A concrete precast pipe pile connecting device

Abstract

The utility model discloses a kind of concrete prefabricated pipe pile connecting devices, belong to building technical field.It is installed between upper section pile and lower section pile, including end plate and limit ring, the end plate is located below limit ring and concentrically arranged with limit ring, the bottom of the end plate is distributed with not less than three pre-tightening branch in circumferential direction, the limit ring is slidably connected with pre-tightening branch upside and downside;The pre-tightening branch has pre-tightening force distributed along radial direction and top is resisting end, the resisting end is protruding from the outer circumferential wall of end plate when pre-tightening branch free state;A kind of concrete prefabricated pipe pile connecting device of the utility model solves the end plate deviation, make the stress state of pipe pile connecting place become complex and uneven, and reduce the technical problem of the reliability of pipe pile connection and the overall bearing capacity of pile foundation.

Description

Technical Field

[0001] This utility model relates to the field of building technology, specifically to a precast concrete pipe pile connection device. Background Technology

[0002] In the modern construction field, precast concrete pipe piles are widely used in the foundation construction of various building projects due to their numerous advantages, such as fast construction speed, high load-bearing capacity, and environmental friendliness and energy saving. Currently, the commonly used traditional connection methods for precast concrete pipe piles mainly include welding and mechanical connection. Welding is a relatively common method. During construction, the end plates of the upper and lower pipe piles are first aligned, and symmetrical spot welding is performed along the perimeter of the bevel. After the upper and lower pile sections are fixed, two welders use manual arc welding to perform symmetrical full welding along the perimeter of the end plates, forming a single unit from the upper and lower pipe piles. This method has been widely used in pipe pile connections in the past, and its operation is relatively simple and the cost is relatively controllable.

[0003] In traditional pipe pile connection methods, the end plates of the pipe piles are prone to displacement. In actual engineering projects, the external forces borne by the pipe piles are complex and variable. Even with improved technologies, over long-term use, due to the combined effects of various factors, the end plates of the pipe piles may still shift to varying degrees, affecting the stability of the pile foundation and the safety of the building. Once the end plates shift, the stress state at the pipe pile connection becomes complex and uneven, reducing the reliability of the pipe pile connection and the overall bearing capacity of the pile foundation.

[0004] Therefore, it is necessary to provide a precast concrete pipe pile connection device to solve the above problems. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the purpose of this utility model is to provide a precast concrete pipe pile connection device to solve the problems mentioned in the background technology.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a precast concrete pipe pile connection device, installed between the upper and lower pile sections, including an end plate and a limiting ring. The end plate is located below the limiting ring and is concentric with the limiting ring. The bottom of the end plate is distributed with no less than three pre-tightening branches along the circumferential direction. The limiting ring and the pre-tightening branches are slidably connected up and down. The pre-tightening branch has a pre-tightening force distributed in the radial direction and a supporting end at the top. The supporting end protrudes from the outer peripheral wall of the end plate when the pre-tightening branch is in a free state.

[0007] Furthermore, a detachable rubber layer is fixedly connected to the outer end face of the supporting end.

[0008] Furthermore, the rubber layer is covered with teeth, which are fixedly connected to the outer end face of the abutment end.

[0009] Furthermore, the root of the pre-tightened branch is a vertical nested portion.

[0010] Furthermore, the inner peripheral wall of the limiting ring is a sliding part, and the cross-sectional area of ​​the sliding part is circular arc.

[0011] Furthermore, the upper end face of the end plate has an end plate sealing ring, and the lower end face has a lower sealing ring; The upper end face of the limiting ring has an upper sealing ring.

[0012] The beneficial effects of this utility model are as follows: The precast concrete pipe pile connection device provided by this utility model, by setting a pre-tightening branch, ensures that after the upper and lower pile sections are positioned, the teeth are subjected to a pre-tightening force and are locked onto the inner wall of the upper pile section, so that the end plate will not easily shift. At the same time, it can play a guiding role when connecting pipe piles, improving the connection efficiency. During long-term use, the teeth are always locked onto the inner wall of the upper pile section, which improves the stability of the end plate and avoids the end plate shifting, which would make the stress state at the pipe pile connection complex and uneven, and reduce the reliability of the pipe pile connection and the overall bearing capacity of the pile foundation.

[0013] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram showing the connection between the end plate and the limiting ring of this utility model; Figure 3 This is a schematic diagram of the end plate of this utility model; Figure 4 This is a schematic diagram of the limiting ring of this utility model; Figure 5 This is a cross-sectional schematic diagram of the connecting device of this utility model; Figure 6 For the present utility model Figure 5 Enlarged diagram of area A in the middle; Figure 7 This is a schematic cross-sectional view of the present invention; Figure 8For the present utility model Figure 7 Enlarged diagram of area B in the middle; The following are the labeling elements in the figure: 1. Upper pile section; 2. Lower pile section; 3. End plate; 31. Pre-tightening branch; 311. Supporting end; 312. Rubber layer; 313. Nesting part; 314. Teeth; 4. Restriction ring; 41. Sliding part; 5. End plate sealing ring; 6. Upper sealing ring; 7. Lower sealing ring. Detailed Implementation

[0015] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0017] like Figure 1-8 As shown, this utility model provides a technical solution: a precast concrete pipe pile connection device, installed between an upper pile 1 and a lower pile 2, including an end plate 3 and a limiting ring 4. The end plate 3 is located below the limiting ring 4 and is concentrically arranged with the limiting ring 4. The bottom of the end plate 3 has at least three pre-tightening branches 31 distributed along the circumferential direction. The limiting ring 4 is slidably connected to the pre-tightening branches 31. The pre-tightening branch 31 has a pre-tightening force distributed in the radial direction and its top is a holding end 311. When the pre-tightening branch 31 is in a free state, the holding end 311 protrudes from the outer peripheral wall of the end plate 3.

[0018] A detachable rubber layer 312 is fixedly connected to the outer end face of the supporting end 311.

[0019] The rubber layer 312 is covered with teeth 314, which are fixedly connected to the outer end face of the abutment end 311.

[0020] The root of the pre-tightening branch 31 is a vertical nested part 313.

[0021] The inner peripheral wall of the limiting ring 4 is a sliding part 41, and the cross-sectional area of ​​the sliding part 41 is circular arc.

[0022] The upper end face of the end plate 3 has an end plate sealing ring 5, and the lower end face has a lower sealing ring 7; The upper end face of the limiting ring 4 has an upper sealing ring 6.

[0023] In one embodiment, the connecting device is installed between the upper pile 1 and the lower pile 2.

[0024] Specifically, the supporting end 311 is contracted towards the center, and the limiting ring 4 is fitted onto the pre-tightening branch 31, so that the upper surface of the limiting ring 4 contacts the lower surface of the supporting end 311. Under the action of the pre-tightening force, the middle part of the pre-tightening branch 31 extends in the radial direction. Place the end plate 3 on top of the lower pile 2, and seal the end plate 3 with the lower pile 2 with the lower sealing ring 7. Align the hollow part at the bottom of the upper pile 1 with the pre-tightening branch 31, and slowly move the upper pile 1 downward. The pile body of the upper pile 1 contacts the upper surface of the limiting ring 4, which in turn moves the limiting ring 4 downward. At this time, the sliding part 41 slides downward on the surface of the pre-tightening branch 31. When the upper pile 1 drives the limiting ring 4 to push onto the end plate 3, the limiting ring 4 is located on the nesting part 313 and does not apply force to the pre-tightening branch 31. The sealing is achieved through the end plate sealing ring 5, the end plate 3 and the limiting ring 4, and through the upper sealing ring 6, the bottom of the upper pile 1 and the limiting ring 4. During the descent of the upper pile 1, the limiting ring 4 gradually moves downward, the force of the pre-tightening branch 31 is gradually released, and the supporting end 311 moves outward in the radial direction until the rubber layer 312 contacts the inner wall of the upper pile 1. After being rubbed by the inner wall of the upper pile 1, the rubber layer 312 gradually detaches from the supporting end 311. When the upper pile 1 moves to the lower limit position, the rubber layer 312 has detached from the supporting end 311. At this time, the tooth 314 is exposed, and the tooth tip of the tooth 314 is pressed against the inner wall of the upper pile 1. At the same time, the pre-tightening force of the pre-tightening branch 31 applies pressure to the tooth 314. After positioning, the upper pile 1, end plate 3, limiting ring 4 and lower pile 2 are welded together, thus completing the connection of the precast pipe piles.

[0025] In summary, this device, by incorporating a pre-tightening branch 31, ensures that after the upper pile 1 and lower pile 2 are positioned, the teeth 314 are subjected to a pre-tightening force and locked onto the inner wall of the upper pile 1. This prevents the end plate 3 from easily shifting. Furthermore, it acts as a guide during the connection between pipe piles, improving connection efficiency. During long-term use, the teeth 314 remain locked onto the inner wall of the upper pile 1, enhancing the stability of the end plate 3 and preventing it from shifting. This prevents the stress state at the pipe pile connection from becoming complex and uneven, thus reducing the reliability of the pipe pile connection and the overall bearing capacity of the pile foundation.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A precast concrete pipe pile connection device, installed between an upper pile section (1) and a lower pile section (2), characterized in that: Includes an end plate (3) and a limiting ring (4). The end plate (3) is located below the limiting ring (4) and is concentric with the limiting ring (4). The bottom of the end plate (3) has at least three pre-tightening branches (31) distributed along the circumferential direction. The limiting ring (4) and the pre-tightening branches (31) are slidably connected vertically. The pre-tightening branch (31) has a pre-tightening force distributed in the radial direction and a supporting end (311) at the top. The supporting end (311) protrudes from the outer peripheral wall of the end plate (3) when the pre-tightening branch (31) is in a free state.

2. The precast concrete pipe pile connection device according to claim 1, characterized in that: A detachable rubber layer (312) is fixedly connected to the outer end face of the abutment end (311).

3. The precast concrete pipe pile connection device according to claim 2, characterized in that: The rubber layer (312) is covered with teeth (314), and the teeth (314) are fixedly connected to the outer end face of the abutment end (311).

4. The precast concrete pipe pile connection device according to claim 1, characterized in that: The root of the pre-tightening branch (31) is a vertical nested part (313).

5. The precast concrete pipe pile connection device according to claim 1, characterized in that: The inner peripheral wall of the limiting ring (4) is a sliding part (41), and the cross-sectional area of ​​the sliding part (41) is circular arc.

6. The precast concrete pipe pile connection device according to claim 1, characterized in that: The upper end face of the end plate (3) has an end plate sealing ring (5), and the lower end face has a lower sealing ring (7). The upper end face of the limiting ring (4) has an upper sealing ring (6).

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