In-situ reinforcement device and construction method for settlement of existing bridges

Abstract

This application relates to the field of in-situ reinforcement of bridges, and particularly to an in-situ reinforcement device and construction method for settlement of existing bridges. The reinforcement device includes a support plate and a jacking member. The jacking member is connected to the top surface of the support plate. The side of the jacking member away from the support plate abuts against the bottom surface of the bridge body, and the mutually approaching surfaces of the support plates abut against the bridge piers; a fixing mechanism for fixing the support plate to the soil is provided on the bottom surface of the support plate. The fixing mechanism includes a drill rod. The drill rod is arranged to be lifted and rotated on the support plate. A lifting groove for the drill rod to lift is opened on the bottom surface of the support plate. The drill rod can rise to be completely located within the support plate, and the drill rod can also descend to drill into the soil; a connecting plate is detachably connected between the support plates. The construction method successively includes fixing the connecting plate and fixing the jacking member. This application has the effects of facilitating construction and facilitating disassembly and reuse.

Description

Technical Field

[0001] This application relates to the field of in-situ reinforcement of bridges, and in particular to an in-situ reinforcement device and construction method for settlement of existing bridges. Background Art

[0002] As an important part of road administration and traffic infrastructure, bridges are widely used in various traffic scenarios. For example, overpasses in urban traffic, bridges for crossing mountains, and cross-sea bridges. A bridge usually consists of a bridge body and bridge piers for supporting the bridge body.

[0003] With the development of the economy, transportation has become more and more convenient, and the construction of subways has become more and more mature. However, the excavation of deep foundation pits of subway stations is likely to cause the settlement of surrounding buildings, and there is a settlement situation for bridges located around subway stations, which affects the stability of the bridges. Therefore, there have been projects to reinforce bridges.

[0004] In the related art, the bridge reinforcement device includes support piles and jacks. During construction, holes are drilled at corresponding positions on the roadbed surface first, and then the support piles are fixed around the bridge piers by grouting. Before installing the support piles, concrete needs to be poured into the support piles first, and then the jacks are fixed on the top surfaces of the support piles. The staff regularly monitors whether the bridge settles and the settlement amount, and uses the jacking effect of the jacks to lift the bridge to reduce the settlement of the bridge.

[0005] Regarding the above related art, the inventor believes that when installing the support piles, it is necessary to drill holes first and then pour concrete to fix the support piles, the operation is complex, and when the bridge is demolished during road reconstruction, the above reinforcement device is difficult to disassemble and reuse. Summary of the Invention

[0006] In order to solve the above technical problems, this application provides an in-situ reinforcement device and construction method for settlement of existing bridges.

[0007] In a first aspect, an in-situ reinforcement device for settlement of existing bridges provided by this application adopts the following technical solution:

[0008] An in-situ reinforcement device for settlement of existing bridges includes a support plate and a jacking member. The jacking member is connected to the top surface of the support plate. The side of the jacking member away from the support plate abuts against the bottom surface of the bridge body. The support plates are arranged on both sides of the pier in the radial direction relatively, and the mutually approaching surfaces of the support plates abut against the pier.

[0009] A fixing mechanism for fixing the support plate to the soil is provided on the bottom surface of the support plate. The fixing mechanism includes a drill rod, which is arranged to be lifted and rotated on the support plate. A lifting groove for the drill rod to lift is formed on the bottom surface of the support plate. The drill rod can rise to be completely located inside the support plate, and the drill rod can also descend to drill into the soil. The fixing mechanism further includes a lifting assembly for driving the drill rod to lift and a rotating assembly for driving the drill rod to rotate. A receiving chamber for accommodating the lifting assembly and the rotating assembly is provided inside the support plate, and the receiving chamber communicates with the lifting groove.

[0010] By adopting the above technical solution, when installing the reinforcement device, the support plate is moved to a suitable position by a crane, and then the support plate is corrected to be vertical by an auxiliary construction tool. Then, the rotating assembly and the lifting assembly cooperate to drive the drill rod to rotate while descending, so that the drill rod is fixed in the soil, thereby fixing and installing the support plate. Then, the jacking member is installed on the top of the support plate, and finally, the top of the jacking member is driven to abut against the bottom surface of the bridge body, which is convenient to operate; when the reinforcement device needs to be disassembled, the drill rod is driven to rise to the reset position by the lifting assembly, and then the support plate can be removed and reused in other places for bridge reinforcement.

[0011] Optionally, a plurality of drill rods are arranged in the length direction of the support plate, and the plurality of drill rods are symmetrically arranged with respect to the midline in the length direction of the support plate. The drill rod includes a rod body and a drill bit connected to each other, and the drill bit is farther away from the bridge body than the rod body;

[0012] The lifting assembly includes a motor, a screw rod, a slider, and a guide rod. The output shaft of the motor is connected to a transmission shaft. One drill rod corresponds to one screw rod and one slider; the transmission shaft is connected to a plurality of screw rods simultaneously through a first synchronization component to drive the plurality of screw rods to rotate synchronously; the slider is rotatably connected to the end of the drill rod away from the drill bit. A limiting plate is connected to the surface of the slider close to the drill rod through a connecting column. The end surfaces of the connecting column and the limiting plate are both circular, and the diameter of the limiting plate is larger than the diameter of the connecting column. A connecting groove for the connecting column to be clamped is formed on the surface of the rod body away from the drill bit, and a limiting groove for the limiting plate to be clamped is formed on the inner wall of the connecting groove on the side away from the slider. When the drill rod rotates, the limiting plate rotates in the limiting groove;

[0013] The screw rod penetrates into the corresponding slider and is threadedly connected to the corresponding slider. One end of the guide rod is connected to the inner wall of the receiving chamber, and the other end of the guide rod penetrates into the slider and is slidably connected to the slider. A sliding groove for the guide rod to slide is formed on the top surface of the slider.

[0014] By adopting the above technical solution, since the limiting plate is clamped in the limiting groove and the end surfaces of the connecting column and the limiting plate are both circular, the rotation of the drill rod does not affect the lifting of the slider, and the slider drives the drill rod to lift when the slider lifts;

[0015] When driving the drill pipe to descend, start the motor to rotate forward, drive the transmission shaft to rotate forward. The transmission shaft drives multiple screw rods to rotate synchronously forward through the first synchronous component. Under the limitation of the guide rod, the forward rotation of the screw rod drives the slider to descend, thereby driving the drill pipe to descend;

[0016] When driving the drill pipe to ascend, start the motor to rotate reversely, drive the rotating shaft to rotate reversely. The transmission shaft drives multiple screw rods to rotate synchronously reversely through the first synchronous component. Under the limitation of the guide rod, the reverse rotation of the screw rod drives the slider to ascend, thereby driving the drill pipe to ascend.

[0017] Optionally, one drill pipe corresponds to a set of rotating components. The rotating components include a rotating ring plate, a limiting block and a positioning ring plate. The rotating ring plate is sleeved on the corresponding drill pipe body. The limiting blocks are connected to the two radial sides of the peripheral side wall of the rod body. A limiting vertical groove for the limiting block to slide is vertically opened on the inner wall of the rotating ring plate. When the drill pipe ascends and descends, the limiting block slides in the limiting vertical groove;

[0018] The length of the rotating ring plate is greater than that of the positioning ring plate. The positioning ring plate is coaxially arranged on the peripheral side wall of the rotating ring plate. A positioning ring groove for the positioning ring plate to be clamped is opened on the peripheral side wall of the rotating ring plate. A fixing rod is connected to the positioning ring plate. One end of the fixing rod far from the positioning ring plate is connected to the inner wall of the accommodating chamber;

[0019] The transmission shaft is simultaneously connected to multiple rotating ring plates through the second synchronous component to drive the multiple rotating ring plates to rotate synchronously.

[0020] By adopting the above technical solution, since the limiting block slides in the limiting vertical groove, the drill pipe can rotate while ascending and descending. When driving the drill pipe to rotate, drive the transmission shaft to rotate. The transmission shaft drives multiple rotating ring plates to rotate through the second synchronous component. The rotating ring plate drives the drill pipe to rotate under the action of the limiting block.

[0021] Optionally, the first synchronous component includes a first driving wheel, a first driven wheel and a first synchronous belt. The first driving wheel is coaxially connected to the transmission shaft. One screw rod corresponds to one first driven wheel. The first driven wheel is coaxially connected to the corresponding screw rod. The inner wall of the first synchronous belt is simultaneously in contact with the first driving wheel and multiple first driven wheels.

[0022] By adopting the above technical solution, the transmission shaft drives the first driving wheel to rotate. The first driving wheel drives multiple first driven wheels to rotate synchronously through the first synchronous belt. Thus, the transmission shaft drives multiple screw rods to rotate synchronously, and saves the installation space of the motor and reduces the energy consumption.

[0023] Optionally, the second synchronization component includes a second driving wheel, a second driven wheel, and a second synchronous belt. The second driving wheel is coaxially connected to the transmission shaft. One rotating ring plate corresponds to one second driven wheel. The second driven wheel is coaxially connected to the corresponding rotating ring plate. The inner wall of the second synchronous belt abuts against the second driving wheel and multiple second driven wheels simultaneously.

[0024] By adopting the above technical solution, the transmission shaft drives the second driving wheel to rotate. The second driving wheel drives multiple second driven wheels to rotate synchronously through the second synchronous belt. Thus, the transmission shaft drives multiple rotating ring plates to rotate synchronously, saving the installation space of the motor and further reducing the energy consumption.

[0025] Optionally, a support rod is slidably arranged on the drill bit. One end of the support rod away from the drill rod is conical. The support rod is inclined and slides along the inclined direction. An installation chamber is arranged in the drill rod. The installation chamber extends from the rod body to the drill bit. A sliding hole for the support rod to slide out is formed on the circumferential side wall of the drill bit. The sliding hole is inclined and adapted to the inclination degree of the support rod. A first return spring is arranged on the support rod. The first return spring applies a force to the support rod to make the support rod face towards the inside of the drill bit.

[0026] The support rod can slide out of the drill bit and insert into the soil, or can also slide to be completely located inside the drill bit. A driving component for driving the support rod to slide is arranged in the installation chamber. After the drill rod is inserted into the soil, the support rod is inserted into the soil.

[0027] By adopting the above technical solution, after the drill rod is inserted into the soil, the support rod is inserted into the soil, improving the firmness of the drill rod inserted into the soil and the stability of the support of the support plate.

[0028] Optionally, the driving component includes a driving rod, a driving block, and a triggering block. A relief hole for the driving rod to rotate is formed on the circumferential side wall of the rod body. A driving groove for the driving rod to rotate is arranged in the rod body. The driving groove, the relief hole, and the installation chamber are communicated. The side wall in the width direction of the driving rod is rotationally connected to the inner wall of the relief hole through a torsion spring. The triggering block is arranged on the inner wall of the accommodation chamber. The top surface of the triggering block abuts against the part of the driving rod outside the rod body. The part of the driving rod in the driving groove abuts against the top surface of the driving block. The driving block slides in the installation chamber. One end of the driving block away from the driving rod abuts against one end of the support rod inside the drill bit. A second return spring is arranged on the driving block. The second return spring applies a force to the driving block to make the driving block slide upward.

[0029] By adopting the above technical solution, when the drill pipe descends, the part of the driving rod located outside the rod body abuts against the trigger block and rotates upward, causing the part of the driving rod located in the installation chamber to rotate downward, overcoming the acting force of the second return spring to push the driving block downward, thereby overcoming the acting force of the first return spring to push the support rod out of the drill bit;

[0030] When the drill pipe ascends, the driving rod and the trigger block are disengaged from contact, and the driving rod rotates to its original position under the action of the torsion spring. The driving block slides upward and resets under the action of the second return spring, and the support rod slides inward and resets under the action of the first return spring.

[0031] Optionally, a connecting plate is detachably connected between the support plates. The connecting plate is arranged on both sides in the width direction of the support plate. The length of the connecting plate is the same as the length of the support plate. A connecting component is arranged between the connecting plate and the support plate.

[0032] By adopting the above technical solution, the two connecting plates connect the two support plates, and the connection structure of the four plates further improves the support stability of the reinforcement device, and the four plates are connected and are not likely to settle independently, thereby reducing the possibility of settlement of the support plates.

[0033] Optionally, the connecting component includes a connecting rod and a connecting ring plate. The connecting rod is arranged on both sides in the width direction of the connecting plate. A connecting groove is formed in the support plate. The connecting rod passes through the connecting groove. The connecting ring plate is arranged on both sides in the thickness direction of the corresponding support plate;

[0034] An external thread is arranged on the outer peripheral side wall of the connecting rod. The connecting rod includes a first unit rod and a second unit rod which are connected to each other. A first connecting block is arranged at one end of the first unit rod close to the second unit rod. A second connecting block is arranged at one end of the second unit rod close to the first unit rod. The first connecting block and the second connecting block are used in cooperation. The first unit rod is fixedly connected to the connecting plate. A connecting bolt is arranged on the first connecting block. After passing through the first connecting block and the second connecting block, the connecting bolt is threadedly connected with a connecting nut. A first sinking groove for accommodating the nut of the connecting bolt is arranged on the first connecting block. A second sinking groove for accommodating the connecting nut is arranged on the second connecting block;

[0035] An internal thread is arranged on the inner wall of the connecting ring plate. The internal thread is adapted to the external thread. The connecting ring plate includes a first unit plate and a second unit plate. The first unit plate is threadedly connected to the first unit rod. The second unit plate is threadedly connected to the second unit plate. The surfaces of the first unit plate and the second unit plate close to each other abut against both side walls in the thickness direction of the support plate.

[0036] By adopting the above technical solution, after the support plate is installed, the connecting plate is placed horizontally between the support plates. At this time, the first unit rod can enter between the two support plates. The first unit plate is located on the first unit rod, and the first sinking groove is exposed. Then, the second unit rod is passed through the connecting groove and connected to the first unit rod, so that the second connecting block and the first connecting block are matched. Then, the connecting bolt is passed through the first connecting block and the second connecting block and threadedly connected with the upper connecting nut, and the nut of the connecting bolt is located in the first sinking groove, and the connecting nut is located in the second sinking groove, so that the connecting bolt and the connecting nut do not affect the threaded rotation of the first unit plate on the first unit rod. Then, the first unit plate and the second unit plate are rotated until they abut against the support plate.

[0037] In a second aspect, a construction method provided by the present application adopts the following technical solution:

[0038] S1. Fix the support plate: Measure the diameter of the bridge pier with a measuring ruler to determine the installation position of the support plate. Then, move the support plate to a suitable position by a crane. Then, use an auxiliary construction tool to correct the support plate vertically so that the plate surface of the support plate can abut against the peripheral side wall of the bridge pier. Then, start the motor, drive the drill rod to descend and rotate through the transmission shaft, so that the drill rod is inserted into the soil. After the drill rod is inserted into the soil, drive the support rod to extend out of the drill bit under the action of the driving component;

[0039] S2. Fix the connecting plate: Lift the connecting plate into the space between the support plates. Then, pass the second unit rod through the connecting groove and connect it to the first unit rod, so that the second connecting block and the first connecting block are matched. Then, pass the connecting bolt through the first connecting block and the second connecting block and threadedly connect it with the connecting nut, and make the nut of the connecting bolt located in the first sinking groove and the connecting nut located in the second sinking groove, so that the connecting bolt and the connecting nut do not affect the threaded rotation of the first unit plate on the first unit rod. Then, rotate the first unit plate and the second unit plate until they abut against the support plate;

[0040] S3. Fix the lifting member: Fix the lifting member on the top surface of the support plate, and then start the lifting member to lift until it abuts against the bridge body.

[0041] By adopting the above technical solution, the construction method is convenient to operate, and both the support plate and the connecting plate are detachable and can be reused, improving environmental protection and economic benefits.

[0042] In summary, the present application includes at least one of the following beneficial technical effects:

[0043] 1. When installing the reinforcement device, the support plate is moved to a suitable position by a crane, and then the support plate is corrected to be vertical by auxiliary construction tools. Then, the drill rod is driven to rotate while descending through the cooperation of the rotating component and the lifting component, so that the drill rod is fixed in the soil, thereby fixing and installing the support plate. Then, the jacking member is installed on the top of the support plate, and finally, the top of the jacking member is driven to abut against the bottom surface of the bridge body. The operation is convenient. When the reinforcement device needs to be disassembled, the drill rod is driven to rise to the reset position by the lifting component, and then the support plate can be removed, and the reinforcement device can be reused in other places for bridge reinforcement;

[0044] 3. After the drill rod is inserted into the soil, the support rod is inserted into the soil, which improves the firmness of the drill rod inserted into the soil and the stability of the support of the support plate;

[0045] 6. The two connecting plates connect the two support plates, and the connection structure of the four plates further improves the stability of the support of the reinforcement device, and the four plates are connected and are not likely to settle independently, thereby reducing the possibility of settlement of the support plate. Description of the Drawings

[0046] Figure 1 is the overall structural schematic diagram of the in-situ reinforcement device for the settlement of existing bridges in the embodiment of the present application.

[0047] Figure 2 is the structural schematic diagram for showing the drill rod after the soil is cut open in the embodiment of the present application.

[0048] Figure 3 is the structural schematic diagram for showing the lifting component and the rotating component after the support plate and the drill rod are cut open in the embodiment of the present application.

[0049] Figure 4 is Figure 3 the enlarged view of A in

[0050] Figure 5 is Figure 3 the enlarged view of B in

[0051] Figure 6 is Figure 3 the enlarged view of C in

[0052] Figure 7 is the sectional schematic diagram for showing the specific structure of the driving rod in the embodiment of the present application.

[0053] Figure 8 is the exploded schematic diagram for showing the connection component and the connection bolt in the embodiment of the present application.

[0054] Figure 9 is the exploded schematic diagram for showing the connection component and the connection nut in the embodiment of the present application.

[0055] Description of the reference numerals: 1, support plate; 11, first weight-reducing hole; 12, lifting groove; 13, accommodation chamber; 14, connecting groove; 2, jacking member; 21, detection sensor; 3, bridge body; 31, pier; 32, soil; 4, drill rod; 41, rod body; 411, connecting groove; 412, limiting groove; 413, relief hole; 414, driving groove; 42, drill bit; 421, support rod; 4211, first return spring; 422, sliding hole; 43, installation chamber; 5, lifting assembly; 51, motor; 511, transmission shaft; 52, screw rod; 53, slider; 531, connecting column; 532, limiting plate; 54, guide rod; 55, first synchronization assembly; 551, first driving wheel; 552, first driven wheel; 553, first synchronous belt; 6, rotating assembly; 61, rotating ring plate; 611, limiting vertical groove; 612, positioning ring groove; 62, limiting block; 63, positioning ring plate; 64, second synchronization assembly; 641, second driving wheel; 642, second driven wheel; 643, second synchronous belt; 7, driving assembly; 71, driving rod; 711, inner rod; 712, outer rod; 713, telescopic spring; 72, driving block; 721, second return spring; 73, trigger block; 8, connecting plate; 81, second weight-reducing hole; 9, connecting assembly; 91, connecting rod; 911, first unit rod; 9111, first connecting block; 9112, connecting bolt; 9113, first sinking groove; 912, second unit rod; 9121, second connecting block; 9122, connecting nut; 9123, second sinking groove; 92, connecting ring plate; 921, first unit plate; 922, second unit plate. Detailed implementation manners

[0056] The following will Figures 1-9 further describe the present application in detail with reference to the accompanying drawings.

[0057] The embodiment of the present application discloses an in-situ reinforcement device for settlement of existing bridges.

[0058] Refer to Figure 1 and Figure 2, the in-situ reinforcement device for the settlement of existing bridges includes a support plate 1 and a jacking member 2. Each pier 31 corresponds to a set of reinforcement devices. In this embodiment, the jacking member 2 is a jack, which is fixedly installed on the top surface of the support plate 1. On both sides of the top surface of each support plate 1 in the width direction, one jacking member 2 is provided on each side. The side of each jacking member 2 away from the support plate 1 abuts against the bottom surface of the bridge body 3. A detection sensor 21 for controlling the lifting and lowering of the jacking member 2 is provided on the support plate 1. The detection sensor 21 is electrically connected to the jacking member 2. When the detection sensor 21 detects the settlement of the bridge body 3, it sends the settlement amount to the control system of the jacking member 2, so as to control the jacking member 2 to jack up in real time. The support plates 1 are relatively arranged on both sides of the pier 31 in the radial direction, and the surfaces of the two support plates 1 close to each other abut against the pier 31. A number of first weight-reducing holes 11 are provided on the support plate 1, and three first weight-reducing holes 11 are equidistantly arranged along the width direction of the support plate 1.

[0059] Referring to Figure 1 and Figure 2 , a fixing mechanism for fixing the support plate 1 in the soil 32 is provided on the bottom surface of the support plate 1. The fixing mechanism includes a drill rod 4, which is arranged to be lifted and rotated on the support plate 1. A lifting groove 12 for the drill rod 4 to lift is opened on the bottom surface of the support plate 1. The drill rod 4 can rise to be completely located inside the support plate 1, and the drill rod 4 can also descend to drill into the soil 32. The fixing mechanism further includes a lifting component 5 for driving the drill rod 4 to lift and a rotating component 6 for driving the drill rod 4 to rotate. A receiving chamber 13 for accommodating the lifting component 5 and the rotating component 6 is provided inside the support plate 1, and the receiving chamber 13 is communicated with the lifting groove 12. A plurality of drill rods 4 are arranged in the length direction of the support plate 1, and the plurality of drill rods 4 are symmetrically arranged with respect to the midline in the length direction of the support plate 1. In this embodiment, there are two drill rods 4. The drill rod 4 includes a rod body 41 and a drill bit 42 integrally formed. The drill bit 42 is conical, and the drill bit 42 is farther away from the bridge body 3 than the rod body 41.

[0060] When installing the reinforcement device, the support plate 1 is moved to a suitable position by a crane, and then the support plate 1 is corrected to be vertical by an auxiliary construction tool. Then, the rotating component 6 and the lifting component 5 are cooperated to drive the drill rod 4 to rotate while descending, so that the drill rod 4 is fixed in the soil 32, thereby fixedly installing the support plate 1. Then, the jacking member 2 is installed on the top of the support plate 1, and finally, the top of the jacking member 2 is driven to abut against the bottom surface of the bridge body 3, which is convenient to operate; when it is necessary to disassemble the reinforcement device, the drill rod 4 is driven to rise to the reset position by the lifting component 5, and then the support plate 1 can be removed and reused in other places for bridge reinforcement.

[0061] Referring to Figure 1 , Figure 2 and Figure 3, the lifting assembly 5 includes a motor 51, a screw rod 52, a slider 53, and a guide rod 54. The motor 51 is fixedly installed at one of the three first weight reduction holes 11 in the middle. The output shaft of the motor 51 passes through the inner wall of the first weight reduction hole 11 and then penetrates into the accommodation chamber 13. The output shaft of the motor 51 is rotatably connected to the inner wall of the first weight reduction hole 11. The output shaft of the motor 51 is coaxially connected with a transmission shaft 511. The end of the transmission shaft 511 away from the motor 51 is rotatably connected to the inner wall of the accommodation chamber 13 through a bearing, improving the rotational stability of the transmission shaft 511. One drill rod 4 corresponds to one screw rod 52 and one slider 53. The screw rod 52 is rotatably connected to the inner wall of the accommodation chamber 13 through a bearing to limit the axial movement of the screw rod 52. The transmission shaft 511 is simultaneously connected to multiple screw rods 52 through a first synchronous assembly 55 to drive the multiple screw rods 52 to rotate synchronously. The screw rod 52 penetrates into the corresponding slider 53 and is threadedly connected to the corresponding slider 53. The guide rod 54 is in an "L" shape. One end of the guide rod 54 is fixedly connected to the inner wall of the accommodation chamber 13, and the other end of the guide rod 54 penetrates into the slider 53 and is slidably connected to the slider 53. A sliding groove for the guide rod 54 to slide is provided on the top surface of the slider 53.

[0062] Referring to Figure 3 and Figure 4 , the slider 53 is rotatably connected to the end of the drill rod 4 away from the drill bit 42. A limiting plate 532 is connected to the surface of the slider 53 close to the drill rod 4 through a connecting column 531. The end faces of the connecting column 531 and the limiting plate 532 are both circular. The diameter of the limiting plate 532 is larger than the diameter of the connecting column 531. A connecting groove 411 for the connecting column 531 to be clamped is provided on the surface of the rod body 41 away from the drill bit 42. A limiting groove 412 for the limiting plate 532 to be clamped is provided on the inner wall of the connecting groove 411 on the side away from the slider 53. When the drill rod 4 rotates, the limiting plate 532 rotates in the limiting groove 412. Since the limiting plate 532 is clamped in the limiting groove 412 and the end faces of the connecting column 531 and the limiting plate 532 are both circular, the rotation of the drill rod 4 does not affect the lifting of the slider 53, and the slider 53 drives the drill rod 4 to lift when it lifts.

[0063] Referring to Figure 2 and Figure 3 , the first synchronous assembly 55 includes a first driving wheel 551, a first driven wheel 552, and a first synchronous belt 553. The first driving wheel 551 is coaxially connected to the transmission shaft 511. One first driven wheel 552 corresponds to one screw rod 52. The first driven wheel 552 is coaxially connected to the corresponding screw rod 52. The inner wall of the first synchronous belt 553 abuts against the first driving wheel 551 and multiple first driven wheels 552 simultaneously.

[0064] When driving the drill pipe 4 to descend, start the motor 51 to rotate forward, driving the transmission shaft 511 to rotate forward. The transmission shaft 511 drives the first driving wheel 551 to rotate. The first driving wheel 551 drives a plurality of first driven wheels 552 to rotate synchronously through the first synchronous belt 553. Thus, the transmission shaft 511 drives a plurality of screws 52 to rotate synchronously. Under the limitation of the guide rod 54, the screws 52 rotate forward to drive the slider 53 to descend, thereby driving the drill pipe 4 to descend. When driving the drill pipe 4 to ascend, start the motor 51 to rotate reversely, driving the rotating shaft to rotate reversely. The transmission shaft 511 drives a plurality of screws 52 to rotate synchronously and reversely through the first synchronous assembly 55. Under the limitation of the guide rod 54, the screws 52 rotate reversely to drive the slider 53 to ascend, thereby driving the drill pipe 4 to ascend.

[0065] Refer to Figure 3 and Figure 5 As shown in, one drill pipe 4 corresponds to a set of rotating assemblies 6. The rotating assembly 6 includes a rotating ring plate 61, a limiting block 62, and a positioning ring plate 63. The rotating ring plate 61 is sleeved on the rod body 41 of the corresponding drill pipe 4, and the rod body 41 is slidably connected to the rotating ring plate 61. The limiting blocks 62 are fixedly connected to two radially opposite sides of the peripheral side wall of the rod body 41. Limiting vertical grooves 611 for the limiting blocks 62 to slide are vertically formed on the inner wall of the rotating ring plate 61. When the drill pipe 4 ascends and descends, the limiting blocks 62 slide in the limiting vertical grooves 611. Therefore, the drill pipe 4 can rotate while ascending and descending. The length of the rotating ring plate 61 is greater than the length of the positioning ring plate 63. The positioning ring plate 63 is coaxially arranged on the peripheral side wall of the rotating ring plate 61. The inner diameter of the positioning ring plate 63 is smaller than the outer diameter of the rotating ring plate 61, and the inner diameter of the positioning ring plate 63 is greater than the inner diameter of the rotating ring plate 61. A positioning ring groove 612 for the positioning ring plate 63 to be clamped is formed on the peripheral side wall of the rotating ring plate 61. A fixed rod is fixedly connected to the bottom surface of the positioning ring plate 63, and the end of the fixed rod away from the positioning ring plate 63 is fixedly connected to the inner wall of the accommodating chamber 13. The transmission shaft 511 is simultaneously connected to a plurality of rotating ring plates 61 through the second synchronous assembly 64 to drive the plurality of rotating ring plates 61 to rotate synchronously.

[0066] Refer to Figure 2 and Figure 3 As shown in, the second synchronous assembly 64 includes a second driving wheel 641, a second driven wheel 642, and a second synchronous belt 643. The second driving wheel 641 is coaxially connected to the transmission shaft 511. One rotating ring plate 61 corresponds to one second driven wheel 642, and the second driven wheel 642 is coaxially connected to the corresponding rotating ring plate 61. The inner wall of the second synchronous belt 643 abuts against the second driving wheel 641 and a plurality of second driven wheels 642 simultaneously.

[0067] When driving the drill pipe 4 to rotate, the driving transmission shaft 511 rotates, the transmission shaft 511 drives the second driving wheel 641 to rotate, the second driving wheel 641 drives a plurality of second driven wheels 642 to rotate synchronously through the second synchronous belt 643, and the rotating ring plate 61 drives the drill pipe 4 to rotate under the action of the limiting block 62.

[0068] Referring to Figure 2 , Figure 3 and Figure 6 , a support rod 421 is slidably arranged on the drill bit 42. One end of the support rod 421 away from the drill pipe 4 is conical, and four support rods are arranged equidistantly along the circumferential direction of the drill bit 42. The support rod 421 is inclined and slides along the inclined direction. An installation chamber 43 is arranged in the drill pipe 4, and the installation chamber 43 extends from the rod body 41 into the drill bit 42. A sliding hole 422 for the support rod 421 to slide out is formed in the circumferential side wall of the drill bit 42. The sliding hole 422 is inclined and adapted to the inclination degree of the support rod 421. A first return spring 4211 is connected to the side wall of the support rod 421 through a connecting plate. A first return groove for the first return spring 4211 to move and for the connecting plate to slide is arranged in the drill bit 42. The first return spring 4211 applies a force to the support rod 421 to make the support rod 421 face towards the inside of the drill bit 42.

[0069] The support rod 421 can slide out of the drill bit 42 and insert into the soil 32, and the support rod 421 can also slide to be completely located inside the drill bit 42. After the drill pipe 4 is inserted into the soil 32, the support rod 421 is inserted into the soil 32, which improves the firmness of the drill pipe 4 inserted into the soil 32 and improves the stability of the support of the support plate 1.

[0070] Referring to Figure 3 and Figure 7, a driving assembly 7 for driving the sliding of the support rod 421 is arranged in the installation chamber 43. The driving assembly 7 includes a driving rod 71, a driving block 72, and a trigger block 73. The driving rods 71 are located on both sides of the rod body 41 in the radial direction. Yielding holes 413 for the rotation of the driving rods 71 are formed in the circumferential side wall of the rod body 41, and the yielding holes 413 correspond to the driving rods 71 one by one. A driving groove 414 for the rotation of the driving rods 71 is arranged in the rod body 41. The driving groove 414, the yielding holes 413, and the installation chamber 43 are communicated. The side wall of the driving rod 71 in the width direction and the inner wall of the yielding hole 413 are rotationally connected through a torsion spring. The trigger block 73 is fixedly connected to the inner wall of the accommodating chamber 13. The top surface of the trigger block 73 can abut against the part of the driving rod 71 outside the rod body 41. The part of the driving rod 71 in the driving groove 414 can abut against the top surface of the driving block 72. The driving block 72 slides in the installation chamber 43. One end of the driving block 72 away from the driving rod 71 abuts against one end of the support rod 421 inside the drill bit 42. A second return spring 721 is fixedly connected to the top surface of the driving block 72. One end of the second return spring 721 away from the driving block 72 is fixedly connected to the inner wall of the installation chamber 43. The second return spring 721 applies a force to the driving block 72 to make the driving block 72 slide upward.

[0071] Referring to Figure 7 , the driving rod 71 includes an inner rod 711 and an outer rod 712. The inner rod 711 and the outer rod 712 are slidably connected. The inner rod 711 is farther away from the driving block 72 than the outer rod 712. A sliding groove for the sliding of the inner rod 711 is formed on the surface of the outer rod 712 close to the inner rod 711. The inner rod 711 slides in the sliding groove. A telescopic spring 713 is arranged in the sliding groove. One end of the telescopic spring 713 is fixedly connected to the inner wall of the sliding groove, and the other end of the telescopic spring 713 is fixedly connected to one end of the inner rod 711 in the sliding groove. The telescopic spring 713 applies a force to the inner rod 711 to make the inner rod 711 move in a direction away from the outer rod 712. The bottom surface of one end of the inner rod 711 away from the outer rod 712 can abut against the trigger block 73. A wedge surface is arranged on the top surface of one end of the inner rod 711 away from the outer rod 712, so that the driving rod 71 can be completely retracted into the driving groove 414 to reduce the interference of the driving rod 71 on the lifting of the drill pipe 4.

[0072] When the drill pipe 4 descends, the part of the driving rod 71 outside the rod body 41 abuts against the trigger block 73 and rotates upward, causing the part of the driving rod 71 in the installation chamber 43 to rotate downward, pushing the driving block 72 downward against the force of the second return spring 721, thereby pushing the support rod 421 out of the drill bit 42 against the force of the first return spring 4211. When the drill pipe 4 ascends, the driving rod 71 is separated from the trigger block 73, and the driving rod 71 rotates to its original position under the action of the torsion spring. The driving block 72 slides upward and resets under the action of the second return spring 721, and the support rod 421 slides inward and resets into the drill bit 42 under the action of the first return spring 4211.

[0073] Refer to Figure 1 , a connecting plate 8 is detachably connected between the support plates 1. The connecting plates 8 are oppositely arranged on both sides in the radial direction of the pier 31. The mutually approaching surfaces of the connecting plates 8 are in contact with the peripheral side wall of the pier 31. Both the support plates 1 and the connecting plates 8 are steel plates. A plurality of second weight-reducing holes 81 are arranged on the connecting plates 8. The connecting plates 8 are arranged on both sides in the width direction of the support plates 1. The length of the connecting plates 8 is consistent with the length of the support plates 1. A connecting component 9 is arranged between the connecting plates 8 and the support plates 1. The connecting component 9 includes a connecting rod 91 and a connecting ring plate 92. The connecting rod 91 is fixedly connected to the side walls on both sides in the width direction of the connecting plate 8. A strip-shaped connecting groove 14 is formed on the support plate 1. The connecting groove 14 is horizontally arranged, so that the position of the connecting plate 8 can be adjusted according to the diameter of the pier 31. The connecting rod 91 passes through the connecting groove 14, and the connecting ring plate 92 is arranged on both sides in the corresponding thickness direction of the support plate 1.

[0074] Refer to Figure 1 、 Figure 8 and Figure 9 , an external thread is arranged on the outer peripheral side wall of the connecting rod 91. The connecting rod 91 includes a first unit rod 911 and a second unit rod 912 which are connected to each other. The threads of the first unit rod 911 and the second unit rod 912 are matched and continuous. A first connecting block 9111 is integrally formed at one end of the first unit rod 911 close to the second unit rod 912. A second connecting block 9121 is integrally formed at one end of the second unit rod 912 close to the first unit rod 911. The first connecting block 9111 and the second connecting block 9121 are used in cooperation. The first unit rod 911 is fixedly connected to the connecting plate 8. A connecting bolt 9112 is arranged on the first connecting block 9111. After passing through the first connecting block 9111 and the second connecting block 9121, the connecting bolt 9112 is threadedly connected with a connecting nut 9122. A first sinking groove 9113 for accommodating the nut of the connecting bolt 9112 is arranged on the first connecting block 9111. A second sinking groove 9123 for accommodating the connecting nut 9122 is arranged on the second connecting block 9121, so that the connecting bolt 9112 and the connecting nut 9122 do not affect the threaded rotation of the first unit plate 921 on the first unit rod 911.

[0075] Refer to Figure 1 、 Figure 8 and Figure 9, an internal thread is provided on the inner wall of the connecting ring plate 92, and the internal thread is adapted to the external thread. The connecting ring plate 92 includes a first unit plate 921 and a second unit plate 922. The first unit plate 921 is threadedly connected to the first unit rod 911, and the second unit plate 922 is threadedly connected to the peripheral side wall of the second unit plate 922. The length of the first unit plate 921 is greater than the diameter of the first sinking groove 9113. The first unit plate 921 and the second unit plate 922 are rotated to abut against the two side walls in the thickness direction of the support plate 1. Since the first unit plate 921 and the second unit plate 922 are movably arranged on the connecting rod 91, when the reinforcement device is applied to different places, the connecting plate 8 can adapt to the different distances between the two support plates 1.

[0076] The two connecting plates 8 connect the two support plates 1, and the connection structure of the four plates further improves the support stability of the reinforcement device, and the four plates are connected and are not likely to settle independently, thereby reducing the possibility of settlement of the support plate 1. After the support plate 1 is installed, the connecting plate 8 is placed horizontally between the support plates 1. At this time, the first unit rod 911 can enter between the two support plates 1. The first unit plate 921 is located on the first unit rod 911, and the first sinking groove 9113 is exposed. Then the second unit rod 912 is passed through the connecting groove 14 and connected to the first unit rod 911, so that the second connecting block 9121 cooperates with the first connecting block 9111. Then the connecting bolt 9112 is passed through the first connecting block 9111 and the second connecting block 9121 and threadedly connected to the connecting nut 9122, and the nut of the connecting bolt 9112 is located in the first sinking groove 9113 and the connecting nut 9122 is located in the second sinking groove 9123, so that the connecting bolt 9112 and the connecting nut 9122 do not affect the threaded rotation of the first unit plate 921 on the first unit rod 911. Then the first unit plate 921 and the second unit plate 922 are rotated until they abut against the support plate 1.

[0077] The implementation principle of an in-situ reinforcement device for settlement of existing bridges in an embodiment of the present application is as follows:

[0078] First, the support plate 1 is fixedly installed. The support plate 1 is moved to a suitable position by a crane, and then the support plate 1 is corrected vertically by an auxiliary construction tool, and the plate surface of the support plate 1 can abut against the peripheral side wall of the bridge pier 31. Then the motor 51 is started, and the drill rod 4 is driven to descend and rotate through the transmission shaft 511, so that the drill rod 4 is inserted into the soil 32. After the drill rod 4 is inserted into the soil 32, the support rod 421 is driven to extend out of the drill bit 42 under the action of the driving assembly 7;

[0079] Then fixedly install the connecting plate 8, lift the connecting plate 8 into the space between the support plates 1, then pass the second unit rod 912 through the connecting groove 14 and connect it with the first unit rod 911, so that the second connecting block 9121 cooperates with the first connecting block 9111. Then pass the connecting bolt 9112 through the first connecting block 9111 and the second connecting block 9121 and threadedly connect the connecting nut 9122, and make the nut of the connecting bolt 9112 located in the first sinking groove 9113 and the connecting nut 9122 located in the second sinking groove 9123, so that the connecting bolt 9112 and the connecting nut 9122 do not affect the threaded rotation of the first unit plate 921 on the first unit rod 911. Then rotate the first unit plate 921 and the second unit plate 922 until they are in contact with the support plate 1 to fixedly install the connecting plate 8.

[0080] Finally, fixedly install the jacking member 2, fixedly install the jacking member 2 on the top surface of the support plate 1, and then start the jacking member 2 to jack up until it abuts against the bridge body 3.

[0081] The embodiment of the present application also discloses a construction method, which sequentially includes the following steps:

[0082] S1. Fix the support plate 1: Measure the diameter of the pier 31 with a measuring ruler to determine the installation position of the support plate 1. Then move the support plate 1 to a suitable position by a crane, and then use auxiliary construction tools to correct the support plate 1 to be vertical and make the plate surface of the support plate 1 able to abut against the circumferential side wall of the pier 31. Then start the motor 51, drive the drill rod 4 to descend and rotate through the transmission shaft 511, so that the drill rod 4 is inserted into the soil 32. After the drill rod 4 is inserted into the soil 32, drive the support rod 421 to extend out of the drill bit 42 under the action of the driving assembly 7;

[0083] S2. Fix the connecting plate 8: Lift the connecting plate 8 into the space between the support plates 1, then pass the second unit rod 912 through the connecting groove 14 and connect it with the first unit rod 911, so that the second connecting block 9121 cooperates with the first connecting block 9111. Then pass the connecting bolt 9112 through the first connecting block 9111 and the second connecting block 9121 and threadedly connect the connecting nut 9122, and make the nut of the connecting bolt 9112 located in the first sinking groove 9113 and the connecting nut 9122 located in the second sinking groove 9123, so that the connecting bolt 9112 and the connecting nut 9122 do not affect the threaded rotation of the first unit plate 921 on the first unit rod 911. Then rotate the first unit plate 921 and the second unit plate 922 until they are in contact with the support plate 1;

[0084] S3. Fix the jacking member 2: Fixedly install the jacking member 2 on the top surface of the support plate 1, and then start the jacking member 2 to jack up until it abuts against the bridge body 3.

[0085] The construction method is convenient to operate, and both the support plate 1 and the connecting plate 8 are detachable and can be reused, improving the environmental protection and economic benefits.

[0086] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An in-situ reinforcement device for settlement of existing bridges, characterized in that: It includes a support plate (1) and a jacking member (2). The jacking member (2) is connected to the top surface of the support plate (1). The side of the jacking member (2) away from the support plate (1) abuts against the bottom surface of the bridge body (3). The support plates (1) are relatively arranged on both sides in the radial direction of the pier (31), and the mutually approaching surfaces of the support plates (1) abut against the pier (31). A fixing mechanism for fixing the support plate (1) in the soil (32) is provided on the bottom surface of the support plate (1). The fixing mechanism includes a drill rod (4). The drill rod (4) is arranged to be lifted and rotated on the support plate (1). A lifting groove (12) for the drill rod (4) to lift is formed on the bottom surface of the support plate (1). The drill rod (4) can rise to be completely located within the support plate (1), and the drill rod (4) can also descend to drill into the soil (32). The fixing mechanism further includes a lifting assembly (5) for driving the drill rod (4) to lift and a rotating assembly (6) for driving the drill rod (4) to rotate. A receiving chamber (13) for accommodating the lifting assembly (5) and the rotating assembly (6) is provided within the support plate (1), and the receiving chamber (13) communicates with the lifting groove (12).

2. The in-situ reinforcement device for settlement of existing bridges according to claim 1, characterized in that: A plurality of drill rods (4) are arranged in the length direction of the support plate (1). The plurality of drill rods (4) are symmetrically arranged with respect to the midline in the length direction of the support plate (1). The drill rod (4) includes a rod body (41) and a drill bit (42) which are connected to each other. The drill bit (42) is farther away from the bridge body (3) than the rod body (41). The lifting assembly (5) includes a motor (51), a screw rod (52), a slider (53), and a guide rod (54). The output shaft of the motor (51) is connected to a transmission shaft (511). One drill rod (4) corresponds to one screw rod (52) and one slider (53). The transmission shaft (511) is simultaneously connected to a plurality of screw rods (52) through a first synchronous assembly (55) to drive the plurality of screw rods (52) to rotate synchronously. The slider (53) is rotatably connected to the end of the drill rod (4) away from the drill bit (42). A limiting plate (532) is connected to the surface of the slider (53) close to the drill rod (4) through a connecting column (531). The end faces of the connecting column (531) and the limiting plate (532) are both circular. The diameter of the limiting plate (532) is larger than the diameter of the connecting column (531). A connecting groove (411) for the connecting column (531) to be clamped is formed on the surface of the rod body (41) away from the drill bit (42). A limiting groove (412) for the limiting plate (532) to be clamped is formed on the inner wall of the connecting groove (411) on the side away from the slider (53). When the drill rod (4) rotates, the limiting plate (532) rotates within the limiting groove (412). The screw rod (52) penetrates into the corresponding slider (53) and is threadedly connected to the corresponding slider (53). One end of the guide rod (54) is connected to the inner wall of the accommodating chamber (13), and the other end of the guide rod (54) penetrates into the slider (53) and is slidably connected to the slider (53). A chute for the guide rod (54) to slide is formed on the top surface of the slider (53).

3. The in-situ reinforcement device for settlement of existing bridges according to claim 2, characterized in that: One drill rod (4) corresponds to a set of rotating components (6). The rotating components (6) include a rotating ring plate (61), a limiting block (62), and a positioning ring plate (63). The rotating ring plate (61) is sleeved on the rod body (41) of the corresponding drill rod (4). The limiting blocks (62) are connected to two radial sides on the circumferential side wall of the rod body (41). A limiting vertical groove (611) for the limiting block (62) to slide is vertically formed on the inner wall of the rotating ring plate (61). When the drill rod (4) moves up and down, the limiting block (62) slides in the limiting vertical groove (611). The length of the rotating ring plate (61) is greater than that of the positioning ring plate (63). The positioning ring plate (63) is coaxially arranged on the circumferential side wall of the rotating ring plate (61). A positioning ring groove (612) for the positioning ring plate (63) to be clamped is formed on the circumferential side wall of the rotating ring plate (61). A fixing rod is connected to the positioning ring plate (63), and the end of the fixing rod away from the positioning ring plate (63) is connected to the inner wall of the accommodating chamber (13). The transmission shaft (511) is simultaneously connected to a plurality of rotating ring plates (61) through a second synchronization component (64) to drive the plurality of rotating ring plates (61) to rotate synchronously.

4. The in-situ reinforcement device for settlement of existing bridges according to claim 2, characterized in that: The first synchronization component (55) includes a first driving wheel (551), a first driven wheel (552), and a first synchronous belt (553). The first driving wheel (551) is coaxially connected to the transmission shaft (511). One screw rod (52) corresponds to one first driven wheel (552), and the first driven wheel (552) is coaxially connected to the corresponding screw rod (52). The inner wall of the first synchronous belt (553) is simultaneously in contact with the first driving wheel (551) and a plurality of first driven wheels (552).

5. The in-situ reinforcement device for settlement of existing bridges according to claim 3, wherein: The second synchronization component (64) includes a second driving wheel (641), a second driven wheel (642), and a second synchronous belt (643). The second driving wheel (641) is coaxially connected to the transmission shaft (511). One rotating ring plate (61) corresponds to one second driven wheel (642), and the second driven wheel (642) is coaxially connected to the corresponding rotating ring plate (61). The inner wall of the second synchronous belt (643) is simultaneously in contact with the second driving wheel (641) and a plurality of second driven wheels (642).

6. The in-situ reinforcement device for settlement of existing bridges according to claim 2, characterized in that: A support rod (421) is slidably arranged on the drill bit (42), and one end of the support rod (421) away from the drill rod (4) is tapered. The support rod (421) is tilted and slides along the tilted direction. An installation chamber (43) is arranged inside the drill rod (4), and the installation chamber (43) extends from the rod body (41) to the drill bit (42). A sliding hole (422) for the support rod (421) to slide out is opened on the peripheral side wall of the drill bit (42), and the sliding hole (422) is tilted and adapted to the tilt degree of the support rod (421); a first return spring (4211) is arranged on the support rod (421), and the first return spring (4211) applies a force on the support rod (421) to make the support rod (421) move toward the inside of the drill bit (42); The support rod (421) can slide to extend out of the drill bit (42) and insert into the soil (32), and the support rod (421) can also slide to be completely located in the drill bit (42). A driving component (7) for driving the support rod (421) to slide is provided in the installation chamber (43). When the drill rod (4) is inserted into the soil (32), the support rod (421) is inserted into the soil (32).

7. An in-situ reinforcement device for settlement of existing bridges according to claim 6, characterized in that: The driving assembly (7) comprises a driving rod (71), a driving block (72) and a trigger block (73); a clearance hole (413) for the driving rod (71) to rotate is provided on the peripheral side wall of the rod body (41); a driving groove (414) for the driving rod (71) to rotate is provided in the rod body (41); the driving groove (414), the clearance hole (413) and the installation chamber (43) are connected; the side wall of the driving rod (71) in the width direction and the inner wall of the clearance hole (413) are rotatably connected via a torsion spring; the trigger block (73) is arranged on the inner wall of the accommodating chamber (13); the trigger The top surface of the block (73) abuts against the portion of the driving rod (71) located outside the rod body (41), the portion of the driving rod (71) located in the driving groove (414) abuts against the top surface of the driving block (72), the driving block (72) slides in the installation chamber (43), and one end of the driving block (72) away from the driving rod (71) abuts against one end of the support rod (421) located in the drill bit (42); a second return spring (721) is provided on the driving block (72), and the second return spring (721) applies a force to the driving block (72) to make the driving block (72) slide upward.

8. An in-situ reinforcement device for settlement of existing bridges according to claim 1, characterized in that: A connecting plate (8) is detachably connected between the support plates (1); the connecting plates (8) are arranged on both sides of the support plates (1) in a width direction; the length of the connecting plates (8) is consistent with the length of the support plates (1); and a connecting assembly (9) is arranged between the connecting plates (8) and the support plates (1).

9. An in-situ reinforcement device for settlement of existing bridges according to claim 8, characterized in that: The connecting component (9) includes a connecting rod (91) and a connecting ring plate (92). The connecting rod (91) is arranged on both sides in the width direction of the connecting plate (8). A connecting groove (14) is formed in the support plate (1). The connecting rod (91) passes through the connecting groove (14). The connecting ring plate (92) is arranged on both sides in the thickness direction of the corresponding support plate (1). External threads are provided on the outer peripheral side wall of the connecting rod (91). The connecting rod (91) includes a first unit rod (911) and a second unit rod (912) connected to each other. A first connecting block (9111) is arranged at one end of the first unit rod (911) close to the second unit rod (912). A second connecting block (9121) is arranged at one end of the second unit rod (912) close to the first unit rod (911). The first connecting block (9111) and the second connecting block (9121) are used in cooperation. The first unit rod (911) is fixedly connected to the connecting plate (8). A connecting bolt (9112) is arranged on the first connecting block (9111). After passing through the first connecting block (9111) and the second connecting block (9121), the connecting bolt (9112) is threadedly connected with a connecting nut (9122). A first sinking groove (9113) for accommodating the nut of the connecting bolt (9112) is arranged on the first connecting block (9111). A second sinking groove (9123) for accommodating the connecting nut (9122) is arranged on the second connecting block (9121). Internal threads are provided on the inner wall of the connecting ring plate (92). The internal threads are adapted to the external threads. The connecting ring plate (92) includes a first unit plate (921) and a second unit plate (922). The first unit plate (921) is threadedly connected to the first unit rod (911). The second unit plate (922) is threadedly connected to the second unit plate (922). The surfaces of the first unit plate (921) and the second unit plate (922) close to each other are abutted against both side walls in the thickness direction of the support plate (1).

10. A construction method, which applies the in-situ reinforcement device for settlement of existing bridges described in any one of claims 1-9, is characterized in that, The construction method includes: S1. Fix the support plate (1): Measure the diameter of the bridge pier (31) with a measuring ruler to determine the installation position of the support plate (1). Then move the support plate (1) to a proper position by a crane. Then use an auxiliary construction tool to straighten the support plate (1) vertically so that the plate surface of the support plate (1) can be abutted against the peripheral side wall of the bridge pier (31). Then start the motor (51), drive the drill rod (4) to descend and rotate through the transmission shaft (511) so that the drill rod (4) is inserted into the soil (32). After the drill rod (4) is inserted into the soil (32), drive the support rod (421) to extend out of the drill bit (42) under the action of the driving component (7). S2. Fixed connecting plate (8): Lift the connecting plate (8) into the space between the support plates (1), then pass the second unit rod (912) through the connecting groove (14) and connect it with the first unit rod (911) so that the second connecting block (9121) cooperates with the first connecting block (9111). Then pass the connecting bolt (9112) through the first connecting block (9111) and the second connecting block (9121) and threadedly connect the upper connecting nut (9122), and make the nut of the connecting bolt (9112) located in the first sinking groove (9113) and the connecting nut (9122) located in the second sinking groove (9123), so that the connecting bolt (9112) and the connecting nut (9122) do not affect the threaded rotation of the first unit plate (921) on the first unit rod (911). Then rotate the first unit plate (921) and the second unit plate (922) until they abut against the support plate (1); S3. Fixed lifting member (2): Fix the lifting member (2) on the top surface of the support plate (1), and then start the lifting member (2) to lift until it abuts against the bridge body (3).

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