Water conservancy river channel slope protection structure
By dispersing the impact of water flow through diversion and cleaning mechanisms, the problems of vegetation damage and soil loss in the slope protection structure of water conservancy channels have been solved, thereby improving the stability of the slope and the unobstructed flow of the diversion channel.
Patent Information
- Application Number
- CN202511235860.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-01
- Publication Date
- 2025-11-14
AI Technical Summary
Existing riverbank protection structures are prone to vegetation damage, soil erosion, and damage to concrete cover layers under the impact of large water flows, thus reducing slope stability.
The system employs a diversion and cleaning mechanism, including slope protection components, diversion channels, connecting pipes, rotating shafts, and a cleaning mechanism, to reduce the direct impact and blockage of water flow on the slope by dispersing the water flow impact force, diverting water in sections, and clearing debris.
It effectively disperses the impact force of water flow, reduces vegetation damage and soil erosion, improves the shear strength of the slope, extends the service life of the slope protection structure, and ensures unobstructed drainage channels.
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Figure CN120945836A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water conservancy protection technology, specifically to a water conservancy riverbank protection structure. Background Technology
[0002] Water conservancy channels are river passages that have undergone artificial intervention, planning, design, and construction of natural river channels to meet the needs of flood control, drainage, irrigation, water supply, navigation, and ecological maintenance.
[0003] In existing technologies, riverbank protection structures typically employ a concrete covering on steep slopes, with vegetation laid within vegetated areas to prevent soil erosion. However, due to the steep slope, strong water flow at the top causes water to rush down the slope, repeatedly eroding the vegetated areas at the base. This strong impact directly damages the vegetation, causing leaf drop and even uprooting, severely impacting normal growth and ecological function. The repeated erosion also leads to soil loss. Soil is fundamental for vegetation growth; soil loss weakens root anchorage, further exacerbating degradation and creating a vicious cycle. Prolonged erosion can also cause wear, cracks, and even damage to the concrete covering. This not only weakens the protective effect of the concrete overlay, but may also allow moisture to seep into the slope, causing softening, swelling, and other adverse changes within the slope. The combined effect of damage to the vegetation zone and the concrete overlay reduces the overall stability of the slope. Summary of the Invention
[0004] The purpose of this invention is to provide a water conservancy riverbank protection structure to solve the problems mentioned in the background art.
[0005] The technical solution adopted by this application to solve its technical problem is: a water conservancy river channel slope protection structure, comprising: a slope body, wherein a plurality of diversion channels are provided on the slope body, and further comprising:
[0006] A diversion mechanism is provided on a slope. The diversion mechanism includes a slope protection component provided on the slope. The slope protection component includes a first slope protection layer, a second slope protection layer, and a third slope protection layer. The third slope protection layer is located at the top of the slope. A diversion frame is provided on the third slope protection layer. A grid plate is provided on the diversion frame. The diversion mechanism is used to divert water flow and prevent erosion of the slope.
[0007] A cleaning mechanism is provided on the diversion mechanism. The cleaning mechanism includes a connecting plate located at the bottom of the grid plate. The connecting plate is provided with several partitions. The size of the partitions is adapted to the size of the gaps between the grid plates. The cleaning mechanism is used to clean debris on the diversion mechanism to prevent blockage.
[0008] Preferably, the first slope protection layer of the slope protection component is set on the inclined section of the slope. The first slope protection layer of the slope protection component has several partitions on the side close to the slope. The partitions are horizontally distributed. The first slope protection layer has several planting frames equidistantly opened on the side away from the slope. The planting frames are covered with vegetation layers.
[0009] Preferably, the two ends of the planting frame are connected to the first slope protection layer by drainage channels, and the drainage points of the drainage channels are located on both sides of the planting frame. The drainage channels on both sides of the planting frame are distributed in a figure-eight shape and are interconnected.
[0010] Preferably, the second slope protection layer of the slope protection component is located at a lower elevation section of the slope. A water collection cavity is provided in the middle of the second slope protection layer. Drainage holes are symmetrically opened on both sides of the water collection cavity, and drainage pipes are connected to the drainage holes.
[0011] Preferably, the third slope protection layer of the slope protection component further includes a connecting pipe disposed on the drainage channel, wherein a drainage pipe is fixedly disposed at one end of the connecting pipe, and the drainage pipe is funnel-shaped.
[0012] Preferably, the other end of the connecting pipe is connected to the water collection chamber, and a rotating shaft is rotatably provided in the middle of the connecting pipe. Several arc-shaped blades are fixedly provided on the rotating shaft, and the arc-shaped blades are arranged in a circumferential array.
[0013] Preferably, the cleaning mechanism further includes solar streetlights symmetrically arranged in the first slope protection layer and through holes one and two on the grating plate. A motor is provided above the through hole one, and the motor is fixedly connected to the grating plate. The motor's driving power comes from the solar streetlights.
[0014] Preferably, the motor is rotatably provided with an output shaft, which extends through the through hole and into the flow guide frame. A fixing plate is fixedly and symmetrically provided in the flow guide frame, and an inclined block is rotatably provided on the fixing plate. The inclined block is fixedly sleeved on the outer surface of the output shaft.
[0015] Preferably, a through rod is slidably disposed inside the second through hole, a limit block is fixedly disposed on the outer surface of the through rod, an elastic element is sleeved on the through rod, the elastic element is located between the limit block and the grid plate, and a ball is slidably disposed at the bottom of the through rod, the bottom of the ball being attached to the inclined block.
[0016] Preferably, the grid plate has symmetrically formed movable grooves, and a movable plate is slidably disposed in the movable groove. The top end of the movable plate is fixedly connected to the top end of the through rod, and the bottom end of the movable plate is fixedly connected to the connecting plate.
[0017] The beneficial effects of this application are:
[0018] This application provides a slope protection structure for a water conservancy channel. It uses a layered structure to separate the soil into horizontal ribs, effectively dispersing the impact of water flow and preventing soil collapse due to localized stress concentration. Simultaneously, the layer provides lateral growth space for vegetation roots, forming a composite reinforcement system of "roots-layers-soil," significantly improving the slope's shear strength. Finally, drainage channels drain accumulated water from the planting frames, preventing prolonged soaking of the vegetation layer and repeated scouring of the bottom vegetation layer by backflow. The drainage mechanism segments the water flow on the slope, dispersing it along different paths to reduce the flow rate along a single path, thereby reducing the direct and repeated impact of water flow on the slope and preventing scouring and washing effects.
[0019] This application provides a riverbank protection structure that guides water to a collection chamber via a connecting pipe. When water flows through the connecting pipe, it impacts arc-shaped blades, driving a rotating shaft to rotate. This process converts part of the water flow's kinetic energy into the shaft's mechanical energy, thus slowing the water flow. The rotation of the shaft and the array of arc-shaped blades help disperse the impact force of the water flow, reducing direct impact on the connecting pipe and the collection chamber. The funnel-shaped design of the diversion pipe and the guiding effect of the connecting pipe improve the efficiency of water collection and diversion.
[0020] This application provides a water conservancy riverbank protection structure that uses solar streetlights to store energy during periods of abundant sunlight. Then, during the rainy season or when the water flow is large, the motor is started, causing the motor output shaft to drive the inclined block to rotate. Under the influence of the inclined surface of the inclined block, the through rod is squeezed, causing the through rod to move up and down, while simultaneously causing the movable plate to move up and down in the movable groove. At the same time, the spacer of the connecting plate reciprocates. Because the diversion frame is set at an inclination, when the spacer is in contact with the top of the grid plate, it lifts up the debris above the grid plate and washes it away with the water flow, preventing the diversion mechanism from being blocked.
[0021] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. These will be further described in detail below with reference to figures. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the second slope protection layer of the present invention;
[0024] Figure 3 This is a schematic diagram of the overall exploded structure of the present invention;
[0025] Figure 4 This is a schematic diagram showing the slope protection component of the present invention from different perspectives;
[0026] Figure 5 This is a schematic diagram of the overall transverse cross-section structure of the present invention;
[0027] Figure 6 This is a partial structural diagram of the cleaning mechanism of the present invention;
[0028] Figure 7 This is a schematic diagram of the grating structure of the present invention;
[0029] Figure 8 This is a schematic diagram of a partial explosion structure of the cleaning mechanism of the present invention.
[0030] Drawing number explanation:
[0031] 1. Slope; 2. Drainage channel; 3. Drainage mechanism; 4. First slope protection layer; 5. Interlayer; 6. Planting frame; 7. Vegetation layer; 8. Drainage trough; 9. Second slope protection layer; 10. Water collection chamber; 11. Drainage hole; 12. Drainage pipe; 13. Third slope protection layer; 14. Drainage frame; 15. Grating plate; 16. Connecting pipe; 17. Drainage pipe; 18. Rotating shaft; 19. Arc-shaped blade; 20. Cleaning mechanism; 21. Solar street light; 22. Through hole one; 23. Through hole two; 24. Motor; 25. Output shaft; 26. Fixing plate; 27. Inclined block; 28. Through rod; 29. Limiting block; 30. Elastic element; 31. Ball bearing; 32. Movable groove; 33. Movable plate; 34. Connecting plate; 35. Spacer. Detailed Implementation
[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0034] Please refer to the details. Figures 1 to 5A water conservancy river channel slope protection structure includes: a slope 1, on which a plurality of diversion channels 2 are provided; the water conservancy river channel slope protection structure further includes: a diversion mechanism 3, which is provided on the slope 1, and includes a slope protection component provided on the slope 1. The slope protection component includes a first slope protection layer 4, a second slope protection layer 9 and a third slope protection layer 13. The third slope protection layer 13 is provided at the top of the slope 1, and a diversion frame 14 is provided on the third slope protection layer 13. A grid plate 15 is provided on the diversion frame 14. The diversion mechanism 3 is used for water diversion and to prevent erosion of the slope 1.
[0035] It should be noted that the top of the drainage frame 14 is set in an inclined shape, which helps to reduce the direct impact of water flow on the drainage frame 14, thereby extending the service life of the structure, while promoting smoother water flow into the drainage channel 2 and improving drainage efficiency.
[0036] In the above embodiment, the water flow on the slope 1 is diverted in segments by the diversion mechanism 3, dispersing the water flow to different paths and reducing the water flow on a single path. This reduces the direct impact of the water flow on the slope 1, preventing scouring and washing of the slope 1. Segmented diversion helps control the water flow velocity, preventing high-speed scouring on the slope 1, improving the overall effectiveness of the riverbank protection, and extending its service life.
[0037] The first slope protection layer 4 of the slope protection component is set on the inclined section of the slope 1. Several partition layers 5 are set on the side of the first slope protection layer 4 closest to the slope 1. The partition layers 5 are horizontally distributed. Several planting frames 6 are equidistantly opened on the side of the first slope protection layer 4 away from the slope 1. The planting frames 6 are filled with vegetation layers 7. The two ends of the planting frames 6 are connected to the drainage channels 8 on the first slope protection layer 4. The drainage points of the drainage channels 8 are located on both sides of the planting frames 6. The drainage channels 8 on both sides of the planting frames 6 are distributed in a figure-eight shape and are interconnected.
[0038] In the above embodiment, the soil is separated into layers by the partition layer 5, and then the slope protection components are laid to form a transverse rib structure. The horizontal layering effectively disperses the impact force of water flow, preventing the soil of slope 1 from collapsing due to localized stress concentration. At the same time, the partition layer 5 provides lateral growth space for the vegetation roots, forming a composite reinforcement system of "roots-partition layer 5-soil", which significantly improves the shear strength of slope 1. Finally, the drainage channel 8 drains the accumulated water in the planting frame 6, preventing water from soaking the vegetation layer 7 for a long time and preventing backwater from repeatedly scouring the bottom vegetation layer 7.
[0039] The second slope protection layer 9 of the slope protection component is located at the lower elevation section of the slope 1. A water collection chamber 10 is provided in the middle of the second slope protection layer 9. Drainage holes 11 are symmetrically opened on both sides of the water collection chamber 10, and drainage pipes 12 are connected to the drainage holes 11. The third slope protection layer 13 of the slope protection component also includes a connecting pipe 16 provided on the drainage channel 2. A drainage pipe 17 is fixedly provided at one end of the connecting pipe 16. The drainage pipe 17 is funnel-shaped. The other end of the connecting pipe 16 is connected to the water collection chamber 10. A rotating shaft 18 is rotatably provided in the middle of the connecting pipe 16. Several arc-shaped blades 19 are fixedly provided on the rotating shaft 18. The arc-shaped blades 19 are arranged in a circumferential array.
[0040] In the above embodiment, the drainage pipe 17 collects water flow from the drainage frame 14 at the top of the slope 1 through its funnel-shaped structure, and guides it to the water collection chamber 10 through the connecting pipe 16. When the water flows through the connecting pipe 16, it impacts the arc-shaped blades 19, driving the rotating shaft 18 to rotate. This process converts part of the kinetic energy of the water flow into the mechanical energy of the rotating shaft 18, slowing down the water flow velocity. The rotation of the rotating shaft 18 and the array arrangement of the arc-shaped blades 19 help to disperse the impact force of the water flow, reducing the direct impact on the connecting pipe 16 and the water collection chamber 10. The funnel-shaped design of the drainage pipe 17 and the guiding effect of the connecting pipe 16 improve the efficiency of water collection and drainage. Through energy conversion and dispersion of impact force, the scouring and erosion of the top of the slope 1 by the water flow is reduced. The design of the rotating shaft 18 and the arc-shaped blades 19 helps to buffer the impact of the water flow, extending the service life of the slope protection structure.
[0041] Please refer to the details. Figure 1 as well as Figures 6 to 8 A water conservancy river channel slope protection structure further includes: a cleaning mechanism 20, which is installed on the diversion mechanism 3. The cleaning mechanism 20 includes a connecting plate 34 installed at the bottom of the grid plate 15. The connecting plate 34 is provided with a plurality of spacers 35. The size of the spacers 35 is adapted to the size of the gap between the grid plates 15. The cleaning mechanism 20 is used to clean the debris on the diversion mechanism 3 to avoid blockage.
[0042] In the above embodiment, the cleaning mechanism 20 repeatedly cleans the debris on the grid plate 15 to prevent the drainage mechanism 3 from being blocked. As the first drainage step of the drainage mechanism 3, the grid plate 15 easily accumulates debris such as leaves, branches, and garbage. The cleaning mechanism 20 removes these obstacles in a timely manner through reciprocating motion, ensuring that the drainage channel 2 is always unobstructed.
[0043] The cleaning mechanism 20 also includes through holes 22 and 23 symmetrically arranged on the solar streetlights 21 and the grid plate 15 of the first slope protection layer 4. A motor 24 is installed above the through hole 22 and is fixedly connected to the grid plate 15. The motor 24 is powered by the solar streetlights 21. An output shaft 25 is rotatably mounted on the motor 24. The output shaft 25 passes through the through hole 22 and extends into the diversion frame 14. A fixing plate 26 is symmetrically fixed inside the diversion frame 14. An inclined block 27 is rotatably mounted on the fixing plate 26 and is fixedly sleeved on the outer surface of the output shaft 25. A through rod 28 is slidably mounted through the through hole 23. A limit block 29 is fixedly mounted on the outer surface of the through rod 28. An elastic element 30 is sleeved on the through rod 28 and is located between the limit block 29 and the grid plate 15. A ball bearing 31 is rotatably mounted on the bottom of the through rod 28 and its bottom is attached to the inclined block 27. The grid plate 15 has symmetrically opened movable grooves 32, and a movable plate 33 is slidably arranged in the movable groove 32. The top end of the movable plate 33 is fixedly connected to the top of the through rod 28, and the bottom end of the movable plate 33 is fixedly connected to the connecting plate 34.
[0044] In the above embodiment, the solar street light 21 stores energy during periods of abundant sunlight. Then, during the rainy season or when the water flow is large, the motor 24 is started, causing the output shaft 25 of the motor 24 to drive the tilting block 27 to rotate. Under the influence of the tilting surface of the tilting block 27, the through rod 28 is squeezed, causing the through rod 28 to move up and down, while simultaneously causing the movable plate 33 to move up and down in the movable groove 32. At the same time, the spacer 35 of the connecting plate 34 moves back and forth. Since the drainage frame 14 is tilted, when the spacer 35 is attached to the top of the grid plate 15, it lifts up the debris above the grid plate 15 and washes the debris off its top with water flow, preventing the drainage mechanism 3 from being blocked.
[0045] Through all the above embodiments, the working principle of the present invention is specifically as follows:
[0046] First, the soil layer of slope 1 is layered with a partition layer 5, which is a precast concrete slab. Then, the slope protection components of the drainage mechanism 3 are laid to cover slope 1 and partition layer 5. The partition layer 5 separates the soil layers, forming a transverse rib structure. This horizontal layering effectively disperses the impact force of the water flow, preventing the soil of slope 1 from collapsing due to localized stress concentration. At the same time, the partition layer 5 provides lateral growth space for the vegetation roots, forming a composite reinforcement system of "roots-partition layer 5-soil", significantly improving the shear strength of slope 1. Finally, the accumulated water in the planting frame 6 is drained through the drainage channel 8, preventing the water flow from soaking the vegetation layer 7 for a long time and avoiding repeated backflow scouring of the bottom vegetation layer 7. The drainage mechanism 3 diverts the water flow on slope 1 in segments, dispersing the water flow to different paths, reducing the water flow in a single path, thereby reducing the direct impact force of the water flow on slope 1 and preventing scouring and washing of slope 1. Segmented diversion helps control water flow velocity, preventing high-speed scouring on slope 1, improving the overall effectiveness of the riverbank protection, and extending its service life. Simultaneously, the diversion pipe 17, through its funnel-shaped structure, collects water from the diversion frame 14 at the top of slope 1 and guides it to the collection chamber 10 via the connecting pipe 16. When the water flows through the connecting pipe 16, it impacts the arc-shaped blades 19, driving the rotating shaft 18 to rotate. This process converts part of the water flow's kinetic energy into the mechanical energy of the rotating shaft 18, slowing down the water flow velocity. The rotation of the rotating shaft 18 and the array of arc-shaped blades 19 help disperse the impact force of the water flow, reducing direct impact on the connecting pipe 16 and the collection chamber 10. The funnel-shaped design of the diversion pipe 17 and the guiding effect of the connecting pipe 16 improve the efficiency of water collection and diversion.
[0047] Finally, the solar street light 21 stores energy during periods of abundant sunlight. Then, during the rainy season or when water flow is high, the motor 24 is activated, causing the output shaft 25 of the motor 24 to rotate the tilting block 27. Under the influence of the tilted surface of the tilting block 27, the through rod 28 is compressed, causing the through rod 28 to move up and down, simultaneously moving the movable plate 33 up and down within the movable groove 32. This also causes the spacer 35 of the connecting plate 34 to reciprocate. Because the diversion frame 14 is tilted, when the spacer 35 is in contact with the top of the grating plate 15, it lifts up debris above the grating plate 15 and washes it away with water, preventing blockage of the diversion mechanism 3. The cleaning mechanism 20 then reciprocates to clean the debris on the grating plate 15, preventing blockage of the diversion mechanism 3. As the first diversion step of the diversion mechanism 3, the grating plate 15 easily accumulates leaves, branches, garbage, and other debris. The cleaning mechanism 20, through its reciprocating motion, promptly removes these obstacles, ensuring that the diversion channel 2 remains unobstructed.
[0048] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary. Under the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
[0049] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.
Claims
1. A riverbank protection structure, comprising: The slope (1), on which a plurality of drainage channels (2) are provided, is characterized in that it further includes: The diversion mechanism (3) is set on the slope (1). The diversion mechanism (3) includes a slope protection component set on the slope (1). The slope protection component includes a first slope protection layer (4), a second slope protection layer (9) and a third slope protection layer (13). The third slope protection layer (13) is set at the top of the slope (1). A diversion frame (14) is set on the third slope protection layer (13). A grid plate (15) is set on the diversion frame (14). The diversion mechanism (3) is used to divert water flow and prevent erosion of the slope (1). The cleaning mechanism (20) is set on the diversion mechanism (3). The cleaning mechanism (20) includes a connecting plate (34) set at the bottom of the grid plate (15). The connecting plate (34) is provided with a number of partitions (35). The size of the partitions (35) is adapted to the size of the gap between the grid plate (15). The cleaning mechanism (20) is used to clean the debris on the diversion mechanism (3) to avoid blockage.
2. The water conservancy river channel slope protection structure according to claim 1, characterized in that, The first slope protection layer (4) of the slope protection component is set in the inclined section of the slope (1). The first slope protection layer (4) of the slope protection component has several partitions (5) on the side close to the slope (1). The partitions (5) are horizontally distributed. The first slope protection layer (4) has several planting frames (6) equidistantly opened on the side away from the slope (1). The planting frames (6) are covered with vegetation layers (7).
3. The water conservancy river channel slope protection structure according to claim 2, characterized in that, The planting frame (6) has drainage channels (8) at both ends on the first slope protection layer (4). The drainage points of the drainage channels (8) are located on both sides of the planting frame (6). The drainage channels (8) on both sides of the planting frame (6) are distributed in a figure-eight shape and are interconnected.
4. The water conservancy river channel slope protection structure according to claim 3, characterized in that, The second slope protection layer (9) of the slope protection component is located at a lower elevation section of the slope (1). A water collection cavity (10) is provided in the middle of the second slope protection layer (9). Drainage holes (11) are symmetrically opened on both sides of the water collection cavity (10). A drainage pipe (12) is connected to the drainage hole (11).
5. A water conservancy river channel slope protection structure according to claim 4, characterized in that, The third slope protection layer (13) of the slope protection component also includes a connecting pipe (16) set on the drainage channel (2), and a drainage pipe (17) is fixedly set at one end of the connecting pipe (16), and the drainage pipe (17) is funnel-shaped.
6. The water conservancy river channel slope protection structure according to claim 5, characterized in that, The other end of the connecting pipe (16) is connected to the water collection chamber (10). A rotating shaft (18) is rotatably provided in the middle of the connecting pipe (16). Several arc-shaped blades (19) are fixedly provided on the rotating shaft (18). The arc-shaped blades (19) are arranged in a circular array.
7. The water conservancy river channel slope protection structure according to claim 1, characterized in that, The cleaning mechanism (20) also includes a solar street light (21) symmetrically arranged on the first slope protection layer (4) and a through hole one (22) and a through hole two (23) on the grid plate (15). A motor (24) is arranged above the through hole one (22). The motor (24) is fixedly connected to the grid plate (15). The motor (24) drives the solar street light (21) with electrical energy.
8. A water conservancy river channel slope protection structure according to claim 7, characterized in that, An output shaft (25) is rotatably mounted on the motor (24). The output shaft (25) passes through the through hole (22) and extends into the drainage frame (14). A fixing plate (26) is fixedly and symmetrically mounted inside the drainage frame (14). An inclined block (27) is rotatably mounted on the fixing plate (26). The inclined block (27) is fixedly sleeved on the outer surface of the output shaft (25).
9. A water conservancy river channel slope protection structure according to claim 8, characterized in that, A through rod (28) is slidably disposed inside the second through hole (23). A limit block (29) is fixedly disposed on the outer surface of the through rod (28). An elastic element (30) is sleeved on the through rod (28). The elastic element (30) is located between the limit block (29) and the grid plate (15). A ball bearing (31) is slidably disposed at the bottom of the through rod (28). The bottom of the ball bearing (31) is attached to the inclined block (27).
10. A water conservancy river channel slope protection structure according to claim 9, characterized in that, The grid plate (15) is symmetrically provided with movable grooves (32), and a movable plate (33) is slidably provided in the movable groove (32). The top end of the movable plate (33) is fixedly connected to the top of the through rod (28), and the bottom end of the movable plate (33) is fixedly connected to the connecting plate (34).