Underground space engineering anti-floating pile structure

Abstract

The invention relates to the technical field of underground engineering construction, and discloses an anti-floating pile structure for underground space engineering, which is characterized in that an anti-floating pile main body adopts an internal and external combined steel pipe structure, two times of grouting are respectively completed by a grouting port, and a primary normal-pressure grouting material is more stably anchored in a foundation structure by a secondary high-pressure grouting material; the anti-floating effect of the anti-floating pile is further improved; in order to ensure effective proceeding of secondary high-pressure grouting, a plugging structure is additionally arranged on the top of the anti-floating pile body, and a radial sealing plate and a plugging disc are combined to form the plugging structure with the variable outer diameter, so that effective proceeding of secondary high-pressure grouting is ensured. During secondary grouting, the one-way telescopic body can ensure that the front body of the separation structure is anchored in a pile hole, the anti-floating effect of the anti-floating pile is improved, the steel strand is lifted up to drive the outer anchor rod to anchor, and the anchoring effect is guaranteed. The anti-floating performance of the anti-floating pile in various soil layers, especially low-permeability soil layers, is improved through the synergistic effect.

Description

Technical Field

[0001] This invention relates to the field of underground engineering construction technology, specifically to an anti-buoyancy pile structure for underground space engineering. Background Technology

[0002] Traditional anti-buoyancy piles are often cast together with the upper surface to increase the overall resistance to deformation, thereby improving the local anti-buoyancy capacity. Alternatively, the load on the anti-buoyancy piles can be increased to enhance the anti-buoyancy capacity. However, in the construction of basements, the design is closer to the ground and the load is lower, making them more susceptible to buoyancy. As a result, the anti-buoyancy capacity of traditional anti-buoyancy piles is insufficient, making it difficult to guarantee the anti-buoyancy effect.

[0003] Anti-buoyancy piles primarily rely on lateral friction, with most existing piles depending on the lateral friction between the pile and the surrounding soil. When groundwater exerts an upward buoyancy force on the foundation, the anti-buoyancy pile, through close contact between its surface and the soil, transfers the buoyancy to deeper, stable soil layers, thus balancing the buoyancy load and ensuring the overall stability of the structure. However, this method is ineffective for foundations in soils with low permeability, leading to pile floating. Floating piles cannot effectively transfer the buoyancy load, potentially causing overall foundation instability and posing a serious threat to the safety of the building structure. Therefore, it is urgent to address this problem.

[0004] Therefore, the applicant proposed an anti-buoyancy pile structure for underground space engineering. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-buoyancy pile structure for underground space engineering, solving the following technical problems: Anti-buoyancy piles mainly rely on lateral friction, and most existing anti-buoyancy piles depend primarily on the lateral friction between the pile body and the surrounding soil layers. When groundwater exerts an upward buoyancy force on the foundation, the anti-buoyancy pile, through close contact between its surface and the soil layer, transfers the buoyancy force to a deeper stable soil layer, thereby balancing the buoyancy load and ensuring the overall stability of the structure. However, this method is ineffective for foundation construction in soil layers with low permeability, leading to floating. The floating pile cannot effectively transfer the buoyancy load, potentially causing overall foundation instability and posing a serious threat to the safety of the building structure. Therefore, it is urgent to solve this problem.

[0006] The objective of this invention can be achieved through the following technical solutions: An anti-buoyancy pile structure for underground space engineering includes an anti-buoyancy pile body. An anchoring plate is installed at the bottom of the anti-buoyancy pile body, and a hinge seat is installed on the outside of the anchoring plate. The hinge seat is connected to an outer anchor rod through a connecting rod. The body of the outer anchor rod is provided with a sliding groove, and a sliding shaft is installed in the sliding groove. The sliding shaft is installed on the connecting rod. A steel strand is connected to the bottom of the outer anchor rod. The steel strand passes through the anchoring plate and the sealing plate and is fixed by a lock head. Multiple sealing plates are fitted on the top of the anti-buoyancy pile body. Radial sealing plate one and radial sealing plate two are installed on the sealing plate. Multiple partition structures are distributed circumferentially on the outer side of the anti-buoyancy pile body.

[0007] As a further embodiment of the present invention: the two ends of the first radial sealing plate are provided with female grooves, and the two ends of the second radial sealing plate are provided with male grooves. The male grooves and female grooves are horizontally fitted together, and the ends of the first radial sealing plate and the second radial sealing plate are both flat cut surfaces.

[0008] As a further aspect of the present invention: the sealing disc is provided with a hole that fits onto the outside of the corresponding outer pipe and is sealed to the outer pipe.

[0009] As a further aspect of the present invention: the sealing disc is provided with four radial T-shaped grooves, and the bottom of the four radial T-shaped grooves is provided with T-shaped blocks that slide in the corresponding radial T-shaped grooves.

[0010] As a further embodiment of the present invention: both radial sealing plate one and radial sealing plate two are equipped with locking components. The locking components include toothed surfaces disposed at the bottom of the radial T-groove and a movable block that slides within the radial T-groove. The bottom of the movable block is a toothed surface, and a bolt is rotatably mounted on the top of the movable block. The bolt is threadedly connected to the corresponding radial sealing plate.

[0011] As a further embodiment of the present invention: the partition structure includes a side body, a front body and an end body. The front body is connected to the outside of the grouting channel one through the end body and the side body. The side body is made of elastic material and has a cut blind slit on its inner wall along the length direction. The end body is a telescopic structure. A one-way telescopic body is installed between the front body and the outside of the grouting channel one.

[0012] As a further aspect of the present invention: the unidirectional telescopic body includes a fixing sleeve, the fixing sleeve is installed on the back of the front body, a connecting column is fitted inside the fixing sleeve, the connecting column is fixed on the outside of the grouting channel, and an elastic anti-reverse body is installed on the fixing sleeve.

[0013] As a further aspect of the present invention: an anchor head is provided on the surface of the front body.

[0014] As a further embodiment of the present invention: the end face body includes a fixed plate and a movable plate. The fixed plate is fixed on the outer wall of the grouting channel one, and the movable plate is connected to the end face body and slides and seals relative to the fixed plate.

[0015] This invention also discloses a construction method for an anti-buoyancy pile structure in underground space engineering, comprising the following steps: S1. Drilling and excavation; After the foundation pit is excavated to the predetermined depth, the bottom of the foundation pit is leveled, and the lines are marked on the bottom of the pit to obtain the pile hole position lines. Drilling equipment is used to excavate at the pile hole position lines to the set depth. S2. Construction of the main anti-buoyancy piles; The main body of the anti-buoyancy pile is lowered into the pile hole by a truck crane. The bottom of the main body of the anti-buoyancy pile is equipped with a steel mesh. The main body of the anti-buoyancy pile is equipped with a grouting channel one and a grouting channel two located inside the grouting channel one. The top of the grouting channel one and the grouting channel two are respectively connected to grouting equipment one and grouting equipment two through their respective external joints. The bottom of the grouting channel two extends to the top of the steel mesh. Multiple partition structures are distributed circumferentially on the outer side of the anti-buoyancy pile main body. Multiple partition structures are distributed circumferentially. The area between two adjacent partition structures forms a separate grouting area. The grouting area is connected to the grouting port one and the grouting channel two. The interior of the partition structure is a hollow structure and is connected to the grouting channel one through the grouting port two. The side of the partition structure facing the grouting area is supported by elastic material. S3, Grouting of the grouting area; Grouting is performed through the external grouting equipment 2 to the grouting channel 2. The injected grout first enters above the steel mesh and fills the bottom area of ​​the pile hole. After the bottom pile hole is completely filled, the injected mortar enters the grouting area through the grouting port 1 until all grouting in the grouting area is completed and the external joint interface at the top of the grouting channel 2 is sealed. S4, Top sealing; The top of the anti-buoyancy pile is fitted with multiple sealing discs. Radial sealing plate one and radial sealing plate two are installed on the sealing discs. There are two radial sealing plates one and two radial sealing plates two symmetrically arranged. Radial sealing plate one and radial sealing plate two slide relative to the sealing discs. Locking parts are installed on radial sealing plate one and radial sealing plate two. The top sealing operation of the pile hole is completed by fixing the locking parts on radial sealing plate one and radial sealing plate two to the sealing disc. S5. Grouting within the partition structure; Grouting is performed through a pair of grouting channels connected to an external grouting device. The grouting pressure of the first grouting device is greater than that of the second grouting device. During grouting, the injected mortar fills the internal area of ​​the partition structure. The partition structure is squeezed into the grouting areas on both sides until the elastic material is cracked. The grout penetrates, diffuses and squeezes into the surrounding strata of the anchoring section, improving the structural strength between the grout and the foundation.

[0016] The beneficial effects of this invention are: (1) The present invention adopts an inner and outer combined steel pipe structure for the main body of the anti-buoyancy pile, and uses the grouting port to complete two groutings respectively. The secondary high pressure grouting material is used to anchor the primary normal pressure grouting material more stably in the foundation structure, thereby improving the anti-buoyancy effect of the anti-buoyancy pile; (2) In order to ensure the effective implementation of secondary high-pressure grouting, the present invention adds a sealing structure to the top of the anti-buoyancy pile body, and uses a combination of radial sealing plate and sealing disc to form a sealing structure with variable outer diameter to ensure the effective implementation of secondary high-pressure grouting.

[0017] (3) During secondary grouting, the present invention can use a one-way telescopic body to ensure that the front body of the partition structure is anchored in the pile hole, thereby further improving the anti-buoyancy effect of the anti-buoyancy pile. Secondly, the external anchor rod is anchored in the pile hole by lifting the steel strand to ensure the anchoring effect.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 Enlarged view of a section at point B; Figure 4 This is a top view of the sealing disc and radial sealing plate of the present invention when they are in the sealing position; Figure 5 This is a top view of the sealing disc and radial sealing plate of the present invention when they are not sealed. Figure 6 This is a cross-sectional view of the anti-buoyancy pile body of the present invention; Figure 7 for Figure 6 A magnified view of a section at point C; Figure 8 This is a cross-sectional view of the partition structure of the present invention; Figure 9 This is a top view showing the combination of the anchoring disc and the outer anchor rod of the present invention.

[0021] In the diagram: 10. Main body of anti-buoyancy pile; 11. Anchor plate; 12. Hinge seat; 13. External anchor rod; 14. Sliding groove; 15. Steel strand; 16. Sliding shaft; 20. Reinforcing mesh; 30. Grouting channel two; 40. Grouting channel one; 50. Separation structure; 51. Front body; 52. End face body; 521. Movable plate; 522. Fixed plate; 53. Side body; 55. Fixed sleeve; 56. Elastic anti-reverse body; 60. Grouting port one; 70. Grouting port two; 80. Sealing plate; 81. Radial sealing plate one; 811. Female groove; 812. Male groove; 82. Radial sealing plate two; 83. Locking element; 831. Tooth surface; 832. Moving block; 833. Bolt; 84. Radial T-groove. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0024] In the field of underground engineering technology, in the construction of anti-buoyancy piles for underground space engineering, anti-buoyancy piles mainly rely on lateral friction. Most existing anti-buoyancy piles improve their anti-buoyancy effect by increasing the friction on the sides. However, this method is not effective for foundation construction in soil layers with low permeability, and the anti-buoyancy piles may float. To address the above-mentioned problems with traditional construction techniques, this invention improves the anti-buoyancy effect of anti-buoyancy piles through innovative structural design: Example 1: As Figures 1 to 5 As shown, the construction steps of an anti-buoyancy pile structure for underground space engineering are as follows: S1. Drilling and excavation: After the foundation pit is excavated to the predetermined depth using construction machinery, the bottom of the foundation pit is leveled, and lines are marked on the bottom of the pit to obtain the pile hole position lines. Drilling equipment is then used to excavate at the pile hole position lines to the set depth. S2, Construction of the main body of the anti-buoyancy pile 10: The anti-buoyancy pile body 10 is lowered into the pile hole by a truck crane. The bottom of the anti-buoyancy pile body 10 is provided with a steel mesh 20. The anti-buoyancy pile body 10 is provided with a grouting channel 1 40 and a grouting channel 2 30 located inside the grouting channel 1 40. The top of the grouting channel 1 40 and the grouting channel 2 30 are respectively connected to grouting equipment 1 and grouting equipment 2 through their respective external joints. The bottom of the grouting channel 2 30 extends to the top of the steel mesh 20. Multiple partition structures 50 are distributed circumferentially on the outer side of the anti-buoyancy pile body 10. Multiple partition structures 50 are distributed circumferentially. The area between two adjacent partition structures 50 forms a separate grouting area. The grouting area is connected to the grouting channel 2 30 through the grouting port 1 60. The interior of the partition structure 50 is a hollow structure and is connected to the grouting channel 1 40 through the grouting port 2 70. The side of the partition structure 50 facing the grouting area is supported by elastic material. S3, Grouting of the grouting area; Grouting is performed on grouting channel 2 30 by external grouting equipment 2. The injected grout first enters above the steel mesh 20 and fills the bottom area of ​​the pile hole. After the bottom pile hole is completely filled, the injected mortar enters the grouting area through grouting port 1 60 until all grouting in the grouting area is completed and the external joint interface at the top of grouting channel 2 30 is sealed. S4, Top sealing; After grouting in the grouting area, multiple sealing discs 80 are fitted on the top of the anti-buoyancy pile body 10. Radial sealing plate one 81 and radial sealing plate two 82 are installed on the sealing disc 80. There are two radial sealing plates one 81 and two radial sealing plates two 82 symmetrically arranged. The radial sealing plates one 81 and two radial sealing plates two 82 slide relative to the sealing disc 80. Locking parts 83 are installed on both radial sealing plates one 81 and two radial sealing plates two 82. The top sealing operation of the pile hole is completed by fixing the locking parts 83 on the radial sealing plates one 81 and two radial sealing plates two 82 to the sealing disc 80. S5, Grouting within the 50mm partition structure; Grouting is performed through a pair of grouting channels 40 connected to an external grouting device. The grouting pressure of the first grouting device is greater than that of the second grouting device. During grouting, the injected mortar fills the internal area of ​​the partition structure 50. The partition structure 50 is squeezed into the grouting areas on both sides until the elastic material is cracked. The grout penetrates, diffuses and squeezes into the surrounding strata of the anchoring section twice, improving the structural strength between the grout body and the foundation.

[0025] It is important to note that secondary grouting is generally recommended to be performed 4-6 hours after the primary grouting. At this time, the primary grout is in the critical stage of transitioning from initial to final setting. Although the grout has begun to lose its fluidity, it has not yet fully hardened, and its internal structure still retains a certain degree of plasticity and porosity. In this state, the secondary grout can smoothly penetrate and fill the tiny gaps inside the primary grout using its own pressure, forming a tight bond with the surface layer. This achieves effective bonding between the two grout layers, significantly improving the overall density and structural strength of the grout. If the grouting time is set after 12 hours or even 24 hours, the primary grout may have already solidified and gained a certain strength. At this point, the secondary grout will be unable to break through the primary grout, leading to process failure.

[0026] Example 2 In Example 1, as Figure 1 and Figure 3 , Figure 9 As shown, in order to further ensure the anchoring effect and effectively ensure that the bottom of the anti-buoyancy pile body 10 is equipped with an anchoring plate 11, a hinge seat 12 is installed on the outside of the anchoring plate 11, and the hinge seat 12 is connected to the outer anchor rod 13 through the connecting rod 17. The body of the outer anchor rod 13 is provided with a sliding groove 14, and a sliding shaft 16 is installed in the sliding groove 14. The sliding shaft 16 is installed on the connecting rod 17. The bottom of the outer anchor rod 13 is connected with a steel strand 15. The steel strand 15 passes through the anchoring plate 11 and the sealing plate 80 and is fixed by a lock head.

[0027] In practice, by lifting the top of the steel strand 15, the outer anchor rod 13 is forced to extend outward and move upward, thereby anchoring and inserting into the foundation structure. At this time, it is fixed by the lock head to ensure the long-term stability of the structure.

[0028] Example 3 In Example 2, as Figure 2 , Figure 4 , Figure 5 As shown, the radial sealing plate 81 has female grooves 811 at both ends, and the radial sealing plate 82 has male grooves 812 at both ends. The male grooves 812 and female grooves 811 are horizontally fitted together, and the ends of the radial sealing plate 81 and the radial sealing plate 82 are both flat cut surfaces.

[0029] The sealing disc 80 is provided with a hole that fits onto the outside of the corresponding outer pipe and is sealed to the outer pipe; The sealing plate 80 is provided with four radial T-slots 84, and the bottom of the radial sealing plate is provided with T-blocks that slide in the corresponding radial T-slots 84.

[0030] The locking member 83 includes a toothed surface 831 at the bottom of the radial T-groove 84 and a movable block 832 that slides within the radial T-groove 84. The bottom of the movable block 832 is the toothed surface 831, and a bolt 833 is rotatably mounted on the top of the movable block 832. The bolt 833 is threadedly connected to the corresponding radial sealing plate.

[0031] By moving radial sealing plate 1 81 and radial sealing plate 2 82 outward along radial T-groove 84 in sequence, and cooperating with sealing plate 80 to increase size, the top of the anti-buoyancy pile body 10 is sealed, ensuring that secondary high-pressure grouting can be carried out smoothly. After sealing, the adjusting bolt 833 is used to fix the moving block 832 on the tooth surface 831 in radial T-groove 84, and the radial sealing plate is fixed.

[0032] Example 4 In Example 3, as Figure 6 , 7 As shown in Figure 8, the partition structure 50 includes a side body 53, a front body 51, and an end body 52. ​​The front body 51 is connected to the outside of the grouting channel 40 through the end body 52 and the side body 53. The side body 53 is made of elastic material and has a cut blind slit on its inner wall along the length direction. The end body 52 is a telescopic structure. A one-way telescopic body is installed between the front body 51 and the outside of the grouting channel 40.

[0033] The unidirectional telescopic body includes a fixing sleeve 55, which is installed on the back of the front body 51. A connecting column 54 is fitted inside the fixing sleeve 55, and the connecting column 54 is fixed to the outside of the grouting channel 40. An elastic anti-reverse body 56 is installed on the fixing sleeve 55.

[0034] An anchor head is provided on the surface of the front body 51; The end face body 52 includes a fixed plate 522 and a movable plate 521. The fixed plate 522 is fixed on the outer wall of the grouting channel 40. The movable plate 521 is connected to the front face body 51 and slides and seals relative to the fixed plate 522.

[0035] During implementation, the secondary high-pressure grout enters the partition structure 50 through the grouting channel 40 and the grouting port 70. The secondary high-pressure grout first moves the front body 51 outward in one direction, and the outward movement of the front body 51 pushes the primary grout into the foundation structure. When the front body 51 can no longer enter the foundation structure, the secondary high-pressure grout splits the side body 53 along the cut blind joint, thereby forcing the primary grout in the grouting area into the foundation structure, thus ensuring the anti-buoyancy effect of the anti-buoyancy pile.

[0036] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An anti-buoyancy pile structure for underground space engineering, characterized in that, The structure includes an anti-buoyancy pile body (10), an anchor plate (11) is installed at the bottom of the anti-buoyancy pile body (10), a hinge seat (12) is installed on the outside of the anchor plate (11), the hinge seat (12) is connected to an outer anchor rod (13) through a connecting rod (17), a sliding groove (14) is provided on the body of the outer anchor rod (13), a sliding shaft (16) is installed in the sliding groove (14), the sliding shaft (16) is installed on the connecting rod (17), a steel strand (15) is connected to the bottom of the outer anchor rod (13), the steel strand (15) passes through the anchor plate (11) and the sealing plate (80) and is fixed by a lock head, a number of sealing plates (80) are fitted on the top of the anti-buoyancy pile body (10), a radial sealing plate one (81) and a radial sealing plate two (82) are installed on the sealing plate (80), and a number of partition structures (50) are distributed circumferentially on the outside of the anti-buoyancy pile body (10).

2. The anti-buoyancy pile structure for underground space engineering according to claim 1, characterized in that, The radial sealing plate one (81) has female grooves (811) at both ends, and the radial sealing plate two (82) has male grooves (812) at both ends. The male grooves (812) and female grooves (811) are horizontally fitted together. The ends of the radial sealing plate one (81) and the radial sealing plate two (82) are both flat cut surfaces.

3. The anti-buoyancy pile structure for underground space engineering according to claim 2, characterized in that, The sealing disc (80) is provided with a hole that fits onto the outside of the corresponding outer pipe and is sealed to the outer pipe.

4. The anti-buoyancy pile structure for underground space engineering according to claim 2, characterized in that, The sealing disc (80) is provided with four radial T-slots (84), and the bottom of the four radial T-slots (84) is provided with T-blocks that slide in the corresponding radial T-slots (84).

5. The anti-buoyancy pile structure for underground space engineering according to claim 2, characterized in that, Both radial sealing plate one (81) and radial sealing plate two (82) are equipped with locking components (83). The locking component (83) includes a toothed surface (831) at the bottom of the radial T-groove (84) and a moving block (832) that slides in the radial T-groove (84). The bottom of the moving block (832) is the toothed surface (831), and the top of the moving block (832) is rotatably equipped with a bolt (833). The bolt (833) is threadedly connected to the corresponding radial sealing plate.

6. The anti-buoyancy pile structure for underground space engineering according to claim 1, characterized in that, The partition structure (50) includes a side body (53), a front body (51) and an end body (52). The front body (51) is connected to the outside of the grouting channel (40) through the end body (52) and the side body (53). The side body (53) is made of elastic material and has a cut blind seam on its inner wall along the length direction. The end body (52) is a telescopic structure. A one-way telescopic body is installed between the front body (51) and the outside of the grouting channel (40).

7. The anti-buoyancy pile structure for underground space engineering according to claim 6, characterized in that, The one-way telescopic body includes a fixed sleeve (55), which is installed on the back of the front body (51). A connecting column (54) is installed inside the fixed sleeve (55), and the connecting column (54) is fixed on the outside of the grouting channel (40). An elastic anti-reverse body (56) is installed on the fixed sleeve (55).

8. The anti-buoyancy pile structure for underground space engineering according to claim 7, characterized in that, An anchor head is provided on the surface of the front body (51).

9. The anti-buoyancy pile structure for underground space engineering according to claim 6, characterized in that, The end face body (52) includes a fixed plate (522) and a movable plate (521). The fixed plate (522) is fixed on the outer wall of the grouting channel (40). The movable plate (521) is connected to the front face body (51) and slides and seals relative to the fixed plate (522).

10. A construction method for an anti-buoyancy pile structure for underground space engineering according to any one of claims 1-9, characterized in that: Includes the following steps: S1. Drilling and excavation; After the foundation pit is excavated to the predetermined depth, the bottom of the foundation pit is leveled, and the lines are marked on the bottom of the pit to obtain the pile hole position lines. Drilling equipment is used to excavate at the pile hole position lines to the set depth. S2, Construction of the main body (10) of the anti-buoyancy pile; The anti-buoyancy pile body (10) is lowered into the pile hole by a truck crane. A steel mesh (20) is installed at the bottom of the anti-buoyancy pile body (10). A grouting channel one (40) and a grouting channel two (30) located inside the grouting channel one (40) are installed inside the grouting channel one (40). The tops of the grouting channel one (40) and the grouting channel two (30) are respectively connected to grouting equipment one and grouting equipment two through their respective external joints. The bottom of the grouting channel two (30) extends to the top of the steel mesh (20). Multiple partition structures (50) are distributed circumferentially on the outer side of the anti-buoyancy pile body (10). Multiple partition structures (50) are distributed circumferentially. The area between two adjacent partition structures (50) forms a separate grouting area. The grouting area is connected to the first grouting port (60) and the second grouting channel (30). The interior of the partition structure (50) is a hollow structure and is connected to the first grouting channel (40) through the second grouting port (70). The side of the partition structure (50) facing the grouting area is supported by elastic material. S3, Grouting of the grouting area; Grouting is performed on grouting channel 2 (30) by external grouting equipment 2. The injected grout first enters above the steel mesh (20) and fills the bottom area of ​​the pile hole. When the bottom pile hole is completely filled, the injected mortar enters the grouting area through grouting port 1 (60) until all grouting in the grouting area is completed and the external joint interface at the top of grouting channel 2 (30) is sealed. S4, Top sealing; The anti-buoyancy pile body (10) is fitted with multiple sealing discs (80) on top. Radial sealing plate one (81) and radial sealing plate two (82) are installed on the sealing disc (80). There are two radial sealing plates one (81) and two radial sealing plates two (82) symmetrically arranged. Radial sealing plate one (81) and radial sealing plate two (82) slide relative to the sealing disc (80). Locking parts (83) are installed on radial sealing plate one (81) and radial sealing plate two (82). The top sealing operation of the pile hole is completed by fixing the locking parts (83) on radial sealing plate one (81) and radial sealing plate two (82) to the sealing disc (80). S5, Grouting inside the partition structure (50); Grouting is performed through a pair of grouting channels (40) connected to an external grouting device. The grouting pressure of the first grouting device is greater than that of the second grouting device. During grouting, the injected mortar will fill the internal area of ​​the partition structure (50). The partition structure (50) is squeezed into the grouting area on both sides until the elastic material is cracked. The grout penetrates, diffuses and squeezes into the surrounding strata of the anchoring section, thereby improving the structural strength between the grout and the foundation.

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