Bridge reinforcing jacking device and reinforcing method

Abstract

The application relates to a jacking device for bridge reinforcement, and belongs to the technical field of bridge jacking, which comprises a jacking assembly, the jacking assembly cooperates with a hydraulic system to support a bridge, a permanent support assembly is arranged on the cross section of a pier, a conveying assembly for conveying the permanent support assembly to the position between the pier and the bridge body is arranged on the jacking assembly, and the heights of the jacking assembly and the permanent support assembly can be adjusted according to the jacking height of the bridge. The application has the effect of strengthening the support of the bridge during jacking and avoiding the sinking or collapse of the bridge after jacking.

Description

Technical Field

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

[0002] The jacking of the bridge refers to the use of an overall hydraulic synchronous lifting scheme. This involves utilizing the existing cast-in-place piles for support without damaging the original bridge deck pavement, railings, sidewalks, or the connections between beams and slabs. First, a "hydraulic lifting" device is used to support the entire superstructure of the bridge. Then, the columns under each pier and abutment cap beam are cut off, and the "hydraulic lifting" device is operated again to raise the entire bridge to the design height. Finally, the reinforcement bars of the extended columns are extended, the formwork is erected, and the second phase of concrete pouring is carried out.

[0003] Regarding the aforementioned technologies, if the seals of the hydraulic device are damaged or the valves are deformed due to compression after long-term use, and if this is not detected in time before jacking and cannot be replaced during the jacking process, it may lead to liquid backflow, causing the device to fail to support the bridge. Furthermore, due to the large weight of the bridge itself, it may even cause the bridge to press against the hydraulic rods and retract, resulting in the bridge sinking or collapsing during the jacking process. Summary of the Invention

[0004] In order to strengthen the support of the bridge during jacking and prevent the bridge from sinking or collapsing after jacking, this application provides a jacking device for bridge reinforcement.

[0005] The bridge reinforcement jacking device provided in this application adopts the following technical solution: A bridge reinforcement lifting device includes a jacking assembly, which works in conjunction with a hydraulic jacking device to support the bridge. A permanent support assembly is provided on the cross-section of the bridge pier. The jacking assembly is provided with a conveying assembly for conveying the permanent support assembly between the bridge pier and the bridge body. The heights of the jacking assembly and the permanent support assembly can be adjusted according to the jacking height of the bridge.

[0006] By adopting the above technical solution, after the hydraulic jacking device performs hydraulic jacking, the jacking component provides secondary support to the bridge body. Then, the conveying component conveys the permanent support component between the pier and the bridge body, so that the jacking component and the permanent support component jointly support the bridge body, strengthen the support effect of the bridge during jacking, and avoid the situation where the bridge body sinks or collapses due to the backflow of hydraulic oil after jacking.

[0007] Optionally, the top support assembly includes a support housing, a support rod slidably disposed within the support housing, the support rod having a toothed groove along its length, a first gear, a second gear, a third gear, and a ratchet rotatably connected within the support housing, the first gear meshing with the toothed groove, the second gear coaxially disposed with the first gear, the third gear meshing with the second gear, the ratchet coaxially disposed with the third gear, ratchet teeth rotatably disposed within the support housing, the ratchet teeth meshing with the ratchet, and a rotating handle rotatably connected to the support housing for driving the shaft of the third gear to rotate.

[0008] By adopting the above technical solution, turning the handle drives the ratchet and the third gear to rotate simultaneously. The ratchet meshes with the ratchet to prevent the ratchet and the third gear from reversing. The third gear drives the second gear to rotate, the second gear drives the first gear to rotate, and the first gear drives the support rod to move upward and press against the bridge body to complete the support of the bridge body.

[0009] Optionally, a lever is connected to the end of the ratchet away from the ratchet wheel, and a pressure rod is rotatably connected to the end of the ratchet near the ratchet wheel, with the pressure rod rotatably connected to the support housing.

[0010] By adopting the above technical solution, the pressure bar presses against one end of the ratchet, which can ensure that the ratchet and ratchet are engaged when the support is being provided normally. When it is necessary to release the support rod from the bridge body, the lever is moved, and the lever causes the ratchet and ratchet to separate, and the support rod slowly descends under the action of gravity.

[0011] Optionally, the support housing has a first slide rail, and a first guide block and a second guide block are installed on the top of the support housing. A second slide rail is left between the first guide block and the second guide block, and the first slide rail is connected to the second slide rail. The permanent support assembly includes a guide rail that passes through the first slide rail and is fixed to the cross-section of the pier. A first support block is provided on the guide rail, and a first positioning element is provided on the guide rail for positioning the first support block at the cross-section of the pier. A plurality of second support blocks are provided on the first support block, with adjacent second support blocks stacked on top of each other. Each second support block is provided with a second positioning element for fixing the second support block. The conveying assembly is slidably disposed on the support housing, and the conveying assembly pushes the first support block through the first slide rail and pushes the second support blocks through the second slide rail.

[0012] By adopting the above technical solution, when the bridge body is lifted for the first time, the guide rail is first passed through the first slide and then fixed on the cross-section of the pier. Then the first support block is placed in the first slide, the pushing component pushes the first support block to be clamped between the bridge body and the pier for support, and the first positioning component fixes the first support block at the designated position on the cross-section of the pier. When the bridge body is lifted again, the first guide block and the second guide block are bolted to the top of the support housing. Then, the second support block is passed through the second slide groove and one end of the second support block is first locked between the first support block and the bridge body. Then, the sliding conveying assembly is aligned with the second support block. The conveying assembly is adjusted to push the second support block to lock between the bridge body and the first support block. When the second support block is completely stacked on the first support block, the second positioning piece fixes the second support block, completing the installation of the second support block and realizing the support of the second support block for the bridge body. Each time the bridge body is lifted, the first and second guide blocks are installed as needed, and then the second support block is inserted. The sliding conveyor assembly is then aligned with the newly inserted second support block, and the conveyor assembly pushes the newly inserted second support block to stack on the previous second support block. It is then fixed by the second positioning component. Through repeated operations, the first support block, together with several second support blocks, provides permanent support for the bridge body. Finally, after the bridge pier is recast, the first support block and several second support blocks are embedded in the concrete, and the protruding guide rails are cut off.

[0013] Optionally, the first positioning component includes a first snap-fit ​​block, the guide rail has a first sliding groove, a first spring is provided in the first sliding groove, the first spring is connected to the first snap-fit ​​block, the first snap-fit ​​block has a first guide surface, the first support block always contacts the first guide surface first when it moves toward the guide rail, the first snap-fit ​​block has a first snap-fit ​​groove, and the first snap-fit ​​block is adapted to the first snap-fit ​​groove.

[0014] By adopting the above technical solution, as the first support block gradually moves towards the central axis of the pier, the first support block first contacts the first guide surface, and the first locking block first retracts into the first sliding groove. When the first locking block is aligned with the first locking groove, the first spring drives the first locking block to insert into the first locking groove, thereby completing the fixing of the first support block.

[0015] Optionally, the second positioning element includes a second snap-fit ​​block, the bottom surface of the second support block is provided with a second sliding groove, a second spring is provided in the second sliding groove, the second spring is connected to the second snap-fit ​​block, the top surfaces of the first support block and the second support block are both provided with second snap-fit ​​grooves, and the second snap-fit ​​block is adapted to its adjacent second snap-fit ​​groove.

[0016] By adopting the above technical solution, as the second support block gradually moves towards the central axis of the pier, the second locking block is first squeezed into the second sliding groove. When the second locking groove is aligned with the second locking groove, the second spring drives the second locking block to extend into the second locking groove, thereby fixing the second support block.

[0017] Optionally, after the first support block and the second support block are fixed, a second guide surface is provided at one end near the support housing, and a shock-absorbing elastic pad is provided on the top surface of the first support block and the second support block.

[0018] By adopting the above technical solution, the second guide surface allows the user to manually push one end of the second support block and lock it between the bridge body and the first or second support block. It also allows the second locking block to be squeezed into the second locking groove through the second guide surface before being aligned with the second locking groove. The shock-absorbing elastic pad not only plays a shock-absorbing role, but also improves the tightness between the second support block and the bridge body. At the same time, the shock-absorbing elastic pad also plays a guiding role, allowing the second support block to move along the length direction of the first support block.

[0019] Optionally, the conveying assembly includes a mounting shell slidably disposed on the supporting shell, a feed sleeve passing through the mounting shell, a rotating screw threadedly connected to the feed sleeve, a limit bolt provided on the mounting shell, a guide groove formed along the length of the feed sleeve, a limit groove formed along the circumference of the feed sleeve, the guide groove communicating with the limit groove, and the limit bolt located within the guide groove when the rotating screw advances forward.

[0020] By adopting the above technical solution, when one end of the first support block is located between the bridge body and the guide rail, the sliding mounting shell makes the rotating screw face the first support block, then the feed sleeve is rotated so that the limiting bolt is in the guide groove, then the feed sleeve is pushed forward, the feed sleeve drives the rotating screw to abut against the first support block, then the feed sleeve is rotated so that the limiting bolt is in the limiting groove, and the rotating bolt is rotated by a tool, so that the rotating screw pushes the first support block to move along the guide rail and pushes the first support block to the designated position; When one end of the second support block is located between the bridge body and the guide rail, continue to move the sliding mounting shell upward so that the rotating screw is facing the second support block. Then continue to repeat the above operation to realize that the rotating screw pushes the second support block along the top surface of the first support block and pushes the second support block to the designated position.

[0021] Optionally, the supporting housing has a first T-slot along its height direction, the first T-slot penetrating the top surface of the supporting housing. The first guide block and the second guide block each have a second T-slot penetrating along their respective height directions, the second T-slot communicating with the first T-slot. The mounting shell is provided with a T-block, the T-block being adapted to and slidable along the first and second T-slots. By adopting the above technical solution, the T-shaped block slides along the first T-shaped groove and the second T-shaped groove, thereby enabling the support shell to slide along the height direction of the first guide block and the second guide block.

[0022] This application provides a bridge reinforcement method using a jacking mechanism, which employs the following technical solution: reinforcement is carried out using the aforementioned bridge reinforcement jacking device, including the following steps: S1. Install the hydraulic jacking device and support the bridge body, install the jacking assembly and support the bridge body, install the conveying assembly, and cut the bridge piers; S2. The hydraulic jacking device lifts the bridge body, adjusts the height of the jacking component to tighten it against the bottom of the bridge body, and the transmission component pushes the permanent support component to open between the pier and the bridge body for support. S3. Repeat steps S1 and S2 until the bridge body is lifted to the design height; S4. Carry out pier reinforcement, formwork and concrete pouring, and reconnect the piers and bridge body. S5. After the concrete reaches the design strength, first remove the hydraulic jacking device, then remove the jacking components, and then remove the formwork and cut the permanent support components that protrude from the concrete.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. After the hydraulic jacking device performs hydraulic jacking, the jacking component provides secondary support to the bridge body. Then, the conveying component conveys the permanent support component between the pier and the bridge body, so that the jacking component and the permanent support component jointly support the bridge body, strengthen the support of the bridge during jacking, and prevent the bridge body from sinking or collapsing due to the backflow of hydraulic oil after jacking. 2. When the bridge body is lifted for the first time, the guide rail is first passed through the first slide and then fixed on the cross-section of the pier. The pushing component pushes the first support block to be clamped between the bridge body and the pier for support. The first positioning component fixes the first support block at the designated position on the cross-section of the pier. When the bridge body is lifted again, the second support block is passed through the second slide groove and one end of the second support block is first locked between the first support block and the bridge body. The conveying component pushes the second support block to lock into the bridge body and the first support block for support. The second positioning component fixes the second support block, and the installation of the second support block is completed. Each time the bridge body is lifted, the first guide block and the second guide block are installed as needed, and then the second support block is inserted. The conveying component pushes the newly inserted second support block to be stacked on the previous second support block, and then it is fixed by the second positioning component. Through repeated operation, the first support block and several second support blocks are used to permanently support the bridge body. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0025] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0026] Figure 3 This is a schematic diagram illustrating the structure of the top support component in an embodiment of this application.

[0027] Figure 4 yes Figure 3 Enlarged diagram of part B.

[0028] Figure 5 This is a schematic diagram illustrating the structure of the permanent support component, the first positioning element, and the second positioning element in an embodiment of this application.

[0029] Figure 6 yes Figure 5 An enlarged schematic diagram of section C.

[0030] Figure 7 yes Figure 5 An enlarged schematic diagram of part D in the middle.

[0031] Figure 8 This is a schematic diagram illustrating the structure of the transmission component in an embodiment of this application.

[0032] Figure 9 yes Figure 8 An enlarged schematic diagram of section E in the middle.

[0033] Explanation of reference numerals in the attached drawings: 1. Top support assembly; 11. Support housing; 111. First T-slot; 12. Support rod; 13. Tooth groove; 14. First gear; 15. Second gear; 16. Third gear; 17. Ratchet; 18. Ratchet tooth; 19. Pressure rod; 110. Lever; 112. First slide rail; 113. Rotating handle; 21. First guide block; 22. Second guide block; 23. Second slide rail; 24. Second T-slot; 3. Permanent support assembly; 31. Guide rail; 311. First slide groove; 32. First support block; 321. First locking groove; 33. Second support block; 331. Second sliding groove; 34. Second guide surface; 35. Shock-absorbing elastic pad; 4. Conveying assembly; 41. Mounting shell; 42. T-block; 43. Feed sleeve; 431. Guide groove; 432. Limiting groove; 44. Rotating screw; 45. Limiting bolt; 46. Rotating handle; 5. First positioning element; 51. First locking block; 511. First guide surface; 52. First spring; 6. Second positioning element; 61. Second locking block; 62. Second spring; 63. Second locking groove. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0035] This application discloses a jacking device for bridge reinforcement.

[0036] like Figure 1 The bridge reinforcement lifting device includes a jacking component 1, and four jacking components 1 are provided. In this embodiment, the bridge pier is square. The hydraulic jacking device is located at both ends of the bridge pier. Each pair of jacking components 1 forms a group. The two groups of jacking components 1 are located on one side of the bridge pier. The jacking components 1 and the hydraulic jacking device leave space between them and the bridge pier for later formwork and concrete pouring. like Figure 2 , Figure 3 and Figure 4 The top support assembly 1 includes a support housing 11, a support rod 12 is slidably connected inside the support housing 11 along its height direction, the support rod 12 is provided with a toothed groove 13 along its height direction, and a first gear 14, a second gear 15 and a third gear 16 are rotatably connected inside the support housing 11. The first gear 14 and the second gear 15 are coaxially arranged, the first gear 14 meshes with the toothed groove 13, and the third gear 16 meshes with the second gear 15. like Figure 2A ratchet 17 and a ratchet tooth 18 are rotatably connected to the side of the support housing 11 away from the pier. The ratchet 17 is coaxially arranged with the third gear 16. The ratchet 17 meshes with the ratchet tooth 18. A pressure rod 19 is hinged to the end of the ratchet 17 that meshes with the ratchet tooth 18. The pressure rod 19 is hinged to the support housing 11. A lever 110 is fixed to the end of the ratchet tooth 18 away from the ratchet 17. A rotating handle 113 is rotatably connected to the support housing 11. The rotating handle 113 is coaxially arranged with the ratchet 17.

[0037] After each jacking of the bridge body by the hydraulic jacking device, the handle 113 can be turned to make the ratchet 17 and the third gear 16 rotate simultaneously. The third gear 16 drives the second gear 15 to rotate, the second gear 15 drives the first gear 14 to rotate, and the first gear 14 drives the support rod 12 to move upward. When the support rod 12 is raised to the bottom of the bridge body, the support for the bridge body can be strengthened.

[0038] During the rotation of ratchet 17, ratchet 18 engages with ratchet 17 to prevent ratchet 17 and third gear 16 from reversing. The pressure rod 19 presses down on ratchet 18 under the action of gravity, which can ensure that ratchet 18 engages with ratchet 17 when supporting normally. When it is necessary to release the support rod 12 from the bridge body, simply move the lever 110. The lever 110 drives ratchet 18 to separate from ratchet 17, and the support rod 12 slowly descends under the action of gravity.

[0039] As shown in Figure 2, a first slide rail 112 is provided on the support housing 11, which runs through both sides of the support housing 11. The first slide rail 112 extends upward along the height direction of the support housing 11 and passes through the top of the support housing 11. Several first guide blocks 21 are installed at both ends of the top surface of the support housing 11. Several first guide blocks 21 at the same end are stacked vertically. Adjacent first guide blocks 21 are fixed with bolts. The first guide block 21 close to the support housing 11 is connected to the support housing 11 by bolts.

[0040] A number of second guide blocks 22 are installed on the top surface of the support housing 11. The thickness of the second guide block 22 is the same as the thickness of the first guide block 21. The number of second guide blocks 22 is the same as the number of first guide blocks 21 at one end of the support housing 11. The number of second guide blocks 22 are stacked vertically. Adjacent second guide blocks 22 are fixed with bolts. The second guide block 22 near the support housing 11 is bolted to the support housing 11.

[0041] The support rod 12 extends out from the second guide block 22. A second slide 23 is left between the first guide block 21 and the second guide block 22. The second slide 23 is connected to the first slide 112.

[0042] The specific number of the first guide block 21 and the second guide block 22 is determined according to the lifting height of the bridge body. In this embodiment of the application, the number of the first guide block 21 is four and the number of the second guide block 22 is two.

[0043] like Figure 5 and Figure 6 A permanent support component 3 is provided on the cross-section of the bridge pier, and a conveying component 4 is installed on the support shell 11. The conveying component 4 conveys the permanent support component 3 to the cross-section of the bridge pier through the first slide rail 112 and the second slide rail 23.

[0044] The permanent support assembly 3 includes a guide rail 31 that passes through a first slide rail 112. One end of the guide rail 31 is fixed to the cross-section of the pier, and the other end of the guide rail 31 is fixed inside the first slide rail 112. A first positioning element 5 is provided at one end of the guide rail 31 located on the cross-section of the pier. A first support block 32 is fixed to the guide rail 31 through the first positioning element 5. Several second support blocks 33 are stacked vertically on the first support blocks 32. A second positioning element 6 is provided on the second support blocks 33 for fixing itself.

[0045] A second guide surface 34 is provided at one end of the first support block 32 and the second support block 33 near the support housing 11. The second guide surface 34 is located on the top surface of the first support block 32 and the second support block 33. Shock-absorbing elastic pads 35 are attached to the top surface of both the first support block 32 and the top surface of the second support block 33.

[0046] The first positioning component 5 includes a first locking block 51. The guide surface of the guide rail 31 is provided with a first sliding groove 311. A first spring 52 is fixed in the first sliding groove 311. The first spring 52 is connected to the first locking block 51. The end of the first locking block 51 facing the support housing 11 is provided with a first guide surface 511. The first guide surface 511 is located on the top surface of the first locking block 51. When the first support block 32 moves toward the guide rail 31, it always contacts the first guide surface 511 first. The bottom surface of the first support block 32 is provided with a first locking groove 321. The first locking block 51 extends into the first locking groove 321 and is adapted to the first locking groove 321.

[0047] The second positioning component 6 includes a second locking block 61. The bottom surface of the second support block 33 is provided with a second sliding groove 331. A second spring 62 is fixed in the second sliding groove 331. The second spring 62 is connected to the second locking block 61. The top surfaces of the first support block 32 and the second support block 33 are both provided with second locking slots 63. The second locking block 61 extends into the adjacent second locking slot 63 and is adapted to the second locking slot 63.

[0048] When the bridge body is lifted for the first time, the guide rail 31 is first passed through the first slide rail 112 and fixed to the cross-section of the pier. Then, the first support block 32 is placed in the first slide rail 112. The conveying component 4 pushes the first support block 32 to move along the guide rail 31. The shock-absorbing elastic pad 35 makes the first support block 32 fit tightly against the bottom of the bridge body. As the first support block 32 gradually moves closer to the center of the pier, the first support block 32 first contacts the first guide surface 511. The first locking block 51 is first squeezed back into the first slide groove 311. When the first locking block 51 is facing the first locking groove 321, the first spring 52 drives the first locking block 51 to insert into the first locking groove 321, thereby completing the fixing of the first support block 32. After the first lifting of the bridge body is completed, the support of the bridge body is further strengthened.

[0049] When the bridge body is lifted again, the first guide block 21 and the second guide block 22 are bolted to the top of the support housing 11. Then, the second support block 33 is pushed through the second slide groove 331 by hand and one end of the second support block 33 is first locked between the first support block 32 and the bridge body. Then, the sliding conveying component 4 is aligned with the second support block 33. The conveying component 4 is then adjusted to push the second support block 33 to move along the length of the first support block 32. As the second support block 33 gradually moves closer to the center of the pier, the second locking block 61 is first squeezed into the second slide groove 331 under the action of the second guide surface 34. When the second locking groove 63 is aligned with the second locking groove 63, the second spring 62 drives the second locking block 61 to extend into the second locking groove 63, thereby fixing the second support block 33. At this time, the second support block 33 is completely stacked on the first support block 32, completing the installation of the second support block 33. After the bridge body is lifted again, the support function of the bridge body is further strengthened. Each time the bridge body is lifted, the first guide block 21 and the second guide block 22 are installed as needed, and then the second support block 33 is inserted. The sliding conveying component 4 is aligned with the newly inserted second support block 33, and the conveying component 4 pushes the newly inserted second support block 33 to overlap the previous second support block 33. Then, the second locking block 61 and the second locking groove 63 are used to fix the second support block 33. Through repeated operation, the first support block 32 and several second support blocks 33 provide permanent support for the bridge body. Finally, after the bridge pier is recast, the first support block 32 and several second support blocks 33 are embedded in the concrete, and the protruding guide rail 31 is cut off.

[0050] like Figure 2The conveying component 4 includes a mounting shell 41. Two T-shaped blocks 42 are mounted on the side of the mounting shell 41 facing the supporting shell 11. The T-shaped blocks 42 are flush with the top and bottom surfaces of the mounting shell 41. The supporting shell 11 has a first T-shaped groove 111 along its height direction, which penetrates the top surface of the supporting shell 11. A first guide block 21 and a second guide block 22 have a second T-shaped groove 24 through them along their respective height directions. Adjacent second T-shaped grooves 24 are interconnected and communicate with the first T-shaped groove 111. The T-shaped blocks 42 are adapted to the first T-shaped groove 111 and the second T-shaped groove 24 and can slide along the first T-shaped groove 111 and the second T-shaped groove 24. like Figure 7 , Figure 8 and Figure 9 A feed sleeve 43 is inserted inside the mounting shell 41. A rotating screw 44 is threaded through and connected to the feed sleeve 43. A limit bolt 45 is bolted to the mounting shell 41. A guide groove 431 is opened along the length of the feed sleeve 43. A limit groove 432 is opened along the circumference of the feed sleeve 43. The guide groove 431 and the limit groove 432 are connected. The end of the feed sleeve 43 away from the pier extends out of the mounting shell 41 and is fixed with a rotating handle 46.

[0051] T-block 42 slides along the first T-slot 111 and the second T-slot 24, thereby enabling the support housing 11 to slide along the height direction of the first guide block 21 and the second guide block 22. When it is necessary to position the support housing 11, it is only necessary to insert pads into the first T-slot 111 and the second T-slot 24 to restrict the downward sliding of the mounting housing 41, or the mounting housing 41 can be bolted to the support housing 11 to restrict the downward sliding of the mounting housing 41.

[0052] When one end of the first support block 32 is located between the bridge body and the guide rail 31, the sliding mounting shell 41 makes the rotating screw 44 face the first support block 32. Then, the handle 46 is used to rotate the feed sleeve 43 so that the limiting bolt 45 is located in the guide groove 431. Then, the feed sleeve 43 is pushed forward, and the feed sleeve 43 drives the rotating screw 44 to abut against the first support block 32. Then, the feed sleeve 43 is rotated so that the limiting bolt 45 is located in the limiting groove 432. The tool is used to drive the rotating bolt to rotate, so that the rotating screw 44 pushes the first support block 32 to move along the guide rail 31 and pushes the first support block 32 to the designated position. When one end of the second support block 33 is located between the bridge body and the guide rail 31, the sliding mounting shell 41 is moved upward so that the rotating screw 44 is facing the second support block 33. Then the mounting shell 41 is fixed to restrict its downward sliding. Then the above operation is repeated to make the rotating screw 44 push the second support block 33 along the top surface of the first support block 32 and push the second support block 33 to the designated position.

[0053] The implementation principle of this application embodiment is as follows: after the hydraulic jacking device performs hydraulic jacking, the jacking component 1 provides secondary support to the bridge body, and then the conveying component 4 conveys the permanent support component 3 between the bridge pier and the bridge body, so that the jacking component 1 and the permanent support component 3 jointly support the bridge body, strengthen the support effect of the bridge during jacking, and avoid the situation where the bridge body sinks or collapses due to the backflow of hydraulic oil after jacking.

[0054] This application also provides a bridge reinforcement method using a jacking device, which includes the following steps: S1. Install the hydraulic jacking device and support the bridge body, install the jacking assembly 1 and support the bridge body, install the conveying assembly 4, and cut the bridge piers; S2. The hydraulic jacking device lifts the bridge body, adjusts the height of the jacking component 1 to tighten the bottom of the bridge body, and the transmission component 4 pushes the permanent support component 3 to open between the pier and the bridge body for support. S3. Repeat steps S1 and S2 until the bridge body is lifted to the design height; S4. Carry out pier reinforcement, formwork and concrete pouring, and reconnect the piers and bridge body. S5. After the concrete reaches the design strength, first remove the hydraulic jacking device, then remove the top support component 1, and then remove the formwork and cut the permanent support component 3 that protrudes from the concrete.

[0055] In other embodiments, since the first support block 32 and the second support block 33 already provide permanent support for the bridge body, steps S4 and S5 can be adjusted as follows based on the lifting height of the bridge body and the bridge body's self-weight: S4. First, remove the hydraulic jacking device, then remove the jacking component 1, and then carry out the pier reinforcement, formwork and concrete pouring to reconnect the pier and the bridge body. S5. After the concrete reaches the design strength, remove the formwork and cut the permanent support components 3 that protrude from the concrete.

[0056] This adjustment provides construction workers with more space for formwork, rebar installation, and pouring, which helps to improve construction progress and the quality of rebar installation and formwork.

[0057] 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 jacking device for bridge reinforcement, characterized in that: The bridge includes a top support assembly (1), which works with a hydraulic jacking device to support the bridge. A permanent support assembly (3) is provided on the cross-section of the pier. A conveying assembly (4) is provided on the top support assembly (1) to convey the permanent support assembly (3) to the bridge pier and the bridge body. The heights of the top support assembly (1) and the permanent support assembly (3) can be adjusted according to the jacking height of the bridge. The top support assembly (1) includes a support housing (11), a support rod (12) is slidably disposed inside the support housing (11), the support rod (12) has a toothed groove (13) along its length direction, the support housing (11) is rotatably connected to a first gear (14), a second gear (15), a third gear (16) and a ratchet (17), the first gear (14) meshes with the toothed groove (13), the second gear (15) is coaxially disposed with the first gear (14), the third gear (16) meshes with the second gear (15), the ratchet (17) is coaxially disposed with the third gear (16), a ratchet tooth (18) is rotatably disposed inside the support housing (11), the ratchet tooth (18) meshes with the ratchet (17), and a rotating handle (113) for driving the rotating shaft of the third gear (16) to rotate is rotatably connected to the support housing (11). The supporting shell (11) is provided with a first slide rail (112), and a first guide block (21) and a second guide block (22) are installed on the top of the supporting shell (11). A second slide rail (23) is left between the first guide block (21) and the second guide block (22), and the first slide rail (112) is connected to the second slide rail (23). The permanent support assembly (3) includes a guide rail (31), which passes through the first slide rail (112) and is fixed to the cross-section of the pier. A first support block (32) is provided on the guide rail (31), and a first positioning element (5) for positioning the first support block (32) on the cross-section of the pier is provided on the guide rail (31). A plurality of second support blocks (33) are provided on the first support block (32), and adjacent second support blocks (33) are stacked on each other. Each second support block (33) is provided with a second positioning element (6), which is used to fix the second support block (33). The conveying assembly (4) is slidably disposed on the support housing (11). The conveying assembly (4) pushes the first support block (32) through the first slide rail (112) and pushes the second support block (33) through the second slide rail (23). The conveying assembly (4) includes a mounting shell (41) which is slidably disposed on the supporting shell (11). A feed sleeve (43) is provided through the mounting shell (41). A rotating screw (44) is threadedly connected to the feed sleeve (43). A limit bolt (45) is provided on the mounting shell (41). A guide groove (431) is provided on the feed sleeve (43) along its length direction. A limit groove (432) is provided on the feed sleeve (43) along its circumference. The guide groove (431) communicates with the limit groove (432). When the rotating screw (44) moves forward, the limit bolt (45) is located in the guide groove (431). The supporting shell (11) has a first T-slot (111) along its height direction, the first T-slot (111) penetrates the top surface of the supporting shell (11), the first guide block (21) and the second guide block (22) are each provided with a second T-slot (24) along their respective height directions, the second T-slot (24) communicates with the first T-slot (111), the mounting shell (41) is provided with a T-block (42), the T-block (42) is adapted to the first T-slot (111) and the second T-slot (24) and can slide along the first T-slot (111) and the second T-slot (24).

2. The bridge reinforcement lifting device according to claim 1, characterized in that: The end of the ratchet (18) away from the ratchet (17) is connected to a lever (110), and the end of the ratchet (18) near the ratchet (17) is rotatably connected to a pressure rod (19), which is rotatably connected to the support housing (11).

3. The bridge reinforcement jacking device according to claim 1, characterized in that: The first positioning component (5) includes a first snap-fit ​​block (51), the guide rail (31) is provided with a first groove (311), a first spring (52) is provided in the first groove (311), the first spring (52) is connected to the first snap-fit ​​block (51), the first snap-fit ​​block (51) is provided with a first guide surface (511), the first support block (32) always contacts the first guide surface (511) first when it moves toward the guide rail (31), the first snap-fit ​​block (51) is provided with a first snap-fit ​​groove (321), and the first snap-fit ​​block (51) is adapted to the first snap-fit ​​groove (321).

4. The bridge reinforcement jacking device according to claim 1, characterized in that: The second positioning member (6) includes a second snap-fit ​​block (61), the bottom surface of the second support block (33) is provided with a second sliding groove (331), a second spring (62) is provided in the second sliding groove (331), the second spring (62) is connected to the second snap-fit ​​block (61), the top surfaces of the first support block (32) and the second support block (33) are both provided with a second snap-fit ​​groove (63), and the second snap-fit ​​block (61) is adapted to its adjacent second snap-fit ​​groove (63).

5. The bridge reinforcement jacking device according to claim 1, characterized in that: After being fixed, the first support block (32) and the second support block (33) are provided with a second guide surface (34) at one end near the support housing (11), and the top surface of the first support block (32) and the second support block (33) are provided with a shock-absorbing elastic pad (35).

6. A jacking reinforcement method for bridge strengthening, characterized in that: Lifting and strengthening of bridges using the jacking device according to any one of claims 1-5 includes the following steps: S1. Install the hydraulic jacking device and hold the bridge body in place, install the jacking assembly (1) and hold the bridge body in place, install the conveying assembly (4), and cut the bridge pier; S2. The hydraulic jacking device lifts the bridge body, adjusts the height of the jacking component (1) to press against the bottom of the bridge body, and the transmission component (4) pushes the permanent support component (3) to open between the pier and the bridge body for support; S3. Repeat steps S1 and S2 until the bridge body is lifted to the design height; S4. Carry out pier reinforcement, formwork and concrete pouring, and reconnect the piers and bridge body. S5. After the concrete reaches the design strength, first remove the hydraulic jacking device, then remove the jacking component (1), then remove the formwork and cut the permanent support component (3) that protrudes from the concrete.

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