A high-strength precast square pile

Abstract

This utility model provides a high-strength precast square pile, comprising a concrete pile body, wherein: one end of the concrete pile body is provided with an integral conical pile head, the concrete pile body is filled with a reinforcing cage and a main reinforcing structure, the reinforcing structure is fixedly installed inside the reinforcing cage, the conical pile head is filled with a secondary reinforcing structure, and the secondary reinforcing structure is fixedly connected to the reinforcing cage and the main reinforcing structure; the overall structure of this utility model not only improves the bonding strength between the concrete and the reinforcing cage, but also ensures the strength at the center of the concrete pile body, thereby making the whole structure safer and more reliable during use.

Description

Technical Field

[0001] This utility model relates to the field of construction, and in particular to a high-strength precast square pile. Background Technology

[0002] Precast square piles are a type of pile that is prefabricated in a factory or on a construction site and then driven or pressed into the soil using pile driving equipment. They are mainly used to bear vertical loads.

[0003] However, existing precast square piles have limited bonding strength with concrete due to the hollow structure of the steel reinforcement cage, especially at the center of the pile.

[0004] Therefore, it is essential to invent a high-strength precast square pile. Utility Model Content

[0005] To solve the above-mentioned technical problems, the present invention provides a high-strength precast square pile with the following technical solution: a high-strength precast square pile, comprising a concrete pile body, wherein: one end of the concrete pile body is provided with an integral conical pile head, the concrete pile body is filled with a steel cage and a main reinforcing structure, the reinforcing structure is fixedly installed inside the steel cage, the conical pile head is filled with a secondary reinforcing structure, and the secondary reinforcing structure is fixedly connected to the steel cage and the main reinforcing structure; The main reinforcing structure includes a hollow column, a first reinforcing rib, and a second reinforcing rib. Several first reinforcing ribs and second reinforcing ribs are uniformly fixedly installed on the hollow column. The first reinforcing ribs and second reinforcing ribs are arranged in a cross shape and stacked sequentially. The hollow column, the first reinforcing rib, and the second reinforcing rib are all fixedly connected to the steel cage. The hollow column is fixedly connected to the secondary reinforcing structure.

[0006] The steel cage includes main bars, stirrups, end plates, and tail plates. Several main bars are uniformly fixed between the end plates and the tail plates. Several stirrups are uniformly fixed to the outside of each main bar. One end of the hollow column is fixedly connected to the center of the end plate. The other end of the hollow column passes through the center of the tail plate and is fixedly connected to the tail plate. The main bars are fixedly connected to one end of the corresponding reinforcing bar one and reinforcing bar two. The tail plate is fixedly connected to the secondary reinforcing structure.

[0007] A through hole is provided at the center of the tail plate surface, and one end of the hollow column protrudes from the through hole.

[0008] The surface of the hollow column is provided with a slot one and a slot two, which are connected in a cross shape. The two ends of the reinforcing rib one and the reinforcing rib two extend from the corresponding slot one and slot two, respectively.

[0009] The secondary reinforcing structure includes a cone head, three reinforcing ribs, and right-angle teeth. One end of the cone head is fixedly connected to the end of the hollow column that protrudes from the through hole. The tip of the cone head extends from the center of the cone-shaped pile head. Several reinforcing ribs are fixedly installed between the cone head and the tail plate. Several right-angle teeth are fixedly installed between the cone head, the hollow column, and the tail plate. The oblique side of the right-angle teeth protrudes from the side of the cone-shaped pile head.

[0010] The right-angled tooth surface has a through hole.

[0011] Compared with the prior art, the advantages of this utility model are: The overall structure of this utility model not only improves the bonding strength between concrete and steel cage, but also ensures the strength at the center of the concrete pile, making the whole structure safer and more reliable during use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the steel cage, main reinforcing structure, and secondary reinforcing structure of this utility model.

[0014] Figure 3 This is an exploded structural diagram of the present invention.

[0015] Figure 4 This is a partially enlarged structural diagram of point A of this utility model.

[0016] In the picture: 1. Concrete pile body; 2. Conical pile head; 3. Main reinforcement; 4. Stirrups; 5. End plate; 6. Tail plate; 7. Hollow column; 8. Conical head; 9. Groove one; 10. Groove two; 11. Reinforcing bar one; 12. Reinforcing bar two; 13. Right angle tooth; 14. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0019] The present invention will be further described below with reference to the accompanying drawings: Example Reference Figure 1-4 A high-strength precast square pile includes a concrete pile body 1, wherein: one end of the concrete pile body 1 is provided with an integral conical pile head 2, the concrete pile body 1 is filled with a steel cage and a main reinforcing structure, the reinforcing structure is fixedly installed inside the steel cage to improve the bonding strength between the steel cage and the concrete pile body 1, the conical pile head 2 is filled with a secondary reinforcing structure to improve the strength of the conical pile head 2, and the secondary reinforcing structure is fixedly connected to the steel cage and the main reinforcing structure; Specifically, the concrete pile body 1 uses C70 high-performance concrete with a concrete strength grade ≥ C70, chloride ion permeability coefficient ≤ 500C, and sulfate erosion resistance grade ≥ K120; The components for preparing C70 high-performance concrete include: Cement: P·O 52.5 grade Portland cement, accounting for 22%; Admixtures: 10% silica fume, 15% fly ash, 18% slag powder; Aggregate: 5-20mm continuously graded crushed stone, with a mud content of ≤0.5%; Admixtures: 2.5% polycarboxylate superplasticizer, 0.9 kg / m³ crack-resistant fiber; The compressive strength is ≥75MPa, the impermeability grade is ≥S12, and the sulfate erosion resistance grade is ≥K150 after 28 days by steam curing process (65℃ constant temperature for 24 hours, heating rate ≤25℃ / h). Specifically, the main reinforcing structure includes a hollow column 7, reinforcing rib 11 and reinforcing rib 2 12. Several reinforcing ribs 11 and 2 12 are uniformly fixedly installed on the hollow column 7. The reinforcing ribs 11 and 2 12 are welded together in a cross shape and arranged in a stacked manner. The hollow column 7, the reinforcing ribs 11 and 2 12 are all fixedly connected to the steel cage. The hollow column 7 is welded to the secondary reinforcing structure. Through the setting of this structure, the bonding strength between the concrete pile body 1 and the center of the steel cage can be improved. Hollow column 7 is made of ultra-high strength steel (such as HTRB630); Reinforcing rib 11 and reinforcing rib 22 are Φ10HTRB630.

[0020] Specifically, the steel cage includes main bars 3, stirrups 4, end plates 5 and tail plates 6. Several main bars 3 are uniformly fixed between end plates 5 and tail plates 6. Several stirrups 4 are uniformly welded to the outside of each main bar 3. One end of the hollow column 7 is welded to the center of the end plate 5. The other end of the hollow column 7 passes through the center of the tail plate 6 and is fixedly connected to the tail plate 6. The main bars 3 are welded to one end of the corresponding reinforcing bars 11 and 22. The tail plate 6 is fixedly connected to the secondary reinforcing structure. Main reinforcement 3 uses HRB630 heat-treated ribbed high-strength steel bars with a yield strength ≥630MPa and an elongation ≥14%, replacing traditional HRB400 steel bars. This reduces the amount of reinforcement per pile by 30% while increasing the bearing capacity by 45%. Stirrup 4 consists of 8 Φ18 HTRB630 bars, spaced 100mm apart; End plate 5 and tail plate 6 are made of Q390B steel with a thickness of ≥20mm and are equipped with M22 or larger friction type high-strength bolt holes.

[0021] Specifically, a through hole is provided at the center of the surface of the tail plate 6, and one end of the hollow column 7 protrudes from the through hole.

[0022] Specifically, the surface of the hollow column 7 is provided with slot 1 9 and slot 2 10, which are connected in a cross shape. The two ends of reinforcing rib 11 and reinforcing rib 2 12 extend from the corresponding slot 1 9 and slot 2 10 respectively and are welded together with the hollow column 7. Through the setting of slot 1 9 and slot 2 10, concrete can be filled into the hollow column 7, increasing the bonding area between the hollow column 7 and the concrete pile body 1, and increasing the bonding strength between the hollow column 7 and reinforcing rib 11 and reinforcing rib 2 12 under the action of concrete.

[0023] Specifically, the secondary reinforcement structure includes a cone head 8, reinforcing ribs 13, and right-angle teeth 14. One end of the cone head 8 is fixedly connected to the end of the hollow column 7 that protrudes from the through hole. The cone tip of the cone head 8 extends from the center of the cone-shaped pile head 2. Several reinforcing ribs 13 are fixedly installed between the cone head 8 and the tail plate 6. Several right-angle teeth 14 are fixedly installed between the cone head 8, the hollow column 7, and the tail plate 6. The oblique side of the right-angle teeth 14 protrudes from the side of the cone-shaped pile head 2. By setting the cone head 8 and the right-angle teeth 14, the strength of the cone-shaped pile head 2 can be improved, and it can be better inserted into the foundation. The cone head 8, reinforcing rib 3 13 and right angle tooth 14 are made of ultra-high strength steel (such as HTRB630).

[0024] Specifically, the right-angle tooth 14 has through holes on its surface so that concrete can fill the through holes, thereby improving the bonding between the right-angle tooth 14 and the concrete.

[0025] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A high-strength precast square pile, characterized by: The concrete pile body (1) includes an integral conical pile head (2) at one end of the concrete pile body (1), a steel cage and a main reinforcing structure are poured inside the concrete pile body (1), the reinforcing structure is fixedly installed inside the steel cage, and a secondary reinforcing structure is poured inside the conical pile head (2), the secondary reinforcing structure is fixedly connected to the steel cage and the main reinforcing structure. The main reinforcing structure includes a hollow column (7), a first reinforcing rib (11) and a second reinforcing rib (12). Several first reinforcing ribs (11) and second reinforcing ribs (12) are uniformly fixed on the hollow column (7). The first reinforcing ribs (11) and second reinforcing ribs (12) are arranged in a cross shape and stacked sequentially. The hollow column (7), the first reinforcing rib (11) and the second reinforcing rib (12) are all fixedly connected to the steel cage. The hollow column (7) is fixedly connected to the secondary reinforcing structure.

2. A high-strength precast square pile according to claim 1, characterized in that: The steel cage includes main bars (3), stirrups (4), end plates (5) and tail plates (6). Several main bars (3) are uniformly fixed between the end plates (5) and the tail plates (6). Several stirrups (4) are uniformly fixed outside each main bar (3). One end of the hollow column (7) is fixedly connected to the center of the end plate (5). The other end of the hollow column (7) passes through the center of the tail plate (6) and is fixedly connected to the tail plate (6). The main bars (3) are fixedly connected to one end of the corresponding reinforcing bars one (11) and reinforcing bars two (12). The tail plate (6) is fixedly connected to the secondary reinforcing structure.

3. A high-strength precast square pile according to claim 2, characterized in that: A through hole is provided at the center of the surface of the tail plate (6), and one end of the hollow column (7) protrudes from the through hole.

4. A high-strength precast square pile according to claim 3, characterized in that: The surface of the hollow column (7) is provided with a slot one (9) and a slot two (10), which are connected in a cross shape. The two ends of the reinforcing rib one (11) and the reinforcing rib two (12) extend from the corresponding slot one (9) and slot two (10), respectively.

5. A high-strength precast square pile according to claim 1, wherein: The secondary reinforcing structure includes a cone head (8), reinforcing ribs (13) and right-angle teeth (14). One end of the cone head (8) is fixedly connected to the end of the hollow column (7) that passes through the through hole. The cone tip of the cone head (8) extends from the center of the cone head (2). Several reinforcing ribs (13) are fixedly installed between the cone head (8) and the tail plate (6). Several right-angle teeth (14) are fixedly installed between the cone head (8), the hollow column (7), and the tail plate (6). The oblique side of the right-angle teeth (14) protrudes from the side of the cone head (2).

6. A high strength prestressed square pile as claimed in claim 5 wherein: The right-angle tooth (14) has a through hole on its surface.

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