Special-shaped precast pile
By setting concave zones and spiral reinforcement zones on the precast pile body, the problem of pile damage during hammer driving is solved, achieving efficient construction and strength improvement, and meeting the load-bearing requirements of high-rise buildings.
Patent Information
- Application Number
- CN202520528191.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Existing precast concrete piles are easily damaged by the impact of soil and gravel during the hammer driving process, resulting in pile damage and making it difficult to meet the load-bearing requirements of high-rise buildings.
Design an irregular precast pile with multiple concave zones and spiral reinforcement zones on the pile body. The concave zones are used to guide the pile body to sink and reduce the impact damage of soil and gravel on the pile body, while the spiral reinforcement zones improve the stiffness at both ends of the pile body.
It improves the positional accuracy and construction efficiency of the pile, reduces pile damage, extends service life, and enhances pile strength.
Smart Images
Figure CN223937133U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precast pile technology, specifically to an irregularly shaped precast pile. Background Technology
[0002] As modern buildings develop towards higher heights, larger scales, and more complex functions, the self-weight of buildings and the live loads they bear have increased significantly. Natural foundations can no longer fully meet the load-bearing requirements of the superstructure. Under these circumstances, concrete piles have emerged as foundation piles.
[0003] The hammer-driven pile driving method is commonly used in the construction of precast concrete piles. The principle of hammer-driven pile driving is to utilize the impact mechanical energy generated by the falling hammer to overcome the resistance of the soil against the pile, thus disrupting the pile's original static equilibrium and causing it to sink until a new static pressure equilibrium is achieved. Through continuous hammering of the pile head, the pile continues to penetrate deeper. However, during repeated hammering, the impact between the precast pile and the soil and gravel can damage the pile itself.
[0004] Therefore, it is necessary to propose an irregularly shaped precast pile to at least partially solve the problems existing in the prior art. Utility Model Content
[0005] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.
[0006] To address the aforementioned problems, this utility model discloses an irregularly shaped precast pile; it includes:
[0007] The pile body includes a steel reinforcement cage and high-strength concrete poured with the steel reinforcement cage. The steel reinforcement cage includes longitudinal reinforcement bars and spiral stirrups. Several longitudinal reinforcement bars are set vertically and are evenly arranged around the outline of the pile body. The spiral stirrups are connected to the outside of the longitudinal reinforcement bars. Multiple concave areas are provided on the pile body.
[0008] Preferably, the concave area of the pile body includes multiple concave short sections connected end to end. Each concave short section includes a first concave section, a second concave section, and a transition section. The cross-sectional dimension of the second concave section is larger than that of the first concave section. The transition section connects the first and second concave sections. The first concave section is located near the bottom end of the pile body.
[0009] Preferably, the lengths of the first concave segment, the second concave segment, and the transition segment are equal.
[0010] Preferably, multiple concave zones are spaced apart on the pile body, and the length of each concave zone is equal to the length of the pile body between adjacent concave zones.
[0011] Preferably, a spiral reinforcement zone is set at both ends of the pile body, and the spiral stirrups in the spiral reinforcement zone are densely arranged. The axial spacing of the spiral stirrups in the spiral reinforcement zone is smaller than the axial spacing of the spiral stirrups at other locations on the pile body.
[0012] Preferably, the length of the spiral reinforcement zone on the pile body is greater than the length of the concave zone on the pile body.
[0013] Preferably, the pile body is set as either a solid pile or a hollow pile.
[0014] Preferably, when the pile body is set as a hollow pile, the inner walls of the first concave section, the second concave section and the transition section are flush.
[0015] Preferably, when the pile body is set as a hollow pile, the effective wall thickness of the pile body is the wall thickness at the first concave section, and the effective wall thickness is not less than 20mm.
[0016] Preferably, the pile cross-section is set to either circular or square.
[0017] Compared with the prior art, the present invention has at least the following beneficial effects:
[0018] This utility model provides an irregularly shaped precast pile with multiple concave zones on the pile body, which are spaced apart from the pile body. On the one hand, the concave zones can guide the sinking process of the pile body during the precast pile construction, improve the positional accuracy of the pile body, and reduce the difficulty of pile driving construction. On the other hand, during the hammering construction, soil and gravel enter the gaps in the concave zones of the pile body, reducing the impact damage to the pile body, protecting the concrete at the connection between the pile body and the concave zones, improving the strength of the precast pile, and extending its service life.
[0019] The present invention relates to an irregularly shaped precast pile. Other advantages, objectives and features of the present invention will be partly apparent from the following description, and partly understood by those skilled in the art through research and practice of the present invention. Attached Figure Description
[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the concave area of the pile body in this utility model;
[0023] Figure 3 This is a partial cross-sectional structural diagram of the pile body in this utility model;
[0024] Figure 4 This is a top view of the pile body in this utility model;
[0025] Among them, (a) the central pile is a solid square pile, (b) the central pile is a hollow square pile, (c) the central pile is a solid round pile, and (d) the central pile is a hollow round pile.
[0026] Figure 5 This is a top view of the pile body at the spiral stirrups in this utility model;
[0027] Among them, (e) is a solid square pile, (f) is a hollow square pile, (g) is a solid round pile, and (h) is a hollow round pile.
[0028] Figure 6 This is a schematic diagram of the structure of the concave area of the Chinese pile in this utility model;
[0029] Figure 7 This is a schematic diagram of the concave area of the circular pile in this utility model.
[0030] In the diagram: 1. Pile body; 2. Pile longitudinal reinforcement; 3. Spiral stirrups; 4. Concave area of pile body; 5. First concave section; 6. Second concave section; 7. Transition section; 8. Spiral reinforcement zone. Detailed Implementation
[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0032] Example
[0033] The present invention will now be further described with reference to the accompanying drawings.
[0034] like Figures 1-7 As shown, this embodiment provides an irregularly shaped precast pile, comprising:
[0035] The pile body 1 includes a steel reinforcement cage and high-strength concrete poured with the steel reinforcement cage. The steel reinforcement cage includes longitudinal reinforcement bars 2 and spiral stirrups 3. Several longitudinal reinforcement bars 2 are vertically arranged and evenly distributed around the outline of the pile body 1. The spiral stirrups 3 are connected to the outside of the longitudinal reinforcement bars 2. Multiple concave areas 4 are provided on the pile body 1.
[0036] The working principle and beneficial effects of this utility model are as follows:
[0037] This embodiment provides an irregularly shaped precast pile. The pile body 1 is formed by precast steel reinforcement skeleton and high-strength concrete poured on the steel reinforcement skeleton. The steel reinforcement skeleton serves as the supporting structure of the pile body 1 and is formed by a combination of vertically arranged longitudinal reinforcement 2 and horizontally arranged spiral stirrups 3, providing sufficient rigidity for the pile body 1 as a whole. Multiple concave areas 4 are set on the pile body 1, and the concave areas 4 are arranged at intervals from the pile body 1. On the one hand, the concave areas 4 can guide the sinking process of the pile body 1 during the construction of the precast pile, improve the positional accuracy of the pile body 1, and reduce the difficulty of pile driving construction. On the other hand, during the hammering construction, soil and gravel enter the gaps in the concave areas 4, reducing the impact damage to the pile body 1, protecting the concrete at the connection between the pile body 1 and the concave areas 4, improving the strength of the precast pile, and extending its service life.
[0038] In one embodiment, the concave area 4 of the pile body includes a plurality of concave short sections connected end to end. The concave short sections include a first concave section 5, a second concave section 6 and a transition section 7. The cross-sectional dimension of the second concave section 6 is larger than that of the first concave section 5. The transition section 7 connects the first concave section 5 and the second concave section 6. The first concave section 5 is located near the bottom end of the pile body 1.
[0039] The working principle and beneficial effects of the above technical solution are as follows:
[0040] The concave section 4 of the pile body includes multiple concave short sections connected end to end. The first concave section 5 and the second concave section 6 of the concave short sections have different cross-sectional dimensions and are connected by a transition section 7 to form a conical structure with a lower diameter smaller than the upper diameter. The combination of multiple concave short sections forms a multi-segment propulsion structure, which helps the precast pile sink into the underground soil.
[0041] Among them, the lengths L1 of the first concave segment 5, L3 of the second concave segment 6, and L2 of the transition segment 7 are equal, so that the force is uniform at each position of the concave short section.
[0042] Multiple concave zones 4 are spaced apart on the pile body 1, and the length of the concave zone 4 is equal to the length of the pile body 1 between adjacent concave zones 4; this ensures that the concave zone 4 has sufficient length to achieve its guiding and assisting propulsion effects.
[0043] In one embodiment, a spiral reinforcement zone 8 is provided at both ends of the pile body 1, and the spiral reinforcement 3 in the spiral reinforcement zone 8 is densely arranged. The axial spacing of the spiral reinforcement 3 in the spiral reinforcement zone 8 is smaller than the axial spacing of the spiral reinforcement 3 at other positions of the pile body 1.
[0044] The length of the spiral reinforcement zone 8 on pile body 1 is greater than the length of the concave zone 4 on pile body 1.
[0045] The working principle and beneficial effects of the above technical solution are as follows:
[0046] Spiral reinforcement zones 8 are set at both ends of the pile body 1, that is, denser spiral hoops 3 are set at the upper and lower ends of the pile body 1 to improve the rigidity of the upper and lower ends of the pile body 1, reduce the damage caused by the bottom of the pile body 1 when it impacts the soil and gravel, and reduce the damage caused by the top of the pile body 1 when it is hammered.
[0047] In one embodiment, the pile body 1 is set as either a solid pile or a hollow pile, taking into account various factors such as the type of building structure, the magnitude of the load, geological conditions, construction conditions, and cost.
[0048] When the pile body 1 is set as a hollow pile, the inner walls of the first concave section 5, the second concave section 6 and the transition section 7 are flush.
[0049] When the pile body 1 is set as a hollow pile, the effective wall thickness of the pile body 1 is the wall thickness t at the first concave section 5, and the effective wall thickness t is not less than 20mm, so as to ensure that the concave area 4 of the pile body has sufficient rigidity.
[0050] In one embodiment, based on a comprehensive consideration of factors such as specific engineering geological conditions, superstructure load characteristics, construction technology level, and economic costs, a precast pile of a suitable shape is selected, and the cross-section of the pile body 1 is set to either a circle or a square.
[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A precast pile of irregular shape, characterized in that, include: The pile body (1) includes a steel reinforcement cage and high-strength concrete poured with the steel reinforcement cage; the steel reinforcement cage includes longitudinal reinforcement (2) and spiral stirrups (3); several longitudinal reinforcement (2) are set vertically and are evenly arranged around the outline of the pile body (1); the spiral stirrups (3) are connected around the outside of the longitudinal reinforcement (2); multiple concave areas (4) are provided on the pile body (1).
2. The irregularly shaped precast pile according to claim 1, characterized in that, The concave area (4) of the pile body includes multiple concave short sections connected end to end. The concave short sections include a first concave section (5), a second concave section (6), and a transition section (7). The cross-sectional dimension of the second concave section (6) is larger than that of the first concave section (5). The transition section (7) is connected between the first concave section (5) and the second concave section (6). The first concave section (5) is set near the bottom end of the pile body (1).
3. The irregularly shaped precast pile according to claim 2, characterized in that, The lengths of the first concave segment (5), the second concave segment (6), and the transition segment (7) are equal.
4. The irregularly shaped precast pile according to claim 1, characterized in that, Multiple concave areas (4) are spaced apart on the pile body (1), and the length of the concave area (4) is equal to the length of the pile body (1) between adjacent concave areas (4).
5. The irregularly shaped precast pile according to claim 1, characterized in that, Spiral reinforcement zones (8) are set at both ends of the pile body (1). Spiral reinforcement bars (3) are reinforced in the spiral reinforcement zones (8). The axial spacing of the spiral reinforcement bars (3) in the spiral reinforcement zones (8) is smaller than the axial spacing of the spiral reinforcement bars (3) at other locations on the pile body (1).
6. The irregularly shaped precast pile according to claim 5, characterized in that, The length of the spiral densification zone (8) on the pile body (1) is greater than the length of the concave zone (4) in the pile body.
7. A precast irregular pile according to claim 2, characterized in that, The pile body (1) is set to either a solid pile or a hollow pile.
8. A precast irregular pile according to claim 7, characterized in that, When the pile body (1) is set as a hollow pile, the inner walls of the first concave section (5), the second concave section (6) and the transition section (7) are flush.
9. A precast irregular pile according to claim 8, characterized in that, When the pile body (1) is set as a hollow pile, the effective wall thickness of the pile body (1) is the wall thickness at the first concave section (5), and the effective wall thickness is not less than 20mm.
10. A precast irregular pile according to claim 1, characterized in that, The cross section of the pile body (1) is set to either a circle or a square.