure of the lead screw and the movable nut in an embodiment of this application.

[0040] Figure 5 This is a schematic diagram illustrating the structure of the sliding groove, gear, and rack in an embodiment of this application.

[0041] Figure 6 This is a schematic diagram illustrating the structure of the plug slot in the embodiment of this application.

[0042] Explanation of reference numerals in the attached drawings: 1. Hydraulic cylinder; 2. First traction assembly; 22. Limit bolt; 23. Connecting rope; 24. First hydraulic motor; 25. Traction turntable; 26. Traction rope; 3. Second traction assembly; 31. Connecting plate; 311. Slide groove; 32. Lead screw; 33. Moving nut; 34. Fixed plate; 35. Second hydraulic motor; 4. Rail; 41. Slide rail; 411. Sliding groove; 412. Insertion groove; 42. Insertion block; 43. Rack; 44. Rotating shaft; 441. Rotating groove; 45. Gear; 46. Fixed seat; 47. Screw; 48. Fixed nut; 49. Reinforcing rod. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0044] This application discloses a bridge pier correction device.

[0045] like Figure 1 The bridge pier correction device includes several hydraulic cylinders 1, which are mounted on the pier cap and arranged in several rows along the length of the beam. A first traction assembly 2 is mounted on the pier cap to move the same row of hydraulic cylinders 1 along the length of the beam. A second traction assembly 3 is mounted on the piston cylinder of each hydraulic cylinder 1 to drive the beam for lateral correction. The second traction assembly 3 is detachably connected to the beam.

[0046] Hydraulic cylinder 1 lifts the beam. After lifting, the existing support is replaced and removed, wedge steel plate is installed, and temporary sliding support is replaced. Then, hydraulic cylinder 1 resets and drives the beam to fall. Next, the second traction component 3 drives the beam to move along the length of the pier cap to achieve lateral correction of the bridge pier. Then, the first traction component 2 drives the beam to move along the length of the beam to achieve lateral and longitudinal correction of the bridge pier.

[0047] like Figure 2 and Figure 3 The pier cap is equipped with several first traction components 2, each including a track 4. The track 4 extends along the length of the beam. Several hydraulic cylinders 1 in the same row are slidably disposed within the same track 4. Each hydraulic cylinder 1 is initially connected to the track 4 via a limiting bolt 22. Two limiting bolts 22 are provided, each located on one side of the track 4.

[0048] Several hydraulic cylinders 1 in the same group are connected by several connecting ropes 23. The connecting ropes 23 are steel wire ropes. A first hydraulic motor 24 is provided at one end of the track 4. A traction turntable 25 is provided on the first hydraulic motor 24. A traction rope 26 is wound on the traction turntable 25. The traction rope 26 is connected to the hydraulic cylinder 1 near the first hydraulic motor 24.

[0049] like Figure 3 and Figure 4The second traction assembly 3 includes a connecting plate 31, which is fixedly connected to the piston rod of the hydraulic cylinder 1. A lead screw 32 is rotatably connected to the connecting plate 31, and the lead screw 32 is arranged along the length direction of the pier cap. A movable nut 33 is rotatably connected to the lead screw 32. A sliding groove 311 is formed on the connecting plate 31 along its length direction, and both the lead screw 32 and the movable nut 33 are located in the sliding groove 311. The top of the movable nut 33 is flush with the top of the connecting plate 31. A fixing plate 34 is provided on the top of the movable nut 33. The fixing plate 34 and the movable nut 33 can be connected by bolts or welding. The fixing plate 34 is connected to the bottom of the beam body, and the connection between the fixing plate 34 and the bottom of the beam body can be achieved by rebar installation or bolt connection. A second hydraulic motor 35 is provided on the connecting plate 31, and the second hydraulic motor 35 is connected to the lead screw 32 and drives it to rotate.

[0050] When correcting the deviation of bridge piers, hydraulic cylinder 1 pushes connecting plate 31 upward. Several connecting plates 31 move upward at the same time to lift the bridge being corrected. After the lifting is completed, the existing supports are replaced and removed, wedge steel plates are installed, temporary sliding supports are replaced, and then hydraulic cylinder 1 is reset to drive the beam to fall.

[0051] Next, the second hydraulic motor 35 drives the lead screw 32 to rotate, the lead screw 32 drives the moving nut 33 to move along the length direction of the lead screw 32, the moving nut 33 drives the fixed plate 34 to move, and several fixed plates 34 drive the beam to move along the length direction of the pier cap, thereby realizing the lateral correction of the bridge pier column.

[0052] After the lateral correction is completed, the first hydraulic motor 24 is started. The first hydraulic motor 24 drives the traction turntable 25 to rotate. The traction turntable 25 drives the traction rope 26 to wind up. The traction rope 26 pulls the hydraulic cylinder 1 closest to the first hydraulic motor 24 to move along the track 4. The connecting rope 23 of the adjacent hydraulic cylinder 1 is in a taut state. When the first hydraulic cylinder 1 moves, the remaining hydraulic cylinders 1 move along the track 4 at the same time. The hydraulic cylinder 1 drives the connecting plate 31 to move along the track 4. The connecting plate 31 drives the fixed plate 34 to move, so that the fixed plate 34 drives the bridge to move along the moving direction of the track 4, thus completing the longitudinal correction of the bridge.

[0053] After the bridge pier correction is completed, hydraulic cylinder 1 is activated again to lift the beam. Then, the temporary sliding support is removed and replaced with a new one. Hydraulic cylinder 1 is then lowered back down, thus completing the bridge misalignment correction. The tools for bridge lifting, lateral correction, and longitudinal correction are integrated, and lateral and longitudinal corrections are performed using traction instead of jacking. This eliminates the need for repeatedly dismantling and installing tools to sequentially complete the bridge lifting, lateral correction, and longitudinal correction processes. Furthermore, the use of traction instead of the traditional hydraulic cylinder 1 jacking method for lateral and longitudinal corrections eliminates the need for reaction frames, improving the efficiency of bridge correction construction.

[0054] like Figure 5 and Figure 6 The track 4 includes several slide rails 41. One end of each slide rail 41 has a sliding groove 411. A plug block 42 is slidably disposed in the sliding groove 411. One end of the plug block 42 extending out of the sliding groove 411 is connected to a rack 43. The rack 43 is located in the sliding groove 411. A rotating shaft 44 is rotatably disposed on the slide rail 41. One end of the rotating shaft 44 extends into the sliding groove 411. A gear 45 is disposed at the end of the rotating shaft 44 extending into the sliding groove 411. The gear 45 meshes with the rack 43. A rotating groove 441 is provided at the end of the rotating shaft 44 away from the rack 43 to facilitate the rotation of the rotating shaft 44.

[0055] One end of the slide rail 41 opposite to the insertion block 42 is provided with an insertion groove 412. The insertion block 42 of one slide rail 41 is inserted into the insertion groove 412 of the adjacent slide rail 41. Each pier cap under the beam that needs to be corrected is connected to a slide rail 41. Two fixing seats 46 are slidably provided at the bottom of each slide rail 41. Screws 47 are inserted on both sides of the pier cap. The two fixing seats 46 are located on one side of the pier cap. The screws 47 pass through the fixing seats 46 located on the same side. A fixing nut 48 is threaded onto the screws 47 and abuts tightly against the fixing seats 46. Adjacent slide rails 41 are provided with a reinforcing rod 49. The reinforcing rod 49 is set along the length of the slide rail 41. One end of the reinforcing rod 49 is bolted to one of the slide rails 41, and the other end of the reinforcing rod 49 is bolted to the other slide rail 41.

[0056] When installing the slide rail 41, first, move the two fixed seats 46 away from each other. Then, place the slide rail 41 on the pier cap and move the two fixed seats 46 closer together. The fixed seats 46 pass through the screw 47 on the same side, and then tighten the fixing nut 48 on the screw 47 to fix the slide rail 41 on the pier cap. Install the slide rail 41 on each pier cap in sequence and splice adjacent slide rails 41 together. Next, rotate the rotating shaft 44 through the rotating groove 441. The rotating shaft 44 drives the gear 45 to rotate, the gear 45 drives the rack 43 to move, and the rack 43 drives the insertion block 42 to insert into the insertion groove 412 of the adjacent slide rail 41, thereby realizing the splicing of adjacent slide rails 41. The reinforcing rod 49 strengthens the rigidity of the slide rail 41 and reduces the deformation of the slide rail 41 splicing point.

[0057] The implementation principle of this application embodiment is as follows: Hydraulic cylinder 1 lifts the bridge pier to facilitate the removal of old supports and replacement of leveling steel plates with wedge-shaped steel plates. Then, hydraulic cylinder 1 is installed to lower the beam. Subsequently, the second hydraulic motor 35 is activated, causing the moving nut 33 to drive the beam body for lateral correction. Immediately afterwards, the first hydraulic motor 24 pulls all hydraulic cylinders 1 to move along the track 4, thereby causing the fixed plate 34 to drive the bridge for longitudinal correction. After the bridge pier correction is completed, hydraulic cylinder 1 is activated again to lift the beam body. Then, the temporary sliding support is removed and replaced with a new support. Then, hydraulic cylinder 1 lowers the beam again, thus completing the bridge deviation treatment. The tools for bridge lifting, lateral correction, and longitudinal correction are integrated, and lateral and longitudinal correction are performed by traction instead of jacking. First, it eliminates the need to repeatedly remove and install tools to complete the bridge lifting, lateral correction, and longitudinal correction processes sequentially. Second, the use of traction instead of the traditional method of jacking with hydraulic cylinder 1 for lateral and longitudinal correction eliminates the need for reaction frame installation, improving the construction efficiency of bridge correction.

[0058] This application also discloses a method for correcting the deviation of bridge piers, applied to the bridge pier correction device of this application, including the following steps:

[0059] S1. Remeasure the pier offset to determine the correction value of the pier;

[0060] During the re-measurement, at least two different methods should be used for measurement comparison. For example, by using a total station, the baseline method, the small angle method, and the forward intersection method can be used to re-measure the pier offset to determine the accurate offset value of the pier before construction, thereby determining the correction value of the pier. The correction value is the pier offset.

[0061] S2. Lift the beam, remove the old supports, and replace the original leveling steel plate with a wedge-shaped steel plate.

[0062] Accurately measure the longitudinal and transverse slope values ​​and dimensions of the lower surface of each embedded steel plate at the bottom of the beam. Based on the measured longitudinal and transverse slope values ​​and dimensions, process the wedge-shaped steel plates at the bottom of the beam. Before processing the new wedge-shaped steel plates at the bottom of the beam, accurately measure the dimensions of the embedded steel plates at the bottom of the beam. Use an electronic angle measuring instrument to accurately measure the longitudinal and transverse slopes of the bottom surface of the embedded steel plates, and assign a unique number to each steel plate. Based on the measurement results of the embedded steel plates at the bottom of the beam, process the new wedge-shaped steel plates at the bottom of the beam in the factory. To ensure the weldability of the steel plates, the new wedge-shaped steel plates in this embodiment of the application use Q345C type steel plates.

[0063] The total lifting height should be controlled within 0.5cm, just enough to remove the supports. After the lifting is stable, remove the supports that require leveling the upper steel plate.

[0064] The pre-processed corresponding wedge-shaped steel plates are welded to the lower surface of the pre-embedded steel plate at the bottom of the beam. It is essential to ensure that the lower surface of the wedge-shaped steel plates remains horizontal in both the longitudinal and transverse directions of the bridge.

[0065] S3. Install temporary sliding supports and lower the beam;

[0066] A temporary sliding bearing is installed between the bearing pad and the newly added wedge-shaped steel plate. The temporary sliding bearing consists of a stainless steel plate and a polytetrafluoroethylene (PTFE) plate bridge. The stainless steel plate is placed on top of the PTFE plate, and a silicone grease layer is placed between the stainless steel plate and the PTFE plate to allow the stainless steel plate and the PTFE plate to slide freely. Then, the jacking is canceled and the beam is placed on the temporary sliding bridge bearing, and the temporary sliding bearing is allowed to slide freely. Then, the beam is lowered and the wedge-shaped steel plate is placed on the temporary sliding bearing.

[0067] S4. Use traction to correct the beam's lateral deviation, and then immediately use traction to correct the beam's longitudinal deviation.

[0068] Both lateral and longitudinal alignment of the beam are achieved using a traction method. The second hydraulic motor 35 drives the lead screw 32 to rotate, which in turn moves the moving nut 33. The moving nut 33 then moves the beam laterally to achieve lateral alignment. The first hydraulic motor 24 drives the traction disc 25 to rotate, which in turn pulls the traction rope 26. The traction rope 26 then moves the hydraulic cylinder 1, thereby causing the fixed plate 34 to move the beam longitudinally to achieve longitudinal alignment. By replacing the jacking method with traction, the need for installing a reaction frame via rebar installation is eliminated, thus improving alignment efficiency.

[0069] S5. Lift the beam again; remove the temporary sliding support, install the new support, and lower the beam again;

[0070] The lifting of the beam consists of two stages: pre-lifting and formal lifting.

[0071] The main purpose of pre-lifting is to eliminate potential problems with the entire lifting system, such as air pressure issues, oil leaks at hydraulic connections, and insufficient oil pump pressure, while also eliminating inelastic deformation that may occur during the lifting process. Pre-lifting uses the jacks to reach the design load as the control load and should be maintained for at least 5 minutes before unloading. After unloading, a thorough inspection should be conducted to check for deformation of the steel plates above and below the jacks. If necessary, the thickness of the steel plates can be adjusted to meet the lifting requirements. After unloading, a careful inspection should be conducted to check for any differences in the structure beneath the jacks compared to before lifting. If any differences exist, the cause must be thoroughly investigated before formal lifting can begin; lifting must not proceed without a clear understanding of the situation.

[0072] Once the pre-lifting process is completely problem-free, the formal jacking can begin. During the formal jacking, strict control of jacking pressure and displacement is crucial; the displacement difference between adjacent jacks must not exceed 2mm. Simultaneously, thorough inspection of all parts of the system is necessary during the jacking process. After jacking to the designed position, temporary supports can be installed. These temporary supports are made of pre-fabricated thick steel plates. They should be placed promptly when the beam itself has been lifted to a height within 5mm, providing sufficient working space. The temporary supports should be positioned close to the jack locations and appropriately spaced.

[0073] After the formal jacking is completed, the temporary sliding support is removed. In this embodiment, a GJZF type PTFE sliding plate rubber support is used. When installing the support, the upper steel plate and the wedge-shaped steel plate of the support are welded together to ensure a reliable connection. During this process, it is strictly forbidden for tools or the plate rubber support to collide with the temporary support and jack. The removed support must not be dropped directly to the ground to avoid possible damage to high-pressure oil pipes, power lines, etc.

[0074] Before lowering the beam, ensure that all temporary supports have been removed and the bearings have been installed. When lowering the beam, pay attention to whether the beam's deceleration and displacement changes are consistent at each pier. If the difference is too large, find the cause, address it, and lower the beam again.

[0075] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bridge pier column deviation rectification device, characterized in that: The application relates to a bridge rectification device, which comprises a plurality of hydraulic cylinders (1), the hydraulic cylinders (1) are arranged on a pier cap, and the hydraulic cylinders (1) are arranged in a plurality of rows along the length direction of a beam body; a first traction assembly (2) is arranged on the bridge and used for driving the hydraulic cylinders (1) in the same row to move along the length direction of the beam body; a second traction assembly (3) is arranged on the piston cylinder of the hydraulic cylinder (1) and used for driving the beam body to be transversely rectified; and the second traction assembly (3) is detachably connected with the beam body. The first traction assembly (2) comprises a first hydraulic motor (24), the first hydraulic motor (24) is arranged on the pier cap close to the rectified beam body, a traction rotating disc (25) is arranged on the first hydraulic motor (24), a traction rope (26) is wound on the traction rotating disc (25), the traction rope (26) is connected with the hydraulic cylinder (1) adjacent to the first hydraulic motor (24), a track (4) is arranged on a plurality of pier caps, the track (4) is arranged along the length direction of the beam body, the hydraulic cylinder (1) is slidably arranged on the track (4), a limiting bolt (22) is arranged on the track (4), and the limiting bolt (22) is threadedly connected with the hydraulic cylinder (1) when the hydraulic cylinder (1) is jacked up. The second traction assembly (3) comprises a connecting plate (31), the connecting plate (31) is arranged on the piston rod of the hydraulic cylinder (1), a second hydraulic motor (35) is arranged on the connecting plate (31), the second hydraulic motor (35) is connected with a lead screw (32), the lead screw (32) is arranged along the length direction of the pier cap, the lead screw (32) is rotationally connected with the connecting plate (31), a moving nut (33) is threadedly connected with the lead screw (32), the moving nut (33) is connected with a fixed plate (34), and the fixed plate (34) is connected with the bottom of the beam body.

2. The bridge pier column deviation rectification device according to claim 1, characterized in that: The track (4) comprises a plurality of slide rails (41), the slide rails (41) are in one-to-one correspondence with the pier caps, each slide rail (41) is arranged on a corresponding pier cap, the bottom of the slide rail (41) is slidably provided with at least two fixed seats (46), a screw rod (47) is arranged on the side wall of the pier cap, the screw rod (47) penetrates through the fixed seat (46), a fixed nut (48) is threadedly connected with the screw rod (47), the fixed nut (48) is tightly abutted with the fixed seat (46), one end of the slide rail (41) is provided with a plug-in block (42), the other end of the slide rail (41) is provided with a plug-in groove (412), the plug-in block (42) is plugged into the plug-in groove (412) of the adjacent slide rail (41), and two adjacent slide rails (41) are commonly provided with a reinforcing rod (49), the reinforcing rod (49) supports the splicing position of the two adjacent slide rails (41).

3. The bridge pier column deviation rectification device according to claim 2, characterized in that: The sliding groove (411) is arranged in the sliding rail (41), the plug-in block (42) is arranged in the sliding groove (411), the rotating shaft (44) is rotatably connected with the sliding rail (41), one end of the rotating shaft (44) penetrates into the sliding groove (411), the gear (45) is arranged on the end of the rotating shaft (44) penetrating into the sliding groove (411), the rack (43) is connected with the plug-in block (42), the rack (43) is engaged with the gear (45), and the rotating groove (441) for conveniently controlling rotation of the rotating shaft (44) is formed in the end of the rotating shaft (44) extending out of the sliding rail (41).

4. A method for rectifying a bridge pier column, using the bridge pier column rectifying device according to any one of claims 1-3, characterized in that: The method comprises the following steps: S1, re-measuring the bridge pier offset to determine the bridge pier correction value; S2, jacking the beam body, removing the old support, and replacing the original leveling steel plate with a wedge-shaped steel plate; S3, installing a temporary sliding support and lowering the beam; S4, correcting the beam body in the transverse direction by traction, and then immediately correcting the beam body in the longitudinal direction by traction; S5, jacking the beam body again, removing the temporary sliding support, installing a new support, and lowering the beam again.

5. The bridge pier column deviation rectification method according to claim 4, characterized by: In step S1, at least two different ways of measurement comparison should be used to determine the accurate offset of the bridge pier before construction, and the correction value is the offset of the bridge pier.

6. The bridge pier column deviation rectification method according to claim 4, characterized by: The wedge-shaped steel plate in step S2 should be processed according to the longitudinal and transverse slope values and sizes of the lower surface of each embedded steel plate at the beam bottom, and the longitudinal and transverse bridge directions of the lower surface of the wedge-shaped steel plate should be kept horizontal.

7. The bridge pier column deviation rectification method according to claim 4, characterized by: In step S5, jacking the beam body is divided into two stages of pre-jacking and formal jacking, the pre-jacking stage is controlled by the jacking jack to the design load, and whether the jacking system and the beam body have problems during the jacking process and the unloading process is observed and the corresponding problems are eliminated.

8. The bridge pier column deviation rectification method according to claim 7, characterized by: When there is no problem left in the pre-jacking process, enter the formal jacking stage, pay attention to the inspection of each part of the system during the jacking process, and set temporary support to share the load of the jacking system after jacking to the design position.

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