Underwater riprap-based ancient pier foundation reinforcing and repairing device and construction method thereof

Abstract

The invention relates to the field of underwater foundation reinforcement in bridge engineering, and provides an ancient bridge pier foundation reinforcement and repair device based on underwater riprap and a construction method thereof.The ancient bridge pier foundation reinforcement and repair device comprises multiple sets of reinforcement modules, corner connecting pieces and a filler area, and the multiple sets of reinforcement modules are used for surrounding a foundation of a bridge pier; the reinforcing module comprises a plurality of reinforcing check blocks which are connected in sequence; a water diversion pile is fixed to one side of the reinforcing check block. The corner connecting pieces are arranged between every two adjacent reinforcing modules and used for connecting the adjacent reinforcing modules. The filler area is arranged between the reinforcing module and the foundation of the pier, and the filler area is filled with reinforcing filler. The foundation reinforcing difficulty of the special-shaped ancient pier is reduced, and the reinforcing effect is improved.

Description

Technical Field

[0001] The present application relates to the field of underwater foundation reinforcement in bridge engineering, and in particular to an ancient bridge pier foundation reinforcement and repair device based on underwater riprap and a construction method thereof. Background Art

[0002] As time goes by and environmental factors change, many ancient bridges have suffered varying degrees of damage or aging, which seriously affects their functionality and safety. Ancient bridges are not only important transportation facilities, but also important carriers of historical culture, so their protection and restoration are of great significance. Traditional reinforcement methods mainly focus on the reinforcement of the pier body, such as reinforcement with steel or concrete components, or grouting reinforcement, carbon fiber cloth reinforcement, composite material wrapping reinforcement, etc. Although these methods can effectively improve the strength and stability of the piers, they have destroyed the historical features of the ancient bridges to a certain extent, and relatively little attention has been paid to the reinforcement of the foundation of the piers.

[0003] In the existing bridge pier reinforcement technology, in order to deal with different types of bridge pier damage, common reinforcement methods include steel component reinforcement, concrete reinforcement, grouting reinforcement, carbon fiber cloth reinforcement, and composite material wrapping reinforcement. In addition, there are some reinforcement methods specifically for bridge pier foundations, such as pouring reinforcement with steel mesh and concrete, or reinforcement with prestressed anchor cables. However, these methods have some limitations in practical applications, especially when facing polygonal special-shaped ancient bridge piers, the construction is difficult, the cost is high, and it is difficult to guarantee the reinforcement effect.

[0004] At present, most existing bridge pier reinforcement methods focus on the reinforcement of the pier body, and rarely involve the reinforcement of the pier foundation. Especially when facing polygonal and other special-shaped ancient bridge piers, the existing reinforcement methods are complex in structure and difficult to construct, and cannot effectively solve the problem of damage to the pier foundation caused by water erosion. Summary of the invention

[0005] In order to reduce the difficulty of foundation reinforcement of special-shaped ancient bridge piers and improve the reinforcement effect, on the one hand, the present application provides an ancient bridge pier foundation reinforcement and repair device based on underwater riprap.

[0006] The following technical solutions are adopted, including: A plurality of reinforcement modules are provided, and the plurality of reinforcement modules are used to enclose the foundation of the bridge pier. The reinforcement modules include a plurality of reinforcement blocks connected in sequence; a water diversion pile is fixed on one side of the reinforcement block; A corner connector, disposed between two adjacent groups of reinforcement modules, and used to connect adjacent reinforcement modules; A filler area, wherein the filler area is arranged between the reinforcement module and the foundation of the pier, and the filler area is filled with reinforcement filler.

[0007] By adopting the above technical solution, the construction process is simplified, the construction time is reduced, and the construction efficiency is improved by connecting the reinforcement modules and corner connectors around the foundation of the bridge pier to form a closed enclosure. The design of the reinforcement block and the water diversion pile effectively prevents the direct impact of the water flow on the foundation of the bridge pier, reduces water erosion, and enhances the stability of the foundation of the bridge pier. The solution is suitable for the foundation of polygonal special-shaped ancient bridge piers, has strong versatility and adaptability, and can meet the reinforcement needs of different bridge piers. In addition, the original historical features of the ancient bridge piers are preserved through non-destructive or minimally destructive reinforcement methods, avoiding the damage that may be caused by traditional reinforcement methods.

[0008] Optionally, in the same reinforcement module, a connection grid is provided between adjacent reinforcement blocks, and the connection grid is made of metal material.

[0009] By adopting the above technical solution, on the one hand, the connection grid can effectively improve the overall stability of the reinforcement module and ensure its stability under the impact of water flow; on the other hand, the gaps between adjacent reinforcement blocks are closed with steel grids, which prevents the reinforcement seasoning in the filler area from overflowing under the impact of water flow, further improving the safety performance of the entire device. The choice of metal materials makes the connection grid have higher strength and corrosion resistance, adapting to long-term underwater environment and extending service life.

[0010] Optionally, an anti-flow protection device is provided on one side of the corner connector, and the anti-flow protection device includes an anti-flow enclosure and an anti-flow swing blade provided on one side of the corner connector, two anti-flow swing blades are provided on the corner connector at intervals, and the anti-flow enclosure is provided between the two anti-flow swing blades.

[0011] By adopting the above technical solution, the anti-flow protection device can block and disperse the water flow when passing through the corner of the bridge pier, thereby reducing the erosion of the foundation of the bridge pier by the water flow, effectively reducing the direct impact of the water flow on the corner of the bridge pier, and improving the anti-scouring ability of this part.

[0012] Optionally, one end of the anti-flow swing blade is rotatably connected to the corner connector, and the anti-flow enclosure includes two rotatably connected auxiliary baffles; The distance between the two auxiliary blocking pieces gradually increases toward the direction approaching the corner connecting piece, and one end of the auxiliary blocking piece close to the anti-flow swing blade is slidably connected to the anti-flow swing blade.

[0013] By adopting the above technical solution, when the reinforced blocks on both sides of the corner connector are impacted by water flow, the water flow impacts the water diversion pile and then diverts to both sides of the water diversion pile; the diverted water flow partially flows to the adjacent reinforced blocks, causing another impact on the reinforced blocks. The end of the auxiliary baffle close to the anti-flow swing blade is slidably connected to the anti-flow swing blade, and the end of the auxiliary baffle close to the anti-flow swing blade is slidably connected to the anti-flow swing blade; the diverted water flow under the action of the water diversion pile flows to the anti-flow swing blade, driving the anti-flow swing blade to rotate in the direction close to the anti-flow enclosure; and the two auxiliary baffles in the anti-flow enclosure rotate under the impact of water flow to hinder the rotation of the anti-flow swing blade, so that the water flow impact on the anti-flow enclosure and the diversion impact on the anti-flow swing blade are offset, thereby weakening the overall water flow impact, so as to weaken the impact of water flow diversion on the reinforced block, and enhance the reliability of the device.

[0014] Optionally, a driving member is provided on the corner connecting member, and the driving member is used to drive the end of the auxiliary baffle away from the anti-flow swing blade to move in a direction away from the corner connecting member.

[0015] By adopting the above technical solution, when the two auxiliary baffles in the anti-flow enclosure move to the end of the stroke under the action of water flow, the driving member can drive the end of the auxiliary baffle away from the anti-flow swing blade to move to the initial position in the direction away from the corner connecting member, so as to facilitate the reuse of the anti-flow protection device.

[0016] Optionally, a diversion plug plate is provided on a side of the connection grid close to the water diversion pile, and a cross-sectional area of ​​the diversion plug plate gradually decreases in a direction away from the connection grid.

[0017] By adopting the above technical solution, the cross-sectional area of ​​the diversion plug plate gradually decreases in the direction away from the connection grid, which can effectively disperse the impact force of the water flow, reduce the direct impact of the water flow on the connection grid, and improve the stability and durability of the entire reinforced structure.

[0018] On the other hand, the present application provides a method for reinforcing and repairing the foundation of an ancient bridge pier based on underwater riprap. The reinforcement and repair construction is performed using the above-mentioned ancient bridge pier foundation reinforcement and repair device based on underwater riprap, including the following steps: S1. Design of foundation reinforcement scheme for bridge piers; S2. Pretreatment of pier foundation reinforcement; S3, reinforcement module installation; S4, throwing gravel into the filling area for filling; S5. Installation of water diversion piles; S6. Inspection and acceptance.

[0019] By adopting the above technical solutions, S1 ensured the scientificity and rationality of the reinforcement plan and improved the feasibility of subsequent construction; S2 enhanced the bearing capacity of the foundation and reduced the difficulty of subsequent construction by cleaning the riverbed and repairing the subgrade; S4 threw gravel in the filling area to improve the stability of the pier foundation; S5 reduced the direct impact of water flow on the piers and reinforcement blocks by adding water diversion piles, which played the first line of protection; S6 ensured the quality and safety of the entire reinforcement process and avoided potential risks.

[0020] Optionally, the step S1 includes: S11. Use exploration tools to inspect bridge piers for defects; S12. Design the foundation reinforcement drawings of the bridge piers based on the survey results, determine the number and installation positions of the reinforcement blocks in each reinforcement module, and determine the scope of the filling area.

[0021] By adopting the above technical solution and using exploration tools to conduct disease surveys on bridge piers, we can accurately understand the specific disease conditions of bridge piers, ensure the pertinence and effectiveness of subsequent design solutions, and avoid the waste of resources and the risk of reinforcement failure caused by blind construction. Designing the foundation reinforcement drawings of bridge piers based on the survey results, determining the number and installation position of reinforcement blocks in each reinforcement module, and determining the range of the filling area can ensure the rationality and feasibility of reinforcement measures, optimize the construction process, reduce uncertainty and risks during the construction process, and improve construction quality and safety.

[0022] Optionally, step S2 includes: S21. Clear the silt covering layer on the riverbed around the bridge piers until the hard bed is exposed; S22, fill the holes on the base bed with molded concrete; S23. Use crushed stone to level the surface of the base bed.

[0023] By adopting the above technical solution, the silt covering layer on the riverbed around the bridge piers is cleaned until the hard base bed is exposed, the soft bottom layer can be removed, the overall stability and bearing capacity of the base bed can be improved, and a solid foundation can be laid for subsequent reinforcement work. Filling the holes on the base bed can block the holes caused by water erosion, prevent the water flow from further eroding the base bed, and at the same time enhance the integrity of the base bed and improve the bearing capacity of the foundation. Leveling the surface of the base bed can further increase the flatness of the base bed, ensure the uniform distribution of the reinforcement materials, avoid local stress concentration, and thus improve the uniformity and stability of the reinforcement effect.

[0024] Optionally, step S3 includes: S31. Determine the installation position of the reinforcement block according to the foundation reinforcement drawing of the bridge pier, and place a water positioning float at the installation position for positioning; S32. Install a permeable tetrahedron frame at the construction area; S33, hoisting a plurality of reinforcement blocks to the installation position in sequence, then connecting the reinforcement blocks in the same group of reinforcement modules using a connecting grid and a chain, and then connecting two adjacent reinforcement modules using a corner connector.

[0025] By adopting the above technical solution, the installation position of the reinforcement block is accurately ensured by placing a water positioning float at the installation position, avoiding poor reinforcement effect caused by position deviation, thereby improving construction accuracy. Installing a permeable tetrahedron frame can effectively reduce the impact of water flow on the construction area, protect the safety of construction equipment and personnel, and also help maintain the stability of the construction area and improve construction efficiency.

[0026] 1. This application can directly use underwater operations to reinforce and repair the bridge pier foundation, without the need to build a cofferdam around the bridge pier, and then drain the water inside before performing dry operations, which simplifies the reinforcement process.

[0027] 2. By using the reinforcement modules and corner connectors to form a closed enclosure around the pier foundation, and throwing gravel in the filling area formed between the reinforcement modules and the pier foundation, the pier foundation is protected by the gravel as the last line of water flow impact protection, which prevents the water flow from directly impacting the pier foundation and improves the safety of the pier foundation; 3. Adding steel tube concrete water diversion piles on the side of the reinforcement block away from the pier reduces the direct impact of water flow on the foundation of the pier and the reinforcement block, plays the role of the first line of defense against water flow impact, and reduces the risk of erosion of the foundation of the pier by water flow; 4. The gaps between the reinforcement blocks are closed with steel grids to prevent the overflow of gravel under the impact of water flow, ensuring the integrity and durability of the reinforcement module, while simplifying the construction process and reducing the difficulty of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of the ancient bridge pier foundation reinforcement and repair device based on underwater riprap in Example 1 of the present application; Figure 2 is a partial enlarged structural schematic diagram of Example 1 of the present application; Figure 3 is a partial enlarged structural schematic diagram of Example 2 of the present application; Explanation of the accompanying drawings: 1. reinforcement module; 11. reinforcement block; 111. horizontal support platform; 112. vertical baffle; 12. water diversion pile; 13. connecting ear plate; 14. lifting ear plate; 2. corner connector; 3. filling area; 4. connecting grid; 5. anti-current protection device; 51. anti-current enclosure; 511. auxiliary baffle; 512. guide slider; 52. anti-current swing blade; 521. slide; 6. driving member; 7. diversion plug plate; 8. chain; 81. shackle; 9. bridge pier; 10. arc-shaped push piece. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 -Attached Figure 3 This application is described in further detail.

[0030] Embodiment 1: Embodiment 1 of the present application provides a device for reinforcing and repairing the foundation of an ancient bridge pier based on underwater riprap.

[0031] Reference Figure 1 and Figure 2 The ancient bridge pier foundation reinforcement and repair device based on underwater riprap provided in the embodiment of the present application includes multiple groups of reinforcement modules 1 and corner connectors 2. Among them, multiple groups of reinforcement modules 1 are provided, and each group of reinforcement modules 1 includes multiple reinforcement blocks 11 connected in sequence. The reinforcement block 11 includes a horizontal support platform 111 and a vertical baffle 112 integrally formed on the horizontal support platform 111, and a water diversion pile 12 is provided on one side of the vertical baffle 112, and the water diversion pile 12 is fixedly connected to the horizontal support platform 111. In the same reinforcement module 1, a connection grid 4 is fixed between two adjacent reinforcement blocks 11, and the connection grid 4 is woven from steel bars. Both sides of the reinforcement block 11 are fixed with connecting ear plates 13; a number of chains 8 are also arranged between two adjacent reinforcement blocks 11, and shackles 81 are fixed at both ends of the chain 8. Both ends of the chain 8 are hooked on the connecting ear plates 13 of different reinforcement blocks 11 through the shackles 81, so as to further strengthen the connection between the two adjacent reinforcement blocks 11. A lifting ear plate 14 is fixed on the top of the reinforcement block 11. During construction, the reinforcement block 11 can be lifted to the construction site through the lifting ear plate 14.

[0032] Reference Figure 1In this embodiment, the construction of a hexagonal pier 9 is taken as an example. Specifically, six groups of reinforcement modules 1 are provided, and a group of reinforcement modules 1 is installed on each side of the pier 9 to enclose the foundation of the pier 9. The number of reinforcement blocks 11 in each reinforcement module 1 is not completely consistent, and is specifically determined according to the length of the side of the corresponding pier 9 and the size of the reinforcement block 11. The reinforcement block 11 can be made of concrete material or steel to increase its durability and strength. The water diversion pile 12 is specifically set to a cylindrical shape and is made of reinforced concrete material. The length and diameter of the water diversion pile 12 can be adjusted according to actual needs. In this embodiment, the height of the water diversion pile 12 is 1.5 times the height of the reinforcement block 11 to better resist the impact of water flow.

[0033] Reference Figure 2 The corner connector 2 is fixed between two adjacent groups of reinforcement modules 1. The corner connector 2 is specifically arranged in a rectangular block shape and is also cast by concrete. Multiple groups of reinforcement modules 1 are combined with the connection grid 4 and the corner connector 2 to form a closed enclosure, so that a filling area 3 is formed between the multiple groups of reinforcement modules 1 and the foundation of the pier 9. The filling area 3 is filled with a reinforcement filler (not shown in the figure), so as to achieve the effect of improving the foundation stability of the pier 9.

[0034] Reference Figure 1 The reinforcement filler is mainly crushed stone, and gravel, sand and other materials of different particle sizes can also be added to form a more stable filling structure. When filling the filler area 3, the filler area 3 can be divided into three layers from bottom to top, the first layer is coarse crushed stone, the second layer is a mixture of fine crushed stone and gravel, and the third layer is fine sand. The thickness of each layer can be adjusted according to actual conditions. Layered filling can improve the density and stability of the filler area 3 and reduce the erosion of water flow on the filler.

[0035] During the filling process, after each layer of filling is laid, it is necessary to perform compaction treatment and then lay a layer of geotextile to ensure the density of the filling. The compaction treatment can be performed using a vibrating device or an underwater rolling device. The compacted filling area 3 is more stable and can better resist the impact of water flow, thereby extending the service life of the foundation of the bridge pier 9.

[0036] The implementation principle of this embodiment is: by connecting the foundation periphery of the pier 9 with the reinforcement block 11 and the water diversion pile 12 to form a closed enclosure, and throwing gravel in the filling area 3 formed between the cofferdam and the pier 9 body, a stable support structure is formed. The connection grid 4 between the reinforcement block 11 works together to improve the sealing of the filling area 3 and reduce the loss of the reinforcement filling. At the same time, the setting of the water diversion pile 12 plays the role of the first water flow impact defense line, further enhancing the protection capability of the foundation of the pier 9.

[0037] Embodiment 2: Embodiment 1 of the present application provides a device for reinforcing and repairing the foundation of an ancient bridge pier based on underwater riprap.

[0038] Reference Figure 3 When the two reinforcement blocks 11 on both sides of the corner connector 2 are impacted by water flow, the water flow impacts the water diversion pile 12 on one reinforcement block 11, and then diverts to both sides of the water diversion pile 12; the diverted water flow part flows to the other reinforcement block, causing another impact on the other reinforcement block 11.

[0039] Reference Figure 3 In order to reduce the secondary impact of the two reinforced blocks 11 on both sides of the corner connector 2 due to the diversion of water flow, in this embodiment, among the multiple reinforced blocks 11 connected to the corner connector 2, no connecting ear plate 13 (not shown in the figure) is provided on the side of each reinforced block 11 close to the corner connector 2. The corner connector 2 is connected to an anti-current protection device 5 on the side close to the water diversion pile 12. The anti-current protection device 5 includes an anti-current enclosure 51 and an anti-current swing blade 52, and there is a certain distance between the connection between the anti-current swing blade 52 and the corner connection and the adjacent reinforced block 11. Two anti-current swing blades 52 are arranged at intervals on the corner connector 2, and one end of each anti-current swing blade 52 is rotatably connected to the corner connector 2 through a hinge support; the anti-current enclosure 51 is arranged between the two anti-current swing blades 52, and the anti-current enclosure 51 includes two hinged auxiliary baffles 511. One end of the auxiliary baffle 511 close to the anti-flow swing blade 52 is hinged to a guide slider 512 through a ball joint support, and a slide groove 521 is provided on the side wall of the anti-flow swing blade 52. The guide slider 512 is slidably arranged in the slide groove 521 to achieve a sliding connection between one end of the auxiliary baffle 511 and the anti-flow swing blade 52. The anti-flow protection device 5 is in an initial position before being impacted by the water flow, that is, the distance between the two auxiliary baffles 511 gradually increases toward the direction close to the corner connector 2.

[0040] Reference Figure 2 When the water flow that impacts the reinforcement block 11 is diverted by the water diversion pile 12, it will flow to the anti-flow swing blade 52, driving the anti-flow swing blade 52 to rotate in the direction close to the anti-flow enclosure 51; and under the impact of the water flow, the two auxiliary baffles 511 in the anti-flow enclosure 51 rotate to drive the guide slider 512 to slide in the direction away from the corner connector 2. During the sliding process of the guide slider 512, the anti-flow swing blade 52 is driven to rotate in the direction close to the adjacent reinforcement block 11, thereby hindering the rotation of the anti-flow swing blade 52. The water flow impact on the anti-flow enclosure 51 and the diverted water impact on the anti-flow swing blade 52 are offset, thereby weakening the overall water flow impact. In this process, when the two reinforced blocks 11 on both sides of the corner connector 2 are impacted by the water flow, the water flow diverted by the water diversion pile 12 on one reinforced block 11 is difficult to impact the other reinforced block 11, thereby improving the durability of the reinforced blocks 11 on both sides of the corner connector 2.

[0041] Reference Figure 3 , a driving member 6 is also provided on the corner connector 2. The driving member 6 can be an electric push rod, which is fixed on the corner connector 2, and one end of the telescopic rod of the electric push rod is connected to an arc-shaped push piece 10, and the arc-shaped push piece 10 is located on one side of the connection between the two auxiliary baffles 511. When the position of the anti-flow enclosure 51 after movement is offset from the initial position, the electric push rod is started to drive the arc-shaped push piece 10 to push the connection between the two auxiliary baffles 511, so that the anti-flow enclosure 51 moves and returns to the initial state, so as to resist the impact of water flow for multiple times.

[0042] Reference Figure 3 A diversion plug plate 7 is provided on one side of the connection grid 4 close to the water diversion pile 12, and the diversion plug plate 7 is fixed between two adjacent reinforcement blocks 11 in the same reinforcement module 1, and the cross-sectional area of ​​the diversion plug plate 7 gradually decreases in the direction away from the connection grid 4. The arrangement of the diversion plug plate 7 can effectively guide the water flow, reduce the impact of the water flow on the connection grid 4, and improve the stability of the entire reinforcement system.

[0043] Embodiment 3: Embodiment 3 of the present application provides a construction method for reinforcing and repairing the foundation of an ancient bridge pier based on underwater riprap, comprising the following steps: S1. Design of foundation reinforcement scheme for pier 9.

[0044] S11, using exploration tools to perform disease investigation and size measurement on the bridge pier 9; S12. Design the foundation reinforcement drawings of the bridge pier 9 according to the survey results, determine the number and installation position of the reinforcement blocks 11 in each reinforcement module 1, and determine the range of the filling area 3. Specifically, the height and width of the filling range need to be determined, and the size and number of the reinforcement blocks 11 and the water diversion piles 12 are determined according to the filling range.

[0045] S2. Pretreatment of the foundation reinforcement of pier 9.

[0046] S21. Clear the silt covering layer on the riverbed around the bridge pier 9 until the hard base bed is exposed.

[0047] S22. Use molded concrete to fill the holes on the base bed. When filling, the molded concrete is placed into the hole through a conduit for underwater filling. The construction personnel adjust the position of the underwater multi-molded concrete and cut a crack on the surface of each molded concrete bag to allow some cement to overflow and solidify, so as to enhance the integrity between the molded concrete and compensate for the loss of bearing capacity of the base bed.

[0048] S23. Use crushed stone to level the surface of the base bed.

[0049] S3. Reinforcement module 1 is installed.

[0050] S31, determining the installation position of the reinforcement block 11 according to the foundation reinforcement drawing of the bridge pier 9, and placing a water positioning float at the installation position for positioning; S32. Install a permeable tetrahedron frame at the construction area; S33, lift multiple reinforcement blocks 11 to the installation position in sequence through the lifting ear plates 14, then use the connecting grid 4 and the chain 8 to connect the reinforcement blocks 11 in the same group of reinforcement modules 1, and then use the corner connector 2 to fix between two adjacent reinforcement modules 1 to achieve the connection between the two adjacent reinforcement modules 1.

[0051] S4, filling treatment of filler area 3. Throw crushed stones according to a certain gradation between the reinforcement module 1 and the bridge pier 9, and after filling to a certain thickness, lay a layer of geotextile, and then continue to fill with crushed stones and other reinforcement fillers.

[0052] S5, installation of water diversion pile 12. A water diversion pile 12 is installed on the water-facing surface of the reinforcement block 11 to form the first line of defense against water flow impact, thereby reducing the impact of water flow on the bridge pier 9 body.

[0053] The water diversion pile 12 can be installed by using a water crane and an underwater frogman. During the installation process, each water diversion pile 12 is first hoisted to a predetermined position on the corresponding reinforcement block 11, and then fixed with a connector. The connector can be a bolt, a pin, etc.

[0054] S6. Inspection and acceptance: Carry out a comprehensive inspection of the completed reinforcement and repair project to ensure that all indicators meet the design requirements.

[0055] 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. An ancient bridge pier foundation reinforcement and repair device based on underwater riprap, characterized in that: include: A plurality of reinforcement modules (1) are provided, wherein the plurality of reinforcement modules (1) are used to enclose the foundation of the bridge pier (9), and the reinforcement modules (1) include a plurality of reinforcement blocks (11) connected in sequence; a water diversion pile (12) is fixed to one side of the reinforcement block (11); A corner connector (2) is disposed between two adjacent groups of reinforcement modules (1) and is used to connect adjacent reinforcement modules (1); A filler area (3), the filler area (3) being arranged between the reinforcement module (1) and the foundation of the bridge pier (9), the filler area (3) being filled with reinforcement filler.

2. The ancient bridge pier foundation reinforcement and repair device based on underwater riprap according to claim 1 is characterized in that: In the same reinforcement module (1), a connection grid (4) is provided between adjacent reinforcement blocks (11), and the connection grid (4) is made of metal material.

3. The ancient bridge pier foundation reinforcement and repair device based on underwater riprap according to claim 2 is characterized in that: An anti-flow protection device (5) is provided on one side of the corner connecting member (2), and the anti-flow protection device (5) comprises an anti-flow enclosure (51) and an anti-flow swing blade (52) provided on one side of the corner connecting member (2), two anti-flow swing blades (52) are provided on the corner connecting member (2) at intervals, and the anti-flow enclosure (51) is provided between the two anti-flow swing blades (52).

4. The ancient bridge pier foundation reinforcement and repair device based on underwater riprap according to claim 3 is characterized in that: One end of the anti-flow swing blade (52) is rotatably connected to the corner connector (2), and the anti-flow enclosure (51) comprises two rotatably connected auxiliary baffles (511); The distance between the two auxiliary blocking pieces (511) gradually increases in a direction approaching the corner connecting piece (2), and one end of the auxiliary blocking piece (511) close to the anti-flow swing blade (52) is slidably connected to the anti-flow swing blade (52).

5. The ancient bridge pier foundation reinforcement and repair device based on underwater riprap according to claim 4 is characterized in that: The corner connecting member (2) is provided with a driving member (6), and the driving member (6) is used to drive the end of the auxiliary blocking piece (511) away from the anti-flow swing blade (52) to move in a direction away from the corner connecting member (2).

6. The ancient bridge pier foundation reinforcement and repair device based on underwater riprap according to claim 2 is characterized in that: A flow diversion plug plate (7) is provided on one side of the connection grid (4) close to the water diversion pile (12), and the cross-sectional area of ​​the flow diversion plug plate (7) gradually decreases in a direction away from the connection grid (4).

7. A construction method for reinforcing and repairing the foundation of an ancient bridge pier based on underwater riprap, characterized in that: The reinforcement and repair construction is carried out using the ancient bridge pier foundation reinforcement and repair device based on underwater riprap as described in any one of claims 2 to 6, comprising the following steps: S1. Design of foundation reinforcement scheme for pier (9); S2, pretreatment of foundation reinforcement of bridge pier (9); S3, reinforcement module (1) installation; S4, throwing gravel into the filling area (3) for filling; S5, water diversion pile (12) installation; S6. Inspection and acceptance.

8. The method for reinforcing and repairing the foundation of an ancient bridge pier based on underwater riprap according to claim 7 is characterized in that: The step S1 comprises: S11, using exploration tools to conduct disease investigation on the bridge pier (9); S12. Design a foundation reinforcement drawing for the bridge pier (9) based on the survey results, determine the number and installation position of the reinforcement blocks (11) in each reinforcement module (1), and determine the range of the filler area (3).

9. The method for reinforcing and repairing the foundation of an ancient bridge pier based on underwater riprap according to claim 8 is characterized in that: The step S2 comprises: S21, clearing the silt covering layer on the riverbed around the bridge pier (9) until the hard bed is exposed; S22, fill the holes on the base bed with molded concrete; S23. Use crushed stone to level the surface of the base bed.

10. The method for reinforcing and repairing the foundation of an ancient bridge pier based on underwater riprap according to claim 9, characterized in that: The step S3 comprises: S31, determining the installation position of the reinforcement block (11) according to the foundation reinforcement drawing of the bridge pier (9), and placing a water positioning float at the installation position for positioning; S32. Install a permeable tetrahedron frame at the construction area; S33, hoisting a plurality of reinforcement blocks (11) to the installation position in sequence, then connecting the reinforcement blocks (11) in the same group of reinforcement modules (1) using the connection grid (4) and the chain (8), and then connecting two adjacent reinforcement modules (1) using the corner connector (2).

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