River channel shoreline repairing method

Abstract

The invention discloses a riverway shoreline restoration method which comprises the following steps: S1, checking the bank slope type, the soil texture, the water flow velocity and the surrounding environment of a target riverway, and performing partition type selection: performing'gabion + vegetation slope protection 'on a mountain torrent influence area and a flood discharge channel; 'natural stone placement and vegetation slope protection 'are adopted in the landscape demand area and the soil stability area, and the restoration length and the material specification of each river reach are determined; s2, bank slope weeds, humus and construction waste are removed, and original soil is tamped and reinforced; s3, 'natural stone placement and vegetation slope protection ': driving the precast pile foundation into a river bank in a plum blossom shape, placing stones in a layered manner along the inner side of the precast pile foundation, and planting plants in gaps between the stones and the surface layer of a bank slope; the gabion and vegetation slope protection method comprises the steps that gabions and pile foundations are prefabricated, and the pile foundations penetrate through the bottoms of the gabions and are driven into a river bank; the gabions are filled with stones, and soil plants cover the tops of the gabions; s4, monitoring bank slope settlement, water flow scouring depth and vegetation survival rate regularly, and performing timely treatment. The stability, the anti-scouring capability and the ecological benefits of the bank slope can be continuously guaranteed.

Description

Technical Field

[0001] This invention relates to the field of riverbank restoration technology, and in particular to a method for riverbank restoration. Background Technology

[0002] In the field of river ecological management, shoreline restoration is a crucial link in maintaining the hydrological function of the watershed, ensuring flood control safety, and restoring ecological balance. With the upgrading of watershed management needs, modern river shoreline restoration must simultaneously meet multiple core requirements: it must meet basic standards for flood control and erosion prevention, typically resisting flood erosion; it must rebuild a water-land integrated ecological environment, providing habitats for organisms; and it must ensure the long-term stability of the bank slope structure to avoid functional degradation later. Especially for watersheds with different characteristics in different river sections—such as sections significantly affected by flash floods, sections serving flood control functions, and sections needing to meet landscape creation requirements—higher demands are placed on the comprehensive adaptability of restoration technologies.

[0003] Currently, the industry has developed various conventional techniques for riverbank restoration. Among these, slope protection techniques relying on the synergistic effect of vegetation and hard materials are widely used. Examples include slope protection types that combine natural materials with vegetation and those that combine mesh-structured fillers with vegetation. These techniques can achieve a preliminary integration of protection and ecology to a certain extent, and are therefore being promoted in various watershed restoration projects. However, existing technologies often struggle to tailor designs to the functional differences of different river sections (such as the degree of flash flood impact, flood control needs, and landscape positioning). They often employ a single restoration model covering the entire watershed, leading to mismatches between the protective capacity and actual erosion risk in some river sections, or a disconnect between the ecological landscape effect and regional needs. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a method for riverbank restoration.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a method for riverbank restoration, comprising the following steps: S1. Investigate the target riverbank slope type, soil quality, water flow velocity and surrounding environment, and select the appropriate type based on the results: use "gabion + vegetation slope protection" in areas affected by flash floods and flood channels; use "natural stone placement + vegetation slope protection" in areas with landscape requirements and stable soil quality, and clarify the repair length and material specifications for each river section. S2. Remove weeds, humus and construction waste from the bank slope, compact the original soil on the bank slope, and reinforce the local silt layer. S3, "Natural Stone Placement + Vegetation Slope Protection": Precast piles are driven into the riverbank in a plum blossom pattern, and stones are placed in layers along the inner side of the precast piles. Plants are planted in the gaps between the stones and on the surface of the bank slope. “Gabion + Vegetation Slope Protection”: Precast gabions and pile foundations, with the pile foundations driven into the riverbank through the bottom of the gabions; the gabions are filled with stones and the top is covered with planted soil and vegetation. S4. Regularly monitor bank slope settlement, water scour depth, and vegetation survival rate, and promptly replenish filler material and replant vegetation.

[0006] By adopting the above technical solutions, S1 adapts the "gabion + vegetation slope protection" to the flood control and erosion prevention needs of mountain torrent-affected areas and flood channels, while "natural stone placement + vegetation slope protection" matches the ecological landscape needs of landscape demand areas and soil stability areas; S2 strengthens the construction foundation by clearing the bank slope and compacting the original soil, and reinforcing the local silt layer, effectively avoiding the risk of later foundation settlement; In S3, "natural stone placement + vegetation slope protection" uses quincunx-shaped precast pile foundations for positioning and layered stone placement to construct a protective framework, while "gabion + vegetation slope protection" forms a stable structure by fixing precast gabions with through-cage pile foundations. Both are combined with plant planting to achieve synergy between structural protection and ecological restoration; S4 continuously ensures bank slope stability, erosion resistance and ecological benefits by regularly monitoring bank slope settlement, water erosion depth and vegetation survival rate and making timely repairs, ultimately achieving a comprehensive technical effect of riverbank safety protection, ecological improvement and long-term stability.

[0007] Furthermore, the pile foundation includes a pile body, a sleeve, a top plate, and a top cover; the lower end of the pile body is conical, and an annular groove, a feeding hole, and a receiving hole are provided on the pile body; the annular groove is located on the side wall of the pile body, the upper end of the feeding hole is connected to the upper end of the pile body, the lower end of the feeding hole is connected to the top of the receiving hole, and the receiving hole is connected to the annular groove; the sleeve is fitted outside the pile body and fits with the annular groove, the top plate is fixed to the upper end of the pile body, and a feeding hole is provided at the position corresponding to the feeding hole on the top plate; the top cover is set on the top of the sleeve, and its inner side is snapped into fit with the top plate; a discharge hole is provided at the position corresponding to the receiving hole on the sleeve, and an operating component for controlling the rotation of the sleeve is provided inside the pile body; an elastic component for receiving plant seeds falling from the feeding hole and dispersing the soil around the discharge hole is provided inside the receiving hole.

[0008] By adopting the above technical solution, workers can drive piles into the ground along the riverbank using a pile driving device. Before driving the piles, workers need to rotate the sleeve using the operating component to misalign the discharge hole and the receiving hole, thus preventing the receiving hole from being blocked by soil during the pile driving process. After the pile is driven to the specified depth, workers only need to open the top cover to add the desired plant seeds (such as seeds of emergent aquatic plants like reeds and cattails) to the lower feed hole through the feed hole. The seeds are ultimately received by the elastic component. Then, workers only need to rotate the sleeve using the operating component to align the discharge hole and the receiving hole. At this time, the elastic component can break up the soil around the discharge hole and send the plant seeds into the soil, completing the operation of planting plants at the specified depth in the soil and ensuring the root depth of the plants. This helps to ensure the stability of the pile foundation during use and enhances the slope stabilization effect.

[0009] Furthermore, the elastic component includes a spring, a movable plate, a connecting rod, a top block, and a non-woven bag; one end of the spring is fixed to the inner wall of the receiving hole near the pile axis, the movable plate slides against the inner wall of the receiving hole, and the end of the spring away from the pile axis abuts against the movable plate; one end of the connecting rod is fixed to the movable plate away from the spring, and two connecting rods are provided and symmetrically arranged; the top block is fixed to the ends of the two connecting rods away from the pile axis, and the side of the top block away from the pile axis is provided with an annular blade, which abuts against the inner wall of the sleeve when the discharge hole and the receiving hole are misaligned; the non-woven bag is fixed between the two connecting rods, and the distance between its two edges is greater than the diameter of the discharge hole.

[0010] By adopting the above technical solution, the non-woven bag with the top opening can receive plant seeds falling into the receiving hole from the discharge hole. When the operator rotates the sleeve through the operating component until the discharge hole is aligned with the receiving hole, the movable plate, connecting rod, top block and non-woven bag are quickly moved out of the receiving hole under the elastic force of the spring. The annular blade of the top block smoothly breaks open the soil around the discharge hole, thereby allowing the non-woven bag and the plant seeds inside it to be moved out of the receiving hole, which facilitates the rooting and germination of plant seeds around the pile foundation and enhances the soil stabilization performance of the riverbank.

[0011] Furthermore, the section of the connecting rod near the pile axis is truncated cone-shaped, and the diameter of the end of the connecting rod near the pile axis is larger than the diameter of the end of the connecting rod near the top block.

[0012] By adopting the above technical solution, after the top block pops out under the elastic force of the spring, in order to ensure that the movable plate and non-woven bag and other parts are completely removed into the soil, the workers can continue to rotate the sleeve so that the inner wall of the discharge hole abuts against the side wall of the connecting rod that has not been completely removed. Due to the setting of the diameter of the connecting rod, the connecting rod, movable plate and non-woven bag can be gradually removed from the receiving hole and discharge hole as the sleeve continues to rotate, which is conducive to the smooth growth of plant seeds around the pile foundation.

[0013] Furthermore, the end of the movable plate away from the top block abuts against a retraction auxiliary block. The retraction auxiliary block is a frustum-shaped block structure. The side of the retraction auxiliary block away from the movable plate is fixed to the end of the spring away from the pile axis, and the diameter of the side of the retraction auxiliary block near the pile axis is larger than the diameter of the side away from the pile axis.

[0014] By adopting the above technical solution, when the movable plate is partially removed from the sleeve under the spring force, as the sleeve continues to rotate, the inner wall of the discharge hole abuts against the arc surface of the retraction auxiliary block and gradually causes the retraction auxiliary block to be retracted into the receiving hole. After the discharge hole and the receiving hole are misaligned, the sleeve blocks the opening of the receiving hole, reducing the probability of the spring being corroded by the moisture in the soil, and thus reducing the probability of damaging the plant root growth environment.

[0015] Furthermore, there are multiple discharge holes evenly distributed about the axis of the pile body, and the lower ends of two adjacent discharge holes are located at different heights of the pile body; the number of feed holes, receiving holes, and discharge holes are equal to the number of discharge holes, and their positions correspond one-to-one.

[0016] By adopting the above technical solution, workers can plant different types of plant seeds into the soil at different depths through different feeding holes, which is conducive to the growth of different types of plant seeds around the pile foundation and fully play the role of preventing soil erosion.

[0017] Furthermore, the bottom of the top plate is provided with a groove communicating with multiple feed holes, and the top of the top plate is provided with an air inlet communicating with the groove; the top plate is provided with an auxiliary feeding assembly, which includes an air inlet pipe, an annular sealing ring, an annular plate, an annular rack, a sealing plate, a rotating shaft, a drive gear, and a handwheel; the air inlet pipe is fixed to the top of the top plate and surrounds the air inlet, and the annular sealing ring is fixed to the top of the top plate and surrounds the feed holes, the number of annular sealing rings is equal to the number of feed holes and their positions correspond one-to-one; The annular plate is rotatably mounted on the top of the top plate, and the sealing plate is fixed to the outer wall of the annular plate. The junction between the side wall and the bottom of the sealing plate is chamfered. The distance between the bottom surface of the sealing plate and the top of the top plate is less than the thickness of the annular sealing ring. The number of sealing plates is equal to the number of annular sealing rings, and the sealing plates and annular sealing rings are spaced apart. The annular rack is fixed to the inner side of the annular plate. The rotating shaft is rotatably mounted on the top of the top plate. The drive gear is fixedly sleeved on the rotating shaft and meshes with the annular rack. The handwheel is fixed to the upper end of the rotating shaft.

[0018] By adopting the above technical solution, to prevent the probability of plant seeds getting stuck in the feeding hole, the operator only needs to rotate the rotating shaft by handwheel. This causes the drive gear fixed to the rotating shaft, the ring rack meshing with the drive gear, the ring plate fixed to the ring rack, and the sealing plate fixed to the ring plate to all rotate. This allows multiple sealing plates to seal the top of their respective ring seals (the distance between the bottom surface of the sealing plate and the top surface of the top plate is less than the thickness of the ring seal, ensuring that the bottom of the sealing plate is tightly against the top of the ring seal). At this time, the operator only needs to connect the air inlet pipe to an external air source through a hose and start the air source switch to inflate the groove. After the airflow enters the feeding hole, it can blow air into the seeds in the feeding hole to prevent the seeds from getting stuck and affecting their normal germination later.

[0019] Furthermore, an O-ring is fixed at the upper end of the pile near its edge, and an annular connecting groove is provided at the bottom of the top plate to engage with the O-ring.

[0020] By adopting the above technical solution, the O-ring and the annular connecting groove are matched to ensure the sealing of the connection between the upper end of the pile body and the top plate, which is conducive to the smooth entry of the air source into the discharge hole and the unblocking.

[0021] Furthermore, a reinforcing rib is fixed at the intersection between the inner wall of the top cover and its top, and multiple reinforcing ribs are provided and evenly distributed about the axis of the top cover; a through hole is provided through the top cover.

[0022] By adopting the above technical solution, the reinforcing ribs ensure the structural strength of the top cover, which is conducive to the smooth progress of piling work. The through holes facilitate the disassembly of the top cover by workers after piling is completed.

[0023] Furthermore, the operating components include a central rod and a connecting plate. A central hole that mates with the central rod is provided through the center of the pile body. The upper end of the central rod is adjacent to the upper end of the pile body and has an internal hexagonal groove. The connecting plate is fixed to the lower end of the central rod. A fan-shaped groove for the connecting plate to move is provided inside the pile body. There are two fan-shaped grooves that are symmetrically arranged. The two ends of the connecting plate are fixed to the inner walls of the two sides of the sleeve, respectively.

[0024] By adopting the above technical solution, the operator can rotate the center rod with an Allen wrench that mates with the Allen socket, thereby causing the connecting plate and the sleeve to rotate, thus adjusting the position of the discharge hole relative to the receiving hole.

[0025] In summary, the present invention has the following beneficial effects: 1. In this application, S1 adapts the "gabion + vegetation slope protection" to the flood control and erosion prevention needs of mountain torrent-affected areas and flood channels, while "natural stone placement + vegetation slope protection" matches the ecological landscape needs of landscape demand areas and soil stability areas; S2 strengthens the construction foundation by clearing the bank slope and compacting the original soil, and reinforcing the local silt layer, effectively avoiding the risk of later foundation settlement; S3 uses quincunx-shaped precast pile foundations for positioning and layered stone placement to construct a protective framework, while "gabion + vegetation slope protection" forms a stable structure by fixing precast gabions with through-cage pile foundations. Both are combined with plant planting to achieve synergy between structural protection and ecological restoration; S4 continuously ensures the stability, erosion resistance and ecological benefits of the bank slope by regularly monitoring bank slope settlement, water erosion depth and vegetation survival rate and making timely repairs, ultimately achieving a comprehensive technical effect of riverbank safety protection, ecological improvement and long-term stability. 2. In this application, the non-woven bag with an open top can receive plant seeds falling into the receiving hole from the discharge hole. When the operator rotates the sleeve through the operating component until the discharge hole is aligned with the receiving hole, the movable plate, connecting rod, top block and non-woven bag are quickly moved out of the receiving hole under the elastic force of the spring. The annular blade of the top block smoothly breaks open the soil around the discharge hole, thereby allowing the non-woven bag and the plant seeds inside it to be moved out of the receiving hole, which facilitates the rooting and germination of plant seeds around the pile foundation and enhances the soil stabilization performance of the riverbank. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the pile foundation in an embodiment of the present invention; Figure 3 This is a structural schematic diagram of an embodiment of the present invention used to highlight the operating components; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 yes Figure 3 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram illustrating the internal structure of the pile body in an embodiment of the present invention; Figure 7 This is a schematic diagram illustrating the structure of the auxiliary feeding component in an embodiment of the present invention; Figure 8 This is a structural schematic diagram of an embodiment of the present invention used to highlight the elastic component; Figure 9 This is a structural schematic diagram of an embodiment of the present invention used to highlight the pile body.

[0027] In the picture: 1. Pile body; 11. Annular groove; 12. Discharge hole; 13. Receiving hole; 14. O-ring; 15. Center hole; 16. Fan-shaped groove; 2. Sleeve; 21. Discharge hole; 3. Top plate; 31. Feed hole; 32. Groove; 33. Air inlet; 34. Annular connecting groove; 4. Top cover; 41. Reinforcing rib; 42. Through hole; 5. Operating components; 51. Center rod; 511. Socket hexagonal groove; 52. Connecting plate; 6. Elastic component; 61. Spring; 62. Movable plate; 63. Connecting rod; 64. Top block; 641. Annular blade; 65. Non-woven bag; 7. Retraction auxiliary block; 8. Auxiliary feeding assembly; 81. Air inlet pipe; 82. Annular sealing ring; 83. Annular plate; 84. Annular rack; 85. Sealing plate; 86. Rotating shaft; 87. Drive gear; 88. Handwheel. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figure 1-9 As shown in the figure, this application discloses a method for riverbank restoration, including the following steps: S1. Investigate the target river (such as Zaoxi, Kuiliu River, Shengtaoxi, and Dongxi) for its bank slope type (natural soil revetment / exposed revetment), soil type (silt / gravel containing cohesive soil / plain fill), water flow velocity (e.g., Zaoxi's flow velocity is 1.27 m / s, Shengtaoxi's flow velocity is 0.9 m / s), and surrounding environment (agricultural land, flood control channels). (If there are biomass power generation projects, geothermal power generation and heat utilization projects, or other new energy facilities nearby, their distance from the river and potential impacts must be investigated simultaneously to ensure that the restoration plan is compatible with the construction of new energy projects.) Based on the results, the following methods were selected for different river sections: gabions + vegetation slope protection were used in the flash flood impact area (Shengtao Creek) and flood diversion channel (Kuiliu River); natural stone placement + vegetation slope protection was used in the landscape demand area (Dongxi Creek) and soil stability area. The repair length for each river section was specified (e.g., 9800m for gabion slope protection in Kuiliu River, 400m for stone slope protection in Dongxi Creek) and material specifications (precast pile foundation diameter 12-16cm, gabions are 6mm galvanized steel wire mesh boxes (50×50mm grid), stones 80-120mm). In this embodiment, the precast pile foundation can be a concrete pile. S2. Remove weeds, humus and construction waste from the bank slope, compact the original soil of the bank slope (compaction degree ≥90%), and reinforce the local silt layer (e.g., using "20cm thick C20 plain concrete cushion layer + 30cm thick C30 reinforced concrete base slab" for reinforcement). S3, "Natural Stone Placement + Vegetation Slope Protection": Precast piles (4-6m in length) are driven into the riverbank in a quincunx pattern. Stones (landscape rocks weighing more than 50kg each) are placed in layers along the inner side of the precast piles (each layer is 0.5m high), forming a composite structure of "pile anti-sliding + stone pressure distribution". Plants (such as reeds, cattails and other emergent plants) are planted in the gaps between the stones and on the surface of the bank slope. Shrubs can be planted on the side away from the river. The roots of the vegetation, the piles, and the stones form a three-dimensional slope stabilization, improving the bank slope's resistance to splash erosion. "Gabion + Vegetation Slope Protection": Precast gabions (6mm galvanized low carbon steel wire precast into standard 2m×1m×1m wire mesh boxes) and pile foundations, with the pile foundations driven into the riverbank through the bottom of the gabions; the gabions are filled with stones (80-120mm particle size accounting for ≥80%), and the top is covered with planting soil (5-6cm thick) and planted with vegetation (such as lawn). S4. Regularly monitor bank slope settlement, water scour depth (≤0.93m in the main channel of Zaoxi River, with effective protection from precast pile foundations) and vegetation survival rate (≥85%), and promptly replenish filler and replant vegetation.

[0030] S1 adapts the "gabion + vegetation slope protection" to the flood control and erosion prevention needs of mountain torrent-affected areas and flood channels, while "natural stone placement + vegetation slope protection" matches the ecological landscape needs of landscape demand areas and soil stability areas. S2 strengthens the construction foundation by clearing the bank slope and compacting the original soil, and reinforcing the local silt layer, effectively avoiding the risk of later foundation settlement. In S3, "natural stone placement + vegetation slope protection" uses quincunx-shaped precast pile foundations for positioning and layered stone placement to construct a protective framework, while "gabion + vegetation slope protection" forms a stable structure by fixing precast gabions with through-cage pile foundations. Both are combined with plant planting to achieve synergy between structural protection and ecological restoration. S4 continuously ensures bank slope stability, erosion resistance and ecological benefits by regularly monitoring bank slope settlement, water erosion depth and vegetation survival rate and making timely repairs, ultimately achieving a comprehensive technical effect of riverbank safety protection, ecological improvement and long-term stability.

[0031] The pile foundation (precast pile foundation) includes a pile body 1, a sleeve 2, a top plate 3, and a top cover 4 (the lower part of the pile body 1 is made of concrete, while the upper part of the pile body 1, the sleeve 2, the top plate 3, the top cover 4, and other components described below can be made of metal, with stainless steel being the preferred choice. The specific choice can be made reasonably based on usage requirements, environmental protection requirements, and cost budget). The lower end of the pile body 1 is conical, and it is provided with an annular groove 11, a discharge hole 12, and a receiving hole 13. The annular groove 11 is located on the side wall of the pile body 1, the upper end of the discharge hole 12 is connected to the upper end of the pile body 1, and the lower end of the discharge hole 12 is connected to the top of the receiving hole 13. The casing 2 is sleeved on the outside of the pile body 1 and fits with the annular groove 11. The top plate 3 is fixed to the upper end of the pile body 1. The top plate 3 is provided with a feed hole 31 at the position corresponding to the feed hole 12. The top cover 4 is set on the top of the casing 2, and its inner side is snapped into the top plate 3. The casing 2 is provided with a discharge hole 21 at the position corresponding to the feed hole 13. An operating component 5 for controlling the rotation of the casing 2 is provided inside the pile body 1. An elastic component 6 for receiving plant seeds falling from the feed hole 12 and breaking open the soil around the discharge hole 21 is provided inside the feed hole 13. When selecting the spring 61, the required thrust (calculating the soil flushing resistance, this part is a mature existing technology and does not need to be elaborated) should be determined according to the hardness of the target river soil to match the stiffness. The shape parameters should be limited according to the size of the feed hole 13. The corrosion-resistant material should be selected in combination with the environmental humidity and corrosivity. The elastic potential energy can be verified to meet the requirements of breaking the soil and delivering seeds through pre-compression test.

[0032] Workers can use a pile-driving device to drive piles into the ground along the riverbank. Before driving, workers need to rotate the sleeve 2 using the operating component 5 to misalign the discharge hole 21 with the receiving hole 13, thus preventing the receiving hole 13 from being blocked by soil during the pile-driving process. After the pile is driven to the designated depth, workers only need to open the top cover 4 to add the desired plant seeds (such as seeds of emergent aquatic plants like reeds and cattails) to the lower feeding hole 12 through the feeding hole 31. The seeds are ultimately received by the elastic component 6. Then, workers only need to rotate the sleeve 2 using the operating component 5 to discharge the seeds. Hole 21 is aligned with receiving hole 13 (to facilitate workers in judging whether discharge hole 21 and receiving hole 13 are aligned, corresponding indicator areas can be set at the upper end of pile body 1 and sleeve 2 to indicate the position of discharge hole 21 and receiving hole 13 respectively. When the indicator areas of the two match, it means that discharge hole 21 and receiving hole 13 have completed the alignment action). At this time, elastic component 6 can break open the soil around discharge hole 21 and send plant seeds into the soil, completing the operation of planting plants at a specified depth in the soil and ensuring the rooting depth of the plants. This is conducive to ensuring the stability of the pile foundation during use and strengthening the slope stabilization effect.

[0033] The elastic component 6 includes a spring 61, a movable plate 62, a connecting rod 63, a top block 64, and a non-woven bag 65. One end of the spring 61 is fixed to the inner wall of the receiving hole 13 near the axis of the pile body 1. The movable plate 62 is slidably fitted with the inner wall of the receiving hole 13. The end of the spring 61 away from the axis of the pile body 1 abuts against the movable plate 62. One end of the connecting rod 63 is fixed to the side of the movable plate 62 away from the spring 61. There are two connecting rods 63 arranged symmetrically. The top block 64 is fixed to the ends of the two connecting rods 63 away from the axis of the pile body 1. The side of the top block 64 away from the axis of the pile body 1 is provided with an annular blade 641. When the discharge hole 21 is misaligned with the receiving hole 13, the annular blade 641 abuts against the inner wall of the sleeve 2. The non-woven bag 65 is fixed between the two connecting rods 63. The distance between its two edges is greater than the diameter of the discharge hole 12.

[0034] The non-woven bag 65 with an open top can receive plant seeds falling from the discharge hole 12 into the receiving hole 13. When the operator rotates the sleeve 2 through the operating component 5 until the discharge hole 21 is aligned with the receiving hole 13, the movable plate 62, connecting rod 63, top block 64 and non-woven bag 65 are quickly moved out of the receiving hole 13 under the elastic force of the spring 61. The annular blade 641 of the top block 64 smoothly breaks open the soil around the discharge hole 21, thereby allowing the non-woven bag 65 and the plant seeds inside it to be moved out of the receiving hole 13, which facilitates the rooting and germination of plant seeds around the pile foundation and enhances the soil stabilization performance of the riverbank.

[0035] The section of the connecting rod 63 near the axis of the pile body 1 is truncated cone-shaped, and the diameter of the end of the connecting rod 63 near the axis of the pile body 1 is larger than the diameter of the end of the connecting rod 63 near the top block 64.

[0036] After the top block 64 pops out under the elastic force of the spring 61, in order to ensure that the movable plate 62 and non-woven bag 65 and other parts are completely removed into the soil, the workers can continue to rotate the sleeve 2 so that the inner wall of the discharge hole 21 abuts against the side wall of the connecting rod 63 that has not been completely removed. Due to the setting of the diameter of the connecting rod 63, the connecting rod 63, the movable plate 62 and the non-woven bag 65 can be gradually removed from the receiving hole 13 and the discharge hole 21 as the sleeve 2 continues to rotate, which is conducive to the smooth growth of plant seeds around the pile foundation.

[0037] The end of the movable plate 62 away from the top block 64 is abutted against a retraction auxiliary block 7. The retraction auxiliary block 7 is a frustum-shaped block structure. The side of the retraction auxiliary block 7 away from the movable plate 62 is fixed to the end of the spring 61 away from the axis of the pile body 1. The diameter of the side of the retraction auxiliary block 7 close to the axis of the pile body 1 is larger than the diameter of the side away from the axis of the pile body 1.

[0038] When the movable plate 62 is partially moved out of the sleeve 2 under the elastic force of the spring 61, as the sleeve 2 continues to rotate, the inner wall of the discharge hole 21 abuts against the arc surface of the retraction auxiliary block 7 and gradually causes the retraction auxiliary block 7 to be retracted into the receiving hole 13. After the discharge hole 21 and the receiving hole 13 are misaligned, the sleeve 2 blocks the opening of the receiving hole 13, reducing the probability of the spring 61 being corroded by the moisture in the soil, and thus reducing the probability of damaging the plant root growth environment.

[0039] Multiple discharge holes 12 are provided and evenly distributed about the axis of the pile body 1. The lower ends of two adjacent discharge holes 12 are located at different heights on the pile body 1. The number of feed holes 31, receiving holes 13, and discharge holes 21 are equal to the number of discharge holes 12, and their positions correspond one-to-one. This allows workers to plant different types of plant seeds in the soil at different depths through different discharge holes 12, which is beneficial for the growth of different types of plant seeds around the pile foundation and fully plays a role in conserving soil and water.

[0040] The top plate 3 has a groove 32 at its bottom that communicates with multiple feed holes 31, and an air inlet 33 at its top that communicates with the groove 32. An auxiliary feeding assembly 8 is provided on the top plate 3. The auxiliary feeding assembly 8 includes an air inlet pipe 81, an annular sealing ring 82, an annular plate 83, an annular rack 84, a sealing plate 85, a rotating shaft 86, a drive gear 87, and a handwheel 88. The air inlet pipe 81 is fixed to the top of the top plate 3 and surrounds the air inlet 33. The annular sealing ring 82 is fixed to the top of the top plate 3 and surrounds the feed holes 31. The number of annular sealing rings 82 is equal to the number of feed holes 31, and their positions correspond one-to-one. The plate 83 is rotatably mounted on the top of the top plate 3. The sealing plate 85 is fixed to the outer wall of the annular plate 83. The junction between the side wall and the bottom of the sealing plate 85 is chamfered. The distance between the bottom surface of the sealing plate 85 and the top of the top plate 3 is less than the thickness of the annular sealing ring 82. The number of sealing plates 85 is equal to the number of annular sealing rings 82, and the sealing plates 85 and annular sealing rings 82 are spaced apart. The annular rack 84 is fixed to the inner side of the annular plate 83. The rotating shaft 86 is rotatably mounted on the top of the top plate 3. The drive gear 87 is fixedly sleeved on the rotating shaft 86 and meshes with the annular rack 84. The handwheel 88 is fixed to the upper end of the rotating shaft 86.

[0041] To prevent plant seeds from getting stuck in the feeding hole 12, the operator only needs to rotate the rotating shaft 86 using the handwheel 88. This causes the drive gear 87 fixed to the rotating shaft 86, the annular rack 84 meshing with the drive gear 87, the annular plate 83 fixed to the annular rack 84, and the sealing plate 85 fixed to the annular plate 83 to all rotate. This allows multiple sealing plates 85 to seal the top of their respective annular sealing rings 82 (the distance between the bottom surface of the sealing plate 85 and the top of the top plate 3 is less than the thickness of the annular sealing ring 82, ensuring that the bottom of the sealing plate 85 is tightly against the top of the annular sealing ring 82). At this time, the operator only needs to connect the air inlet pipe 81 to an external air source through a flexible hose and turn on the air source switch to inflate the groove 32 with air. After the airflow enters the feeding hole 12, it can blow air into the seeds in the feeding hole 12 to prevent the seeds from getting stuck and affecting their normal germination later.

[0042] An O-ring 14 is fixed at the upper end of the pile body 1 near its edge, and an annular connecting groove 34 is provided at the bottom of the top plate 3 to engage with the O-ring 14. The engagement of the O-ring 14 and the annular connecting groove 34 ensures the sealing of the connection between the upper end of the pile body 1 and the top plate 3, which is conducive to the smooth entry of the air source into the discharge hole 12 and its unblocking.

[0043] A reinforcing rib 41 is fixed at the intersection of the inner wall and the top of the top cover 4. Multiple reinforcing ribs 41 are provided and evenly distributed about the axis of the top cover 4. A through hole 42 is provided through the top cover 4. The reinforcing ribs 41 ensure the structural strength of the top cover 4 and facilitate the smooth progress of piling work. The through hole 42 allows workers to disassemble the top cover 4 after piling is completed.

[0044] The operating component 5 includes a central rod 51 and a connecting plate 52. A central hole 15 that mates with the central rod 51 is provided through the center of the pile body 1. The upper end of the central rod 51 is adjacent to the upper end of the pile body 1, and an internal hexagonal groove 511 is provided at the upper end of the central rod 51. The connecting plate 52 is fixed to the lower end of the central rod 51. A fan-shaped groove 16 for the connecting plate 52 to move is provided inside the pile body 1 (in this embodiment, the lower part of the pile body 1 mentioned above specifically refers to the part below the annular groove 11. The material discharge hole 12, the receiving hole 13, the central hole 15 and the fan-shaped groove 16 can all be made in the precast concrete process with the corresponding mold, or can be processed later according to the corresponding size requirements). There are two fan-shaped grooves 16 and they are symmetrically arranged. The two ends of the connecting plate 52 are respectively fixed to the inner walls of both sides of the sleeve 2.

[0045] The operator can rotate the center rod 51 using an Allen wrench that engages with the Allen socket 511 (to reduce the difficulty of rotating the sleeve 2, the operator can also use an electric wrench to rotate the center rod 51), thereby causing the connecting plate 52 and the sleeve 2 to rotate, thus adjusting the position of the discharge hole 21 relative to the receiving hole 13.

[0046] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for riverbank restoration, characterized in that, Includes the following steps: S1. Investigate the target riverbank slope type, soil quality, water flow velocity and surrounding environment, and select the appropriate type based on the results: use "gabion + vegetation slope protection" in areas affected by flash floods and flood channels; use "natural stone placement + vegetation slope protection" in areas with landscape requirements and stable soil quality, and clarify the repair length and material specifications for each river section. S2. Remove weeds, humus and construction waste from the bank slope, compact the original soil on the bank slope, and reinforce the local silt layer. S3, "Natural Stone Placement + Vegetation Slope Protection": Precast piles are driven into the riverbank in a plum blossom pattern, and stones are placed in layers along the inner side of the precast piles. Plants are planted in the gaps between the stones and on the surface of the bank slope. "Gabion + Vegetated Slope Protection": Precast gabions and pile foundations, with the pile foundations driven into the riverbank through the bottom of the gabions; the gabions are filled with stones and the tops are covered with planted soil and vegetation. S4. Regularly monitor bank slope settlement, water scour depth, and vegetation survival rate, and promptly replenish filler material and replant vegetation.

2. The method for riverbank restoration according to claim 1, characterized in that: The pile foundation includes the pile body (1), the casing (2), the top plate (3), and the top cover (4); The pile body (1) is provided with an annular groove (11), a feeding hole (12) and a receiving hole (13); the annular groove (11) is located on the side wall of the pile body (1), the upper end of the feeding hole (12) is connected to the upper end of the pile body (1), the lower end of the feeding hole (12) is connected to the top of the receiving hole (13), and the receiving hole (13) is connected to the annular groove (11); The sleeve (2) is fitted outside the pile body (1) and fits with the annular groove (11). The top plate (3) is fixed to the upper end of the pile body (1). The top plate (3) is provided with a feed hole (31) at the position corresponding to the feed hole (12). The top cover (4) is set on the top of the sleeve (2), and its inner side is snapped into the top plate (3). The sleeve (2) is provided with a discharge hole (21) at the position corresponding to the receiving hole (13). The pile body (1) is provided with an operating component (5) for controlling the rotation of the sleeve (2). The receiving hole (13) is provided with an elastic component (6) for receiving plant seeds falling from the feed hole (12) and for breaking open the soil around the discharge hole (21).

3. The method for riverbank restoration according to claim 2, characterized in that: The elastic component (6) includes a spring (61), a movable plate (62), a connecting rod (63), a top block (64), and a non-woven bag (65); one end of the spring (61) is fixed to the inner wall of the receiving hole (13) near the axis of the pile body (1), the movable plate (62) slides with the inner wall of the receiving hole (13), and the end of the spring (61) away from the axis of the pile body (1) abuts against the movable plate (62); one end of the connecting rod (63) is fixed to the side of the movable plate (62) away from the spring (61). Two connecting rods (63) are provided and symmetrically arranged; the top block (64) and the two connecting rods (63) are fixed at the ends away from the axis of the pile body (1), and the top block (64) is provided with an annular blade (641) on the side away from the axis of the pile body (1). When the discharge hole (21) and the receiving hole (13) are misaligned, the annular blade (641) abuts against the inner wall of the sleeve (2); the non-woven bag (65) is fixed between the two connecting rods (63), and the distance between its two sides is greater than the diameter of the discharge hole (12).

4. The method for riverbank restoration according to claim 3, characterized in that: The section of the connecting rod (63) near the axis of the pile body (1) is truncated cone-shaped, and the diameter of the end of the connecting rod (63) near the axis of the pile body (1) is greater than the diameter of the end of the connecting rod (63) near the top block (64).

5. A method for riverbank restoration according to claim 3, characterized in that: The end of the movable plate (62) away from the top block (64) is abutted against a retraction auxiliary block (7). The retraction auxiliary block (7) is a frustum-shaped block structure. The side of the retraction auxiliary block (7) away from the movable plate (62) is fixed to the end of the spring (61) away from the axis of the pile body (1). The diameter of the side of the retraction auxiliary block (7) close to the axis of the pile body (1) is larger than the diameter of the side away from the axis of the pile body (1).

6. A method for riverbank restoration according to claim 3, characterized in that: Multiple discharge holes (12) are provided and are evenly distributed about the axis of the pile body (1). The lower ends of two adjacent discharge holes (12) are located at different heights of the pile body (1). The number of feed holes (31), receiving holes (13), and discharge holes (21) are equal to the number of discharge holes (12), and their positions correspond one-to-one.

7. A method for riverbank restoration according to claim 6, characterized in that: The bottom of the top plate (3) is provided with a groove (32) that communicates with multiple feed holes (31), and the top of the plate is provided with an air inlet (33) that communicates with the groove (32); the top plate (3) is provided with an auxiliary feeding assembly (8), which includes an air inlet pipe (81), an annular sealing ring (82), an annular plate (83), an annular rack (84), a sealing plate (85), a rotating shaft (86), a drive gear (87), and a handwheel (88); An air inlet pipe (81) is fixed to the top of the top plate (3) and surrounds the air inlet (33). An annular sealing ring (82) is fixed to the top of the top plate (3) and surrounds the feed hole (31). The number of annular sealing rings (82) is equal to the number of feed holes (31) and their positions correspond one-to-one. An annular plate (83) is rotatably mounted on the top of the top plate (3). A sealing plate (85) is fixed to the outer wall of the annular plate (83). A chamfer is provided at the junction between the side wall of the sealing plate (85) and its bottom. The bottom surface of the sealing plate (85) is flush with the bottom surface of the sealing plate (85). The distance between the tops of the top plates (3) is less than the thickness of the annular sealing ring (82). The number of sealing plates (85) is equal to the number of annular sealing rings (82), and the sealing plates (85) and annular sealing rings (82) are spaced apart. The annular rack (84) is fixed to the inner side of the annular plate (83). The rotating shaft (86) is rotatably installed on the top of the top plate (3). The drive gear (87) is fixedly sleeved on the rotating shaft (86) and meshes with the annular rack (84). The handwheel (88) is fixed to the upper end of the rotating shaft (86).

8. A method for riverbank restoration according to claim 7, characterized in that: An O-ring (14) is fixed at the upper end of the pile body (1) near its edge, and an annular connecting groove (34) is provided at the bottom of the top plate (3) to engage with the O-ring (14).

9. A method for riverbank restoration according to claim 7, characterized in that: A reinforcing rib (41) is fixed at the intersection between the inner wall of the top cover (4) and its top. Multiple reinforcing ribs (41) are provided and are evenly distributed about the axis of the top cover (4). A through hole (42) is provided on the top cover (4).

10. A method for riverbank restoration according to claim 7, characterized in that: The operating component (5) includes a central rod (51) and a connecting plate (52). A central hole (15) that mates with the central rod (51) is provided through the center of the pile body (1). The upper end of the central rod (51) is adjacent to the upper end of the pile body (1), and an internal hexagonal groove (511) is provided at the upper end of the central rod (51). The connecting plate (52) is fixed to the lower end of the central rod (51). A fan-shaped groove (16) for the connecting plate (52) to move is provided inside the pile body (1). There are two fan-shaped grooves (16) and they are arranged symmetrically. The two ends of the connecting plate (52) are fixed to the inner walls of the sleeve (2) on both sides respectively.

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