Pile head structure

Abstract

The utility model relates to the field of concrete precast piles, and discloses a pile head structure which comprises a pile core in the middle, reinforcing ribs located on the pile core and a connecting plate located at the end of the pile core, the pile core is of a reinforced concrete structure, and the connecting plate and the pile core are of an integrally-formed structure through pouring or are fixed through anchoring with the end of a steel bar in the pile core. The reinforcing ribs and the connecting plates are arranged in the direction perpendicular to the axis of the pile core, the reinforcing ribs are of an annular structure arranged along the outer side annular face of the pile core or a plurality of reinforcing units distributed along the outer side annular face of the pile core, the reinforcing ribs and the pile core are of an integrated structure, connecting holes are formed in the connecting plates, and mounting areas are formed between the connecting plates and the reinforcing ribs. The pile head structure has the advantages of high connection strength, corrosion resistance, stretching resistance and the like.

Description

Technical Field

[0001] The utility model relates to the field of prefabricated piles, in particular to a pile head structure. Background Art

[0002] Concrete hollow pipe piles are generally used to strengthen the bearing capacity of foundations. By driving concrete hollow pipe piles into the ground, they transfer the weight of the building to the higher-bearing soil layer below. However, existing hollow pipe pile connections typically involve mechanically welding the end caps of the two concrete hollow pipe columns, a labor-intensive and time-consuming process.

[0003] Chinese patent CN220666198U discloses an end cap connection structure for concrete hollow pipe piles, which is fixed by end cap sliding grooves. This structure does not solve the problems of insufficient surface friction resistance of the joint part, poor pull-out bearing capacity, and poor corrosion resistance of the joint in traditional pile connections. Utility Model Content

[0004] The utility model aims at the shortcomings of the prior art and provides a pile head structure.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A pile head structure includes a pile core in the middle, reinforcing ribs located on the pile core, and a mounting plate located at the end of the pile core. The pile core is a reinforced concrete structure. The mounting plate and the pile core are cast as an integral structure or are fixed by anchoring to the end of the steel bar in the pile core. The reinforcing ribs and the mounting plate are arranged perpendicular to the axis of the pile core. The reinforcing ribs are annular structures arranged along the outer annular surface of the pile core or are several reinforcing units distributed along the outer annular surface of the pile core. The reinforcing ribs and the pile core are an integral structure. A connecting hole is opened on the mounting plate, and an installation area is formed between the mounting plate and the reinforcing ribs.

[0007] Preferably, the installation area further includes a plurality of axial ribs arranged in the installation area, the ribs are circumferentially distributed along the outer side surface of the pile core, the ribs and the pile core are integrally formed by casting, one end of the rib is fixedly connected to the installation plate, and the other end is fixedly connected to the reinforcing rib; the area formed between adjacent ribs in the installation area is the operating area, and the connecting hole is connected to the operating area.

[0008] Preferably, it further includes an axially arranged reinforcing rib, a fixing hole is opened on the mounting plate, one end of the reinforcing rib is connected to the fixing hole and fixed to the mounting plate, and the other end of the reinforcing rib is fixedly connected to the reinforcing rib.

[0009] Preferably, it also includes reinforcing ribs, which are steel bars. The reinforcing ribs are located inside the ribs, and a fixing hole is opened on the mounting plate. One end of the reinforcing rib is connected to the fixing hole and fixed to the mounting plate, and the other end of the reinforcing rib is fixedly connected to the reinforcing rib; the ribs, reinforcing ribs, pile core, mounting plate, and reinforcing ribs are formed as one piece by pouring concrete.

[0010] Preferably, stirrup 1 is provided inside the reinforcing rib, and stirrup 1 and the reinforcing rib form an outer steel cage.

[0011] Preferably, the exposed portion of the installation area is coated with an anti-corrosion layer;

[0012] Or / and, it also includes sealing putty and reinforcing cloth. When the pile head structure is connected, the sealing putty is filled in the operation area, and the outside of the sealing putty is covered with the reinforcing cloth.

[0013] Preferably, the cross-sectional width of the operating area perpendicular to the pile core axis is smaller at the inner end and larger at the outer end.

[0014] Preferably, a hole one is opened on the mounting plate, a steel cage is arranged in the pile core, and the axial reinforcement of the steel cage is connected to the hole one to achieve fixation to the mounting plate.

[0015] Preferably, the mounting plate is a disc-shaped or annular steel plate, and the mounting plate is coaxially arranged with the pile core.

[0016] Preferably, the outer diameter of the mounting plate is smaller than or equal to the outer diameter of the reinforcing rib.

[0017] The pile head structure designed by the utility model can facilitate the connection between piles, and can greatly improve the bearing capacity and pull-out resistance as well as the lateral friction resistance. The rib shape is used to realize the reliable flange bolt connection of the prefabricated hollow piles, and the problem of permanent corrosion resistance of the joints is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the pile head.

[0019] Figure 2 yes Figure 1 main view.

[0020] Figure 3 It is a structural diagram of the pile head.

[0021] Figure 4 It is a structural diagram of the pile head.

[0022] Figure 5 This is an exploded view of the structure coated with anti-corrosion layer and sealing putty.

[0023] Figure 6 This is the effect picture of the coating with anti-corrosion layer and sealing putty.

[0024] The technical names of the figures in the figure are: 2-reinforcement rib, 3-inner steel cage, 4-mounting plate, 5-hole one, 6-outer steel cage, 7-fixing hole, 8-connecting hole, 9-rib, 11-operating area, 12-high-strength bolt, 13-anti-corrosion layer, 14-reinforcing mesh, 10-reinforcement rib, 16-short rib, 17-steel rod, 18-stirrup. DETAILED DESCRIPTION

[0025] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] A pile head structure characterized by comprising a central pile core 1, reinforcing ribs 2 located on the pile core 1, and a mounting plate 4 located at the end of the pile core 1. The pile core 1, reinforcing ribs 2, and mounting plate 4 are an integrated structure. The pile core 1 is a reinforced concrete structure. The mounting plate 4 and the pile core 1 are cast integrally or anchored to the ends of the steel bars in the pile core 1. The reinforcing ribs 2 and the pile core 1 are an integral structure. The reinforcing ribs 2 and the mounting plate 4 are arranged perpendicular to the axis of the pile core 1. The reinforcing ribs 2 are annular structures arranged along the outer annular surface of the pile core 1 or are composed of multiple reinforcement units distributed along the outer annular surface of the pile core 1. In this embodiment, the reinforcing ribs 2 are a complete annular structure. The reinforcing ribs 2 and the pile core 1 are an integrated structure. The mounting plate 4 is provided with multiple connection holes 8, forming an installation area between the mounting plate 4 and the reinforcing ribs 2. Specifically, two precast piles are typically fixedly connected using high-strength bolts 12 inserted through the connection holes 8. The specific installation area is the cylindrical annular area surrounded by the mounting plate 4, the reinforcing ribs 2, and the pile core 1.

[0028] The installation area also includes multiple axial ribs 9 distributed circumferentially along the outer surface of the pile core 1. The ribs 9 and the pile core 1 are integrally formed by casting. Specifically, the ribs 9 and the pile core 1 are formed as a single structure by pouring concrete. In this embodiment, the pile core 1, ribs 9, and reinforcing ribs 2 are all provided with steel reinforcement. One end of the rib 9 is fixedly connected to the installation plate 4, and the other end is fixedly connected to the reinforcing rib 2. The area between adjacent ribs 9 in the installation area is the operating area 11. The connecting holes 8 are connected to the operating area 11, and the fixing bolts can be inserted through the connecting holes 8 and placed in the operating area 11.

[0029] The pile also includes a reinforcing rib 10, which is a steel bar. The rib 10 is located within the rib 9. The mounting plate 4 has a fixing hole 7. One end of the rib 10 is connected to the fixing hole 7 and secured to the mounting plate 4 by anchoring. The other end of the rib 10 is fixedly connected to the reinforcing rib 2. The rib 9, rib 10, pile core 1, mounting plate 4, and rib 2 are integrally formed by pouring concrete. Stirrups 18 are located within the reinforcing rib 2. Stirrups 18 and rib 10 form an outer reinforcement cage 6. Stirrups 18 are annular structures that match the shape of the reinforcing rib 2. The reinforcing rib 10 is a steel bar or steel rod 17. In this embodiment, the reinforcing rib 10 is fixed to the reinforcing rib 2 by integrally securing the rib 2 with the reinforcing rib 10 during molding. The reinforcing rib is constructed of either a broken rib 16 or a long steel rod 17. The long steel rod 17 is designed to mate with the long rib integrally formed with the pile head. The reinforcing rib 10 and the stirrups 18 within the rib 2 form an outer reinforcement cage. Specifically, in this embodiment, the mounting plate 4 is formed in the rib 9, and the rib 9 passes through the mounting plate 4. This structure can bear a larger load, can be used as a pull-out pile and withstand a larger tensile force, and increase the crack resistance of the pile body.

[0030] The cross-sectional width of the operating area 11 perpendicular to the axis of the pile core 1 is smaller at the inner end and larger at the outer end, and its specific shape is determined by the shape of the ribs 9 .

[0031] The mounting plate 4 is provided with a hole 5. A reinforcement cage 3 is located within the pile core 1. The axial reinforcement of the cage 3 connects to the hole 5, securing it to the mounting plate 4. The longitudinal main steel bars of the cage 3 can be assembled using a piercing machine, while the spiral stirrups can also be automatically tied using a hoop winding machine commonly used in tubular pile production. In this embodiment, the axial main steel bars are anchored in the hole 5 formed in the steel end ring plate 4.

[0032] In this embodiment, the pile core 1 is a hollow tubular pile structure, and the mounting plate 4 is a disc-shaped or annular steel plate that fits the hollow structure of the central portion of the pile core 1 to prevent blockage of the central hole of the pile core 1. The mounting plate 4 is coaxially arranged with the pile core 1, and the connecting holes 8 are evenly distributed along the circumference of the mounting plate 4. The mounting plate 4 is formed into a flange 4 structure.

[0033] During installation, the two pile heads are aligned, or one pile is provided with a pin that matches the connection hole 8 or a connection hole 8 that matches the mounting plate 4. The two are fixedly connected by a pin nut or a high-strength bolt 12. Specifically, in this embodiment, both are mounting plates 4, so the connection structure is a flange connection, thereby achieving a connection between the two pile heads or piles with high tensile resistance and strength. In addition, the joint can be subsequently treated to achieve corrosion resistance.

[0034] Example 2

[0035] The difference from Example 1 is that: the rib 9 is not provided, one end of the reinforcing rib 10 is fixedly connected to the mounting plate 4 , and the other end is fixedly connected to the reinforcing rib 2 .

[0036] Example 3

[0037] The difference from Example 1 is that the reinforcing rib 10 in this embodiment is not located in the rib 9 , one end of which is fixedly connected to the mounting plate 4 , and the other end is fixedly connected to the reinforcing rib 2 , and the reinforcing rib 10 is entirely located in the operating area 11 .

[0038] Example 4

[0039] In this embodiment, the exposed portion of the installation area is coated with an anti-corrosion layer 13. Specifically, in this embodiment, the anti-corrosion layer 13 is coated on the exposed surface of the operating area 11 to protect the anti-corrosion coating from wear. This solution is applicable to the above embodiment.

[0040] Example 5

[0041] Based on Example 4, for projects requiring higher corrosion resistance, such as those requiring pull-out resistance, after applying the anti-corrosion coating, the operating area 11 can be sealed with a similar, air-resistant, and rapidly solidifying mortar. A special stiffening gauze cloth 14 is then tightly wrapped around the pile head and embedded in the pile cement. The cement quickly solidifies, completing the pile connection. Specifically, the operating area 11 is filled with sealing cement 15, which is then covered with stiffening cloth 14. Stiffening cloth 14 is a gauze cloth that becomes embedded in the cement during the winding process.

[0042] Example 6

[0043] The structure of this embodiment is applicable to all the above embodiments. The outer diameter of the mounting plate 4 is smaller than or equal to the outer diameter of the reinforcing rib 2. The slightly smaller outer diameter can also form a covering on the outside of the mounting plate 4 during sealing.

[0044] Example 7

[0045] The difference from Example 1 is that the reinforcement ribs 2 are multiple reinforcement units distributed outside the pile core 1 , and each reinforcement unit is fixedly connected to the mounting plate 4 through the tooth ribs 9 and the reinforcement ribs 10 in the tooth ribs 9 .

Claims

1. A pile head structure, characterized in that: The invention comprises a pile core (1) in the middle, a reinforcing rib (2) located on the pile core (1), and a mounting plate (4) located at the end of the pile core (1); the pile core (1), the reinforcing rib (2) and the mounting plate (4) are an integrated structure; the pile core (1) is a reinforced concrete structure; the mounting plate (4) and the pile core (1) are an integrated structure formed by casting or are formed into an integrated structure by anchoring and fixing with the end of the steel bar in the pile core (1); the reinforcing rib (2) and the pile core (1) are an integrated structure; the reinforcing rib (2) and the mounting plate (4) are arranged perpendicular to the axial direction of the pile core (1); the reinforcing rib (2) is an annular structure arranged along the outer annular surface of the pile core (1) or is a plurality of reinforcing units distributed along the outer annular surface of the pile core (1); a plurality of connection holes (8) are opened on the mounting plate (4); and an installation area is formed between the mounting plate (4) and the reinforcing rib (2).

2. A pile head structure according to claim 1, characterized in that: The invention also includes a plurality of axial ribs (9) arranged in the installation area, the ribs (9) are circumferentially distributed along the outer side surface of the pile core (1), the ribs (9) and the pile core (1) are integrally formed by casting, one end of the rib (9) is fixedly connected to the installation plate (4), and the other end is fixedly connected to the reinforcing rib (2); the area formed between adjacent ribs (9) in the installation area is an operating area (11), and the connecting hole (8) is connected to the operating area (11).

3. A pile head structure according to claim 1 or 2, characterized in that: The invention also includes an axially arranged reinforcing rib (10), a fixing hole (7) is provided on the mounting plate (4), one end of the reinforcing rib (10) is connected to the fixing hole (7) and fixed to the mounting plate (4), and the other end of the reinforcing rib (10) is fixedly connected to the reinforcing rib (2).

4. A pile head structure according to claim 2, characterized in that: The pile (1) further comprises a reinforcing rib (10), which is a steel bar. The reinforcing rib (10) is located inside the rib (9). A fixing hole (7) is provided on the mounting plate (4). One end of the reinforcing rib (10) is connected to the fixing hole (7) and fixed to the mounting plate (4). The other end of the reinforcing rib (10) is fixedly connected to the reinforcing rib (2). The rib (9), the reinforcing rib (10), the pile core (1), the mounting plate (4), and the reinforcing rib (2) are integrally formed by pouring concrete.

5. The pile head structure according to claim 4, characterized in that: A stirrup (18) is provided inside the reinforcing rib (2), and the stirrup (18) and the reinforcing rib (10) form an outer steel cage (6).

6. A pile head structure according to claim 1, 2, 4 or 5, characterized in that: The exposed portion of the installation area is coated with an anti-corrosion layer (13); Or / and, it also includes sealing glue and reinforcing cloth (14), when the pile head structure is connected, the sealing glue is filled in the operation area (11), and the sealing glue (15) is covered with the reinforcing cloth (14) outside.

7. The pile head structure according to claim 2, characterized in that: The cross-sectional width of the operation area (11) perpendicular to the axis of the pile core (1) is smaller at the inner end and larger at the outer end.

8. The pile head structure according to claim 4, characterized in that: A hole (5) is provided on the mounting plate (4), a steel cage (3) is arranged in the pile core (1), and the axial reinforcement of the steel cage (3) is connected to the hole (5) to achieve fixation with the mounting plate (4).

9. A pile head structure according to claim 1 or 2 or 4 or 5 or 7 or 8, characterized in that: The pile core (1) is a hollow pipe pile structure, the mounting plate (4) is a disc-shaped or annular steel plate, and the mounting plate (4) and the pile core (1) are coaxially arranged.

10. The pile head structure according to claim 1, characterized in that: The outer diameter of the mounting plate (4) is smaller than or equal to the outer diameter of the reinforcing rib (2).

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