Steel pipe pile anchor bar piling device for side slope landslide treatment and reinforcement
By combining the sealing and detachment components, the problems of incomplete sealing of the grouting port and uneven grout diffusion were solved, achieving uniform grout penetration and improving reinforcement quality, thereby enhancing slope stability and construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHENGDU UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2026-03-18
- Publication Date
- 2026-05-12
AI Technical Summary
Existing technologies have poor sealing effects at the grouting ports, and uneven diffusion of the grout during high-pressure injection leads to a decline in reinforcement quality and low construction efficiency.
By using a combination of sealing and releasing components, the grouting port is sealed by the rising and falling of the sealing component, and a space is reserved on the outside of the grouting port. The releasing component is used to inflate the rubber sheet to expand it, guide the grout to spread evenly, and avoid local insufficient grouting or loss.
It improves the overall stability and construction efficiency of slope reinforcement, ensures unobstructed grouting channels, prevents soil and gravel intrusion, achieves uniform grout penetration, and enhances reinforcement quality and construction continuity.
Smart Images
Figure CN122013760A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of slope treatment technology, and in particular to a steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement. Background Technology
[0002] In slope landslide control projects, steel pipe pile anchoring technology is one of the mainstream reinforcement methods. Its core logic is to construct a composite load-bearing system of "steel pipe pile-anchor bar-solidified grout" at a predetermined location on the slope to resist the sliding force of soil or rock. Existing technology usually uses an anchoring drilling rig with a casing rotary head to complete the drilling operation. After drilling to a deep stable stratum, hollow steel pipe piles are lowered. Some processes will install simple sealing components inside the steel pipe to temporarily block the grouting port. Then, anchor bars are lowered and grout is injected into the steel pipe through a packer. The grout penetrates into the surrounding stratum and solidifies with the steel pipe and anchor bars, transferring the surface load of the slope to the deep stable structure, thus achieving reinforcement and protection. It is widely used in highways, railways, and mine slopes.
[0003] Chinese Patent Publication No. CN222375412U discloses a steel pipe pile anchor bar piling device for slope landslide control and reinforcement. The device includes a slope body and steel pipe piles installed at the top of the slope body for reinforcement. Each steel pipe pile includes a first steel pipe inserted into the inner wall of the slope body. The inner wall of the first steel pipe has grouting holes, and positioning bars are fixedly connected to its inner wall. Three bundled reinforcing bars are fixedly connected to one side of each positioning bar, with welds between the bars. The inner wall of the first steel pipe has a filling layer for easy grouting. This solution addresses the need for effective surface reinforcement measures to control horizontal displacement of the mountain during tunnel portal excavation and reduce the impact of terrain bias on the structure of the arch tunnel and slope stability. Considering the stability of steep slopes, anti-slide piles are the most effective solution. However, this solution has an excessively long construction period, which cannot meet the project schedule requirements.
[0004] However, the existing technology has poor sealing effect on the grouting port, and the diffusion of grout during high-pressure injection lacks guidance, which can easily lead to local oversaturation or uneven diffusion, thus reducing the quality of reinforcement. Summary of the Invention
[0005] The main objective of this invention is to provide a steel pipe pile anchor bar driving device for slope landslide control and reinforcement, which can effectively solve the problems in the background art.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement includes an external lifting assembly. A mounting base is installed on one side of the external lifting assembly. A motor is fixedly connected to the side of the mounting base away from the external lifting assembly. A casing rotary device is fixedly installed at the output end of the motor. The casing rotary device includes an outer chuck and an inner chuck. A rotary drilling assembly is installed at the lower end of the casing rotary device. Six sealing components are provided at the lower end of the casing rotary device to block the grouting port on the surface of the steel pipe. Each of the six sealing components includes a sliding rod and a rubber sheet. A disengagement component is provided on the upper side of each sealing component to inflate the rubber sheet and cause it to detach from the sliding rod.
[0007] Preferably, the rotary drilling assembly includes a rotating seat and a square block. The rotating seat is initially connected to the inner chuck of the casing rotator. A limit block is fixedly connected to the inner surface of the rotating seat. A T-shaped locking block is slidably connected to the inner surface of the rotating seat. A rotating shaft is fixedly connected to the lower end of the T-shaped locking block. A rotating groove is formed on the inner surface of the rotating shaft. A connecting seat is slidably connected to the inner surface of the rotating groove. A rotating shaft is fixedly connected to the lower end of the connecting seat. The outer surface of the rotating shaft is slidably connected to the inner surface of the rotating shaft. A drill bit is fixedly connected to the lower end of the rotating shaft.
[0008] Preferably, the upper end of the connecting seat is provided with a square groove that matches the square block, and the upper end of the square block is fixedly connected to a rotating seat two. The upper end of the rotating seat two is connected to the inner chuck of the sleeve rotator when in the anchoring section.
[0009] Preferably, the sealing assembly includes a connecting frame, a rotating platform is fixedly connected to the lower end of the connecting frame, four rotating connecting rods are rotatably connected to the outer surface of the rotating platform, a rotating seat three is rotatably connected to the end of each of the four rotating connecting rods away from the rotating platform, a spring one is fixedly connected to both sides of each of the four rotating seats three, and the ends of the eight springs one away from the rotating seats three are together fixedly connected to the outer surface of the rotating platform.
[0010] Preferably, each of the four rotating seats is fixedly connected to a sleeve at the end away from the rotating connecting rod, and each of the four sleeves is fixedly connected to a spring 2 at the inner surface of the sleeve. Each of the four spring 2s is fixedly connected to a sliding rod that slides on the inner surface of the sleeve, and each of the four sliding rods is fixedly connected to an insert rod at the end away from the sleeve.
[0011] Preferably, each of the four rubber sheets has a hole at one end near the sliding rod, and the outer surface of the four insert rods forms an elastic interference fit with the hole on the surface of the rubber sheet. The upper end of the drill bit is fixedly connected to a scraper that slides in connection with the inner surface of the steel pipe.
[0012] Preferably, the upper end of the connecting frame at the top is fixedly connected to the lower end of the rotating seat.
[0013] Preferably, the disengagement assembly includes a mounting base fixedly connected to an outer surface of the rotating shaft. Airbags are fixedly connected to both the front and rear sides of the lower end of the mounting base. Movable plates are fixedly connected to the lower ends of the two airbags. Telescopic rods are provided at the upper ends of the two movable plates. When the rotating platform on the same side rises, it touches the movable plates and squeezes the airbags.
[0014] Preferably, the lower ends of both airbags are fixedly connected to air tubes, and the ends of the two air tubes away from the airbags pass through the interiors of two sleeves, sliding rods and insert rods on the same side, and are connected to a suitable rubber sheet.
[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through the cooperation of various components, solves the common problems in traditional construction, such as the grouting port being easily blocked by soil and gravel, uneven grout diffusion leading to reinforcement failure, and low efficiency of manual sealing. Specifically, by utilizing the rising and falling of the sealing components, the grouting port is sealed and an initial space is reserved in the soil outside the grouting port, ensuring the smooth flow of subsequent grouting channels. During the rising process, the detachment component inflates the rubber sheet, causing it to expand and detach from the sliding rod. During subsequent grouting, this guides the grout to spread evenly in all directions and penetrate into the slope soil, avoiding problems such as "insufficient local grouting" or "grout loss," thus improving the overall stability and construction efficiency of slope reinforcement.
[0016] 2. This invention, through the cooperation of a rotary drilling assembly and a sealing assembly, ensures that the steel pipe remains tightly against the inner wall of the pipe during descent. This avoids the problem of soil and gravel intruding into the pipe from the grouting port due to the lag in traditional manual sealing. After the steel pipe has completely reached the stable bedrock, the rising of the sealing and detachment assemblies pushes the rubber sheet outward, leaving an initial gap outside the grouting port. The detachment assembly then evenly delivers gas to the rubber sheet, causing it to expand and detach from the sliding rod, thus tightly adhering to the outside of the grouting port to form a protective barrier. This also achieves the progression and diffusion of grout during grouting, improving the overall stability and construction efficiency of slope reinforcement, and ensuring the continuity and reliability of various slope reinforcement operations. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the rotating seat of the present invention; Figure 4 This is a schematic diagram of the internal structure of the rotating shaft of the present invention; Figure 5This is a schematic diagram of the sealing assembly of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the diagram; Figure 7 This is a schematic diagram of the connection structure between the sleeve and the sliding rod of the present invention; Figure 8 This is a schematic diagram of the detachable component of the present invention; Figure 9 This is a schematic diagram of another state structure of the detached component of the present invention.
[0018] In the diagram: 1. External lifting assembly; 11. Mounting base; 12. Motor; 13. Casing rotary head; 2. Rotary drilling assembly; 21. Rotating seat one; 211. Limiting block; 22. T-shaped locking block; 23. Rotating shaft one; 231. Rotating groove; 24. Connecting seat; 25. Rotating shaft two; 26. Drill head; 27. Rotating seat two; 28. Square block; 3. Sealing assembly; 31. Connecting frame; 32. Rotating table; 321. Spring one; 33. Rotating connecting rod; 34. Rotating seat three; 35. Casing; 36. Spring two; 37. Sliding rod; 38. Inserting rod; 39. Rubber sheet; 310. Scraper; 4. Disengagement assembly; 41. Mounting base; 42. Airbag; 43. Telescopic rod; 44. Movable plate; 45. Air pipe. Detailed Implementation
[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0020] Example 1, as Figure 1-2 As shown, a steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement includes an external lifting component 1. An installation base 11 is installed on one side of the external lifting component 1. A motor 12 is fixedly connected to the side of the installation base 11 away from the external lifting component 1. A sleeve rotary device 13 is fixedly installed at the output end of the motor 12. The sleeve rotary device 13 includes an outer chuck and an inner chuck. A rotary drilling component 2 is installed at the lower end of the sleeve rotary device 13. Six sealing components 3 are provided at the lower end of the sleeve rotary device 13 to block the grouting port on the surface of the steel pipe. Each of the six sealing components 3 includes a sliding rod 37 and a rubber sheet 39. A detachment component 4 is provided on the upper side of each sealing component 3 to inflate the rubber sheet 39 so that it detaches from the sliding rod 37.
[0021] The aforementioned casing rotary device 13 belongs to the conventional technical field of the prior art. The outer chuck and the inner chuck can be controlled separately, and their release and clamping can be controlled separately by an independent power drive system.
[0022] During operation, the outer chuck is mainly used to clamp the outer steel pipe, while the inner chuck is used for the inner rotating seat 21 or rotating seat 27. When clamping is required, the power device of the corresponding chuck drives the jaws to retract radially and clamp the workpiece through the mechanical locking structure. When releasing, the power device moves in the opposite direction, the jaws open radially, and the workpiece is released.
[0023] In the operation of this embodiment, the cooperation of various components solves the problems commonly found in traditional construction, such as the grouting port being easily blocked by soil and gravel, uneven grout diffusion leading to reinforcement failure, and low efficiency of manual sealing. Specifically, the rising and falling of the sealing component 3 achieves the effect of sealing the grouting port and reserving initial space in the soil outside the grouting port, ensuring the smooth flow of subsequent grouting channels. During the rising process, the detachment component 4 inflates the rubber sheet 39, causing it to expand and detach from the sliding rod 37. During subsequent grouting, this guides the grout to spread in all directions and evenly penetrate into the slope soil, avoiding the problems of "insufficient local grouting" or "grout loss", thus improving the overall stability and construction efficiency of slope reinforcement.
[0024] Example 2, as Figure 2-4 The rotary drilling assembly 2 includes a rotating seat 21 and a square block 28. The rotating seat 21 is initially connected to the inner chuck of the casing rotary device 13. A limit block 211 is fixedly connected to the inner surface of the rotating seat 21. A T-shaped locking block 22 is slidably connected to the inner surface of the rotating seat 21. A rotating shaft 23 is fixedly connected to the lower end of the T-shaped locking block 22. A rotating groove 231 is opened on the inner surface of the rotating shaft 23. A connecting seat 24 is slidably connected to the inner surface of the rotating groove 231. A rotating shaft 25 is fixedly connected to the lower end of the connecting seat 24. The outer surface of the rotating shaft 25 is slidably connected to the inner surface of the rotating shaft 23. A drill bit 26 is fixedly connected to the lower end of the rotating shaft 25.
[0025] Specifically, in the initial state, due to gravity, the T-shaped block 22 is located at the bottom of the limiting block 211, and the connecting seat 24 is also located at the bottom of the rotating groove 231; The limiting block 211 can limit the T-shaped locking block 22, so that the T-shaped locking block 22 rotates synchronously with the rotating seat 21.
[0026] Then, the inner chuck of the drive casing rotator 13 is connected to the rotating seat 21. Then, the hydraulic device inside the external lifting assembly 1 is activated to push the rotating seat 21 so that the rotating drilling assembly 2, the sealing assembly 3 and the disengagement assembly 4 are completely placed into the steel pipe. Since the drill head 26 does not contact the slope during this distance, there is no external pressure. Therefore, the T-shaped block 22 and the connecting seat 24 will move downward with the rotating seat 21 as a whole, and they will be in the initial position during the movement until the drill head 26 contacts the slope. In this state, the T-shaped block 22 and the connecting seat 24 stop moving, and the rotating seat 21 continues to move downward. When the top of the inner surface of the rotating seat 21 contacts the upper end of the T-shaped block 22, it will press against the T-shaped block 22 and move downward together. The downward movement of the T-shaped block 22 will bring the rotating shaft 23 downward as a whole. When the upper end of the rotating groove 231 contacts the upper end of the connecting seat 24, the upper end of the rotating shaft 23 will push the connecting seat 24 to descend as well. Among them, the T-shaped locking block 22 and the connecting seat 24 stop moving, while the rotating seat 21 is lowered to lower the sealing component 3 to the corresponding position of the grouting port on the surface of the steel pipe. The number and spacing of the grouting ports are adapted to the sealing component 3 and can be adjusted according to the actual production workpiece. When using it, you only need to lower the six sets of rotating tables 32 to the appropriate position inside the steel pipe, and then rotate them to make the rubber sheet 39 correspond to the grouting port.
[0027] The upper end of the connecting seat 24 is provided with a square groove that matches the square block 28. The upper end of the square block 28 is fixedly connected to the rotating seat 27. The upper end of the rotating seat 27 is connected to the inner chuck of the sleeve rotator 13 when it is in the anchoring section.
[0028] like Figure 5-7 The sealing assembly 3 includes a connecting frame 31. A rotating platform 32 is fixedly connected to the lower end of the connecting frame 31. Four rotating connecting rods 33 are rotatably connected to the outer surface of the rotating platform 32. A rotating seat 34 is rotatably connected to the end of each of the four rotating connecting rods 33 away from the rotating platform 32. Springs 321 are fixedly connected to both sides of each of the four rotating seats 34. The ends of the eight springs 321 away from the rotating seats 34 are fixedly connected to the outer surface of the rotating platform 32.
[0029] Each of the four rotating seats 34 has a sleeve 35 fixedly connected to the end away from the rotating connecting rod 33. Each of the four sleeves 35 has a spring 36 fixedly connected to the inner surface of the sleeve. Each of the four springs 36 has one end fixedly connected to a sliding rod 37 that slides on the inner surface of the sleeve. Each of the four sliding rods 37 has an insert rod 38 fixedly connected to the end away from the sleeve 35.
[0030] Furthermore, the thickness of the rubber sheet 39 after wrapping around the sliding rod 37 is smaller than the size of the grouting port, so it can pass through the grouting port from the inside out, while the area of the rubber sheet 39 after it is fully unfolded is larger than the size of the grouting port.
[0031] Each of the four rubber sheets 39 has a hole at one end near the sliding rod 37. The outer surface of the four insert rods 38 is elastically press-fitted with the hole on the surface of the rubber sheet 39. The upper end of the drill bit 26 is fixedly connected to a scraper 310 that is slidably connected to the inner surface of the steel pipe.
[0032] Furthermore, regarding the connection between the rubber sheet 39 and the insertion rod 38, the opening of the rubber sheet 39 is subjected to radial elastic deformation due to the pressure of the column. The hole wall of the rubber sheet 39 will tightly wrap around the outer wall of the insertion rod 38, forming a stable clamping force. It will not loosen during normal pulling. However, when the pulling force is too large, the rubber sheet 39 and the insertion rod 38 will separate.
[0033] When the entire internal structure of the steel pipe is removed, the scraper 310 will slide close to the inner surface of the steel pipe to scrape away any soil that may have accidentally entered.
[0034] Furthermore, spring 321 can limit the sliding rod 37, keeping it in a position where it is not compressed. Figure 8 When the sealing component 3 enters the steel pipe, the four sliding rods 37 and the insertion rod 38 are restricted by the internal diameter, causing the rubber sheets 39 and the sliding rods 37 to be tilted upwards. During this process, the rubber sheets 39 are always in close contact with the inner surface of the steel pipe. After the T-shaped block 22 and the connecting seat 24 stop moving, the rotating seat 21 continues to descend in order to adjust the correspondence between the sealing component 3 and the grouting port on the surface of the steel pipe. When the upper end of the T-shaped block 22 contacts the upper end of the inner surface of the rotating seat 21, the four rubber sheets 39 at the bottom are in contact with the grouting port at the bottom. This means that the remaining rubber sheets 39 are also in contact with the grouting ports at the same position. If there is a problem with the angle, the motor 12 can be started to drive the rotating seat 21 to rotate as a whole, so that the sealing component 3 also rotates as a whole, thereby corresponding with the grouting port. However, the rubber sheet 39 is still tilted upwards at this time. Under the elastic action of the second spring 36, part of the rubber sheet 39 will enter the grouting port, but it will not completely block the grouting port. Therefore, it is necessary to control the external lifting component 1 at the overall rising position so that the rotating connecting rod 33 and the rotating seat 34 push the sleeve 35, the sliding rod 37 and the rubber sheet 39 upwards towards the grouting port. This will cause the rubber sheet 39 to first shrink due to the compression of the grouting port, and then unfold after passing through the grouting port, and fit against the outer surface of the steel pipe. At this moment, the rotating seat 21 can only drive the rotating table 32 to move. The T-shaped block 22 and the connecting seat 24 remain stationary. Thus, the sealing of the grouting port and the rubber sheet 39 is completed. Finally, at the point of re-descent, the upper end of the T-shaped block 22 is restored to contact with the upper end of the inner surface of the rotating seat 21. Since the rubber sheet 39 is already outside the steel pipe and has been unfolded, this descent distance will only make the rubber sheet 39 fit more tightly against the outside of the grouting port on the surface of the steel pipe, preventing soil from entering from the grouting port, and will maintain this tension until the steel pipe is completely inserted into the stable bedrock.
[0035] Subsequently, the outer chuck of the control sleeve rotator 13 clamps the steel pipe, and the hydraulic device of the external lifting component 1 and the motor 12 are simultaneously activated to drive the steel pipe and its internal structure to be pushed into the soil in sync.
[0036] Once the steel pipe reaches stable bedrock, the advance stops, and the inner and outer chucks of the casing rotator 13 release their clamping on the motor 12 and the steel pipe itself. The external lifting assembly 1 is then controlled to lift the motor 12 upwards. The rotating seat 27 passes through the rotating seat 21 and is inserted into the T-shaped block 22 and the rotating shaft 23, so that the square block 28 is locked in the square groove at the upper end of the connecting seat 24. Then, the inner chuck is controlled to clamp the rotating seat 27, and the external lifting assembly 1 is started to run synchronously with the motor 12, so that the rotating seat 27 pushes against the connecting seat 24, the rotating shaft 25 and the drill head 26 and descends and rotates together to drill a deep hole for anchoring in the hard rock. During this step, the sealing assembly 3 and the steel pipe body are both in a stationary state.
[0037] Finally, after drilling is completed, the inner chuck re-clamps the rotating seat 21 and rises under the drive of the external lifting component 1. Because the upper end of the T-shaped block 22 is in contact with the upper end of the limiting block 211, the T-shaped block 22 remains stationary when it first rises, while the six sealing components 3 rise synchronously. When the rotating platform 32 at the corresponding position rises to the horizontal position of the rubber sheet 39, the sliding rod 37 and the rubber sheet 39 are protruding into the soil outside the steel pipe, thus reserving an initial space outside the grouting port to further prevent the mud from being blocked by the soil as soon as it is sprayed out. As it continues to rise, the sliding rod 37 tilts and gradually moves out of the grouting port. The scraper 310 is used to scrape away some of the soil brought out when the sliding rod 37 retracts.
[0038] The upper end of the connecting bracket 31 located at the top is fixedly connected to the lower end of the rotating seat 21.
[0039] like Figure 8-9 The detachment component 4 includes a mounting base 41 fixedly connected to the outer surface of the rotating shaft 23. Airbags 42 are fixedly connected to the front and rear sides of the lower end of the mounting base 41. Movable plates 44 are fixedly connected to the lower ends of the two airbags 42. Telescopic rods 43 are provided at the upper ends of the two movable plates 44. When the rotating platform 32 on the same side rises, it touches the movable plate 44 and squeezes the airbags 42.
[0040] The lower ends of the two airbags 42 are fixedly connected to air tubes 45. The ends of the two air tubes 45 away from the airbags 42 pass through the interiors of the two sleeves 35, the sliding rod 37 and the insertion rod 38 on the same side, and are connected to the matching rubber sheet 39.
[0041] The rubber sheet 39 is connected to the air tube 45 by an interference fit, and the rubber sheet 39 is equipped with a one-way valve inside, which can only allow air to enter but not to exit. Therefore, when the air tube 45 is separated from the rubber sheet 39, the rubber sheet 39 is still in an expanded state.
[0042] Furthermore, as the rotating platform 32 passes the horizontal position of the sliding rod 37 and continues to move upward, the rotating platform 32 will squeeze the upper air bladder 42, causing gas to enter the rubber sheet 39 through the air pipe 45, causing the rubber sheet 39 to expand. When the air bladder 42 is squeezed to its limit, the lower end of the T-shaped block 22 contacts the lower end of the inner surface of the rotating seat 21. Then, the rotating drilling assembly 2, the sealing assembly 3, and the detachment assembly 4 will rise synchronously as a whole. Since the rubber sheet 39 has fully expanded, it cannot enter the grouting port. Continued pulling causes the insertion rod 38 to detach from the rubber sheet 39. The rubber sheet 39 is left in the soil outside the steel pipe and adheres to the grouting port to prevent external soil from entering the steel pipe.
[0043] The rubber sheet 39 remaining in the soil will not have any impact on the environment or engineering structure. During the grouting process, it will be instantly pushed open by the high-pressure cement grout and immediately encased, ultimately permanently sealed within the solidified high-strength cementite. This hard, dense cement body completely isolates it from the surrounding soil and groundwater, therefore, its inert chemical components have no possibility of leaching or leaking into the environment. Furthermore, as a tiny, stable, and completely encapsulated inclusion within this massive anchoring structure, it is physically similar to a harmless grain of sand, posing no threat to the long-term load-bearing capacity or structural integrity of the anchoring structure.
[0044] Subsequently, anchor bars are inserted and grouting is performed using packers in existing technologies. This structure belongs to the conventional technical field in existing technologies. The packer forms a movable sealing section inside the tubing, isolating the grouting space from other areas. Then, pressure is used to accurately inject the grout into the target stratum or gap, avoiding waste and leakage.
[0045] During operation, the packer, typically made of rubber and an expansion-sealing structure, is first lowered into the grouting section of the steel pipe pile along with the tubing string. Then, a pressurized liquid or gas medium is introduced into the packer through the tubing string, causing the rubber sleeve to expand under pressure and tightly adhere to the inner wall of the tubing string and the borehole wall, forming two sealing surfaces and enclosing the middle area as an independent "grouting cavity." Grout is then injected into this sealed cavity through the tubing string. The grouting pressure continuously increases, and when it exceeds the tolerance threshold of the formation or gaps, the grout will breach the boundary of the sealed cavity, seeping into and filling the surrounding soil, rock fissures, or the gap between the tubing string and the borehole wall. After grouting is completed, the pressure inside the packer is released, the rubber sleeve contracts and resets, and the packer can then be removed along with the tubing string. The entire process achieves directional and efficient grout injection, minimizing loss.
[0046] Simultaneously, the packer ensures that the slurry has sufficient power to spray out from the grouting port, while the rubber sheet 39 is first pushed open by the slurry and moves along the previously protruding gap. During this process, the rubber sheet 39 acts as a guide plate, and the slurry is not sprayed directly in a single direction, but rather pushes the rubber sheet 39 to diffuse radially along the gap. When the rubber sheet 39 moves to the end of the gap and is blocked by the soil, the slurry splashes outward from the gap between the rubber sheet 39 and the soil, achieving a progressive diffusion that first fills the preset gap and then penetrates the surrounding soil. This avoids the problem of slurry being concentrated at one point in traditional grouting, leading to local oversaturation and insufficient slurry in other areas, making the combination of slurry and slope soil more uniform and the reinforcement effect more stable.
[0047] It should be noted that the steel pipe itself, acting as a "reinforcement" with high shear and tensile strength, is implanted and penetrates the potential sliding surface of the slope until it is anchored in the deep stable strata. It provides the most direct shear resistance to the slope. However, relying solely on the friction between the steel pipe and the soil, i.e., "passive anchoring," the reinforcement effect is very limited. Therefore, grouting is required. High-pressure cement grout is injected into the soil from the grouting holes in a "jet" manner. This high-pressure energy will produce three key effects depending on the soil type: Penetration cementation: In the gravel layer, the grout forcibly "penetrates" into the pores of the soil particles, "cementing" the loose particles into a hard artificial cement soil. Compaction: In soft clay, the grout cannot penetrate, so it forms continuously expanding grout bubbles at the pore opening, squeezing the soft soil outwards like a balloon, compacting it, and greatly increasing its density and strength. Splitting and locking: In dense, hard soil or rock layers, high pressure will "split" the soil, and grout will be injected into the cracks to form a mesh of "reinforcing ribs" that lock the broken soil and rock.
[0048] Ultimately, the hardened cement slurry not only forms a strong "first bonding interface" with the outer wall of the steel pipe, but more importantly, it forms a "second friction interface" with the soil it has modified, cemented, compacted, and split. This transforms the originally thin steel pipe into a "composite anchor body" formed by the combined action of the steel pipe, cement slurry, and modified soil. The effective diameter of this composite body is much larger than that of the steel pipe itself, thus amplifying the sidewall friction between it and the surrounding "unmodified" soil. When the slope tends to slide, this enormous frictional force is efficiently transferred through the two interfaces to the high-strength steel pipe, and then from the steel pipe to the stable stratum. Like rows of giant "stitching nails," it firmly stitches the sliding body to the stable bedrock, fundamentally improving the shear strength and stability of the entire slope.
[0049] Therefore, this solution, through the cooperation of the rotary drilling assembly 2 and the sealing assembly 3, ensures that the steel pipe remains tightly against the inner wall of the pipe during descent, avoiding the problem of soil and gravel intruding into the pipe from the grouting port due to the lag in traditional manual sealing. After the steel pipe has completely reached the stable bedrock, the rising of the sealing assembly 3 and the detachment assembly 4 will push the rubber sheet 39 outward, leaving an initial gap outside the grouting port. The detachment assembly 4 will evenly deliver gas to the rubber sheet 39, causing it to expand and detach from the sliding rod 37, making it tightly adhere to the outside of the grouting port to form a protective barrier. This also achieves the progression and diffusion of grout during grouting, improving the overall stability and construction efficiency of slope reinforcement, and ensuring the continuity and reliability of various slope reinforcement operations.
[0050] It should be noted that the specific installation method, circuit connection method, and control method of the hydraulic device, motor 12 and sleeve rotator 13 used in this invention are all conventional designs, and will not be described in detail in this invention.
[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement, comprising an external lifting assembly (1), wherein a mounting base (11) is installed on one side of the external lifting assembly (1), and a motor (12) is fixedly connected to the side of the mounting base (11) away from the external lifting assembly (1), and a sleeve rotator (13) is fixedly installed at the output end of the motor (12), wherein the sleeve rotator (13) comprises an outer chuck and an inner chuck, characterized in that: The lower end of the casing rotary (13) is equipped with a rotary drilling assembly (2), and the lower end of the casing rotary (13) is provided with six sealing assemblies (3) that can block the grouting port on the surface of the steel pipe. Each of the six sealing assemblies (3) includes a sliding rod (37) and a rubber sheet (39). The upper side of each sealing assembly (3) is provided with a disengagement assembly (4) that can inflate the rubber sheet (39) to make it detach from the sliding rod (37).
2. The steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement according to claim 1, characterized in that: The rotary drilling assembly (2) includes a rotating seat (21) and a square block (28). The rotating seat (21) is initially connected to the inner chuck of the casing rotary device (13). A limit block (211) is fixedly connected to the inner surface of the rotating seat (21). A T-shaped locking block (22) is slidably connected to the inner surface of the rotating seat (21). A rotating shaft (23) is fixedly connected to the lower end of the T-shaped locking block (22). A rotating groove (231) is opened on the inner surface of the rotating shaft (231). A connecting seat (24) is slidably connected to the inner surface of the rotating groove (231). A rotating shaft (25) is fixedly connected to the lower end of the connecting seat (24). The outer surface of the rotating shaft (25) is slidably connected to the inner surface of the rotating shaft (23). A drill bit (26) is fixedly connected to the lower end of the rotating shaft (25).
3. The steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement according to claim 2, characterized in that: The upper end of the connecting seat (24) is provided with a square groove that matches the square block (28). The upper end of the square block (28) is fixedly connected to a rotating seat (27). The upper end of the rotating seat (27) is connected to the inner chuck of the sleeve rotator (13) in the anchoring section.
4. The steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement according to claim 2, characterized in that: The sealing assembly (3) includes a connecting frame (31), and a rotating platform (32) is fixedly connected to the lower end of the connecting frame (31). Four rotating rods (33) are rotatably connected to the outer surface of the rotating platform (32). Rotating seats (34) are rotatably connected to the ends of the four rotating rods (33) away from the rotating platform (32). Springs (321) are fixedly connected to both sides of the four rotating seats (34). The ends of the eight springs (321) away from the rotating seats (34) are fixedly connected to the outer surface of the rotating platform (32).
5. The steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement according to claim 4, characterized in that: Each of the four rotating seats (34) is fixedly connected to a sleeve (35) at one end away from the rotating connecting rod (33). Each of the four sleeves (35) is fixedly connected to a spring (36) at one end. Each of the four springs (36) is fixedly connected to a sliding rod (37) that slides on the inner surface of the sleeve (35). Each of the four sliding rods (37) is fixedly connected to an insert rod (38) at one end away from the sleeve (35).
6. The steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement according to claim 5, characterized in that: The four rubber sheets (39) are provided with holes at one end near the sliding rod (37). The outer surface of the four insert rods (38) and the holes on the surface of the rubber sheets (39) are elastically interference-fitted. The upper end of the drill bit (26) is fixedly connected to a scraper (310) that is slidably connected to the inner surface of the steel pipe.
7. The steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement according to claim 4, characterized in that: The upper end of the connecting bracket (31) located at the top is fixedly connected to the lower end of the rotating seat (21).
8. The steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement according to claim 5, characterized in that: The detachment assembly (4) includes a mounting base (41) fixedly connected to the outer surface of the rotating shaft (23). Airbags (42) are fixedly connected to both the front and rear sides of the lower end of the mounting base (41). Movable plates (44) are fixedly connected to the lower ends of the two airbags (42). Telescopic rods (43) are provided at the upper ends of the two movable plates (44). When the rotating platform (32) on the same side rises, it touches the movable plate (44) and squeezes the airbags (42).
9. A steel pipe pile anchor bar driving device for slope landslide treatment and reinforcement according to claim 8, characterized in that: The lower ends of the two airbags (42) are fixedly connected to air tubes (45). The ends of the two air tubes (45) away from the airbags (42) pass through the interiors of the two sleeves (35), sliding rods (37) and insert rods (38) on the same side, and are connected to the matching rubber sheet (39).