Bridge pile foundation protection device for bridge construction

Abstract

The invention belongs to the technical field of bridge pile foundation protection, and particularly relates to a bridge pile foundation protection device for bridge construction, which comprises two protective covers, the side walls of the two protective covers are fixedly connected with a plurality of connecting blocks, and the connecting blocks fixedly sleeve the two protective covers on the left and right sides of a bridge pile foundation through bolts. When the protection device is used for protecting a bridge pile foundation in a river with the large sediment content, two protection net frames can be arranged on the outer side of the protection device to block sediment, so that abrasion of the sediment to the protection device is avoided, the service life of the protection device is prolonged, and after the protection net frames are blocked, the protection device can be used for protecting the bridge pile foundation. The protective screen frame can be automatically moved to the downstream face, the blocked protective screen frame is backwashed through water flow, shellfish attached to the surface of the protective device can be scraped away through an outer scraper and an inner scraper, and the problem that the load and stress risk of the device are increased by the shellfish is solved.

Description

Technical Field

[0001] This invention belongs to the field of bridge pile foundation protection technology, and in particular relates to a bridge pile foundation protection device for bridge construction. Background Technology

[0002] In the bridge construction industry, bridge pile foundations are an indispensable part of bridge construction. They bear the weight of the bridge and transfer the load to the foundation, ensuring the stability and safety of the bridge. If there are problems with the bridge pile foundations, it will lead to the structural failure of the bridge and even cause serious accidents. Therefore, during bridge construction, construction workers need to take protective measures for the bridge pile foundations to increase the safety of the work. For example, a bridge pile foundation protection device for bridge construction is proposed in patent publication number CN119243778B.

[0003] When protecting bridges in river environments with high sediment content, the sediment-laden water flow will continuously impact the protective devices, especially those made of composite materials. Long-term erosion can cause the materials to gradually thin, crack, or even perforate, thus shortening the service life of the device. If a filter screen or other components are installed in front of the device, the sediment will clog the filter screen, increasing the load on the protective device and causing it to deform. In addition, the protective device is installed on the outside of the bridge pile foundation, which directly blocks the key maintenance parts of the pile foundation and surrounding structure. This makes it impossible for operators to visually observe whether there are defects such as cracks, corrosion, or displacement in the components. Maintenance personnel need to remove the device to check the surface condition of the pile foundation, which undoubtedly increases maintenance costs and time significantly.

[0004] To address these issues, a bridge pile foundation protection device for bridge construction is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a bridge pile foundation protection device for bridge construction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a bridge pile foundation protection device for bridge construction, comprising two protective covers, each of which has multiple connecting blocks fixedly connected to its sidewalls, the connecting blocks securing the two protective covers to the left and right sides of the bridge pile foundation via bolts, and further comprising: Multiple anti-collision seats are evenly distributed on the outside of the two protective covers. The protective covers are hollow and sealed structures, and the inside of the protective covers is filled with high-damping rubber. The inner wall of the protective covers is connected to rollers through shock absorbers. The lower side walls of the two protective covers are connected to float boxes through bolt frame plate mechanisms. A protective component, disposed on the outside of the two protective shields, is used to block mud and sand in the water flow; A lifting assembly is installed on the upper side wall of the protective cover on the right side for lifting the protective cover; An expansion assembly is disposed inside the float on the right side, and the expansion assembly and the lifting assembly are located on the same side.

[0007] Preferably, the protective assembly includes two guide rods, each guide rod having a semi-circular structure. One end of each guide rod is fixedly connected to a snap-fit ​​block, and the end of the guide rod away from the snap-fit ​​block has a snap-fit ​​groove that matches the snap-fit ​​block. The sidewall of the guide rod is bolted to fix the snap-fit ​​block in the snap-fit ​​groove. Both guide rods are welded together with multiple brackets and a protective cover. Guide sleeves are slidably provided on the walls of both guide rods. Two arc-shaped rods are welded between the two guide sleeves. The upper end of each guide sleeve has an open structure, and the lower sidewall of each guide sleeve is connected to a protective mesh frame via a reversing assembly.

[0008] Preferably, the reversing assembly includes a reversing cylinder fixedly connected to the lower side wall of the guide sleeve. A guide plate and a sealing cylinder are fixedly connected to the side wall of the reversing cylinder away from the protective cover. A piston seat is connected to the inner wall of the sealing cylinder near the reversing cylinder by a spring. A bent rod is fixedly connected to the side wall of the piston seat away from the spring. A snap-fit ​​cover is fixedly connected to the upper side wall of the protective mesh frame. One end of the bent rod extending out of the sealing cylinder is located inside the snap-fit ​​cover and is fixed by bolts and the snap-fit ​​cover. One side of the reversing cylinder has an open structure. A telescopic plate is connected to the inner wall of the reversing cylinder by a spring. The reversing cylinder and the sealing cylinder are fixedly connected by the same air supply pipe.

[0009] Preferably, the lifting assembly includes a guide wheel connected to the outside of the bridge pile foundation, a steel cable on the outside of the guide wheel, the left end of the steel cable being connected to the right side of the protective cover, a storage cylinder being connected to the side wall of the right side of the protective cover, the right end of the steel cable being located inside the storage cylinder, a hanging ring being connected to the inner wall of the right side float, and a hook matching the hanging ring being connected to the right end of the steel cable.

[0010] Preferably, the expansion assembly includes a rotating rod rotatably connected to the side wall of the right pontoon. One end of the rotating rod extending out of the pontoon is fixedly connected to a rotating plate. The rotating rod and the right pontoon are located on the back side of the river. One end of the rotating rod inside the pontoon is connected to a support plate via a gear and toothed plate assembly. An arc-shaped frame is fixedly connected to the lower side wall of the support plate. An elastic telescopic cover is provided inside the arc-shaped frame. The elastic telescopic cover can be folded and placed inside the arc-shaped frame. The lower end of the arc-shaped frame extends out of the pontoon and is connected to a water-blocking plate.

[0011] Preferably, the outer walls of the two protective covers are fixedly connected to support frames, the support frames are inverted L-shaped structures, and the lower ends of the two support frames are fixedly connected to outer scrapers.

[0012] Preferably, an inner scraper is fixedly connected to the side wall of the reversing cylinder near the protective cover, and the inner scraper is in contact with the outer wall of the protective cover.

[0013] Preferably, a limiting plate is fixedly connected to the side wall of the rotating plate, and a positioning bolt is threadedly connected to the side wall of the limiting plate.

[0014] Compared with existing technologies, the advantages of a bridge pile foundation protection device for bridge construction are: 1. This invention, through the setting of protective components and reversing components, allows for the use of protective devices to protect bridge pile foundations in rivers with high sediment content. Two protective net frames can be set on the outside of the protective device to block sediment, thereby avoiding wear and tear on the protective device and extending its service life. Furthermore, when the protective net frames become blocked, they can be automatically moved to the backwater side, using the water flow to backwash the blocked protective net frames. At the same time, the unblocked protective net frames are moved to the water-facing side to continue protecting against sediment.

[0015] 2. The present invention, through the setting of lifting and expansion components, can use the thrust of water flow to pull the protective device upward when it is necessary to inspect the defects of the bridge structure, so that the protective device can be moved upward to the set position, exposing the part that needs to be inspected, making it convenient for operators to inspect the defects of the bridge pile foundation.

[0016] 3. The present invention, through the setting of an outer scraper, an inner scraper and a reversing component, can use the outer scraper and the inner scraper to scrape off the shellfish attached to the surface of the protective device during the replacement of the protective covers on both sides of the protective device, thereby avoiding the problem of shellfish increasing the load and stress risk of the device. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a bridge pile foundation protection device for bridge construction provided by the present invention; Figure 2 This is a schematic diagram showing the positional relationship of the outer scraper in a bridge pile foundation protection device for bridge construction provided by the present invention; Figure 3 This is a schematic diagram of the reversing component in a bridge pile foundation protection device for bridge construction provided by the present invention; Figure 4 This is a schematic diagram of the structure of the protective component in a bridge pile foundation protection device for bridge construction provided by the present invention; Figure 5 This is a top view of the protective mesh frame and guide plate in a bridge pile foundation protection device for bridge construction provided by the present invention. Figure 6 This is a schematic diagram of the internal structure of the sealing cylinder in a bridge pile foundation protection device for bridge construction provided by the present invention; Figure 7 This is a schematic diagram of the expansion component in a bridge pile foundation protection device for bridge construction provided by the present invention.

[0018] In the diagram: 1 Protective cover, 2 Connecting block, 3 Anti-collision seat, 4 High damping rubber, 5 Roller, 6 Float box, 7 Protective component, 71 Guide rod, 72 Clip block, 8 Guide sleeve, 9 Protective net frame, 10 Reversing component, 101 Reversing cylinder, 102 Guide plate, 11 Sealing cylinder, 12 Piston seat, 13 Bent rod, 14 Clip cover, 15 Telescopic plate, 16 Air supply pipe, 17 Lifting component, 171 Guide wheel, 172 Steel cable, 18 Storage cylinder, 19 Hanging ring, 20 Expansion component, 201 Rotating rod, 202 Rotating plate, 21 Support plate, 22 Arc frame, 23 Elastic telescopic cover, 24 Water blocking plate, 25 Support frame, 26 Outer scraper, 27 Inner scraper, 28 Limiting plate, 29 Positioning bolt, 30 Arc rod, 31 Bracket. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-7 The bridge pile foundation protection device shown includes two protective covers 1, each with multiple connecting blocks 2 fixedly connected to its sidewalls. The connecting blocks 2 secure the two protective covers 1 to the left and right sides of the bridge pile foundation via bolts. The device also includes: To further enhance the protective capability of the protective cover 1, multiple anti-collision seats 3 are evenly distributed on the outer side of the two protective covers 1. The protective cover 1 is a hollow sealed structure, and the protective cover 1 is filled with high damping rubber 4. The inner wall of the protective cover 1 is connected to rollers 5 through shock absorbers. The lower side walls of the two protective covers 1 are connected to float boxes 6 through bolt frame plate mechanisms. The protective component 7 is installed on the outside of the two protective covers 1 to block mud and sand in the water flow. The protective component 7 includes two guide rods 71, which are semi-circular structures. One end of the guide rod 71 is fixedly connected to a snap-fit ​​block 72. The end of the guide rod 71 away from the snap-fit ​​block 72 is provided with a snap-fit ​​groove that matches the snap-fit ​​block 72. The side wall of the guide rod 71 is fixed to the snap-fit ​​block 72 in the snap-fit ​​groove by bolts. Both guide rods 71 ​​are welded to the protective cover 1 by multiple brackets 31. The rod walls of both guide rods 71 ​​are slidably provided with guide sleeves 8. Two arc-shaped rods 30 are welded between the two guide sleeves 8. The two guide sleeves 8 are connected by the arc-shaped rods 30. The upper end of the guide sleeve 8 is an open structure. The lower side wall of the guide sleeve 8 is connected to a protective mesh frame 9 by a reversing component 10. Through this component, mud and sand in the water flow can be filtered. The length of the protective mesh frame 9 can be adjusted according to the position of mud and sand in the water during manufacturing, so as to fully protect the protective cover 1. The lifting assembly 17 is installed on the upper side wall of the right protective cover 1 and is used to lift the protective cover 1. The lifting assembly 17 includes a guide wheel 171 connected to the outside of the bridge pile foundation. A steel cable 172 is provided on the outside of the guide wheel 171. The left end of the steel cable 172 is connected to the right protective cover 1. A storage cylinder 18 is connected to the side wall of the right protective cover 1. The right end of the steel cable 172 is located inside the storage cylinder 18. A hanging ring 19 is connected to the inner wall of the right float 6. A hook that matches the hanging ring 19 is connected to the right end of the steel cable 172. Through this assembly, the protective device can be raised, which makes it convenient for operators to detect defects in the bridge pile foundation. An expansion assembly 20 is located inside the right-side pontoon 6. The expansion assembly 20 and the lifting assembly 17 are located on the same side. The expansion assembly 20 includes a rotating rod 201 rotatably connected to the side wall of the right-side pontoon 6. A rotating plate 202 is fixedly connected to one end of the rotating rod 201 that extends out of the pontoon 6. A limiting plate 28 is fixedly connected to the side wall of the rotating plate 202. A positioning bolt 29 is threadedly connected to the side wall of the limiting plate 28. The rotating rod 201 and the right-side pontoon 6 are located on the back side of the river. One end of the rotating rod 201 inside the pontoon 6 is connected to a support plate 21 via a gear and toothed plate assembly. An arc-shaped frame 22 is fixedly connected to the lower side wall of the support plate 21. An elastic telescopic cover 23 is provided inside the arc-shaped frame 22. The elastic telescopic cover 23 can be folded and placed inside the arc-shaped frame 22. The lower end of the arc-shaped frame 22 extends out of the pontoon 6 and is connected to a water-blocking plate 24. This assembly can increase the thrust of the water flow on the pontoon 6.

[0021] The reversing assembly 10 includes a reversing cylinder 101 fixedly connected to the lower side wall of the guide sleeve 8. A guide plate 102 and a sealing cylinder 11 are fixedly connected to the side wall of the reversing cylinder 101 away from the protective cover 1. A piston seat 12 is connected to the inner wall of the sealing cylinder 11 near the reversing cylinder 101 via a spring. A bent rod 13 is fixedly connected to the side wall of the piston seat 12 away from the spring. A snap-fit ​​cover 14 is fixedly connected to the upper side wall of the protective mesh frame 9. One end of the bent rod 13 extending out of the sealing cylinder 11 is located inside the snap-fit ​​cover 14 and is fixed to the snap-fit ​​cover 14 by bolts. One side of the reversing cylinder 101 is an open structure. The inner wall of the reversing cylinder 101 is connected to a telescopic plate 15 by a spring. The reversing cylinder 101 and the sealing cylinder 11 are fixedly connected by the same air supply pipe 16. The outer walls of the two protective covers 1 are fixedly connected to support frames 25. The support frames 25 are inverted L-shaped structures. The lower ends of the two support frames 25 are fixedly connected to outer scrapers 26. The side wall of the reversing cylinder 101 near the protective cover 1 is fixedly connected to an inner scraper 27. The inner scraper 27 contacts the outer wall of the protective cover 1. Through this component, the position between the two protective mesh frames 9 can be changed.

[0022] The operating principle of this invention is explained as follows: Two protective covers 1 are fitted onto the outside of the bridge pile foundation, and the connecting block 2 is fixed with bolts, thereby fixing the protective covers 1 onto the left and right sides of the bridge pile foundation. Then, two guide rods 71 ​​are placed, and the snap-fit ​​block 72 is inserted into the snap-fit ​​groove and fixed with bolts, assembling the two guide rods 71 ​​into a ring. Then, the guide rods 71 ​​are welded to the outside of the protective cover 1 through the bracket 31. The two guide sleeves 8 are initially slidably set on the outside of the two guide rods 71. After the two guide rods 71 ​​and the protective cover 1 are welded together through two arc-shaped rods 30, so that the two guide sleeves 8 are kept on the same straight line (see reference). Figure 4 Then, guide wheel 171 is installed on the backwater side of the bridge pile foundation, and the left end of steel cable 172 is passed through guide wheel 171 and connected to the lower protective cover 1. The right end of steel cable 172 is connected to a hook and placed in storage tube 18. Then, the two float boxes 6 are fixed below the two protective covers 1 respectively by bolt frame plate mechanism (the bolt frame plate mechanism includes a bolt fixing frame fixedly connected to the lower side of the protective cover 1, and a bolt plate is fixedly connected to the upper side wall of the float box 6. The bolt plate is fixed in the bolt fixing frame by bolts, so that the float box 6 and the protective cover 1 can be fixed). The float box 6 with expansion component 20 is set on the backwater side of the bridge pile foundation. When using protective devices to protect bridge pile foundations, since the two guide sleeves 8 are on the same straight line, and the guide plates 102 located below the two guide sleeves 8 are also on the same straight line, and the ends of the two guide plates 102 that are far apart from each other are pointed, when the river water flows, the two guide plates 102 can only maintain balance by being placed along the direction of the river flow. Thus, one of the two guide plates 102 faces the water-facing side and the other faces the water-repellent side. The guide plates 102 will drive the two protective net frames 9 to face the water-facing side and the other faces the water-repellent side. The protective net frame 9 facing the water-facing side can filter the silt in the water flow. When the protective net frame 9 facing the water-facing side works for a long time, the mesh of the protective net frame 9 will gradually be blocked by silt and be subjected to a large thrust from the water flow. Under the action of the thrust from the water flow, the protective net frame 9 facing the water-facing side will gradually squeeze the bent rod 13. The bent rod 13 will drive the piston seat 12 to move into the sealing cylinder 11. The piston seat 12 will squeeze the sealing cylinder 11. The gas inside the sealed cylinder 11, under the action of air pressure, is transported to the reversing cylinder 101 through the air supply pipe 16, which increases the air pressure on one side of the telescopic plate 15 inside the reversing cylinder 101. Under the action of air pressure, the telescopic plate 15 will overcome the elastic force of the spring and move out of the reversing cylinder 101 from the side. When the blockage of the water-facing protective net frame 9 reaches 50%, the telescopic plate 15 will extend 60% of its length from the reversing cylinder 101, so that one side of the reversing cylinder 101 (the side with the telescopic plate 15 extending) will bear a large water flow thrust. Therefore, the balance maintained by the two guide plates 102 will be broken. Under the action of water flow thrust, the two guide plates 102 will drive the two protective net frames 9 to rotate 180 degrees, so that the protective net frame 9 originally on the back side moves to the water-facing side to filter the mud and sand. The blocked protective net frame 9 will move to the back side and use the back force of the water flow to clean the mud and sand blocking the surface of the protective net frame 9. During the rotation of the two protective mesh frames 9, the reversing cylinder 101 will drive the inner scraper 27 to rotate. The inner scraper 27 will scrape and clean the shellfish attached to the outside of the protective cover 1. At the same time, the outer scraper 26 will clean the shellfish adhering to the surface of the protective mesh frame 9, thus avoiding the problem of shellfish increasing the load and stress risk of the device. When operators need to inspect bridge pile foundation defects, they remove the protective net frame 9 on the backwater side, and then remove the pontoon 6 on the backwater side (during the removal of the pontoon 6, the lower side of the protective cover 1 can be supported using the ship's support components). Then, the operators adjust the positioning bolts 29 and rotate the rotating plate 202. The rotating plate 202 drives the rotating rod 201 to rotate. The rotating rod 201, through a gear and toothed plate assembly (which includes a gear connected to the rotating rod 201 and a toothed plate connected to the support plate 21; when the rotating rod 201 drives the gear to rotate, the meshing of the gear and toothed plate can move the support plate 21), controls the support plate 21, the arc-shaped frame 22, and the water-blocking plate 24 to move downwards to the set position. The support plate 201 then... 1. Seal the opening on the lower side wall of the pontoon 6, and at the same time, hook the right end of the steel cable 172 onto the hanging ring 19 on the inner wall of the pontoon 6 (the hook may have a spring limit rod on its surface to prevent it from coming off the hanging ring 19). Then, place the pontoon 6 on the water surface. After the river water passes through the pontoon 6, some of the water flow will pass through the arc frame 22 and flow into the elastic telescopic cover 23, thereby increasing the water-facing area of ​​the pontoon 6 and lowering the center of gravity of the pontoon 6. Under the thrust of the water flow, the pontoon 6 will pull the right end of the steel cable 172 towards the back water surface (or, if the water flow is slow, other boats can be used to pull the pontoon 6). The left end of the steel cable 172 will drive the protective device to move upward, exposing the area originally covered by the protective device, making it easier for operators to observe the bridge pile foundation.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bridge pile foundation protection device for bridge construction, comprising two protective covers (1), wherein multiple connecting blocks (2) are fixedly connected to the side walls of both protective covers (1), and the connecting blocks (2) secure the two protective covers (1) to the left and right sides of the bridge pile foundation by bolts, characterized in that, Also includes: Multiple anti-collision seats (3) are evenly distributed on the outside of two protective covers (1). The protective cover (1) is a hollow sealed structure. The protective cover (1) is filled with high damping rubber (4). The inner wall of the protective cover (1) is connected to rollers (5) through shock absorbers. The lower side walls of the two protective covers (1) are connected to float boxes (6) through bolt frame plate mechanisms. The protective component (7) is disposed on the outside of the two protective covers (1) to block mud and sand in the water flow; A lifting assembly (17) is provided on the upper side wall of the protective cover (1) on the right side for lifting the protective cover (1). An expansion assembly (20) is disposed inside the float (6) on the right side, and the expansion assembly (20) and the lifting assembly (17) are located on the same side.

2. The bridge pile foundation protection device for bridge construction according to claim 1, characterized in that, The protective component (7) includes two guide rods (71). The guide rods (71) are semi-circular structures. One end of the guide rod (71) is fixedly connected to a snap-fit ​​block (72). The end of the guide rod (71) away from the snap-fit ​​block (72) is provided with a snap-fit ​​groove that matches the snap-fit ​​block (72). The side wall of the guide rod (71) is fixed to the snap-fit ​​block (72) in the snap-fit ​​groove by bolts. The two guide rods (71) are welded together with the protective cover (1) by multiple brackets (31). The rod walls of the two guide rods (71) are slidably provided with guide sleeves (8). Two arc-shaped rods (30) are welded between the two guide sleeves (8). The upper end of the guide sleeve (8) is an open structure. The lower side wall of the guide sleeve (8) is connected to a protective mesh frame (9) by a reversing component (10).

3. A bridge pile foundation protection device for bridge construction according to claim 2, characterized in that, The reversing assembly (10) includes a reversing cylinder (101) fixedly connected to the lower side wall of the guide sleeve (8). A guide plate (102) and a sealing cylinder (11) are fixedly connected to the side wall of the reversing cylinder (101) away from the protective cover (1). A piston seat (12) is connected to the inner wall of the sealing cylinder (11) near the reversing cylinder (101) by a spring. A bent rod (13) is fixedly connected to the side wall of the piston seat (12) away from the spring. A snap-fit ​​cover (14) is fixedly connected to the upper side wall of the protective mesh frame (9). One end of the bent rod (13) extending out of the sealing cylinder (11) is located inside the snap-fit ​​cover (14) and is fixed by bolts and the snap-fit ​​cover (14). One side of the reversing cylinder (101) is an open structure. A telescopic plate (15) is connected to the inner wall of the reversing cylinder (101) by a spring. The reversing cylinder (101) and the sealing cylinder (11) are fixedly connected by the same gas supply pipe (16).

4. A bridge pile foundation protection device for bridge construction according to claim 1, characterized in that, The lifting assembly (17) includes a guide wheel (171) connected to the outside of the bridge pile foundation. A steel cable (172) is provided on the outside of the guide wheel (171). The left end of the steel cable (172) is connected to the right side of the protective cover (1). A storage cylinder (18) is connected to the side wall of the right side of the protective cover (1). The right end of the steel cable (172) is located inside the storage cylinder (18). A hanging ring (19) is connected to the inner wall of the right side float (6). A hook that matches the hanging ring (19) is connected to the right end of the steel cable (172).

5. A bridge pile foundation protection device for bridge construction according to claim 1, characterized in that, The expansion assembly (20) includes a rotating rod (201) rotatably connected to the side wall of the right pontoon (6). The end of the rotating rod (201) extending out of the pontoon (6) is fixedly connected to a rotating plate (202). The rotating rod (201) and the right pontoon (6) are located on the back side of the river. The end of the rotating rod (201) inside the pontoon (6) is connected to a support plate (21) via a gear tooth plate assembly. The lower side wall of the support plate (21) is fixedly connected to an arc frame (22). An elastic telescopic cover (23) is provided inside the arc frame (22). The elastic telescopic cover (23) can be folded and placed inside the arc frame (22). The lower end of the arc frame (22) extends out of the pontoon (6) and is connected to a water-blocking plate (24).

6. A bridge pile foundation protection device for bridge construction according to claim 1, characterized in that, The outer walls of the two protective covers (1) are fixedly connected to support frames (25), which are inverted L-shaped structures, and the lower ends of the two support frames (25) are fixedly connected to outer scrapers (26).

7. A bridge pile foundation protection device for bridge construction according to claim 3, characterized in that, An inner scraper (27) is fixedly connected to the side wall of the reversing cylinder (101) near the protective cover (1), and the inner scraper (27) is in contact with the outer wall of the protective cover (1).

8. A bridge pile foundation protection device for bridge construction according to claim 5, characterized in that, The side wall of the rotating plate (202) is fixedly connected to a limiting plate (28), and the side wall of the limiting plate (28) is threadedly connected to a positioning bolt (29).

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