Precast pile head structure and connecting structure

Abstract

The utility model relates to the field of precast piles, and discloses a precast pile head structure and a connecting structure, the precast pile head structure comprises a pile head body (1) and a connecting plate (3) positioned at the end part of the pile head, a reinforcing steel bar component (2) is arranged in the pile head body (1), the reinforcing steel bar component (2) is fixedly connected with the connecting plate (3), the side surface of the pile head body (1) is provided with a concave hole (4), the connecting plate (3) is provided with a mounting hole (5), and the mounting hole (5) is communicated with the concave hole (4). And the mounting hole (5) is communicated with the concave hole (4). The pile head structure has the advantages of convenience in connection, low manufacturing cost, simplicity in manufacturing, reliability in connection and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of precast pile, especially to a precast pile head structure and connecting structure. BACKGROUND

[0002] CN206512712U discloses a pile head structure of a precast pile of a pre-tensioned prestressed concrete, and the pre-tensioned prestressed concrete pile, such as a hollow pipe pile, a hollow or solid square pile, is a widely used engineering bearing pile type in various fields of civil engineering, which is usually produced by a factory centrifugal method, has good pile body quality, and is relatively low in price, and is used for entering a designed soil layer by static pressure or hammering to bear the load from an upper building, and should be one of the few most widely used engineering pile types in various fields of civil engineering. However, the current pre-tensioned prestressed concrete hollow pipe pile, hollow or solid square pile has many defects, such as insufficient pile surface friction, permanent corrosion prevention problem of a traditional pile welding joint, and unreliable traditional pile end plate welding joint for an anti-pulling engineering pile. In recent years, a rib pile with a rib pile body has been developed for engineering, the smooth pile surface is changed into a rib surface like a bamboo rib to increase the friction, and a steel joint mechanical buckle type connection is developed for the joint to simplify the connection construction of the pipe pile and better solve the permanent corrosion prevention problem of the pile joint. The rib pile has increased friction on the outer surface and is more suitable for a composite pile formed by being implanted in cement mixed soil. These currently popular precast piles have basically tended to use the steel joint mechanical buckle type connection, but the currently considered most advanced precast pile connection method also has many problems. Firstly, the steel joint mechanical buckle connector is troublesome to process, high in cost, high in installation precision requirement in pile production, and troublesome to install, and more importantly, the buckle type connection often fails to be buckled in part in engineering application, which is fatal to the joint quality of the pile, especially the anti-pulling pile. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a precast pile head structure and connecting structure aiming at the defects in the prior art.

[0004] In order to solve the above technical problems, the utility model solves them through the following technical schemes:

[0005] A precast pile head structure, comprising a pile head body and a connecting plate located at the end of the pile head, a steel assembly is arranged in the pile head body, the steel assembly is fixedly connected with the connecting plate, a recessed cavity is formed in the side surface of the pile head body, and a mounting hole is formed in the connecting plate and communicates with the recessed cavity.

[0006] Preferably, the cross-sectional shape of the recessed cavity is that the inner opening is small and the outer opening is large.

[0007] Preferably, the bottom surface of the recessed cavity is an arc surface or a plane, and the mounting hole is a threaded hole.

[0008] Preferably, the pile head body is cylindrical or regular polygonal prism, and the recessed holes are evenly distributed along the circumference of the side of the pile head body.

[0009] Preferably, the pile head body is a regular polyhedron shape, and each side of the regular polyhedron is provided with a recessed cavity.

[0010] Preferably, the reinforcing steel assembly includes axially arranged column bars and circumferentially arranged stirrups, with the stirrups fixed to the column bars and the column bars and connecting plates welded together.

[0011] Preferably, the stirrup includes a first stirrup forming the outline of the recess, the first stirrup including a fixed part that overlaps the column reinforcement and a shaped part that extends toward the middle of the pile body, the shaped part supporting the side of the recess.

[0012] Preferably, the stirrups also include a second stirrup at the end away from the connecting plate, which is arranged in a ring around the outside of the column reinforcement.

[0013] Preferably, the axis of the connecting plate is collinear with the axis of the pile head body, and the outer diameter of the connecting plate is smaller than the outer diameter of the pile head body.

[0014] A pile head connection structure includes the aforementioned precast pile head structure, wherein the connecting plates of two precast pile heads are fitted together and fixed by fixing bolts passing through the mounting holes of the two connecting plates, and further includes a filling material, which fills the recessed cavity after the fixing bolts are installed.

[0015] Compared with existing technologies, this solution has the following advantages: the new pile head construction and connection method have advantages such as low cost, simple processing, easy connection, safety and reliability compared with the current mechanical snap-fit ​​connection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the pile head.

[0017] Figure 2 This is a schematic diagram of the overall structure of the pile head.

[0018] Figure 3 This is a schematic diagram of the overall structure of the pile head.

[0019] Figure 4 This is a schematic diagram of the overall structure of the pile head.

[0020] Figure 5 This is a schematic diagram of the pile head reinforcement structure.

[0021] Figure 6 This is a schematic diagram of the connection structure of the pile head.

[0022] The technical names of the attached figures are: 1—Pile head body, 2—Reinforcing steel assembly, 3—Connecting plate, 4—Recessed cavity, 5—Installation hole, 6—Column reinforcement, 7—Stirrup I, 8—Stirrup II, 9—Filling material. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] A precast pile head structure includes a pile head body 1 and a connecting plate 3 located at the end of the pile head. A reinforcing steel assembly 2 is disposed within the pile head body 1, and the reinforcing steel assembly 2 and the connecting plate 3 are fixedly connected. A recessed cavity 4 is formed on the side of the pile head body 1, and an installation hole 5 is formed on the connecting plate 3, communicating with the recessed cavity 4. In this embodiment, the pile head body 1 is a cylindrical structure. The reinforcing steel assembly 2 includes a main steel bar, which is riveted and fixed to the connecting plate 3. The connecting plate 3 is a disc-shaped or annular steel plate, and the connecting plate 3 and the pile head body 1 are coaxially arranged. The pile head body 1 is formed by concrete and the reinforcing steel assembly 2.

[0026] In this design, the cross-sectional shape of the recessed cavity 4 is that the inner opening is smaller than the outer opening. The bottom surface of the recessed cavity 4 is either curved or flat; the mounting hole 5 is a threaded hole. The bottom surface of the recessed cavity 4 selected in this design is curved.

[0027] As can be seen from the above, the pile head body 1 is cylindrical or a regular polygonal prism, and the recessed holes 4 are evenly arranged along the circumference of the side of the pile head body 1. This scheme selects a cylindrical structure, and the number of recessed holes 4 is multiple and evenly arranged along the circumference of the side of the pile head body 1, specifically 4 to 8.

[0028] In this design, the reinforcing steel assembly 2 includes axially arranged column bars 6 and circumferentially arranged stirrups. The stirrups are fixed to the column bars 6, and the column bars 6 and connecting plates 3 are welded together. The column bars 6 and stirrups improve the overall strength of the pile head under compression or hammering conditions.

[0029] The specific stirrups include stirrup 7 forming the outline of the recessed cavity 4. Stirrup 7 includes a fixed part that overlaps the column reinforcement 6 and a forming part that extends towards the middle of the pile body. The forming part supports the side of the recessed cavity 4. The stirrups also include stirrup 8 at the end away from the connecting plate 3. Stirrup 8 is wrapped around the outside of the column reinforcement 6 in a ring shape.

[0030] The axis of the connecting plate 3 is collinear with the axis of the pile head body 1, and the outer diameter of the connecting plate 3 is smaller than the outer diameter of the pile head body 1. This facilitates ensuring a smooth and uniform filling surface when filling the recessed cavity 4 with the material 9 later.

[0031] Example 2

[0032] The difference between this embodiment and embodiment 1 is that the pile head body 1 is a regular polyhedron shape, and each side of the regular polyhedron is provided with a recessed cavity 4. The shape of the connecting plate 3 is adapted to the cross-sectional shape of the pile head body 1.

[0033] Example 3

[0034] A pile head connection structure includes a precast pile head structure according to the above embodiment. The connection structure includes two precast pile heads, the connecting plates 3 of the two precast pile heads are attached to each other and fixed by fixing bolts passing through the mounting holes 5 of the two connecting plates 3. It also includes a filling material 9, which fills the recessed cavity 4 after the fixing bolts are installed.

Claims

1. A precast pile head structure, characterized in that: The pile head body (1) includes a connecting plate (3) located at the end of the pile head. A steel reinforcement assembly (2) is provided inside the pile head body (1). The steel reinforcement assembly (2) and the connecting plate (3) are fixedly connected. A recessed cavity (4) is opened on the side of the pile head body (1). An installation hole (5) is opened on the connecting plate (3). The installation hole (5) communicates with the recessed cavity (4). The steel reinforcement assembly (2) includes axially arranged column bars (6) and circumferentially arranged stirrups. The stirrups are fixed on the column bars (6), and the column bars (6) and the connecting plate (3) are welded and fixed. The stirrups include a stirrup (7) that forms the outline of the recess (4), the stirrup (7) including a fixed part that overlaps the column reinforcement (6) and a forming part that extends toward the middle of the pile body, the forming part supporting the side of the recess (4). The stirrups also include a second stirrup (8) at the end away from the connecting plate (3), which is wrapped around the outside of the column reinforcement (6) in a ring shape; The axis of the connecting plate (3) is collinear with the axis of the pile head body (1), and the outer diameter of the connecting plate (3) is smaller than the outer diameter of the pile head body (1).

2. The precast pile head structure according to claim 1, characterized in that: The cross-sectional shape of the recessed hole (4) is that the inner opening is small and the outer opening is large.

3. A precast pile head structure according to claim 2, characterized in that: The bottom surface of the recessed cavity (4) is an arc-shaped surface or a plane; the mounting hole (5) is a threaded hole.

4. A precast pile head structure according to claim 1, characterized in that: The pile head body (1) is cylindrical or regular polygonal prism, and the recessed holes (4) are evenly arranged along the circumference of the side of the pile head body (1).

5. A precast pile head structure according to claim 1, characterized in that: The pile head body (1) is a regular polyhedron shape, and each side of the regular polyhedron is provided with a recessed cavity (4).

6. A pile head connection structure, characterized in that: The precast pile head structure includes any one of claims 1 to 5, wherein the connecting plates (3) of the two precast pile heads are attached to each other and fixed by fixing bolts passing through the mounting holes (5) of the two connecting plates (3), and also includes filling material (9), which fills the recessed cavity (4) after the fixing bolts are installed.

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