A compression pile tip structure

Abstract

The utility model relates to pile foundation engineering technical field especially discloses a kind of anti-pressure pile tip structure, including pile body, first pointed part and second pointed part being located at the end of the pile body, the plane where the first pointed part is located and the plane where the second pointed part is located are crossed and set;Along the central axis direction of pile body, the most remote end of the first pointed part exceeds the most remote end of the second pointed part, and both form stepped earth-penetrating structure.The plane crossing of first pointed part and second pointed part and the formation stepped earth-penetrating structure can reduce earth-penetrating resistance and improve earth-penetrating efficiency;The stepped structure makes the stress more uniform when the pile body enters the earth, can enhance the stability and pullout resistance of the pile body, can also adapt to complex geological conditions, improve construction quality and efficiency, and guarantee the safety and reliability of the anti-pressure pile top structure.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation engineering technology, and in particular discloses a pile tip structure for compression piles. Background Technology

[0002] In the field of building construction, pile foundations, as a crucial load-bearing structure, directly impact the safety and stability of buildings. Traditional compression pile tip structures often employ a single-tip design, facing challenges such as high resistance and low efficiency during soil insertion. In complex geological conditions, such as dense soil or gravelly soil layers, rapid and accurate insertion is difficult, and pile tilting can easily occur, affecting verticality and positioning accuracy. Regarding load-bearing capacity, conventional structures cannot effectively distribute loads, easily leading to stress concentration. The interlocking and anchoring effect between the pile and the soil is poor, resulting in limited compressive and lateral deformation resistance, failing to meet the diverse load requirements of modern buildings. Furthermore, traditional pile structures are difficult and costly to construct, their significant weight increases soil insertion resistance, and the connection methods with the superstructure are not convenient or efficient enough, affecting construction efficiency and overall structural reliability. Therefore, there is an urgent need to develop a compression pile tip structure that is efficient in soil insertion, has superior load-bearing performance, and is easy to construct. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a pile tip structure for compression piles.

[0004] To achieve the above objectives, the present invention provides a pile tip structure for a compression pile, comprising a pile body, a first tip and a second tip disposed at the end of the pile body, wherein the plane of the first tip and the plane of the second tip are intersected; along the central axis of the pile body, the farthest end of the first tip extends beyond the farthest end of the second tip, and the two form a stepped soil-entry structure.

[0005] Furthermore, the plane containing the first tip is perpendicular to the plane containing the second tip, and the pile body forms a straight cross-section structure at the first tip and a cross-shaped cross-section structure at the second tip.

[0006] Furthermore, the tip includes a pointed surface for cutting into the soil structure, and two blades are respectively provided on both sides of the pointed surface to transition and connect with the pointed surface. The two blades are used to assist the pointed surface in cutting the soil structure. The pointed surface and the two blades form a trapezoidal cross-section structure in a plane perpendicular to the pile axis, and the blades extend obliquely from the outside of the pile towards the central axis to the pointed surface.

[0007] Furthermore, the pile body is provided with a rigid pressure plate, and the first tip and the second tip are both fixed to the rigid pressure plate.

[0008] Furthermore, the angle between the cutting edge and the pointed edge is between 45° and 60°.

[0009] Furthermore, the pile body has a cylindrical structure, and multiple annular grooves are provided near the tip of the pile body.

[0010] Furthermore, the pile body includes reinforced concrete, which has a hollow structure, and a reinforcing cage is provided inside the hollow structure. The gap between the reinforcing cage and the reinforced concrete is filled with a concrete layer.

[0011] Furthermore, the reinforcing cage includes longitudinal bars arranged parallel to the central axis of the pile and stirrups connected to the longitudinal bars; multiple longitudinal bars and stirrups are provided, and the multiple longitudinal bars are arranged around the central axis of the pile; the plane where the stirrups are located is perpendicular to the central axis of the pile, and the multiple stirrups are arranged along the length direction of the longitudinal bars.

[0012] Furthermore, a hollow layer is provided between the steel cage and the tip, the hollow layer being surrounded by the steel reinforced concrete, and a rigid layer is provided at the ends of the steel cage and the tip that are opposite to each other.

[0013] Furthermore, the end of the pile body away from the tip is provided with a connecting part for connecting with the pile cap or other superstructure, and the connecting part is a steel reinforcement structure of the steel cage protruding from the pile body.

[0014] The beneficial effects of this utility model are:

[0015] (1) High efficiency in soil penetration and adaptability to complex geology: The stepped soil penetration structure is combined with the first and second tips set in a cross pattern. The first tip first breaks the soil structure, and the second tip follows suit, which greatly reduces the soil penetration resistance. Whether it is loose soil or dense soil, it can quickly cut in, significantly improve soil penetration efficiency, and shorten the construction cycle. At the same time, the structure effectively maintains the stability of the pile body in the soil, accurately controls the verticality and positioning accuracy, and lays a solid foundation for the building foundation.

[0016] (2) Optimize load bearing and enhance structural stability: The unique pointed shape design (the pointed surface and the blade surface form a trapezoidal cross section) and reasonable structural layout (vertical setting of pointed parts with different cross sections, annular grooves, steel cage construction, etc.) can not only efficiently break up the soil and expand the soil entry channel, but also evenly distribute the load and avoid stress concentration; by enhancing the interlocking, friction and anchoring effect between the pile body and the soil, the pile body’s compressive strength and lateral deformation resistance are significantly improved, ensuring that the pile foundation can stably bear load under various load conditions and extending the service life of the building.

[0017] (3) Facilitates construction and ensures overall performance: The rigid pressure plate firmly connects the tip components, ensuring uniform load transfer and improving construction guidance; the hollow structure reduces the self-weight of the pile, reduces construction difficulty and cost, and reduces soil squeezing effect; the connection part formed by the protrusion of the steel cage facilitates a firm connection with the upper structure, constructs an overall stress system, simplifies the construction process, improves construction efficiency, and ensures the reliability and stability of the pile and the overall building structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a compression pile tip structure according to the present invention;

[0019] Figure 2 This is a schematic diagram of the pile top structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the first structure of the pile body of this utility model;

[0021] Figure 4 This is a schematic diagram of the second structure of the pile body of this utility model.

[0022] The reference numerals in the attached drawings include: 1. Pile body; 2. First tip; 3. Second tip; 4. Tip; 5. Cutting edge; 6. Rigid pressure plate; 7. Annular groove; 8. Reinforced concrete; 9. Reinforcing cage; 11. Concrete layer; 12. Longitudinal reinforcement; 13. Stirrup; 14. Hollow layer; 15. Rigid layer; 16. Connection part. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] Please see Figures 1 to 4 As shown, the present invention provides a pile tip structure for a compression pile, including a pile body 1, a first tip 2 and a second tip 3 disposed at the end of the pile body 1, wherein the plane of the first tip 2 and the plane of the second tip 3 are intersected; along the axial direction of the pile body 1, the farthest end of the first tip 2 extends beyond the farthest end of the second tip 3, and the two form a stepped soil-entry structure.

[0025] In practical use, the stepped entry structure significantly reduces the resistance encountered by pile 1 during soil insertion. Compared to the traditional single-point pile tip structure, the first tip 2 enters the soil first, acting as a pioneer, disrupting the original soil structure and facilitating the smoother insertion of the second tip 3. When facing different geological conditions, whether in relatively loose soil layers or soil with a certain degree of compaction, the stepped structure can more effectively penetrate the soil, significantly improving the soil insertion efficiency of pile 1 and shortening the construction cycle. Furthermore, the intersecting tip structure allows pile 1 to maintain better stability during insertion, preventing tilting due to uneven stress, ensuring the verticality and positioning accuracy of pile 1, thus laying a solid foundation for the stability of the entire building structure and improving the safety and durability of the building.

[0026] Specifically, the plane where the first tip 2 is located is perpendicular to the plane where the second tip 3 is located. The pile body forms a straight cross-section structure at the first tip 2 and a cross-section structure at the second tip 3.

[0027] In practical use, the first pointed portion 2 with a straight cross-section has excellent guiding properties, accurately breaking through the soil, reducing lateral resistance, and providing clear directional guidance for the pile 1 to enter the soil. The second pointed portion 3 with a cross-shaped cross-section, after opening a channel with the first pointed portion 2, allows its protruding parts in four directions to more effectively compress and break up the surrounding soil, enhancing the interlocking between the pile 1 and the soil. When bearing loads, this unique structural distribution allows the pile 1 to evenly transfer pressure to the surrounding soil, avoiding stress concentration. Whether under vertical or horizontal loads, the vertically arranged pointed structure with different cross-sections can fully utilize its mechanical properties, improving the pile 1's resistance to compressive and lateral deformation, enhancing the overall load-bearing capacity of the pile foundation, ensuring the stability of the building under various working conditions, and effectively extending the building's service life.

[0028] Specifically, the tip includes a pointed surface 4 for cutting into the soil structure, and two blade surfaces 5 are respectively provided on both sides of the pointed surface 4 and are connected to the pointed surface 4. The two blade surfaces 5 are used to assist the pointed surface 4 in cutting the soil structure. The pointed surface 4 and the two blade surfaces 5 form a trapezoidal cross-section structure in a plane perpendicular to the axis of the pile body 1, and the blade surfaces 5 extend obliquely from the outside of the pile body 1 towards the central axis to the pointed surface 4.

[0029] In practical use, the pointed face 4, as the main cutting component, can quickly pierce the soil surface with its sharp shape, reducing the resistance to penetration. The two side blades 5, like sharp knives, assist the pointed face 4 in cutting the soil structure after penetration, further expanding the penetration channel. When facing relatively hard soil or geological conditions containing obstacles such as small amounts of gravel, the presence of the blades 5 can effectively break these obstacles, allowing the pile 1 to penetrate smoothly. The trapezoidal cross-section structure ensures that the soil's reaction force is evenly distributed during penetration, preventing excessive local stress that could damage the pointed face. Simultaneously, this structure also helps increase the friction between the pile 1 and the soil, enhancing the anchoring effect of the pile 1. This allows the pile 1 to more stably transfer force to the soil when under load, improving its bearing capacity and stability, and ensuring the solidity and reliability of the building foundation.

[0030] Specifically, the pile body 1 is provided with a rigid pressure plate 6, and the first tip 2 and the second tip 3 are both fixed to the rigid pressure plate 6.

[0031] In practical use, the rigid pressure plate 6 possesses high strength and rigidity, effectively and evenly transferring the load borne by the pile 1 to the first tip 2 and the second tip 3, preventing damage or deformation of the tips due to excessive local stress. During the pile 1's insertion into the soil, the rigid pressure plate 6 provides guidance and support, maintaining the tips in a stable posture and reducing the risk of pile 1 tilting. When bearing loads transferred from the superstructure, the rigid pressure plate 6 coordinates the first tip 2 and the second tip 3, fully utilizing their bearing capacity and improving the compressive strength of the pile 1. Furthermore, the presence of the rigid pressure plate 6 facilitates the connection and fixation of the tips to other parts of the pile 1, enhancing the overall integrity of the pile structure and ensuring reliable operation of the pile 1 under complex geological conditions and load conditions, providing solid foundation support for the building.

[0032] Specifically, the angle between the cutting edge 5 and the pointed edge 4 is between 45° and 60°.

[0033] In practical use, when the included angle is within this range, the cutting edge 5 can assist the pointed edge 4 in cutting the soil at the optimal angle. If the angle is too small, the cutting effect of the cutting edge 5 is not obvious and cannot fully play its auxiliary role; if the angle is too large, it will increase the resistance to soil penetration and reduce the soil penetration efficiency of the pile 1. Within the included angle range of 45°-60°, the cutting edge 5 can effectively squeeze and break the soil to both sides, reducing the resistance of the soil to the pile 1, allowing the pile 1 to penetrate the soil more smoothly. At the same time, this angle range is also conducive to maintaining the strength and durability of the cutting edge 5, avoiding damage to the cutting edge 5 due to excessive force during soil cutting. When bearing load, a reasonable included angle setting can form a good interlocking and frictional relationship between the pile 1 and the soil, improving the bearing capacity and stability of the pile 1, ensuring that the pile foundation can work reliably during long-term use, and ensuring the safety of the building.

[0034] Specifically, the pile body 1 has a cylindrical structure, and multiple annular grooves 7 are provided near the tip of the pile body 1.

[0035] In practical use, the annular groove 7 increases the surface roughness of the pile 1. After the pile 1 is driven into the soil, the soil fills the groove, forming a tenon-and-mortise-and-tenon-like interlocking relationship, which greatly enhances the friction and adhesion between the pile 1 and the soil. Under vertical loads, this enhanced friction and adhesion can effectively transfer the load to the surrounding soil, improving the bearing capacity of the pile 1. Under horizontal loads, the annular groove 7 can also provide a certain shear resistance, reducing the lateral displacement of the pile 1 and enhancing its stability. In addition, the annular groove 7 can also alleviate the soil squeezing effect during the pile 1's drive into the soil to a certain extent, reducing disturbance to the surrounding soil, reducing the impact of construction on the surrounding environment, and helping to protect the safety of surrounding buildings and underground facilities, while also improving the convenience and efficiency of construction.

[0036] Specifically, the pile body 1 includes a reinforced concrete body 8, which has a hollow structure. A reinforcing cage 9 is provided inside the hollow structure, and the gap between the reinforcing cage 9 and the reinforced concrete body 8 is filled with a concrete layer 11.

[0037] In practical use, the reinforcing cage 9 provides the pile 1 with strong tensile and shear resistance, effectively resisting tensile and shear stresses caused by building loads, uneven foundation settlement, and other factors, preventing cracking and damage to the pile 1. The reinforced concrete 8 provides good compressive strength. Together, they enable the pile 1 to withstand complex load conditions. The hollow structure reduces the self-weight of the pile 1 without reducing its bearing capacity, thus lowering construction difficulty and cost. Simultaneously, the hollow structure also helps reduce resistance during pile insertion, improving insertion efficiency. The filled concrete layer 11 further enhances the synergistic working ability between the reinforcing cage 9 and the reinforced concrete 8, making the entire pile 1 a solid whole, improving its durability and reliability, and ensuring that the pile foundation can stably support the building for a long period.

[0038] Specifically, the reinforcing cage 9 includes longitudinal bars 12 arranged parallel to the central axis of the pile body 1 and stirrups 13 connected to the longitudinal bars 12; multiple longitudinal bars 12 and stirrups 13 are provided, and the multiple longitudinal bars 12 are arranged around the central axis of the pile body 1; the plane where the stirrups 13 are located is perpendicular to the central axis of the pile body 1, and the multiple stirrups 13 are arranged along the length direction of the longitudinal bars 12.

[0039] In practical use, the longitudinal reinforcement 12 mainly bears the tensile force and part of the compressive force on the pile 1. The even distribution of multiple longitudinal reinforcements 12 allows the pile 1 to transfer the load more evenly when under stress, avoiding local stress concentration. The stirrups 13 serve to restrain the longitudinal reinforcement 12 and enhance the overall integrity of the steel cage 9, preventing the longitudinal reinforcement 12 from buckling and displacing during the stress process. When the pile 1 is under load, the longitudinal reinforcement 12 and stirrups 13 work together to form a stable spatial skeleton structure, effectively improving the load-bearing capacity and deformation resistance of the pile 1. Whether bearing vertical loads, horizontal loads, or torsional loads, this steel cage 9 structure can fully utilize its mechanical properties, ensuring the stability and reliability of the pile 1. At the same time, the reasonable arrangement of the longitudinal reinforcement 12 and stirrups 13 also facilitates the binding and installation of steel bars during construction, improving construction efficiency and ensuring construction quality.

[0040] Specifically, a hollow layer 14 is provided between the steel cage 9 and the tip, the hollow layer 14 is surrounded by the steel reinforced concrete 8, and a rigid layer 15 is provided at the ends of the steel cage 9 and the tip that are opposite to each other.

[0041] In practical use, the hollow layer 14 reduces the weight of the lower part of the pile 1, lowers the resistance when the pile 1 is driven into the soil, and makes it easier to drive the pile 1 to the designed depth, improving construction efficiency. At the same time, the hollow layer 14 also helps to reduce the compression of the surrounding soil by the pile 1 during the driving process, reducing the soil squeezing effect and protecting the surrounding environment. The rigid layer 15 at the end enhances the strength and rigidity of the connection 16 between the reinforcing cage 9 and the tip, enabling the pile 1 to more effectively transfer force from the tip to the reinforcing cage 9 when under load, and then through the reinforcing cage 9 to the entire pile 1 and the foundation. The rigid layer 15 prevents stress concentration and localized damage at the connection 16, improving the overall integrity and reliability of the pile 1 structure, ensuring the stable operation of the pile foundation during long-term use, and providing reliable foundation support for the building.

[0042] Specifically, the end of the pile body 1 away from the tip is provided with a connecting part 16 for connecting with the pile cap or other superstructure. The connecting part 16 is a steel reinforcement structure of the steel cage 9 protruding from the pile body 1.

[0043] In practical use, the protruding reinforcing bars of the steel cage 9 can be firmly connected to the reinforcing bars in the pile cap or superstructure through welding, tying, or other methods, forming an integrated load-bearing system. When the building is under load, the connection part 16 can effectively transfer the load of the superstructure to the pile body 1, and then to the foundation through the pile body 1. This connection method has high strength and reliability, and can withstand large tensile, compressive, and shear forces, ensuring the coordinated work between the pile foundation and the superstructure. At the same time, the protruding reinforcing bar structure of the steel cage 9 also facilitates connection operations during construction, improves construction efficiency, ensures construction quality, enables the entire building structure to operate stably and reliably, and extends the service life of the building.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pile tip structure for a compression pile, characterized in that: It includes a pile body (1), a first tip (2) and a second tip (3) located at the end of the pile body (1), the plane of the first tip (2) and the plane of the second tip (3) are intersected; along the central axis of the pile body (1), the farthest end of the first tip (2) extends beyond the farthest end of the second tip (3), and the two form a stepped soil-entry structure.

2. The pile tip structure of a compression pile according to claim 1, characterized in that: The plane where the first tip (2) is located is perpendicular to the plane where the second tip (3) is located. The pile body (1) forms a straight cross-section structure at the first tip (2) and a cross-section structure at the second tip (3).

3. The pile tip structure of a compression pile according to claim 1 or 2, characterized in that: The tip includes a pointed surface (4) for cutting into the soil structure. The pointed surface (4) has two blades (5) on its sides that are connected to the pointed surface (4). The two blades (5) are used to assist the pointed surface (4) in cutting the soil structure. The pointed surface (4) and the two blades (5) form a trapezoidal cross-section structure in a plane perpendicular to the axis of the pile body (1). The blades (5) extend obliquely from the outside of the pile body (1) toward the central axis to the pointed surface (4).

4. The pile tip structure of a compression pile according to claim 1, characterized in that: The pile body (1) is provided with a rigid pressure plate (6), and the first tip (2) and the second tip (3) are both fixed to the rigid pressure plate (6).

5. The pile tip structure of a compression pile according to claim 3, characterized in that: The angle between the cutting edge (5) and the pointed edge (4) is between 45° and 60°.

6. The pile tip structure of a compression pile according to claim 1, characterized in that: The pile body (1) has a cylindrical structure, and multiple annular grooves (7) are provided near the tip of the pile body (1).

7. The pile tip structure of a compression pile according to claim 1, characterized in that: The pile body (1) includes a reinforced concrete body (8), which has a hollow structure. A steel cage (9) is provided inside the hollow structure, and the gap between the steel cage (9) and the reinforced concrete body (8) is filled with a concrete layer (11).

8. The pile tip structure of a compression pile according to claim 7, characterized in that: The steel cage (9) includes longitudinal bars (12) arranged parallel to the central axis of the pile body (1) and stirrups (13) connected to the longitudinal bars (12); both the longitudinal bars (12) and the stirrups (13) are provided in multiples, and the multiple longitudinal bars (12) are arranged around the central axis of the pile body (1); the plane where the stirrups (13) are located is perpendicular to the central axis of the pile body (1), and the multiple stirrups (13) are arranged along the length direction of the longitudinal bars (12).

9. The pile tip structure of a compression pile according to claim 7, characterized in that: A hollow layer (14) is provided between the steel cage (9) and the tip, the hollow layer (14) is surrounded by the steel reinforced concrete (8), and a rigid layer (15) is provided at the ends of the steel cage (9) and the tip respectively.

10. The pile tip structure of a compression pile according to claim 7, characterized in that: The end of the pile body (1) away from the tip is provided with a connecting part (16) for connecting with the pile cap or other superstructure. The connecting part (16) is a steel reinforcement structure of the steel cage (9) protruding from the pile body (1).

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