Underwater pile foundation scouring protection device

Abstract

The underwater pile foundation scouring protection device comprises an underwater pile, a foundation main pile is arranged at the bottom of the underwater pile, a protection sleeve is built on the outer surface of the underwater pile, and a foundation bottom pile is built on the outer surface of the bottom of the foundation main pile; the foundation bottom pile is connected with a plurality of cylinders arranged along the periphery of the foundation main pile in a staggered mode, the top ends of the cylinders are provided with covers, and the outer surfaces of the cylinders are provided with a plurality of circulation holes capable of communicating with inner cavities of the cylinders. The protective sleeve is detachably connected with a supporting framework in a sleeving mode, and the supporting framework is detachably connected with a plurality of flow dividing assemblies. The flow dividing piece comprises a sliding column connected to the steel cable in a sleeving mode, and at least three flow dividing protrusions are evenly arranged on the outer surface of the sliding column. According to the underwater pile protection device, the multiple staggered cylinders can achieve the uniform protection effect on the bottom of the underwater pile, the multiple staggered diversion assemblies can achieve the uniform protection effect on the pile body of the underwater pile, and then the protection integrity and uniformity can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of water scour protection, and in particular to an underwater pile foundation scour protection device. Background Art

[0002] Underwater pile foundation refers to a foundation structure located below the water surface and mainly composed of piles. It can bear huge loads and provide strong support for the buildings set on it. In order to enhance the stability of underwater pile foundations and extend their service life, the pile foundations will be designed with protective structures that are protected from water erosion. Taking the underwater foundation project on the shore as an example, when building a shore viewing house, some people will throw a large number of stones or gravel around the pile foundation to form a protective barrier, but this method is difficult to ensure the construction accuracy and the uniformity of protection is also difficult to control, which will affect the anti-scouring effect; others will use sand or other fine-grained materials to cover the pile foundation to form a protective layer, but this method is inconvenient to obtain materials and has more construction links, which will increase the difficulty and cost of construction. In addition, the existing protective measures also have the following problems: it is not easy to inspect and maintain. When the protective structure is found to be damaged or invalid, it is not easy to repair or replace it in time; most of them only protect the bottom of the pile and ignore the protection of the pile body, which will affect the overall anti-scouring ability. Summary of the invention

[0003] In view of this, an object of the present invention is to provide an underwater pile foundation scour protection device to solve the problems of uneven protection, incomplete protection, complex construction and maintenance in the prior art.

[0004] The present invention is achieved through the following technical solutions:

[0005] The underwater pile foundation scour protection device comprises an underwater pile, the bottom of which has a foundation main pile, and is characterized in that: a protective sleeve is built on the outer surface of the underwater pile, and a foundation bottom pile is built on the outer surface of the bottom of the foundation main pile;

[0006] The foundation bottom pile is connected with a plurality of cylinders arranged staggered along the periphery of the foundation main pile, the top of the cylinder is provided with a cover, and the outer surface of the cylinder is provided with a plurality of flow holes which can be connected with the inner cavity thereof;

[0007] The protective sleeve is detachably sleeved with a support frame that can move up and down relative to the protective sleeve, and the support frame is detachably connected with a plurality of flow diversion components, the flow diversion components include a steel cable connected to the support frame at the top, a plurality of longitudinally arranged flow diversion components are sleeved on the steel cable, and the bottom end of the steel cable passes through the cover and is connected to a counterweight located in the column;

[0008] The flow dividing member comprises a sliding column sleeved on the steel cable, and at least three flow dividing protrusions are evenly arranged on the outer surface of the sliding column.

[0009] Furthermore, a tail wing is disposed on the outer surface of the sliding column and is staggered with the diverter protrusion.

[0010] Furthermore, the top and bottom ends of the sliding column are both provided with isolation limiting rings sleeved on the steel cable.

[0011] Furthermore, the outer surface of the protective sleeve is provided with a plurality of longitudinally arranged sliding grooves;

[0012] The support frame includes a support tube which is sleeved on the protective sleeve and can move up and down relative to the protective sleeve, and a support frame body connected to the bottom end of the support tube, and the steel cable is detachably connected to the support frame body;

[0013] The inner wall of the support tube is provided with a sliding protrusion that can cooperate with the slide groove;

[0014] The top end of the support tube is connected with a floating block located on the periphery of the protection sleeve.

[0015] Furthermore, the support cylinder comprises two hinged half ring blocks, one of the half ring blocks is provided with a connecting plate A at the end, and the other half ring block is provided with a connecting plate B that can cooperate with the connecting plate A at the end;

[0016] Locking screws for connecting plate A and connecting plate B are also included.

[0017] Furthermore, the support frame body includes an outer ring frame, an inner ring frame located inside the outer ring frame, and a plurality of connecting arms distributed in an annular manner;

[0018] The outer end of the connecting arm is connected to the outer ring frame, the middle area of ​​the connecting arm is connected to the inner ring frame, and the inner end of the connecting arm is connected to the bottom end of the supporting tube through a connecting piece;

[0019] A plurality of fixing frames are arranged on the outer ring frame and the inner ring frame along the circumferential direction thereof, and the fixing frames on the outer ring frame and the fixing frames on the inner ring frame are arranged staggered in the circumferential direction;

[0020] The steel cable is connected to the fixing frame through a fixing component.

[0021] Furthermore, the outer ring frame and the inner ring frame are provided with notches at the inner side ends of the fixing frame;

[0022] The fixing assembly includes a fixing block, the bottom end of which is connected to a threaded connection column passing through a notch, the top end of the steel cable is threadedly connected to the bottom end of the threaded connection column, the fixing frame is provided with a through hole B, and the fixing block is provided with a through hole A;

[0023] The fixing assembly also includes a fixing screw passing through the through hole B and the through hole A.

[0024] Furthermore, a plurality of side floating blocks are installed on both the outer ring frame and the inner ring frame.

[0025] Furthermore, the top and bottom ends of the protective sleeve are both provided with limiting rings to prevent the sliding protrusion from detaching.

[0026] Furthermore, a plurality of flow-slowing protrusions which are staggered with the flow holes are arranged on the outer surface of the column.

[0027] The beneficial effects of the present invention are:

[0028] 1. In the present invention, a plurality of staggered columns can uniformly protect the bottom of the underwater pile (foundation main pile), and a plurality of groups of staggered diversion components can uniformly protect the pile body of the underwater pile. Specifically, when the water flow scours the bottom of the underwater pile, the water flow can be diverted and slowed down by the arrangement of the columns, so as to reduce the scouring effect of the water flow on the bottom of the underwater pile; when the water flow scours the pile body of the underwater pile, the diversion protrusion can be arranged to divert and slow down the water flow, thereby reducing the scouring effect of the water flow on the pile body of the underwater pile;

[0029] 2. In the present invention, both the upper floating block and the side floating block are made of light floating materials. When the support tube is assembled on the protective sleeve, under the action of the upper floating block and the side floating block, the support tube can be adaptively moved (within a certain range) according to the height of the water surface layer a to better protect the pile body of the underwater pile. The cooperation between the sliding protrusion and the slide groove can improve the stability of the support tube moving up and down relative to the protective sleeve.

[0030] 3. In the present invention, the support tube and the fixing assembly are both detachable structures, and the diverter is made of a light floating material, so that the diverter assembly can be easily assembled and the diverter can be replaced, so as to facilitate the subsequent maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the underwater pile foundation scour protection device of the present invention;

[0032] Figure 2 It is a front view structural schematic diagram of the underwater pile foundation scour protection device of the present invention;

[0033] Figure 3 It is a schematic diagram of the three-dimensional structure of the support frame of the underwater pile foundation scour protection device of the present invention;

[0034] Figure 4 It is a schematic diagram of the three-dimensional structure of the column of the underwater pile foundation scour protection device of the present invention;

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the support frame of the underwater pile foundation scour protection device of the present invention;

[0036] Figure 6 It is a schematic diagram of the top view of the foundation pile of the underwater pile foundation scour protection device of the present invention;

[0037] Figure 7 The invention provides an underwater pile foundation scour protection device. Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0038] Figure 8 It is a schematic diagram of the three-dimensional structure of the fixed block of the underwater pile foundation scour protection device of the present invention;

[0039] Fig. 9 It is a schematic diagram of the overall structure of the semi-ring block of the underwater pile foundation scour protection device of the present invention;

[0040] Fig.10 It is a schematic diagram of the three-dimensional structure of the diverter of the underwater pile foundation scour protection device of the present invention;

[0041] Fig.11 It is a schematic diagram of the three-dimensional structure of the steel cable connected to the underwater pile foundation scour protection device of the present invention;

[0042] Fig.12 It is a schematic diagram of the three-dimensional structure of the protective sleeve of the underwater pile foundation scour protection device of the present invention;

[0043] Fig.13 It is a bottom view of the support tube and the support frame body of the underwater pile foundation scour protection device of the present invention;

[0044] Fig.14 It is a schematic diagram of the top view of the foundation pile of the underwater pile foundation scour protection device of the present invention;

[0045] Fig.15 It is a schematic diagram of the three-dimensional structure of the column of the underwater pile foundation scour protection device of the present invention.

[0046] In the figure: 1, underwater pile; 2, floating block; 3, supporting frame; 31, outer ring frame; 32, inner ring frame; 33, notch; 34, connecting arm; 35, connecting piece; 36, half ring block; 37, locking screw; 38, connecting plate A; 39, sliding protrusion; 310, welding line; 311, connecting plate B; 4, side floating block; 5, diverter; 51, sliding column; 52, diverter protrusion; 53, sliding through hole; 54 , isolation limit ring; 55, tail wing; 6, fixing assembly; 61, fixing block; 62, through hole A; 63, fixing screw; 64, fixing frame; 65, threaded connection column; 66, through hole B; 7, steel cable; 8, cylinder column; 81, flow hole; 82, slow flow protrusion; 9, cover; 10, foundation main pile; 11, counterweight block; 12, foundation bottom pile; 13, protective sleeve; 14, slide groove; 15, limiting ring. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0052] See also Figure 1-15 , the present invention provides a technical solution:

[0053] The underwater pile foundation scour protection device comprises an underwater pile 1, the bottom of the underwater pile 1 has a foundation main pile 10, and is characterized in that: the outer surface of the underwater pile 1 is built with a protective sleeve 13, and the outer surface of the bottom of the foundation main pile 10 is built with a foundation bottom pile 12;

[0054] The foundation bottom pile 12 is connected to a plurality of cylinders 8 arranged staggered along the periphery of the foundation main pile 10. The top of the cylinder 8 is provided with a cover 9. The outer surface of the cylinder 8 is provided with a plurality of flow holes 81 which can communicate with the inner cavity thereof.

[0055] The protective sleeve 13 is detachably sleeved with a support frame 3 that can move up and down relative to the protective sleeve 13, and the support frame 3 is detachably connected with a plurality of flow diversion components, the flow diversion components include a steel cable 7 connected to the support frame 3 at the top, a plurality of longitudinally arranged flow diversion components 5 are sleeved on the steel cable 7, and the bottom end of the steel cable 7 passes through the cover 9 and is connected to a counterweight block 11 located in the column 8;

[0056] The flow dividing member 5 comprises a sliding column 51 sleeved on the steel cable 7 , and at least three flow dividing protrusions 52 are evenly arranged on the outer surface of the sliding column 51 .

[0057] In this embodiment, the bottom end of the foundation main pile 10 is connected to the riverbed, the foundation bottom pile 12 is located in the riverbed area, and the protective sleeve 13 is built at the water level area during the flood period. The height of the protective sleeve 13 covers the past water level area best, such as Figure 2 As shown, a is the water surface layer, and b is the riverbed layer. When used, a number of staggered columns 8 can uniformly protect the bottom of the underwater pile 1 (the main foundation pile 10), and a number of groups of staggered diversion components can uniformly protect the body of the underwater pile 1. Specifically, when the water flow scours the bottom of the underwater pile 1, the water flow can be diverted and slowed down by the setting of the column 8 to reduce the scouring effect of the water flow on the bottom of the underwater pile 1; when the water flow scours the body of the underwater pile 1, the diversion protrusion 52 can be used to divert and slow down the aforementioned water flow, thereby reducing the scouring effect of the water flow on the body of the underwater pile 1. Among them, the setting of the column 8 can also limit the counterweight block 11 to prevent the counterweight block 11 from shaking under the action of the water flow and affecting the diversion effect of the diversion component.

[0058] like Figure 6 As shown, sixteen cylinders 8 may be staggeredly arranged on the foundation bottom pile 12 to protect the bottom of the underwater pile 1 (the foundation main pile 10); sixteen groups of diversion components are also staggeredly arranged on the supporting frame to protect the pile body of the underwater pile 1.

[0059] The sliding column 51 is provided with a sliding through hole 53 for the steel cable 7 to pass through.

[0060] Preferably, the outer surface of the sliding column 51 is also provided with a tail wing 55 which is staggered with the diverting protrusion 52. When the water flow flushes the diverting member, the water flow will act on the tail wing 55 with a larger force bearing area, so that the sliding column 51 can rotate according to the flushing direction of the water flow to release the water flow energy, and finally achieve the effect of diverting and slowing down the flow.

[0061] To facilitate maintenance of the diverter assembly, the diverter 5 can be made of lightweight floating material, so that when the counterweight 11 is removed, the diverter 5 can float on the water surface, which makes it easy for operators to replace each failed or damaged diverter 5.

[0062] Preferably, the top and bottom ends of the sliding column 51 are both provided with an isolation limit ring 54 sleeved on the steel cable 7. The provision of the isolation limit ring 54 allows each diverter to rotate independently to adapt to the scouring of water flows at different depths to enhance the integrity of the protection. In addition, the isolation limit ring 54 can be used to limit the height position of the diverter 5, so that the height position of each diverter 5 can be adjusted according to the relative relationship between the water surface layer and the underwater pile 1.

[0063] Preferably, the outer surface of the protective sleeve 13 is provided with a plurality of longitudinally arranged sliding grooves 14;

[0064] The support frame 3 includes a support tube which is sleeved on the protective sleeve 13 and can move up and down relative to the protective sleeve 13, and a support frame body connected to the bottom end of the support tube, and the steel cable 7 is detachably connected to the support frame body;

[0065] The inner wall of the support tube is provided with a sliding protrusion 39 that can cooperate with the slide groove 14;

[0066] The top end of the support tube is connected to a floating block 2 located outside the protective sleeve 13 .

[0067] In this embodiment, the floating block 2 is made of light floating material. When used, when the support tube is assembled on the protective sleeve 13, under the support of the floating block 2, the support tube can be adaptively moved (within a certain range) according to the height of the water surface layer a to better protect the pile body of the underwater pile 1. The cooperation between the sliding protrusion 39 and the slide groove 14 can improve the stability of the support tube moving up and down relative to the protective sleeve 13.

[0068] The sliding protrusion 39 can be rotatably arranged on the inner wall of the support tube by using a roller. In this way, when the support tube moves up and down relative to the protective sleeve 13, the roller can form rolling friction with the slide groove 14 to improve the sensitivity of the up and down movement.

[0069] Preferably, the top and bottom ends of the protective sleeve 13 are both provided with a limiting ring 15 to prevent the sliding protrusion 39 from being separated. The setting of the limiting ring 15 can prevent the support tube from being separated from the protective sleeve 13.

[0070] Preferably, the support cylinder includes two hinged half ring blocks 36, one of the half ring blocks 36 is provided with a connecting plate A38 at its end, and the other half ring block 36 is provided with a connecting plate B311 that can cooperate with the connecting plate A38 at its end;

[0071] Also included are locking screws 37 for connecting plate A 38 and connecting plate B 311 .

[0072] In this embodiment, the locking screw 37 penetrates the connecting plate B311 and the connecting plate A38 to realize the connection of the two half ring blocks 36. Such arrangement can facilitate the assembly and disassembly operation of the support tube and the protective sleeve 13, so as to facilitate the later maintenance.

[0073] Preferably, the support frame body includes an outer ring frame 31, an inner ring frame 32 located inside the outer ring frame 31, and a plurality of connecting arms 34 distributed in an annular manner;

[0074] The outer end of the connecting arm 34 is connected to the outer ring frame 31, the middle area of ​​the connecting arm 34 is connected to the inner ring frame 32, and the inner end of the connecting arm 34 is connected to the bottom end of the support tube through a connecting piece 35;

[0075] A plurality of fixing frames 64 are arranged on the outer ring frame 31 and the inner ring frame 32 along the circumferential direction thereof, and the fixing frames 64 on the outer ring frame 31 and the fixing frames 64 on the inner ring frame 32 are arranged in an offset manner in the circumferential direction;

[0076] The steel cable 7 is connected to the fixing frame 64 via the fixing assembly 6 .

[0077] In this embodiment, the setting of the outer ring frame 31 and the inner ring 32 distributes each diversion component into an outer protective ring and an inner protective ring, and evenly distributes each diversion component on each layer, so that the pile body of the underwater pile 1 can be protected more evenly and comprehensively; in addition, with the same number of diversion components, the protection density of the inner protective ring can be higher than the protection density of the outer protective ring, so that the water flow can be made to flow in a direction away from the pile body of the underwater pile 1, ultimately playing the effect of reducing the scouring of the water flow.

[0078] Similarly, a number of cylinders 8 are also allocated to outer protection rings and inner protection rings, and the protection density of the inner protection ring is higher than that of the outer protection ring, such as Figure 6 As shown, in this way, the water flow can be made to flow in a direction away from the bottom of the underwater pile 1, thereby finally reducing the scouring effect of the water flow.

[0079] The outer ring frame 31 and the inner ring frame 32 can be welded together by a plurality of arc-shaped connecting frames, and a welding line 310 is formed at the connection.

[0080] Preferably, a plurality of side floating blocks 4 are installed on both the outer ring frame 31 and the inner ring frame 32 .

[0081] In this embodiment, the side floating blocks 4 should be made of lightweight floating materials. Through the cooperation between the side floating blocks 4 and the upper floating blocks 2, they can jointly play the role of a floating support skeleton, so that each diversion component can adjust its height adaptively according to the height of the water surface layer a, thereby achieving a good protective effect.

[0082] Preferably, a notch 33 is formed on the outer ring frame 31 and the inner ring frame 32 at the inner side end of the fixing frame 64;

[0083] The fixing assembly 6 includes a fixing block 61, the bottom end of the fixing block 61 is connected to a threaded connection column 65 passing through the notch 33, the top end of the steel cable 7 is threadedly connected to the bottom end of the threaded connection column 65, the fixing frame 64 is provided with a through hole B66, and the fixing block 61 is provided with a through hole A62;

[0084] The fixing assembly 6 further includes a fixing screw 63 passing through the through hole B66 and the through hole A62.

[0085] In this embodiment, by providing the fixing component 6, it is convenient to install and separate the flow components, so as to facilitate subsequent maintenance.

[0086] Preferably, if Fig.14 and Fig.15 As shown, the outer surface of the column 8 is also provided with a plurality of slow-flow protrusions 82 which are staggered with the flow holes 81. In this embodiment, the slow-flow protrusions 82 can increase the friction between the column 8 and the water flow, so as to release the water flow energy, play a slow-flow effect, and finally improve the protection effect on the bottom of the underwater pile 1.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An underwater pile foundation scour protection device, comprising an underwater pile (1), wherein the bottom of the underwater pile (1) has a foundation main pile (10), and is characterized in that: The outer surface of the underwater pile (1) is built with a protective sleeve (13), and the outer surface of the bottom of the foundation main pile (10) is built with a foundation bottom pile (12); A plurality of cylinders (8) are connected to the foundation bottom pile (12) and are arranged staggered along the periphery of the foundation main pile (10). The top of the cylinder (8) is provided with a cover (9). The outer surface of the cylinder (8) is provided with a plurality of flow holes (81) that can communicate with the inner cavity thereof. A support frame (3) is detachably sleeved on the protective sleeve (13) and can move up and down relative to the protective sleeve (13). A plurality of flow diversion components are detachably connected to the support frame (3). The flow diversion components include a steel cable (7) connected to the support frame (3) at the top end, a plurality of longitudinally arranged flow diversion components (5) are sleeved on the steel cable (7), and the bottom end of the steel cable (7) passes through a cover (9) and is connected to a counterweight block (11) located in the column (8); The flow dividing member (5) comprises a sliding column (51) sleeved on the steel cable (7), and at least three flow dividing protrusions (52) are evenly arranged on the outer surface of the sliding column (51).

2. The underwater pile foundation scour protection device according to claim 1, characterized in that: The outer surface of the sliding column (51) is also provided with a tail wing (55) which is arranged offset from the diverter protrusion (52).

3. The underwater pile foundation scour protection device according to claim 1, characterized in that: The top and bottom ends of the sliding column (51) are both provided with isolation limiting rings (54) sleeved on the steel cable (7).

4. The underwater pile foundation scour protection device according to claim 1, characterized in that: The outer surface of the protective sleeve (13) is provided with a plurality of longitudinally arranged sliding grooves (14); The support frame (3) comprises a support tube which is sleeved on the protective sleeve (13) and can move up and down relative to the protective sleeve (13), and a support frame body connected to the bottom end of the support tube, and the steel cable (7) is detachably connected to the support frame body; The inner wall of the support tube is provided with a sliding protrusion (39) that can cooperate with the slide groove (14); The top end of the support tube is connected to a floating block (2) located on the periphery of the protection sleeve (13).

5. The underwater pile foundation scour protection device according to claim 4, characterized in that: The support cylinder comprises two hinged half ring blocks (36), one of the half ring blocks (36) is provided with a connecting plate A (38) at the end, and the other half ring block (36) is provided with a connecting plate B (311) that can cooperate with the connecting plate A (38) at the end; Also included are locking screws (37) for connecting plate A (38) and connecting plate B (311).

6. The underwater pile foundation scour protection device according to claim 4, characterized in that: The support frame body comprises an outer ring frame (31), an inner ring frame (32) located inside the outer ring frame (31), and a plurality of connecting arms (34) distributed in an annular manner; The outer end of the connecting arm (34) is connected to the outer ring frame (31), the middle area of ​​the connecting arm (34) is connected to the inner ring frame (32), and the inner end of the connecting arm (34) is connected to the bottom end of the supporting tube through a connecting piece (35); A plurality of fixing frames (64) are arranged on the outer ring frame (31) and the inner ring frame (32) along the circumferential direction thereof, and the fixing frames (64) on the outer ring frame (31) and the fixing frames (64) on the inner ring frame (32) are arranged in an offset manner in the circumferential direction; The steel cable (7) is connected to the fixing frame (64) via a fixing assembly (6).

7. The underwater pile foundation scour protection device according to claim 4, characterized in that: The outer ring frame (31) and the inner ring frame (32) are provided with a notch (33) at the inner side end of the fixing frame (64); The fixing assembly (6) comprises a fixing block (61), the bottom end of the fixing block (61) is connected to a threaded connection column (65) passing through the notch (33), the top end of the steel cable (7) is threadedly connected to the bottom end of the threaded connection column (65), the fixing frame (64) is provided with a through hole B (66), and the fixing block (61) is provided with a through hole A (62); The fixing assembly (6) further comprises a fixing screw (63) passing through the through hole B (66) and the through hole A (62).

8. The underwater pile foundation scour protection device according to claim 4, characterized in that: A plurality of side floating blocks (4) are installed on both the outer ring frame (31) and the inner ring frame (32).

9. The underwater pile foundation scour protection device according to claim 4, characterized in that: The top and bottom ends of the protective sleeve (13) are both provided with limiting rings (15) for preventing the sliding protrusion (39) from detaching.

10. The underwater pile foundation scour protection device according to any one of claims 1 to 9, characterized in that: The outer surface of the column (8) is also provided with a plurality of slow-flow protrusions (82) which are arranged offset from the flow holes (81).

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