A concrete precast pile for ground reinforcement

Abstract

This application belongs to the field of precast pile technology and discloses a precast concrete pile for foundation reinforcement, comprising several square tubular piles. Each pile has a connecting square tube at its upper end and a square groove at its lower end. The connecting square tubes on adjacent piles are inserted into the square grooves. A reinforcing plate is provided on the upper part of the outer wall of the pile, with its upper end flush with the connecting square tubes. A drill bit is provided at the lower end of the lowest pile. The pile with the drill bit is driven into the foundation first. Then, the square groove at the bottom of the upper pile is connected to the connecting square tube of the lower pile. At this point, one side of the reinforcing plate on the lower pile contacts the outer wall of the upper pile, further limiting its position and enhancing the stability of the pile connection. The number of piles is selected according to specific needs. The reinforcing plate is embedded in the foundation soil, increasing the contact area between the pile and the foundation, thereby increasing friction and preventing the pile from sinking under load. It has strong pull-out resistance and further ensures the effectiveness of foundation reinforcement.

Description

Technical Field

[0001] This utility model relates to the field of precast pile technology, and in particular to a precast concrete pile for foundation reinforcement. Background Technology

[0002] In construction engineering, the foundation is a crucial component that bears the weight of the superstructure and transfers loads to the underground soil. If the natural foundation has insufficient bearing capacity, excessive settlement, or poor stability, it can lead to cracking, tilting, or even collapse of the building. Therefore, foundation reinforcement techniques are needed to improve foundation performance. Precast concrete piles are a commonly used method for foundation reinforcement.

[0003] Most precast concrete piles currently available are designed as single, fixed-length piles, making it difficult to flexibly adjust them according to the actual bearing capacity requirements and geological conditions of the foundation. Furthermore, the surface of precast concrete square piles is generally smooth, lacking necessary friction, resulting in poor pull-out resistance. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a precast concrete pile for foundation reinforcement.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a precast concrete pile for foundation reinforcement, comprising several pile bodies in the shape of square tubes, wherein the upper end of the pile body is provided with a connecting square tube and the lower end is provided with a square groove, the connecting square tubes on two adjacent pile bodies are inserted into the square groove, a reinforcing plate is provided on the upper part of the outer wall of the pile body, the upper end of the reinforcing plate is flush with the connecting square tube, and a drill bit is provided at the lower end of the pile body at the bottom.

[0006] By adopting the above technical solution, piles and drill bits are installed. During pile driving, the pile with the drill bit is driven into the foundation first. Then, the square groove at the bottom of the upper pile is connected to the square tube of the lower pile. At this time, one side of the reinforcing plate on the lower pile contacts the outer wall of the upper pile, further limiting the position and enhancing the stability of the pile connection. The number of piles is selected according to specific needs. After driving, cement grout is injected from the top of the uppermost pile. The cement grout fills the entire interior of the pile and the gaps between piles, firmly bonding several piles into a whole, significantly improving the overall rigidity and deformation resistance of the pile. At the same time, the reinforcing plate is embedded in the foundation soil, increasing the contact area between the pile and the foundation, thereby increasing friction and effectively preventing the pile from floating or sinking under load. It has strong pull-out resistance and further ensures the effect of foundation reinforcement. The number of piles can be flexibly selected according to the actual bearing requirements and geological conditions of the foundation, adapting to foundation reinforcement projects with different depths and load requirements, and improving the applicability of precast piles.

[0007] Furthermore, two reinforcing plates are symmetrically arranged on the upper part of the outer wall of the pile body along the center line of the pile body.

[0008] By adopting the above technical solution, two reinforcing plates are installed, which facilitates the clamping device of the piling machinery to firmly clamp the pile from the sides where no reinforcing plates are installed, avoiding interference from the reinforcing plates on the clamping operation. In specific installation, the reinforcing plates on two adjacent piles are arranged alternately.

[0009] Furthermore, the bottom surface of the reinforcing plate is a first inclined surface, and the distance from the lower edge of the first inclined surface to the pile body is less than the distance from the upper edge to the pile body.

[0010] By adopting the above technical solution, the first inclined surface can play a good guiding and drag-reducing role when the pile is driven into the foundation.

[0011] Furthermore, four sets of clamping plates are circumferentially spaced on the lower part of the outer wall of the pile body. Each set of clamping plates includes two clamping plates spaced apart, and the distance between adjacent surfaces of the clamping plates is consistent with the thickness of the reinforcing plate.

[0012] By adopting the above technical solution, when the upper pile body is connected to the lower pile body, the clamping plate on the upper pile body can clamp the reinforcing plate on the lower pile body, making the connection between the pile bodies more firm and reliable.

[0013] Furthermore, the bottom surface of the clamping plate is a second inclined surface, and the distance from the lower edge of the second inclined surface to the pile body is less than the distance from the upper edge to the pile body.

[0014] By adopting the above technical solutions, the resistance when the piles are driven into the foundation is reduced.

[0015] Furthermore, the pile body has four sets of through holes in the circumferential direction, and each set of through holes includes two through holes arranged at intervals along the length of the pile body.

[0016] By adopting the above technical solution, when injecting cement grout, the cement grout not only fills the interior of the pile but also flows evenly into the soil around the pile through these through-holes. During the pile driving process, the reinforcing plate and clamp will scrape some grooves in the foundation. The cement grout flowing from the through-holes can precisely fill these grooves, allowing the cement grout to bond with the surrounding soil. After the cement grout solidifies in the soil, it firmly connects the pile to the surrounding soil, significantly improving the adhesion and friction between the pile and the foundation.

[0017] Furthermore, the through-hole on the upper side is arranged near the reinforcing plate.

[0018] By adopting the above technical solution, cement slurry can flow more directly into the grooves created by the reinforcing slab.

[0019] Furthermore, the inner wall of the pile body is provided with several annular grooves.

[0020] By adopting the above technical solution, after the cement grout enters the annular groove on the inner wall of the pile body and solidifies during grouting, the cement grout solidified in the annular groove forms an interlocking structure with the pile body, which greatly enhances the bonding strength between the cement grout and the inner wall of the pile body and avoids relative sliding between the two.

[0021] Furthermore, the drill bit includes a fixed tube fixedly disposed in a square groove, a square cement platform is disposed at the bottom of the fixed tube, and a square metal cone is disposed at the bottom of the square cement platform.

[0022] In summary, this utility model has the following beneficial effects: In this application, a pile body and a drill bit are provided. During pile driving, the pile body with the drill bit is driven into the foundation first. Then, the square groove at the bottom of the upper pile body is matched with the connecting square tube of the lower pile body. At this time, one side of the reinforcing plate on the lower pile body contacts the outer wall of the upper pile body, further limiting the position and enhancing the stability of the pile connection. The number of piles is selected according to specific requirements. After driving, cement grout is injected from the top of the uppermost pile body. The cement grout fills the entire interior of the pile body and the gaps between the piles, firmly combining several piles into a whole, significantly improving the overall rigidity and deformation resistance of the pile body. Simultaneously, the reinforcing plate is embedded in the foundation soil, increasing the contact area between the pile body and the foundation, thereby increasing friction and effectively preventing the pile body from floating or sinking under load. It has strong pull-out resistance, further ensuring the effect of foundation reinforcement. The number of piles can be flexibly selected according to the actual bearing capacity and geological conditions of the foundation, which can adapt to foundation reinforcement projects with different depths and load requirements, thus improving the applicability of precast piles. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the pile body according to an embodiment of the present invention; Figure 3 yes Figure 2 A sectional view; Figure 4 This is a schematic diagram of the drill bit structure according to an embodiment of the present invention.

[0024] In the diagram: 10. Pile body; 11. Connecting square pipe; 12. Square groove; 13. Reinforcing plate; 14. Clamping plate; 15. Through hole; 16. Annular groove; 20. Drill bit; 21. Fixing pipe; 22. Square-shaped cement platform; 23. Square-shaped metal cone. Detailed Implementation

[0025] 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.

[0026] like Figures 1-4 As shown in the illustration, this application discloses a precast concrete pile for foundation reinforcement, comprising a pile body 10, a connecting square pipe 11, and a reinforcing plate 13. The pile body 10 is generally square tubular, and there are multiple pile bodies 10, the number of which can be flexibly selected according to the actual bearing capacity requirements and geological conditions of the foundation. The connecting square pipe 11 is located at the upper end of the pile body 10. A square groove 12 is provided at the lower end of the pile body 10. The connecting square pipes 11 on two adjacent pile bodies 10 are inserted into the square groove 12, ensuring a stable connection and effectively preventing cement grout leakage from the connection point during subsequent grouting. A reinforcing plate 13 is provided on the upper part of the outer wall of the pile body 10, with the upper end of the reinforcing plate 13 flush with the connecting square pipe 11. A drill bit 20 is provided at the lower end of the lowest pile body 10. The drill bit 20 can significantly reduce the resistance during pile driving, allowing the pile body 10 to penetrate the surface and shallow soil more easily, thereby improving pile driving efficiency. During pile driving, the pile body 10 with drill bit 20 is driven into the foundation first. Then, the square groove 12 at the bottom of the upper pile body 10 is connected to the square tube 11 of the lower pile body 10. At this time, one side of the reinforcing plate 13 on the lower pile body 10 contacts the outer wall of the upper pile body 10, further limiting the position and enhancing the stability of the pile body 10 connection. The number of pile bodies 10 is selected according to the specific situation. After driving, cement grout is injected from the top of the uppermost pile body 10. The cement grout fills the entire interior of the pile body 10 and the gaps between the pile bodies 10, making several pile bodies 10 firmly bonded into a whole, significantly improving the overall rigidity and deformation resistance of the pile body 10. A reinforcing cage can be inserted in the middle of several pile bodies 10 to further enhance the strength after grouting. The reinforcing plate 13 is embedded in the foundation soil, increasing the contact area between the pile 10 and the foundation, thereby increasing the friction and effectively preventing the pile 10 from floating or sinking under load. It has strong pull-out resistance, further ensuring the effectiveness of foundation reinforcement. It can adapt to foundation reinforcement projects with different depths and load requirements, improving the applicability of precast piles.

[0027] Specifically, two reinforcing plates 13 are symmetrically arranged on the upper part of the outer wall of the pile body 10 along the center line of the pile body 10. This facilitates the clamping device of the pile driving machinery to firmly clamp the pile body 10 from the sides where the reinforcing plates 13 are not installed, avoiding interference from the clamping operation. In terms of structural stability, the two symmetrically arranged reinforcing plates 13 ensure that the pile body 10 is subjected to balanced forces in the horizontal direction, preventing the pile body 10 from being biased to one side due to uneven arrangement of the reinforcing plates 13. This enhances the symmetry of the friction between the pile body 10 and the foundation, further improving the overall stability of the pile body 10. During installation, the reinforcing plates 13 on adjacent pile bodies 10 are staggered. The staggered arrangement of the reinforcing plates 13 on adjacent pile bodies 10 creates staggered stress points in the foundation, significantly improving the interaction between the entire pile body 10 and the foundation soil, and enhancing the stability of the foundation. The bottom surface of the reinforcing plate 13 is a first inclined surface, and the distance from the lower edge of the first inclined surface to the pile 10 is less than the distance from the upper edge to the pile 10. When the pile 10 is driven into the foundation, the first inclined surface provides good guidance and drag reduction. As the pile 10 moves downward, the soil slides upward along the first inclined surface, preventing soil from accumulating at the bottom of the reinforcing plate 13 and creating significant resistance. This allows the pile 10 to enter the foundation more smoothly, reducing the power required for pile driving and saving construction energy.

[0028] Four sets of clamping plates 14 are circumferentially spaced on the lower part of the outer wall of the pile body 10. Each set of clamping plates 14 includes two clamping plates 14 spaced apart, and the distance between adjacent surfaces of the clamping plates 14 is the same as the thickness of the reinforcing plate 13. When the upper pile body 10 is connected to the lower pile body 10, the clamping plates 14 on the upper pile body 10 can clamp the reinforcing plate 13 on the lower pile body 10, making the connection between the pile bodies 10 more secure and reliable. At the same time, after the pile body 10 is driven into the foundation, the clamping plates 14 will embed into the surrounding soil, increasing the contact points and contact area between the pile body 10 and the foundation soil, significantly increasing the resistance of the pile body 10 in the horizontal and vertical directions, and better resisting the lateral compression of the foundation soil and the shear force brought by the upper load, further improving the stability of the entire pile body 10. The bottom surface of the clamping plate 14 is a second inclined surface, and the distance from the lower edge of the second inclined surface to the pile body 10 is less than the distance from the upper edge to the pile body 10. During the piling process, as the pile body 10 moves downward, the second inclined plane pushes the soil to both sides, allowing the soil to pass around the clamping plate 14 more smoothly. This avoids the soil forming a large accumulation resistance at the bottom of the clamping plate 14, thereby reducing the impact force required by the piling machinery, protecting the pile body 10 and the piling equipment, and also improving the speed and efficiency of piling.

[0029] The pile body 10 has four sets of through holes 15 circumferentially, each set including two through holes 15 spaced apart along the length of the pile body 10. During cement grout injection, the grout not only fills the interior of the pile body 10 but also flows evenly into the soil surrounding the pile body 10 through these through holes 15. Because the reinforcing plate 13 and clamping plate 14 create grooves in the foundation during pile driving, the cement grout flowing from the through holes 15 precisely fills these grooves, allowing the grout to bond with the surrounding soil. After the grout solidifies in the soil, it firmly connects the pile body 10 to the surrounding soil, significantly improving the adhesion and friction between the pile body 10 and the foundation. The upper through holes 15 are located near the reinforcing plate 13, allowing the cement grout to flow more directly into the grooves created by the reinforcing plate 13. Several annular grooves 16 are formed on the inner wall of the pile body 10. During grouting, the cement slurry enters the annular groove 16 on the inner wall of the pile body 10 and solidifies, forming an interlocking structure between the solidified cement slurry in the annular groove 16 and the pile body 10. This significantly enhances the bonding strength between the cement slurry and the inner wall of the pile body 10, preventing relative sliding between them. After the concrete is poured into the pile body 10, the interior of the pile body 10 is pressurized using a pressurizing tool such as an air compressor. During pressurization, the pressure discharge end of the pressurizing tool is sealed to the opening at the top of the pile body 10, allowing the poured concrete to be pressurized and discharged through the through hole 15, ensuring more thorough discharge. Finally, grouting is performed again to ensure that the grout is flush with the top of the pile body 10.

[0030] The drill bit 20 includes a fixed tube 21 fixedly installed within a square groove 12. A square-shaped cement platform 22 is located at the bottom of the fixed tube 21. The top surface of the square-shaped cement platform 22 has the same shape as the bottom surface of the pile body 10, but the bottom area of ​​the square-shaped cement platform 22 is smaller than its top area. A square-shaped metal cone 23 is located at the bottom of the square-shaped cement platform 22. The fixed tube 21, fixed within the square groove 12, ensures a secure connection between the drill bit 20 and the pile body 10, preventing separation during pile driving. The smaller bottom area of ​​the square-shaped cement platform 22 allows for easy penetration of the soil, reducing pile driving resistance. The square-shaped metal cone 23, made of high-strength metal, effectively handles hard strata or rocks encountered during pile driving. Simultaneously, the square-shaped structure provides uniform compression and cutting action on the soil during pile driving, allowing the pile body 10 to advance more smoothly downwards, improving pile driving efficiency and significantly reducing the difficulty of driving the lowest pile body 10 into the foundation.

[0031] In this embodiment, the working principle of a precast concrete pile for foundation reinforcement is as follows: When driving the pile, the lowest pile 10 with the drill bit 20 is driven into the foundation first, and the drill bit 20 easily penetrates the soil; then, according to the actual needs of the foundation, an appropriate number of upper piles 10 are selected, and the square groove 12 at the bottom of the upper pile is inserted and matched with the connecting square tube 11 at the upper end of the lower pile 10, so as to ensure that the reinforcing plate 13 of the lower pile 10 contacts the outer wall of the upper pile 10 to form a limit, and the reinforcing plates 13 of adjacent piles 10 are staggered. At the same time, the clamping plate 14 at the bottom of the upper pile 10 clamps the reinforcing plate 13 of the lower pile 10. After all piles 10 are installed, cement grout is injected from the top of the uppermost pile 10. A reinforcing cage can be inserted in the middle of the pile 10. The cement grout will fill the inside of the pile 10 and the gaps between the piles 10, enter the inner wall annular groove 16 to form an interlocking structure, and flow into the foundation through the circumferential through hole 15 to fill the grooves scraped out by the reinforcing plate 13 and the clamping plate 14. After the cement grout solidifies, the foundation reinforcement operation is completed.

[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A precast concrete pile for foundation reinforcement, characterized in that: The pile includes several square tube-shaped piles (10). The upper end of each pile (10) is provided with a connecting square tube (11) and the lower end is provided with a square groove (12). The connecting square tubes (11) on two adjacent piles (10) are inserted into the square grooves (12). A reinforcing plate (13) is provided on the upper part of the outer wall of the pile (10). The upper end of the reinforcing plate (13) is flush with the connecting square tube (11). A drill bit (20) is provided at the lower end of the lowest pile (10).

2. The precast concrete pile for foundation reinforcement according to claim 1, characterized in that: Two reinforcing plates (13) are symmetrically arranged on the upper part of the outer wall of the pile body (10) along the center line of the pile body (10).

3. A precast concrete pile for foundation reinforcement according to claim 2, characterized in that: The bottom surface of the reinforcing plate (13) is a first inclined surface, and the distance from the lower edge of the first inclined surface to the pile body (10) is less than the distance from the upper edge to the pile body (10).

4. A precast concrete pile for foundation reinforcement according to claim 3, characterized in that: The lower part of the outer wall of the pile (10) is provided with four sets of clamping plates (14) spaced apart in the circumferential direction. Each set of clamping plates (14) includes two clamping plates (14) spaced apart, and the distance between adjacent surfaces of the clamping plates (14) is consistent with the thickness of the reinforcing plate (13).

5. A precast concrete pile for foundation reinforcement according to claim 4, characterized in that: The bottom surface of the clamp (14) is a second inclined surface, and the distance from the lower edge of the second inclined surface to the pile body (10) is less than the distance from the upper edge to the pile body (10).

6. A precast concrete pile for foundation reinforcement according to claim 1, characterized in that: The pile body (10) has four sets of through holes (15) circumferentially, and each set of through holes (15) includes two through holes (15) spaced apart along the length of the pile body (10).

7. A precast concrete pile for foundation reinforcement according to claim 6, characterized in that: The through hole (15) on the upper side is arranged near the reinforcing plate (13).

8. A precast concrete pile for foundation reinforcement according to claim 1, characterized in that: The inner wall of the pile body (10) is provided with several annular grooves (16).

9. A precast concrete pile for foundation reinforcement according to claim 1, characterized in that: The drill bit (20) includes a fixed tube (21) fixedly installed in a square groove (12), and a square cement platform (22) is provided at the bottom of the fixed tube (21), and a square metal cone (23) is provided at the bottom of the square cement platform (22).

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