Precast pile foundation

Abstract

The precast pile foundation comprises a concrete pile body, an upper end plate and a lower end plate are arranged at the two ends of the concrete pile body correspondingly, a first guide plate and a second guide plate are arranged on the upper end plate and the lower end plate correspondingly, and a convex part and a concave part are arranged on the first guide plate and the second guide plate correspondingly; the convex part and the concave part are matched in shape, the side faces of the convex part and the concave part are inclined faces or arc faces, the upper end plate and the lower end plate are further provided with a positioning pin and a positioning hole respectively, during pile splicing, adjacent concrete pile bodies drive the upper concrete pile body to rotate through cooperation of the first guide plate and the second guide plate, and the positioning pin and the positioning hole rotate to correspond in position. The first guide plate and the second guide plate are arranged on the upper end plate and the lower end plate of the concrete pile body correspondingly, meanwhile, the first guide plate and the second guide plate are provided with the inclined faces or the arc faces, the first guide plate and the second guide plate are matched during pile splicing, the upper concrete pile body can be driven to rotate, alignment matching is facilitated, and pile splicing is convenient.

Description

Technical Field

[0001] This application relates to the technical field of building construction, and in particular to a precast pile foundation. Background Art

[0002] The precast pile foundation, also known as the prestressed pipe pile, is a slender precast concrete component with a hollow cylinder. Its construction has the advantages of economic cost, short construction period, and guaranteed quality. The precast pile foundation mainly consists of a cylindrical pile body, end plates, steel sleeve hoops, etc.

[0003] The precast pile foundation is constructed by driving or pressing it into the foundation to reach the required depth through a pile driver. Its construction process is generally: measurement and positioning, pile driver positioning, alignment, pile pressing, pile splicing, pile feeding or cutting, and static pile pressing to the designed height. During the pile splicing process, when the lower section of the pile is pressed to be exposed 0.8 - 1.0 m above the ground, the upper section of the pile can be spliced. Currently, the pile splicing generally uses positioning pins and connectors. The positioning pins are set on the lower end plate, and corresponding positioning holes are set on the upper end plate. After the positioning pins are inserted, connectors are set at the connection and high-strength bolts are screwed into the sides of the connectors for connection. Finally, the two ends of the connectors are welded. After welding and cooling, the pile driving continues. The operation is very cumbersome.

[0004] Currently, there are some pile foundation structures on the market that can quickly align and improve the pile splicing efficiency. For example, a Chinese patent with the authorization announcement number CN216275646U and the publication date of April 12, 2022, discloses a prestressed pipe pile, which relates to the field of pipe pile technology. It includes an upper end plate provided at one end of the prestressed pipe pile and a lower end plate provided at the other end of the prestressed pipe pile. A locking component for fixing the lower end plate of another prestressed pipe pile is provided on the upper end plate of a prestressed pipe pile, and a positioning component for inserting and aligning another prestressed pipe pile is provided on one side of the prestressed pipe pile close to the upper end plate.

[0005] This application improves the alignment rate between pipe piles during the pile connection process by setting a locking component on the lower end plate and a positioning component on the upper end plate. Regarding the above related technology, the inventor believes that the structure adopted in this application is relatively complex, and it is time-consuming and laborious to manually rotate the upper section of the prestressed pipe pile during the alignment process. Summary of the Utility Model

[0006] This application provides a precast pile foundation that is easy to install and align.

[0007] A precast pile foundation provided by this application adopts the following technical solutions:

[0008] A precast pile foundation includes a concrete pile body. Upper end plates and lower end plates are respectively arranged at both ends of the concrete pile body. First guide plates and second guide plates are respectively arranged on the upper end plates and the lower end plates. The first guide plates and the second guide plates are both annular plates, and convex parts and concave parts are respectively arranged on the first guide plates and the second guide plates. The shapes of the convex parts and the concave parts match each other, and the sides of the two are inclined surfaces or arc surfaces. Positioning pins and positioning holes are also respectively arranged on the upper end plates and the lower end plates. When splicing the piles, the adjacent concrete pile bodies drive the upper concrete pile body to rotate through the cooperation of the first guide plates and the second guide plates, and the positions of the positioning pins and the positioning holes are rotated to correspond to each other.

[0009] Preferably, the concrete pile body is cylindrical. The upper end plates and the lower end plates are both annular structures and are integrally cast with the concrete pile body. The outer sides of the first guide plates and the second guide plates are respectively welded to the inner sides of the upper end plates and the lower end plates. The ends of the first guide plates extend out of the upper end plates, and the second guide plates are located inside the lower end plates.

[0010] Preferably, there are multiple convex parts and concave parts on the first guide plates and the second guide plates. Vertical sections are arranged in the middle of the convex parts and the concave parts, and the height of the vertical sections is greater than the height of the positioning pins. Rounded corners are arranged at the end edges of the convex parts and the concave parts.

[0011] Preferably, depth marking lines are arranged on the side surface of the concrete pile body. The depth marking lines are annular and are evenly distributed from the bottom to the top of the concrete pile body. Numerical values are arranged on the depth marking lines.

[0012] Preferably, verticality marking lines are arranged on the side surface of the concrete pile body. The verticality marking lines are in the same axial direction as the concrete pile body.

[0013] Preferably, there are multiple verticality marking lines. The multiple verticality marking lines are evenly arranged along the circumferential direction of the concrete pile body. The width of the verticality marking lines is greater than the width of the depth marking lines.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. By respectively arranging the first guide plates and the second guide plates on the upper end plates and the lower end plates of the concrete pile body, and at the same time, the inclined surfaces or arc surfaces are arranged on the first guide plates and the second guide plates. When splicing the piles, the first guide plates and the second guide plates cooperate. Since both of them are annular structures and the inclined surfaces or arc surfaces are arranged on the sides, the inclined surfaces or arc surfaces can play a guiding role, can drive the upper concrete pile body to rotate, are convenient for alignment and cooperation, are simple to operate, and are convenient for pile splicing.

[0016] 2. By welding the first guide plate and the second guide plate to the inner sides of the upper end plate and the lower end plate, with the first guide plate protruding from the upper end plate and the second guide plate located inside the lower end plate, and combining the positioning pins and the positioning holes, the stable connection of the upper end plate and the lower short plate of adjacent concrete pile bodies can be ensured, facilitating subsequent connection.

[0017] 3. By respectively arranging a plurality of convex parts and concave parts on the first guide plate and the second guide plate, it is convenient for alignment and installation; at the same time, vertical sections are arranged in the middle of the convex parts and the concave parts to ensure that the two concrete pile bodies are aligned first and then lowered during pile splicing, ensuring the connection of the positioning pins and ensuring the pile splicing effect.

[0018] 4. By arranging depth marking lines and verticality marking lines on the side of the concrete pile body, it is convenient to observe during pile splicing or pile driving operations, facilitating the operation. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural view of a precast pile foundation in a preferred embodiment of the present application.

[0020] Figure 2 It is a schematic structural view of another perspective of the precast pile foundation in a preferred embodiment of the present application.

[0021] Figure 3 It is a schematic structural view of the first guide plate in a preferred embodiment of the present application.

[0022] Figure 4 It is a schematic structural view of the second guide plate in a preferred embodiment of the present application.

[0023] Description of the Reference Numerals: 1, concrete pile body; 2, upper end plate; 3, lower end plate; 4, first guide plate; 401, convex part; 5, second guide plate; 501, concave part; 6, positioning pin; 7, positioning hole; 8, depth marking line; 9, verticality marking line. Detailed Description of the Embodiment

[0024] The following further describes the present application in detail with reference to the accompanying drawings.

[0025] The embodiment of the present application discloses a precast pile foundation.

[0026] Refer to Figures 1 to 4, a precast pile foundation, comprising a cylindrical concrete pile body 1. Upper end plates 2 and lower end plates 3 are respectively arranged at both ends of the concrete pile body 1. The upper end plates 2 and the lower end plates 3 are both annular structures and are integrally cast with the concrete pile body 1. A first guide plate 4 and a second guide plate 5 are respectively arranged on the upper end plate 2 and the lower end plate 3. The first guide plate 4 and the second guide plate 5 are both annular plates, and the outer sides of the first guide plate 4 and the second guide plate 5 are respectively welded to the inner sides of the upper end plate 2 and the lower end plate 3. Specifically, the end of the first guide plate 4 extends out of the upper end plate 2, and the second guide plate 5 is located inside the lower end plate 3. A plurality of convex portions 401 and a plurality of concave portions 501 are respectively arranged on the first guide plate 4 and the second guide plate 5. The shapes of the convex portions 401 and the concave portions 501 match each other, and the sides of the two are inclined surfaces or arc surfaces. Positioning pins 6 and positioning holes 7 are respectively arranged on the upper end plate 2 and the lower end plate 3. When splicing the piles, the adjacent concrete pile bodies 1 drive the upper concrete pile body 1 to rotate through the cooperation of the first guide plate 4 and the second guide plate 5, and the positions of the positioning pins 6 and the positioning holes 7 are rotated to correspond. Specifically, in the present application, a vertical section is arranged in the middle of the convex portion 401 and the concave portion 501, and the height of the vertical section is greater than the height of the positioning pin 6. The end edges of the convex portion 401 and the concave portion 501 are provided with rounded corners.

[0027] Refer to Figure 1 and Figure 2 , depth marking lines 8 and verticality marking lines 9 are arranged on the side surface of the concrete pile body 1. The depth marking lines 8 are multiple rings and are evenly distributed from the bottom to the top of the concrete pile body 1. Numerical values (not shown in the figure) are arranged on the depth marking lines 8. The verticality marking lines 9 are multiple, and the multiple verticality marking lines 9 are evenly arranged along the circumferential direction of the concrete pile body 1. The verticality marking lines 9 are in the same axial direction as the concrete pile body 1. The width of the verticality marking lines 9 is greater than the width of the depth marking lines 8, which is convenient for observation at a long distance.

[0028] The implementation principle is as follows: In the present application, the first guide plate 4 and the second guide plate 5 are respectively arranged on the upper end plate 2 and the lower end plate 3 of the concrete pile body 1. At the same time, the first guide plate 4 and the second guide plate 5 are provided with inclined surfaces or arc surfaces. When splicing the piles, the first guide plate 4 and the second guide plate 5 cooperate. Since both of them are annular structures and the sides are provided with inclined surfaces or arc surfaces, the inclined surfaces or arc surfaces can play a guiding role and can drive the upper concrete pile body 1 to rotate, which is convenient for alignment and cooperation, with simple operation and convenient pile splicing; by arranging the depth marking lines 8 and the verticality marking lines 9 on the side surface of the concrete pile body 1, it is convenient to observe during pile splicing or driving operations, which is convenient for operation.

[0029] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A precast pile foundation, characterized in that: It includes a concrete pile body (1), with an upper end plate (2) and a lower end plate (3) respectively arranged at both ends of the concrete pile body (1). A first guide plate (4) and a second guide plate (5) are respectively arranged on the upper end plate (2) and the lower end plate (3). Both the first guide plate (4) and the second guide plate (5) are annular plates, and a convex part (401) and a concave part (501) are respectively arranged on the first guide plate (4) and the second guide plate (5). The shapes of the convex part (401) and the concave part (501) match each other, and the sides of the two are inclined planes or arc surfaces. A positioning pin (6) and a positioning hole (7) are also respectively arranged on the upper end plate (2) and the lower end plate (3). When splicing piles, the adjacent concrete pile bodies (1) drive the upper concrete pile body (1) to rotate through the cooperation of the first guide plate (4) and the second guide plate (5), and the positions of the positioning pin (6) and the positioning hole (7) are rotated to correspond to each other.

2. The precast pile foundation according to claim 1, characterized in that: The concrete pile body (1) is cylindrical. Both the upper end plate (2) and the lower end plate (3) are annular structures and are integrally cast with the concrete pile body (1). The outer sides of the first guide plate (4) and the second guide plate (5) are respectively welded to the inner sides of the upper end plate (2) and the lower end plate (3). The end of the first guide plate (4) extends out of the upper end plate (2), and the second guide plate (5) is located inside the lower end plate (3).

3. A precast pile foundation according to claim 1, wherein: There are multiple convex parts (401) and concave parts (501) on the first guide plate (4) and the second guide plate (5). A vertical section is arranged in the middle of the convex part (401) and the concave part (501), and the height of the vertical section is greater than the height of the positioning pin (6). Rounded corners are arranged at the end edges of the convex part (401) and the concave part (501).

4. A precast pile foundation according to claim 1, wherein: A depth marking line (8) is arranged on the side of the concrete pile body (1). The depth marking line (8) is annular and is evenly distributed from the bottom to the top of the concrete pile body (1). Numerical values are arranged on the depth marking line (8).

5. A precast pile foundation according to claim 4, characterized in that: A verticality marking line (9) is arranged on the side of the concrete pile body (1). The verticality marking line (9) is in the same axial direction as the concrete pile body (1).

6. A precast pile foundation according to claim 5, characterized in that: There are multiple verticality marking lines (9). The multiple verticality marking lines (9) are evenly arranged along the circumferential direction of the concrete pile body (1). The width of the verticality marking line (9) is greater than the width of the depth marking line (8).

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