Jacking slope adjusting bridge prefabricated assembly type pier and construction method thereof

Abstract

The invention relates to a jacking slope-adjusting bridge prefabricated assembly type pier and a construction method thereof, and belongs to the technical field of bridge maintenance and reinforcement, the jacking slope-adjusting bridge prefabricated assembly type pier comprises a mounting platform, a sleeve is arranged on the mounting platform, the sleeve is used for being connected with a longitudinal steel bar for dismantling the pier in a sleeving mode, and the sleeve is slidably arranged on the mounting platform; the sliding direction of the sleeve is parallel to the length direction of the longitudinal reinforcing steel bar, a polishing assembly and a tapping assembly are arranged in the sleeve, the polishing assembly is used for polishing cement on the longitudinal reinforcing steel bar, and the tapping assembly is used for restoring a threaded section on the longitudinal reinforcing steel bar. The effect of improving the stability of the assembled pier is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of bridge maintenance and reinforcement, and in particular to a prefabricated assembled pier for a jacking and slope adjustment bridge and a construction method thereof. Background Art

[0002] In the process of urban three-dimensional transportation construction, when it involves the same line with existing bridges, in order to avoid waste of resources, it is often necessary to lift and adjust the slope of the existing bridges for reuse. Bridge lifting and slope adjustment projects, especially the lifting and slope adjustment of cast-in-place integral box girders, often have the characteristics of large lifting weight, complex lifting control system, large difference in the posture of the beam before and after lifting and slope adjustment, and high construction safety risk. Among them, safety during the construction process is often the focus of attention, especially for the need to chisel and redo the lower structure and "change the platform into pier" after the bridge is lifted. Not only is the safety risk of underbridge construction high, but the construction difficulty increases due to limited space and cast-in-place concrete during the entire construction process, which will also significantly affect the construction period. With the development of construction industrialization, prefabricated bridge structures have developed rapidly, with advantages such as fast construction speed and guaranteed construction quality.

[0003] At present, the patent document with authorization announcement number CN113981810B discloses a prefabricated assembled pier for a jacking and slope adjustment bridge and its construction method. In the bridge jacking and slope adjustment project, the original piers with insufficient height are removed, and the new piers are prefabricated and assembled. By setting a working platform and a movable track in the transverse direction of the bridge, the new prefabricated piers are installed and positioned, and connected with the reserved longitudinal steel bars in the original piers through a grouting sleeve. This method can greatly shorten the construction time and later maintenance time of the traditional cast-in-place piers under the bridge after the bridge jacking is completed, and reduce the safety risks of the long-term jacking support system.

[0004] However, when the sleeve chisel head is used to remove the cement attached to the longitudinal steel bars, the cement on the longitudinal steel bars cannot be removed well, and the longitudinal steel bars are usually made of threaded steel bars. The threads on the surface of the threaded steel bars can increase the contact area with the concrete and the bonding effect, but the cement that is difficult to remove covers the longitudinal steel bars, resulting in a relatively general bonding effect between the longitudinal steel bars and the grouting sleeve, which in turn leads to a relatively general stability of the assembled bridge piers. Summary of the invention

[0005] In order to improve the stability of assembled bridge piers, the present application provides a prefabricated assembled bridge pier for a jacking and slope adjustment bridge and a construction method thereof.

[0006] In the first aspect, the present application provides a prefabricated pier for a jacking and slope-adjusting bridge and a construction method thereof, which adopts the following technical solution: A prefabricated assembled pier for a jacking and slope-adjusting bridge comprises an installation platform, a sleeve is arranged on the installation platform, the sleeve is used for sleeve-engaging the longitudinal reinforcement of the dismantled pier, the sleeve is slidably arranged on the installation platform, the sliding direction of the sleeve is parallel to the length direction of the longitudinal reinforcement, a grinding assembly and a tapping assembly are arranged in the sleeve, the grinding assembly is used for grinding cement on the longitudinal reinforcement, and the tapping assembly is used for restoring the threaded section on the longitudinal reinforcement.

[0007] Optionally, the sleeve includes a first sleeve and a second sleeve, the first sleeve and the second sleeve are coaxial, the first sleeve is located below the second sleeve, the grinding assembly is located in the first sleeve, and the tapping assembly is located in the second sleeve. When the sleeve is sleeved with the longitudinal steel bar, the first sleeve first sleeves the longitudinal steel bar and grinds the cement on the longitudinal steel bar through the grinding assembly. When the sleeve slides and drives the second sleeve to sleeve the longitudinal steel bar, the tapping assembly restores the threaded section on the longitudinal steel bar.

[0008] Optionally, a mounting plate is provided on the mounting platform, the mounting plate is perpendicular to the mounting platform, a mounting rod is provided on the mounting plate, the mounting rod is parallel to the mounting platform, two layers of fixed plates are provided at the end of the mounting rod, the first sleeve and the second sleeve are respectively provided on the fixed plates, the grinding assembly includes a grinding wheel arranged in the first sleeve, the grinding wheel is located on one side of the longitudinal steel bar, the grinding wheel is rotatably arranged in the first sleeve, the rotation axis of the grinding wheel is parallel to the axial direction of the first sleeve, and the grinding assembly also includes a first motor arranged in the first sleeve for driving the grinding wheel to rotate.

[0009] Optionally, a plurality of grinding wheels are provided and arranged along the axial direction of the first sleeve, and the diameter of the grinding wheel gradually increases from the first sleeve to the second sleeve to grind the cement on the longitudinal steel bars.

[0010] Optionally, the grinding wheel is conical and the side of the grinding wheel faces the longitudinal steel bars.

[0011] Optionally, the tapping assembly includes an arc-shaped plate arranged in the second sleeve, the arc-shaped plate is located on one side of the longitudinal steel bar and its length is parallel to the axial direction of the second sleeve, the concave surface of the arc-shaped plate faces the longitudinal steel bar, the concave surface of the arc-shaped plate is provided with a plurality of convex strips, the plurality of convex strips are arranged along the length direction of the arc-shaped plate, the convex strips are used to abut against cement between the threaded sections of the longitudinal steel bars, the second sleeve is rotatably arranged on the fixed plate, and the tapping assembly also includes a driving member for driving the second sleeve to rotate and driving the convex strips to rotate to grind the abutting cement.

[0012] Optionally, the driving member includes a second motor disposed on the fixed plate, the second motor is located on one side of the second sleeve, and mutually meshing gears are respectively disposed on the output shaft of the second motor and the second sleeve.

[0013] Optionally, along the direction from the first sleeve to the second sleeve, the height of the convex strip gradually increases and the distance between the convex strip and the longitudinal steel bar is shortened.

[0014] Optionally, the mounting rod is a telescopic rod, and the telescopic direction of the mounting rod is perpendicular to the mounting plate.

[0015] In the second aspect, the present application provides a construction method for prefabricated and assembled piers of a jacking and slope-adjusting bridge, which adopts the following technical scheme: Optionally, a construction method for a prefabricated and assembled pier of a jacking and slope-adjusting bridge, used for constructing a prefabricated and assembled pier of a jacking and slope-adjusting bridge, further includes: S1: The original bridge piers are removed and the longitudinal reinforcement is exposed. The installation platform is sleeved on the longitudinal reinforcement. At this time, the sleeve is located above the longitudinal reinforcement. S2: The sleeve moves toward the longitudinal steel bar and sleeves the longitudinal steel bar. At this time, the grinding assembly and the tapping assembly act on the longitudinal steel bar respectively; S3: The grinding assembly is used to grind the cement on the longitudinal steel bars, and the tapping assembly is used to restore the threaded sections on the longitudinal steel bars. After the surface treatment of the longitudinal steel bars is completed, the prefabricated bridge piers are hoisted onto the longitudinal steel bars and lowered. The grouting sleeves on the prefabricated bridge piers are sleeved onto the longitudinal steel bars and then grouting is completed; S4: Build a formwork at the joints between the original piers and the prefabricated piers. The formwork surrounds the piers and concrete is poured inside the formwork. After the concrete reaches the designed strength, the original piers and the prefabricated piers are connected.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. After the original bridge piers are removed and the longitudinal steel bars are exposed, the installation platform is sleeved on the longitudinal steel bars. At this time, the sleeve is located above the longitudinal steel bars. Then the installation platform is slid to drive the sleeve to sleeve the longitudinal steel bars. After the longitudinal steel bars are sleeved in the sleeve, the cement on the longitudinal steel bars is first grinded by the grinding assembly to reduce the thickness of the cement layer. Then the tapping assembly is used to act on the longitudinal steel bars to expose the threaded sections on the longitudinal steel bars. Then the prefabricated bridge piers are installed on the longitudinal steel bars. Because the threaded sections on the longitudinal steel bars are exposed, the combination of the longitudinal steel bars and the grouting sleeves is excellent, thereby improving the stability of the bridge pier connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a prefabricated and assembled pier installation structure for a jacking and slope-adjusting bridge according to an embodiment of the present application; Figure 2 This is a schematic diagram of the overall structure of a prefabricated and assembled pier for a jacking and slope-adjusting bridge according to an embodiment of the present application; Figure 3It is a cross-sectional view of a sleeve in a prefabricated assembled pier of a jacking and slope-adjusting bridge according to an embodiment of the present application; Figure 4 yes Figure 3 A partial enlarged schematic diagram is shown in the figure.

[0018] Description of reference numerals: 1, mounting platform; 2, through hole; 3, sleeve; 31, first sleeve; 32, second sleeve; 4, longitudinal reinforcement; 5. grinding assembly; 51. grinding wheel; 52. first motor; 6. Tapping assembly; 61. Arc plate; 62. Raised strip; 63. Second motor; 64. Gear; 7. Mounting plate; 8. Mounting rod; 9. Fixing plate; 10. Connecting plate; 11. Screw rod; 12. Driving motor; 13. Electric push rod. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-4 This application is described in further detail.

[0020] The present application embodiment discloses a prefabricated pier for a jacking and slope-adjusting bridge. Figure 1 and Figure 2 The prefabricated pier of the jacking and slope-adjusting bridge comprises an installation platform 1, in which a through hole 2 is opened. After the original pier is removed, the bottom of the original pier is located in the through hole 2. In the embodiment of the present application, a sleeve 3 is provided on the installation platform 1, and the sleeve 3 is used to sleeve the longitudinal steel bar 4 of the removed pier. The sleeve 3 is slidably arranged on the installation platform 1, and the sliding direction of the sleeve 3 is parallel to the length direction of the longitudinal steel bar 4; Combination Figure 3 A grinding assembly 5 and a tapping assembly 6 are arranged in the sleeve 3. The grinding assembly 5 is used to grind the cement on the longitudinal steel bar 4, and the tapping assembly 6 is used to restore the threaded section on the longitudinal steel bar 4.

[0021] After the original bridge piers are dismantled and the longitudinal steel bars 4 are exposed, the installation platform 1 is sleeved on the longitudinal steel bars 4. At this time, the sleeve 3 is located above the longitudinal steel bars 4. The installation platform 1 is then slid to drive the sleeve 3 to sleeve on the longitudinal steel bars 4. After the longitudinal steel bars 4 are sleeved in the sleeve 3, the cement on the longitudinal steel bars 4 is first grinded by the grinding component 5 to reduce the thickness of the cement layer, and then the tapping component 6 is used to act on the longitudinal steel bars 4 to expose the threaded sections on the longitudinal steel bars 4. Then the prefabricated bridge piers are installed on the longitudinal steel bars 4. Because the threaded sections on the longitudinal steel bars 4 are exposed, the combination effect of the longitudinal steel bars 4 and the grouting sleeve 3 is relatively excellent, thereby improving the stability of the bridge pier connection.

[0022] Reference Figure 2 , Figure 3 and Figure 4In the embodiment of the present application, the sleeve 3 includes a first sleeve 31 and a second sleeve 32, the first sleeve 31 and the second sleeve 32 are coaxially connected, the first sleeve 31 is located below the second sleeve 32, the grinding assembly 5 is located in the first sleeve 31, and the tapping assembly 6 is located in the second sleeve 32. When the sleeve 3 is sleeved with the longitudinal steel bar 4, the first sleeve 31 first sleeves the longitudinal steel bar 4 and grinds the cement on the longitudinal steel bar 4 through the grinding assembly 5. When the sleeve 3 slides and drives the second sleeve 32 to sleeve the longitudinal steel bar 4, the tapping assembly 6 restores the threaded section on the longitudinal steel bar 4. By arranging the grinding assembly 5 and the tapping assembly 6 in the first sleeve 31 and the second sleeve 32 respectively, the longitudinal steel bar 4 can be directly tapped after grinding, thereby improving the processing efficiency of the longitudinal steel bar 4, and further improving the construction efficiency of the bridge pier.

[0023] Reference Figure 2 , Figure 3 and Figure 4 In the embodiment of the present application, a mounting plate 7 is provided on the mounting platform 1, and the mounting plate 7 is perpendicular to the mounting platform 1. A mounting rod 8 is provided on the mounting plate 7, and the mounting rod 8 is parallel to the mounting platform 1 and perpendicular to the mounting plate 7. The mounting rod 8 is slidably arranged on the mounting plate 7, and the mounting rod 8 slides along the length direction parallel to the mounting plate 7. Two layers of fixed plates 9 are provided at the end of the mounting rod 8, and the two layers of fixed plates 9 are fixedly connected by a connecting plate 10, and the connecting plate 10 is fixedly arranged at the end of the mounting rod 8. The first sleeve 31 and the second sleeve 32 are respectively arranged on the fixing plate 9. The grinding assembly 5 includes a grinding wheel 51 arranged in the first sleeve 31. Further, the first sleeve 31 is fixedly arranged on the fixing plate 9, and the grinding wheel 51 is located on one side of the longitudinal steel bar 4. The grinding wheel 51 is rotatably arranged in the first sleeve 31, and the rotation axis of the grinding wheel 51 is parallel to the axial direction of the first sleeve 31. The grinding assembly 5 also includes a first motor 52 arranged in the first sleeve 31 for driving the grinding wheel 51 to rotate.

[0024] The mounting rod 8 slides on the mounting plate 7 and drives the sleeve 3 to slide, so that the first sleeve 31 is sleeved on the longitudinal steel bar 4. Then, the first motor 52 drives the grinding wheel 51 to rotate. The grinding wheel 51 rotates to grind the cement on the longitudinal steel bar 4, so that the longitudinal steel bar 4 is exposed. The operation is simple and convenient. At the same time, the sleeve 3 slides along the longitudinal steel bar 4, which makes it easy to grind the cement on the longitudinal steel bar 4.

[0025] Reference Figure 2As shown in the figure, in the embodiment of the present application, a screw 11 is rotatably provided on the mounting plate 7, the length direction and the rotation axis of the screw 11 are parallel to the mounting plate 7, the mounting rod 8 is threadedly connected to the screw 11 and the end of the mounting rod 8 abuts against the mounting plate 7, a driving motor 12 is fixedly provided on the mounting plate 7, and the screw 11 is coaxially provided on the output shaft of the driving motor 12; start the driving motor 12, the driving motor 12 drives the screw 11 to rotate, the rotation of the screw 11 drives the mounting rod 8 to slide, and the sliding of the mounting rod 8 drives the sleeve 3 to slide, and the operation is simple and convenient.

[0026] Reference Figure 4 In order to improve the grinding effect of the grinding wheel 51 on the longitudinal steel bars 4, a plurality of grinding wheels 51 are provided and arranged along the axial direction of the first sleeve 31. Along the direction from the first sleeve 31 to the second sleeve 32, the diameter of the grinding wheel 51 gradually increases to grind the cement on the longitudinal steel bars 4; the diameter of the grinding wheel 51 gradually increases, so that the grinding wheel 51 gradually approaches the longitudinal steel bars 4 and grinds the cement attached to the longitudinal steel bars 4, thereby improving the removal effect of the cement, and thereby improving the grinding effect on the longitudinal steel bars 4.

[0027] Reference Figure 4 In order to facilitate the grinding wheel 51 to grind the longitudinal steel bar 4, the grinding wheel 51 is conical and the side of the grinding wheel 51 faces the longitudinal steel bar 4; the grinding wheel 51 is conical to facilitate the contact between the grinding wheel 51 and the cement, thereby facilitating the grinding of the cement.

[0028] Reference Figure 2 and Figure 4 In the embodiment of the present application, the tapping assembly 6 includes an arc-shaped plate 61 arranged in the second sleeve 32. The arc-shaped plate 61 is located on one side of the longitudinal steel bar 4 and its length is parallel to the axial direction of the second sleeve 32. The concave surface of the arc-shaped plate 61 faces the longitudinal steel bar 4. The concave surface of the arc-shaped plate 61 is provided with a plurality of convex strips 62. The cross section of the convex strips 62 is triangular. The plurality of convex strips 62 are arranged along the length direction of the arc-shaped plate 61. The convex strips 62 are used to abut against the cement between the threaded sections of the longitudinal steel bar 4. The second sleeve 32 is rotatably arranged on the fixed The plate 9 is rotatably connected with the first sleeve 31, and the tapping assembly 6 also includes a driving member for driving the second sleeve 32 to rotate and drive the convex strip 62 to rotate to grind the abutting cement; when the second sleeve 32 is sleeved with the longitudinal steel bar 4, the sleeve 3 is driven to rotate by the driving member, and the sleeve 3 rotates to drive the arc plate 61 to rotate, and the arc plate 61 rotates to drive the convex strip 62 to rotate and act on the cement, so that the cement between the threaded sections of the longitudinal steel bar 4 gradually becomes thinner, and the threaded sections on the longitudinal steel bar 4 are restored, and the operation is simple and convenient.

[0029] Reference Figure 2 and Figure 4Furthermore, the driving member includes a second motor 63 arranged on the fixed plate 9, the second motor 63 is located on one side of the second sleeve 32, and gears 64 meshing with each other are respectively arranged on the output shaft of the second motor 63 and the second sleeve 32; the second motor 63 is started, the second motor 63 drives the gear 64 to rotate, and the gear 64 is transmitted to the second sleeve 32 to drive the second sleeve 32 to rotate, and the operation is simple and convenient.

[0030] Reference Figure 2 and Figure 4 In the embodiment of the present application, along the direction from the first sleeve 31 to the second sleeve 32, the height of the protrusion 62 gradually increases and the distance between the protrusion 62 and the longitudinal steel bar 4 is shortened; the height of the protrusion 62 gradually increases, which facilitates the contact between the protrusion 62 and the cement and facilitates the tapping of the cement.

[0031] Reference Figure 2 In order to facilitate the adjustment of the position of the sleeve 3 and the grinding of the longitudinal steel bars 4, the mounting rod 8 is a telescopic rod, and the telescopic direction of the mounting rod 8 is perpendicular to the mounting plate 7. Furthermore, an electric push rod 13 is provided on the mounting rod 8. The position of the mounting rod 8 is adjusted by the electric push rod 13, which facilitates the adjustment of the position of the sleeve 3, thereby facilitating the sleeve connection of the longitudinal steel bars 4 at various locations.

[0032] The implementation principle of the prefabricated pier of the jacking and slope-adjusting bridge in the embodiment of the present application is as follows: After the original bridge piers are dismantled and the longitudinal steel bars 4 are exposed, the installation platform 1 is sleeved on the longitudinal steel bars 4. At this time, the sleeve 3 is located above the longitudinal steel bars 4. The installation platform 1 is then slid to drive the sleeve 3 to sleeve on the longitudinal steel bars 4. After the longitudinal steel bars 4 are sleeved in the sleeve 3, the cement on the longitudinal steel bars 4 is first grinded by the grinding component 5 to reduce the thickness of the cement layer, and then the tapping component 6 is used to act on the longitudinal steel bars 4 to expose the threaded sections on the longitudinal steel bars 4. Then the prefabricated bridge piers are installed on the longitudinal steel bars 4. Because the threaded sections on the longitudinal steel bars 4 are exposed, the combination effect of the longitudinal steel bars 4 and the grouting sleeve 3 is relatively excellent, thereby improving the stability of the bridge pier connection.

[0033] The embodiment of the present application discloses a construction method for lifting a prefabricated and assembled pier of a slope-adjusting bridge, which is used for lifting a prefabricated and assembled pier of a slope-adjusting bridge, and further includes: S1: The original bridge pier is removed to expose the longitudinal steel bar 4, and the installation platform 1 is sleeved on the longitudinal steel bar 4. At this time, the sleeve 3 is located above the longitudinal steel bar 4; S2: The sleeve 3 moves toward the longitudinal steel bar 4 and sleeves the longitudinal steel bar 4. At this time, the grinding assembly 5 and the tapping assembly 6 act on the longitudinal steel bar 4 respectively; S3: The grinding assembly 5 is used to grind the cement on the longitudinal steel bar 4, and the tapping assembly 6 is used to restore the threaded section on the longitudinal steel bar 4. After the surface treatment of the longitudinal steel bar 4 is completed, the prefabricated bridge pier is hoisted onto the longitudinal steel bar 4 and dropped down. The grouting sleeve 3 on the prefabricated bridge pier is sleeved on the longitudinal steel bar 4 and then the grouting is completed; S4: Build a formwork at the joints between the original piers and the prefabricated piers. The formwork surrounds the piers and concrete is poured inside the formwork. After the concrete reaches the designed strength, the original piers and the prefabricated piers are connected.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A prefabricated pier for a jacking and slope-adjusting bridge, characterized in that: The invention comprises an installation platform (1), wherein a sleeve (3) is arranged on the installation platform (1), wherein the sleeve (3) is used for sleeve-engaging a longitudinal steel bar (4) of a dismantled bridge pier, wherein the sleeve (3) is slidably arranged on the installation platform (1), wherein the sliding direction of the sleeve (3) is parallel to the length direction of the longitudinal steel bar (4), wherein a grinding component (5) and a tapping component (6) are arranged in the sleeve (3), wherein the grinding component (5) is used for grinding cement on the longitudinal steel bar (4), and wherein the tapping component (6) is used for restoring the threaded section on the longitudinal steel bar (4).

2. The prefabricated pier for a jacking and slope-adjusting bridge according to claim 1 is characterized by: The sleeve (3) comprises a first sleeve (31) and a second sleeve (32), the first sleeve (31) and the second sleeve (32) are coaxial, the first sleeve (31) is located below the second sleeve (32), the grinding assembly (5) is located in the first sleeve (31), and the tapping assembly (6) is located in the second sleeve (32). When the sleeve (3) is sleeved with the longitudinal steel bar (4), the first sleeve (31) is first sleeved with the longitudinal steel bar (4) and the cement on the longitudinal steel bar (4) is grinded by the grinding assembly (5). When the sleeve (3) slides and drives the second sleeve (32) to sleeve the longitudinal steel bar (4), the tapping assembly (6) restores the threaded section on the longitudinal steel bar (4).

3. The prefabricated pier for a jacking and slope-adjusting bridge according to claim 2 is characterized by: The mounting platform (1) is provided with a mounting plate (7), the mounting plate (7) being perpendicular to the mounting platform (1), the mounting plate (7) being provided with a mounting rod (8), the mounting rod (8) being parallel to the mounting platform (1), the end of the mounting rod (8) being provided with two layers of fixing plates (9), the first sleeve (31) and the second sleeve (32) being respectively arranged on the fixing plates (9), the grinding assembly (5) comprising a grinding wheel (51) arranged in the first sleeve (31), the grinding wheel (51) being located on one side of the longitudinal steel bar (4), the grinding wheel (51) being rotatably arranged in the first sleeve (31), the rotation axis of the grinding wheel (51) being parallel to the axial direction of the first sleeve (31), the grinding assembly (5) further comprising a first motor (52) arranged in the first sleeve (31) for driving the grinding wheel (51) to rotate.

4. The prefabricated pier for a jacking and slope-adjusting bridge according to claim 3 is characterized by: The grinding wheels (51) are provided in plurality and are arranged along the axial direction of the first sleeve (31). Along the direction from the first sleeve (31) to the second sleeve (32), the diameter of the grinding wheels (51) gradually increases to grind the cement on the longitudinal steel bars (4).

5. The prefabricated pier for a jacking and slope-adjusting bridge according to claim 3 is characterized by: The grinding wheel (51) is in a cone shape and the side surface of the grinding wheel (51) faces the longitudinal steel bar (4).

6. The prefabricated pier for a jacking and slope-adjusting bridge according to claim 2 is characterized by: The tapping assembly (6) comprises an arc-shaped plate (61) arranged in the second sleeve (32), the arc-shaped plate (61) is located on one side of the longitudinal steel bar (4) and its length is parallel to the axial direction of the second sleeve (32), the concave surface of the arc-shaped plate (61) faces the longitudinal steel bar (4), the concave surface of the arc-shaped plate (61) is provided with a plurality of convex strips (62), the plurality of convex strips (62) are arranged along the length direction of the arc-shaped plate (61), the convex strips (62) are used to abut against cement between the threaded sections of the longitudinal steel bar (4), the second sleeve (32) is rotatably arranged on the fixed plate (9), and the tapping assembly (6) further comprises a driving member for driving the second sleeve (32) to rotate so as to drive the convex strips (62) to rotate and grind the abutting cement.

7. The prefabricated pier for a jacking and slope-adjusting bridge according to claim 6 is characterized by: The driving member comprises a second motor (63) arranged on a fixed plate (9), the second motor (63) being located on one side of the second sleeve (32), and mutually meshing gears (64) being respectively arranged on an output shaft of the second motor (63) and on the second sleeve (32).

8. The prefabricated pier for a jacking and slope-adjusting bridge according to claim 6 is characterized by: Along the direction from the first sleeve (31) to the second sleeve (32), the height of the convex strip (62) gradually increases, thereby shortening the distance between the convex strip (62) and the longitudinal steel bar (4).

9. The prefabricated pier for a jacking and slope-adjusting bridge according to claim 2 is characterized by: The installation rod (8) is a telescopic rod, and the telescopic direction of the installation rod (8) is perpendicular to the installation plate (7).

10. A construction method for a prefabricated pier for a jacking and slope-adjusting bridge, used for constructing the prefabricated pier for a jacking and slope-adjusting bridge as claimed in claim 1, characterized in that: Also includes; S1: The original bridge pier is removed to expose the longitudinal steel bar (4), and the installation platform (1) is sleeved on the longitudinal steel bar (4), and the sleeve (3) is located above the longitudinal steel bar (4); S2: The sleeve (3) moves toward the longitudinal steel bar (4) and sleeves the longitudinal steel bar (4). At this time, the grinding assembly (5) and the tapping assembly (6) act on the longitudinal steel bar (4) respectively; S3: The grinding assembly (5) is used to grind the cement on the longitudinal steel bar (4), and the tapping assembly (6) is used to restore the threaded section on the longitudinal steel bar (4). After the surface treatment of the longitudinal steel bar (4) is completed, the prefabricated bridge pier is hoisted onto the longitudinal steel bar (4) and lowered. The grouting sleeve (3) on the prefabricated bridge pier is sleeved on the longitudinal steel bar (4) and then grouting is completed; S4: Build a formwork at the joints between the original piers and the prefabricated piers. The formwork surrounds the piers and concrete is poured inside the formwork. After the concrete reaches the designed strength, the original piers and the prefabricated piers are connected.

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