Connecting structure of precast concrete piles

Abstract

The utility model relates to the technical field of concrete piles, in particular to a precast concrete pile connecting structure which comprises an upper pile and a lower pile, a plurality of pairs of connecting steel bars are fixed to the bottom end of the upper pile, each pair of connecting steel bars comprises a first connecting steel bar and a second connecting steel bar, connecting holes allowing the connecting steel bars to penetrate are formed in the lower pile, and horizontally-arranged connecting rods are fixed in the connecting holes. An embedding groove allowing the connecting rod to be embedded is formed in the side, facing the second connecting steel bar, of the first connecting steel bar, a threaded sleeve is fixedly embedded in the outer wall of the lower pile, a fixing bolt is in threaded connection with the interior of the threaded sleeve, and the end of the fixing bolt abuts against the first connecting steel bar. According to the connecting structure of the precast concrete piles, assembling of the upper pile and the lower pile can be conveniently completed; a steel bar structure in the concrete pile is used as a connecting medium, so that the connecting strength is high; and after assembly is completed, the connecting structure cannot protrude out of the outer wall of the concrete pile, the concrete pile is not prone to being clamped when placed in a foundation pit, and the foundation pit with the large diameter does not need to be dug.

Description

Technical Field

[0001] The present application relates to the technical field of concrete piles, and in particular to a connection structure of precast concrete piles. Background Art

[0002] In construction projects, when pile foundations are constructed, precast concrete piles are commonly used pile foundation structures. However, for deeper pile foundations, multiple groups of precast concrete piles need to be combined and connected. Generally, the connection methods of concrete piles are welding or screw-locking. The screw-locking connection of concrete piles uses screws and plug pins on the upper pile head and locking plates on the lower pile head. The plug pins of the upper pile head are inserted into the locking plates of the lower pile head for combination.

[0003] The utility model patent with the existing announcement number CN212358321U discloses a connection structure for concrete foundation piles, including a No. 1 steel bar and a No. 2 steel bar, one end of the No. 1 steel bar and the No. 2 steel bar are respectively fixedly connected with a second connection piece and a first connection piece, a connection pipe is arranged between the first connection piece and the second connection piece, and the two ends of the connection pipe are respectively fixedly connected with the first connection piece and the second connection piece by fastening bolts. By adjusting the tightness of the fastening bolts, the position adjustment between the first connection piece and the second connection piece and the No. 2 steel bar and the No. 1 steel bar is achieved.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the above-mentioned fixing structure protrudes from the outer wall of the concrete pile, causing the concrete pile to be easily stuck when placed in the foundation pit, and a foundation pit with a larger diameter must be dug to place the entire pile, which needs to be improved. Utility Model Content

[0005] The present application provides a connection structure for precast concrete piles, in which the fixing structure does not protrude from the outer wall of the concrete piles, the concrete piles are not easily stuck when placed in a foundation pit, and there is no need to dig a foundation pit with a larger diameter.

[0006] The present application provides a connection structure of precast concrete piles, which adopts the following technical solution:

[0007] A connection structure of a precast concrete pile comprises an upper pile and a lower pile, wherein a plurality of pairs of connecting steel bars are fixed to the bottom end of the upper pile, each pair of connecting steel bars comprises connecting steel bar 1 and connecting steel bar 2, the connecting steel bars 1 and connecting steel bar 2 are arranged closely, the lower pile is provided with a connecting hole for the connecting steel bar to pass through, a horizontally arranged connecting rod is fixed in the connecting hole, a side of the connecting steel bar 1 facing the connecting steel bar 2 is provided with an embedding groove for the connecting rod to be embedded, a threaded sleeve is embedded and fixed to the outer wall of the lower pile, a fixing bolt is threadedly connected to the inner thread of the threaded sleeve, and an end of the fixing bolt abuts against a side of the connecting steel bar 1 away from the embedding groove.

[0008] By adopting the above technical solution, when assembling the upper pile and the lower pile, the upper pile and the lower pile are brought closer to each other, so that each pair of connecting steel bars is inserted into the corresponding connecting hole, and then moved to a position where the groove of the first connecting steel bar just sleeved outside the connecting rod to complete the positioning. Then the operator tightens the fixing bolt, so that the first connecting steel bar is pressed against the connecting rod through the groove, which has the effect of restricting the movement of the first connecting steel bar along the connecting hole, thereby restricting the separation of the upper pile and the lower pile. After the assembly is completed, the connecting structure will not protrude from the outer wall of the concrete pile, and the concrete pile is not easy to get stuck when being placed in the foundation pit, nor is it necessary to dig a foundation pit with a larger diameter.

[0009] Optionally, a countersunk hole for embedding the wrench head of the fixing bolt is provided on the threaded sleeve.

[0010] By adopting the above technical solution, the countersunk hole prevents the wrench head of the fixing bolt from protruding from the outer wall of the lower pile, so that the fixing bolt will not affect the process of lowering the lower pile in the foundation pit.

[0011] Optionally, the groove is a rectangular groove, and the upper and lower walls of the groove are horizontal planes.

[0012] By adopting the above technical solution, no lateral component force will be generated when the upper and lower walls of the groove are pressed against the connecting rod. Therefore, no force will be generated to drive the first connecting steel bar and the second connecting steel bar to move away from each other, so that the first connecting steel bar and the second connecting steel bar remain in a fitting state, improving the stability.

[0013] Optionally, inclined guiding surfaces are provided on the sides where the bottoms of the first connecting steel bar and the second connecting steel bar face each other.

[0014] By adopting the above technical solution, during the combination process of the upper pile and the lower pile, after the connecting steel bars are inserted into the connecting holes, the first connecting steel bar and the second connecting steel bar abut against the connecting rod through the guiding surfaces, and then through the guiding action of the guiding surfaces, the first connecting steel bar and the second connecting steel bar move away from each other, facilitating the entry of the connecting rod between the first connecting steel bar and the second connecting steel bar and improving the assembly efficiency.

[0015] Optionally, a steel bar framework is fixed inside the upper pile, and the steel bar framework includes several longitudinal steel bars and several annular transverse steel bars.

[0016] By adopting the above technical solution, the steel bar framework plays a role in strengthening the structural strength inside the concrete pile.

[0017] Optionally, the first connecting steel bar and the second connecting steel bar are integrally formed with the longitudinal steel bar, and the first connecting steel bar and the second connecting steel bar are formed by bifurcating from the lower end of the longitudinal steel bar.

[0018] By adopting the above technical solution, the bifurcated structure is made by cutting. Since the connecting steel bar is integrally formed with the longitudinal steel bar, the manufacturing and processing are simple, and it is not easy to break.

[0019] Optionally, fixing holes for installing the threaded sleeves are formed in the outer wall of the lower pile, and sealing caps are arranged at the orifices of the fixing holes.

[0020] By adopting the above technical solution, the sealing cap closes the orifice of the fixing hole, preventing the threaded sleeve and the fixing bolt from rusting when encountering water.

[0021] Optionally, positioning columns are fixed on the top surface of the lower pile, and positioning holes for inserting the positioning columns are formed in the bottom surface of the upper pile.

[0022] By adopting the above technical solution, the assembled upper pile and lower pile are positioned by inserting the positioning columns into the positioning holes, and relative rotation between the two is restricted.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Through the connection structure of the precast concrete pile of the present application, the assembly of the upper pile and the lower pile can be conveniently completed; the steel bar structure inside the concrete pile is used as the connection medium, so the connection strength is relatively high;

[0025] 2. After the assembly is completed, the connection structure will not protrude from the outer wall of the concrete pile. When the concrete pile is placed in the foundation pit, it is not easy to get stuck, and there is no need to dig a foundation pit with a larger diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of a connection structure of a precast concrete pile according to an embodiment;

[0027] Figure 2 is a front sectional view of the embodiment;

[0028] Figure 3 is a perspective view of the upper pile and the connecting steel bars of the embodiment;

[0029] Figure 4 is a top sectional view of the fixing bolt of the embodiment;

[0030] Figure 5 is Figure 2 an enlarged view of part A of

[0031] Description of the reference numerals: 1. Upper pile; 2. Lower pile; 21. Positioning column; 11. Positioning hole; 12. Steel bar frame; 13. Longitudinal steel bar; 3. Connecting steel bar one; 4. Connecting steel bar two; 22. Connecting hole; 23. Connecting rod; 31. Groove; 32. Guide surface; 5. Threaded sleeve; 24. Fixing hole; 51. Fixing bolt; 52. Countersunk head hole; 53. Sealing cap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following further describes the present application in detail with reference to the accompanying drawings.

[0033] Reference Figures 1 to 3 In this embodiment, a connecting structure for precast concrete piles is disclosed, which includes an upper pile 1 and a lower pile 2. A positioning column 21 is fixed on the top surface of the lower pile 2, and a positioning hole 11 for inserting the positioning column 21 is provided on the bottom surface of the upper pile 1. Both the positioning column 21 and the positioning hole 11 are rectangular. The assembled upper pile 1 and lower pile 2 are positioned by inserting the positioning column 21 into the positioning hole 11, and relative rotation between the two is restricted.

[0034] A steel bar framework 12 is fixed inside the upper pile 1. The steel bar framework 12 includes a number of longitudinal steel bars 13 and a number of annular transverse steel bars. The steel bar framework 12 plays a role in strengthening the structural strength inside the upper pile 1. A steel bar framework 12 (not shown in the figure) is also fixed inside the lower pile 2.

[0035] Reference Figure 3 As shown, a number of pairs of connecting steel bars are fixed at the bottom end of the upper pile 1. Each pair of connecting steel bars is evenly distributed along the circumferential direction of the upper pile 1. Each pair of connecting steel bars includes a connecting steel bar one 3 and a connecting steel bar two 4, and the connecting steel bar one 3 and the connecting steel bar two 4 are arranged closely. The connecting steel bar one 3 and the connecting steel bar two 4 are integrally formed with the longitudinal steel bar 13. The connecting steel bar one 3 and the connecting steel bar two 4 are formed by bifurcating from the lower end of the longitudinal steel bar 13, and this bifurcating structure is made by cutting. Since the connecting steel bars are integrally formed with the longitudinal steel bar 13, the manufacturing and processing are simple and it is not easy to break.

[0036] Reference Figure 4 and Figure 5 As shown, the lower pile 2 is provided with connecting holes 22 for the connecting steel bars to pass through. The connecting holes 22 are waist-shaped holes. There is a space for the connecting steel bar one 3 to swing in the connecting hole 22. A horizontally arranged connecting rod 23 is fixed in the connecting hole 22. Both ends of the connecting rod 23 penetrate into the lower pile 2 and are fixed to the lower pile 2. An embedding groove 31 for embedding the connecting rod 23 is provided on the side of the connecting steel bar one 3 facing the connecting steel bar two 4. Both sides of the connecting steel bar two 4 are in contact with the connecting rod 23 and the hole wall of the connecting hole 22 respectively, and the connecting steel bar two 4 is restricted from swinging. The embedding groove 31 is a rectangular groove, and the upper and lower walls of the embedding groove 31 are horizontal planes. With this shape setting of the embedding groove 31, no lateral component force will be generated when the upper and lower walls of the embedding groove 31 are pressed against the connecting rod 23. Therefore, there will be no force driving the connecting steel bar one 3 and the connecting steel bar two 4 to move away from each other, keeping the connecting steel bar one 3 and the connecting steel bar two 4 in a fitting state and improving the stability.

[0037] Reference Figure 2 and Figure 3The bottom ends of the connecting steel bars 1 3 and 2 4 are opposite to each other and are provided with an inclined guide surface 32. During the assembly process of the upper pile 1 and the lower pile 2, after the connecting steel bars are inserted into the connection holes 22, the connecting steel bars 1 3 and 2 4 abut against the connecting rod 23 through the guide surface 32, and then the connecting steel bars 1 3 and 2 4 are moved away from each other by the guiding effect of the guide surface 32, so that the connecting rod 23 can enter between the connecting steel bars 1 3 and 2 4, thereby improving the assembly efficiency.

[0038] Reference Figure 4 and Figure 5 The outer wall of the lower pile 2 is embedded with a threaded sleeve 5, and a fixing hole 24 for installing the threaded sleeve 5 is provided on the outer wall of the lower pile 2. The height position of the threaded sleeve 5 corresponds to the embedding groove 31. The threaded sleeve 5 is internally threaded with a fixing bolt 51, and the end of the fixing bolt 51 abuts against the side of the connecting steel bar 3 away from the embedding groove 31. Concrete is a brittle material and is not suitable for setting threads. The threaded sleeve 5 is made of metal, and the threaded sleeve 5 can avoid setting threads on the lower pile 2. By tightening the fixing bolt 51, the connecting steel bar 3 is pressed against the connecting rod 23 through the embedding groove 31, and the connecting steel bar 24 supports the back side of the connecting rod 23 to prevent the connecting rod 23 from being deformed by compression, thereby limiting the movement of the connecting steel bar 3 along the connecting hole 22.

[0039] The threaded sleeve 5 is provided with a countersunk hole 52 for the screw head of the fixing bolt 51 to be inserted, and a sealing cover 53 is provided at the opening of the fixing hole 24. The countersunk hole 52 prevents the screw head of the fixing bolt 51 from protruding from the outer wall of the lower pile 2, so that the fixing bolt 51 will not affect the lowering process of the pile 2 in the foundation pit. The sealing cover 53 is made of plastic or rubber, and the sealing cover 53 seals the opening of the fixing hole 24 to prevent the threaded sleeve 5 and the fixing bolt 51 from rusting when they come into contact with water.

[0040] The implementation principle of the connection structure of a precast concrete pile in an embodiment of the present application is: when the upper pile 1 and the lower pile 2 need to be assembled, the upper pile 1 and the lower pile 2 are brought close to each other, so that each pair of connecting steel bars are inserted into the corresponding connecting holes 22, and as the connecting steel bars penetrate deeper into the connecting holes 22, the connecting steel bars abut against the connecting rod 23 through the guide surface 32, and the connecting steel bars 1 3 and the connecting steel bars 2 4 are separated, so that the connecting rod 23 enters between the connecting steel bars 1 3 and the connecting steel bars 2 4.

[0041] As the upper pile 1 and the lower pile 2 continue to approach, the positioning column 21 is inserted into the positioning hole 11, and the upper pile 1 and the lower pile 2 are butted against each other by their ends. At this time, the embedded groove 31 of the connecting steel bar 3 is just sleeved on the outside of the connecting rod 23, and the positioning is completed. Then the personnel tighten the fixing bolt 51, so that the connecting steel bar 3 is pressed against the connecting rod 23 through the embedded groove 31, which has the effect of limiting the movement of the connecting steel bar 3 along the connecting hole 22, thereby limiting the separation of the upper pile 1 and the lower pile 2, and after the sealing cover 53 is plugged into the fixing hole 24, the assembly is completed.

[0042] Through the connection structure of this precast concrete pile, the upper pile 1 and the lower pile 2 can be assembled conveniently; the steel bar structure inside the concrete pile is used as the connection medium, so the connection strength is relatively high. After the assembly is completed, the connection structure will not protrude from the outer wall of the concrete pile, and the concrete pile is not easy to get stuck when placed in the foundation pit, nor is it necessary to dig a foundation pit with a larger diameter.

[0043] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A connection structure of precast concrete piles, comprising an upper pile (1) and a lower pile (2), characterized in that: A plurality of pairs of connecting steel bars are fixed to the bottom end of the upper pile (1), each pair of connecting steel bars comprising a connecting steel bar 1 (3) and a connecting steel bar 2 (4), the connecting steel bars 1 (3) and the connecting steel bars 2 (4) being arranged closely together, the lower pile (2) is provided with a connecting hole (22) for the connecting steel bars to pass through, a horizontally arranged connecting rod (23) is fixed in the connecting hole (22), the connecting steel bar 1 (3) is provided with a groove (31) for the connecting rod (23) to be embedded on a side facing the connecting steel bar 2 (4), a threaded sleeve (5) is embedded and fixed on the outer wall of the lower pile (2), the threaded sleeve (5) is internally threadedly connected with a fixing bolt (51), the end of the fixing bolt (51) abuts against a side of the connecting steel bar 1 (3) away from the groove (31).

2. The connection structure of a precast concrete pile according to claim 1, characterized in that: The threaded sleeve (5) is provided with a countersunk hole (52) for the screw head of the fixing bolt (51) to be inserted.

3. The connection structure of a precast concrete pile according to claim 1, characterized in that: The embedding groove (31) is a rectangular groove, and the upper and lower walls of the embedding groove (31) are horizontal planes.

4. The connection structure of a precast concrete pile according to claim 1, characterized in that: An inclined guide surface (32) is provided on one side of the bottom ends of the connecting steel bar 1 (3) and the connecting steel bar 2 (4) facing each other.

5. The connection structure of a precast concrete pile according to claim 1, characterized in that: A steel bar frame (12) is fixed inside the upper pile (1), and the steel bar frame (12) comprises a plurality of longitudinal steel bars (13) and a plurality of annular transverse steel bars.

6. The connection structure of a precast concrete pile according to claim 5, characterized in that: The connecting steel bar one (3), the connecting steel bar two (4) and the longitudinal steel bar (13) are integrally formed, and the connecting steel bar one (3) and the connecting steel bar two (4) are formed by bifurcating the lower ends of the longitudinal steel bars (13).

7. The connection structure of a precast concrete pile according to claim 1, characterized in that: The outer wall of the lower pile (2) is provided with a fixing hole (24) for installing the threaded sleeve (5), and the opening of the fixing hole (24) is provided with a sealing cover (53).

8. The connection structure of a precast concrete pile according to claim 1, characterized in that: A positioning column (21) is fixed on the top surface of the lower pile (2), and a positioning hole (11) for the positioning column (21) to be inserted is provided on the bottom surface of the upper pile (1).

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