A precast concrete square pile

Abstract

The application relates to a precast concrete square pile and relates to the technical field of precast piles, which comprises an upper pile body, a lower pile body, a plurality of anchoring bars provided through an upper end plate, the lower ends of the anchoring bars are located outside the upper end plate and are fixed with protruding blocks, a lower end plate is provided with installation grooves for the protruding blocks to enter, the installation grooves comprise circular grooves for the protruding blocks to enter and arc-shaped grooves for the anchoring bars to slide, the centers of the arc-shaped grooves are located at the center of the lower end plate; the outer sidewalls of the upper pile body and the lower pile body are provided with communicated side grooves, the side grooves are fixed with reinforcing plates through fixing bolts, and the two ends of the reinforcing plates are respectively located on the upper pile body and the lower pile body. The lower end plate is pulled and fixed through the protruding blocks, the middle part of the pile body is prevented from being separated, the reinforcing plates are used for preventing the pile body from rotating and separating on the outer wall of the pile body, the two functions are simultaneously used, the combined strength of the upper pile body and the lower pile body is further ensured, any relative movement is avoided, the installation process is convenient and fast, and the outer wall of the square pile is flat and free of defects after installation.

Description

Technical Field

[0001] This application relates to the field of precast pile technology, and in particular to a precast concrete square pile. Background Technology

[0002] Precast piles are piles of various materials and forms manufactured in factories or on construction sites, and then driven, pressed, or vibrated into the soil using pile driving equipment. Reinforced concrete solid square piles are precast on the ground, making it easy to ensure manufacturing quality. They have high bearing capacity, can withstand large loads, are sturdy and durable, and can be constructed quickly, making them one of the most widely used pile types.

[0003] A utility model patent with publication number CN203096730U discloses a precast concrete square pile joint, including an upper pile and a lower pile. The lower end of the upper pile is provided with a concave structure made of elastic steel. This concave structure can be pre-welded to the main reinforcing bars on the upper pile to ensure the connection strength between the concave structure and the upper pile. The upper part of the lower pile is provided with an upper convex structure that matches the concave structure. The upper convex structure can also be made of elastic steel. It can also be pre-welded to the reinforcing bars of the lower pile during precasting to ensure the connection strength. The upper convex structure is inserted into the concave structure and connected by a joint bolt.

[0004] The aforementioned technologies can achieve the connection and fixation of the upper and lower piles. To improve the stability of the pile connection, this application provides another connection method. Utility Model Content

[0005] This application provides a precast concrete square pile that can connect and fix the upper and lower pile bodies, and has the advantages of structural stability and convenient installation.

[0006] This application provides a precast concrete square pile, which adopts the following technical solution:

[0007] A precast concrete square pile includes an upper pile body and a lower pile body. An upper end plate is fixed to the bottom end of the upper pile body, and a lower end plate is fixed to the top end of the lower pile body. Multiple anchor bars are installed through the upper end plate. The anchor bars are welded to the upper end plate and fixed. The upper end of the anchor bars is inserted into the upper pile body, and the lower end of the anchor bars is located outside the upper end plate and fixed with a protrusion. The lower end plate has an installation groove for the protrusion to enter. The installation groove includes a circular groove for the protrusion to enter and an arc-shaped groove for the anchor bars to slide. The center of the arc-shaped groove is located at the center of the lower end plate. The arc-shaped groove is a constricted groove, and the protrusion cannot pass through the opening of the arc-shaped groove.

[0008] The outer side walls of the upper and lower pile bodies are provided with communicating side grooves, and a reinforcing plate is fixed in the side groove by fixing bolts. The two ends of the reinforcing plate are respectively located on the upper and lower pile bodies.

[0009] By adopting the above technical solution, during assembly, the upper pile body is moved downwards, the protrusion is inserted into the circular groove, and then the upper pile body is rotated so that the protrusion enters the end of the arc-shaped groove. At this point, the edges of the upper and lower pile bodies are exactly aligned, forming a square pile. After completion, the reinforcing plate is fixed to the side groove with fixing bolts. The protrusion tightens and fixes the lower end plate, providing an anti-separation effect in the middle of the pile body; the reinforcing plate on the outer wall of the pile body provides anti-rotation and anti-separation effects. The combined effect of both further ensures the combined strength of the upper and lower pile bodies.

[0010] Optionally, the lower end plate is fixed with multiple fixing bars, the lower ends of which penetrate into the lower pile body.

[0011] By adopting the above technical solution, the connection strength between the lower end plate and the lower pile body is improved by fixing the reinforcing bars.

[0012] Optionally, the protrusion and the anchoring bar are integrally formed, and the bottom surface of the protrusion is a hemispherical surface.

[0013] By adopting the above technical solution, the protrusion and the anchoring bar are integrally formed to ensure strength, and the bottom surface of the hemispherical protrusion is easy to enter the circular groove.

[0014] Optionally, a metal threaded sleeve is inserted and fixed into the inner wall of the side groove, and the reinforcing plate has a fixing hole for the fixing bolt to pass through, and the fixing bolt is threadedly connected to the threaded sleeve.

[0015] By adopting the above technical solution, the internal thread strength and depth are ensured by using a metal threaded sleeve, thus ensuring the strength after threaded connection with the fixing bolt.

[0016] Optionally, the fixing hole is a countersunk hole.

[0017] By adopting the above technical solution, the fixing bolts are prevented from protruding from the outer wall of the reinforcing plate.

[0018] Optionally, the reinforcing plate is I-shaped, and the shape of the side groove corresponds to that of the reinforcing plate.

[0019] By adopting the above technical solution, the I-shaped reinforcing plate can prevent separation between the upper and lower pile bodies and play a role in sharing the stress.

[0020] Optionally, a steel plate layer is fixed to the inner wall of the side groove, and the reinforcing plate is in contact with the steel plate layer.

[0021] By adopting the above technical solution, the reinforcing plate does not come into direct contact with the pile body, but rather with the steel plate layer, thus avoiding scratches and peeling of the concrete pile body by the reinforcing plate.

[0022] Optionally, the steel plate layer is thickened at both sides corresponding to the ends of the reinforcing plate.

[0023] By adopting the above technical solution, the structural strength of the corresponding position of the steel plate layer is improved by thickening, and the steel plate layer is not easily deformed when the reinforcing plate is used as a tool to rotate the upper pile.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The lower end plate is tightened and fixed by the protrusion, which plays a role in preventing separation in the middle of the pile body; the reinforcing plate plays a role in preventing rotation and separation on the outer wall of the pile body. The two work together to further ensure the combined strength of the upper and lower pile bodies and avoid any form of relative movement.

[0026] 2. The installation process is convenient and quick, and the outer wall of the pile is flat and undamaged after installation. Attached Figure Description

[0027] Figure 1 This is a perspective view of a precast concrete square pile according to an embodiment;

[0028] Figure 2 This is a structural diagram of the end face of the upper and lower end plates in the embodiment;

[0029] Figure 3 This is a partial exploded view of an embodiment;

[0030] Figure 4 This is an assembly diagram of an embodiment.

[0031] Explanation of reference numerals in the attached drawings: 1. Upper pile body; 2. Lower pile body; 11. Upper end plate; 21. Lower end plate; 3. Side groove; 31. Fixing bolt; 4. Reinforcing plate; 12. Anchor bar; 13. Protrusion; 22. Installation groove; 23. Circular groove; 24. Arc groove; 25. Fixing bar; 32. Threaded sleeve; 41. Fixing hole; 33. Steel plate layer. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] Reference Figure 1 This embodiment discloses a precast concrete square pile, including an upper pile body 1 and a lower pile body 2. An upper end plate 11 is fixed to the bottom end of the upper pile body 1, and a lower end plate 21 is fixed to the top end of the lower pile body 2. Both the upper end plate 11 and the lower end plate 21 are steel plates. A communicating side groove 3 is opened on the outer side wall of the upper pile body 1 and the lower pile body 2. A reinforcing plate 4 is fixed in the side groove 3 by fixing bolts 31. The two ends of the reinforcing plate 4 are respectively located on the upper pile body 1 and the lower pile body 2.

[0034] Reference Figure 2Multiple anchor bars 12 are provided through the upper end plate 11. The anchor bars 12 are welded and fixed to the upper end plate 11. The upper end of the anchor bar 12 passes into the upper pile body 1, and the lower end of the anchor bar 12 is located outside the upper end plate 11 and is fixed with a protrusion 13. The protrusion 13 is integrally formed with the anchor bar 12 to ensure strength. The bottom surface of the protrusion 13 is hemispherical. In this embodiment, six anchor bars 12 are provided, and the six anchor bars 12 are distributed in a circular array around the center of the upper end plate 11.

[0035] The lower end plate 21 has mounting grooves 22 for the protrusions 13 to enter. The number and position of the mounting grooves 22 correspond to the protrusions 13. The mounting grooves 22 include circular grooves 23 for the protrusions 13 to enter and arc-shaped grooves 24 for the anchor bars 12 to slide. The arc-shaped grooves 24 are arc-shaped, and their centers are located at the center of the lower end plate 21. The arc-shaped grooves 24 are constricted grooves, preventing the protrusions 13 from passing through the opening of the arc-shaped grooves 24. The bottom surface of the hemispherical protrusions 13 facilitates entry into the circular grooves 23. After the protrusions 13 enter the circular grooves 23, they move along the arc-shaped grooves 24 to the end, thus locking the protrusions 13 and the mounting grooves 22. After locking, the upper end plate 11 and the lower end plate 21 are prevented from moving away from each other.

[0036] Multiple fixing bars 25 are welded to the lower end plate 21, and the lower ends of the fixing bars 25 are inserted into the lower pile body 2. The fixing bars 25 improve the connection strength between the lower end plate 21 and the lower pile body 2, and the anchoring bars 12 improve the connection strength between the upper end plate 11 and the upper pile body 1.

[0037] Reference Figure 3 The side grooves 3 and reinforcing plates 4 are symmetrically distributed on both sides of the pile body to ensure uniform stress distribution. A metal threaded sleeve 32 is inserted and fixed into the inner wall of the side groove 3. The reinforcing plate 4 has a fixing hole 41 for the fixing bolt 31 to pass through, and the fixing bolt 31 is threadedly connected to the threaded sleeve 32. The fixing hole 41 is a countersunk hole to prevent the fixing bolt 31 from protruding from the outer wall of the reinforcing plate 4. The threaded sleeve 32 is pre-embedded in the pile body, and the metal threaded sleeve 32 ensures sufficient strength and depth of the internal thread, guaranteeing the strength after threaded connection with the fixing bolt 31.

[0038] Both sides of the upper end plate 11 and the lower end plate 21 are provided with openings to avoid the reinforcing plate 4. The reinforcing plate 4 is I-shaped, and the shape of the side groove 3 corresponds to the reinforcing plate 4. A steel plate layer 33 is fixed to the inner wall of the side groove 3, and the reinforcing plate 4 is in contact with the steel plate layer 33. The reinforcing plate 4 is made of steel plate, and the steel plate layer 33 completely covers the inner wall of the side groove 3. The steel plate layer 33 is pre-welded to form an integrated structure. The reinforcing plate 4 does not directly contact the pile body, but contacts the steel plate layer 33, avoiding scratches and peeling of the concrete pile body by the reinforcing plate 4. After the I-shaped reinforcing plate 4 is installed, it can not only prevent relative rotation between the upper pile body 1 and the lower pile body 2, but also prevent separation between the upper pile body 1 and the lower pile body 2.

[0039] Reference Figure 3 and Figure 4 The steel plate layer 33 is thickened on both sides corresponding to the ends of the reinforcing plate 4, thereby increasing the structural strength of the corresponding positions of the steel plate layer 33. When assembling the upper pile body 1 and the lower pile body 2, the upper pile body 1 needs to be rotated. The end of the reinforcing plate 4 can be inserted between the thickened positions of the steel plate layer 33. At this time, the reinforcing plate 4 acts as a tool, and the upper pile body 1 is rotated by the reinforcing plate 4, which achieves a labor-saving effect through leverage.

[0040] The implementation principle of a precast concrete square pile according to an embodiment of this application is as follows: During assembly at the construction site, the upper pile body 1 is moved downwards, and the protrusion 13 is inserted into the circular groove 23. Then, the upper pile body 1 is rotated so that the protrusion 13 enters the end of the arc-shaped groove 24. At this time, the edge positions of the upper pile body 1 and the lower pile body 2 are exactly aligned, forming a square pile. If the resistance is too great and it is difficult to rotate the upper pile body 1 during rotation, the end of the reinforcing plate 4 can be inserted between the thickened positions of the steel plate layer 33 to apply force. After completion, the reinforcing plate 4 is fixed in the side groove 3 by fixing bolts 31.

[0041] This solution allows for convenient and quick installation, resulting in a smooth and undamaged outer wall of the upper pile after installation. The lower end plate 21 is tightened and fixed by the protrusion 13, preventing separation in the middle of the pile. The reinforcing plate 4 prevents rotation and separation on the outer wall of the pile. These two measures work together to further ensure the combined strength of the upper pile 1 and lower pile 2, preventing any form of relative movement.

[0042] It should be noted that all exposed metal parts have undergone rust prevention treatment, such as using stainless steel, applying rust-proof layers, or applying rust-proof paint after assembly.

[0043] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A precast concrete square pile, comprising an upper pile body (1) and a lower pile body (2), characterized in that: The bottom end of the upper pile body (1) is fixed with an upper end plate (11), and the top end of the lower pile body (2) is fixed with a lower end plate (21). Multiple anchor bars (12) are installed through the upper end plate (11). The anchor bars (12) are welded and fixed to the upper end plate (11). The upper end of the anchor bar (12) is inserted into the upper pile body (1), and the lower end of the anchor bar (12) is located outside the upper end plate (11) and is fixed with a protrusion (1). 3) The lower end plate (21) is provided with an installation groove (22) for the protrusion (13) to enter. The installation groove (22) includes a circular groove (23) for the protrusion (13) to enter and an arc groove (24) for the anchor bar (12) to slide. The center of the arc groove (24) is located at the center of the lower end plate (21). The arc groove (24) is a constricted groove. The protrusion (13) cannot pass through the opening of the arc groove (24). The outer side walls of the upper pile body (1) and the lower pile body (2) are provided with communicating side grooves (3). A reinforcing plate (4) is fixed in the side groove (3) by fixing bolts (31). The two ends of the reinforcing plate (4) are located on the upper pile body (1) and the lower pile body (2) respectively.

2. A precast concrete square pile according to claim 1, characterized in that: The lower end plate (21) is fixed with multiple fixing bars (25), and the lower ends of the fixing bars (25) are inserted into the lower pile body (2).

3. A precast concrete square pile according to claim 1, characterized in that: The protrusion (13) and the anchor bar (12) are integrally formed, and the bottom surface of the protrusion (13) is a hemispherical surface.

4. A precast concrete square pile according to claim 1, characterized in that: A metal sleeve (32) is inserted and fixed into the inner wall of the side groove (3). The reinforcing plate (4) has a fixing hole (41) for the fixing bolt (31) to pass through. The fixing bolt (31) is threadedly connected to the sleeve (32).

5. A precast concrete square pile according to claim 4, characterized in that: The fixing hole (41) is a countersunk hole.

6. A precast concrete square pile according to claim 1, characterized in that: The reinforcing plate (4) is I-shaped, and the shape of the side groove (3) corresponds to that of the reinforcing plate (4).

7. A precast concrete square pile according to claim 6, characterized in that: The inner wall of the side groove (3) is fixed with a steel plate layer (33), and the reinforcing plate (4) is in contact with the steel plate layer (33).

8. A precast concrete square pile according to claim 7, characterized in that: The steel plate layer (33) is thickened on both sides corresponding to the ends of the reinforcing plate (4).

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