A pile structure for reinforcing frozen soil roadbed

Abstract

This utility model discloses a frozen soil subgrade reinforcement pile structure, including a pile head, a pile rod above the pile head, a retaining component on the outside of the pile rod, a pile tail at the end of the pile rod away from the pile head, a closing ring installed on the pile tail, and an inlet pipe and an outlet pipe respectively installed on the pile tail. In this frozen soil subgrade reinforcement pile structure, coarse sand can automatically fill the gaps around the steel pipe pile body. The pile is formed by hammering, and the coarse sand between the retaining component and the pile rod can be vibrated to compact it, ultimately improving the density of the coarse sand around the pile after pile formation. The coarse sand pressing on the annular area around the pile body can also improve the overall pull-out resistance of the steel pipe pile. Simultaneously, a liquid medium can be introduced through the inlet pipe, filling the first and second pipe bodies. In low temperatures, a high-temperature liquid medium is used; in high temperatures, a low-temperature liquid medium is used, preventing the soil temperature around the pile body from becoming excessively high or low, thus preventing changes in the stability of the subgrade.

Description

Technical Field

[0001] This utility model relates to the field of roadbed reinforcement technology, specifically a frozen soil roadbed reinforcement pile structure. Background Technology

[0002] High-altitude mountain sites are flat, open, with little obstruction and ample sunshine, making them suitable for photovoltaic projects. However, high-altitude mountain climates are cold and have high rainfall. Some sites are located on gentle slopes with high groundwater levels, resulting in significant frost heave. The main forms of permafrost damage at these sites include frost heave mounds, thaw sinkholes, frost-thaw grass mounds, and permafrost cracks.

[0003] During the freezing and thawing process, frozen soil foundations often experience frost heave and thaw settlement. Excessive freeze-thaw deformation can cause serious damage to buildings. When the foundation piles are embedded deeper than the freezing depth, tangential frost heave forces act on the sides of the foundation piles. When the foundation piles are embedded shallower than the freezing depth, normal frost heave also acts on the bottom surface of the foundation piles, thus affecting the structural stability of the piles and the stability of the roadbed.

[0004] To address the aforementioned issues, an innovative design was developed based on the existing reinforcement piles. Utility Model Content

[0005] The purpose of this utility model is to provide a pile structure for reinforcing frozen soil subgrade, so as to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a frozen soil roadbed reinforcement pile structure, including a pile head, a pile rod above the pile head, a retaining component on the outside of the pile rod, a pile tail at the end of the pile rod away from the pile head, a closing ring installed on the pile tail, an inlet pipe and an outlet pipe respectively installed on the pile tail, and a first pipe body and a second pipe body respectively connected to the end of the inlet pipe and the outlet pipe extending into the pile rod, and a connecting pipe installed between the first pipe body and the second pipe body.

[0007] Preferably, the enclosure assembly includes a docking ring, multiple vertical rods, and multiple ring bodies. The docking ring, vertical rods, and ring bodies are all located outside the pile rod. The docking ring is detachably connected to the pile tail. The multiple vertical rods are arranged between the docking ring and the pile head along the axial direction of the pile rod. The multiple ring bodies are arranged sequentially at intervals along the axial direction of the pile rod, and the ring bodies are connected and fixed to the vertical rods.

[0008] Preferably, the vertical rods are evenly distributed at equal angles between the connecting ring and the pile head, and the rings are evenly distributed on the vertical rods.

[0009] Preferably, the vertical rod and the ring body form a cage-like structure.

[0010] Preferably, the surface of the mating ring is provided with a first mating thread that matches the inner wall of the closed ring, and the surface of the pile tail is provided with a second mating thread that matches the inner wall of the closed ring.

[0011] Preferably, the closing ring is connected to the docking ring and the pile tail thread through the first docking thread and the second docking thread, respectively.

[0012] Preferably, both the first and second pipes have a spiral structure, and the first and second pipes are located inside the pile rod.

[0013] Preferably, the pile head (1), pile rod (2) and pile tail (7) are arranged along the same central axis.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: This frozen soil subgrade reinforcement pile structure can insert coarse sand between the retaining components and the pile rod. The coarse sand can automatically fill the gaps around the steel pipe pile body. The pile is formed by hammering, and during the hammering process, the coarse sand between the retaining components and the pile rod can also be vibrated and compacted, ultimately improving the density of the coarse sand around the pile after pile formation. The coarse sand pressed on the annular area around the pile body can also improve the overall pull-out resistance of the steel pipe pile. At the same time, a liquid medium can be introduced through the inlet pipe, allowing the liquid medium to fill the first and second pipe bodies. When the temperature is low, a high-temperature liquid medium is used; when the temperature is high, a low-temperature liquid medium is used, preventing the soil temperature around the pile body from becoming too high or excessive, thus preventing changes in the stability of the subgrade. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a frozen soil roadbed reinforcement pile structure according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the first and second mating threads according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of a pile structure according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the enclosure component structure according to an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the first and second tubes according to an embodiment of the present invention.

[0020] In the diagram: 1. Pile head; 2. Pile rod; 3. Connecting ring; 4. First connecting thread; 5. Vertical rod; 6. Ring body; 7. Pile tail; 8. Second connecting thread; 9. Closing ring; 10. Inlet pipe; 11. Outlet pipe; 12. First pipe body; 13. Second pipe body; 14. Connecting pipe. Detailed Implementation

[0021] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 This utility model provides a pile structure for reinforcing frozen soil subgrade, including a pile head 1, a pile rod 2 above the pile head 1, a retaining component on the outside of the pile rod 2, a pile tail 7 at the end of the pile rod 2 away from the pile head 1, a closing ring 9 installed on the pile tail 7, an inlet pipe 10 and an outlet pipe 11 respectively installed on the pile tail 7, and a first pipe body 12 and a second pipe body 13 respectively connected to the end of the inlet pipe 10 and the outlet pipe 11 extending into the pile rod 2, and a connecting pipe 14 installed between the first pipe body 12 and the second pipe body 13.

[0023] In one or more embodiments of this utility model, the enclosure component includes a docking ring 3, a plurality of vertical rods 5, and a plurality of ring bodies 6. The docking ring 3, vertical rods 5, and ring bodies 6 are all located outside the pile rod 2. The enclosure component formed by the docking ring 3, vertical rods 5, and ring bodies 6 forms a gap with the pile rod 2, which is conducive to subsequent filling. The docking ring 3 is detachably connected to the pile tail 7. The plurality of vertical rods 5 are arranged between the docking ring 3 and the pile head 1 along the axial direction of the pile rod 2. The plurality of ring bodies 6 are arranged sequentially at intervals along the axial direction of the pile rod 2, and the ring bodies 6 are connected and fixed to the vertical rods 5.

[0024] In one or more embodiments of this utility model, the vertical rods 5 are evenly distributed at equal angles between the connecting ring 3 and the pile head 1, and the rings 6 are evenly distributed on the vertical rods 5. The vertical rods 5 and the rings 6 form a cage-like structure, which is beneficial for filling the cage with coarse sand and improving the stability of the pile.

[0025] In one or more embodiments of this utility model, the surface of the docking ring 3 is provided with a first docking thread 4 that matches the inner wall of the closing ring 9, and the surface of the pile tail 7 is provided with a second docking thread 8 that matches the inner wall of the closing ring 9. The closing ring 9 is threadedly connected to the docking ring 3 and the pile tail 7 through the first docking thread 4 and the second docking thread 8, respectively. This facilitates the movement of the closing ring 9 on the pile tail 7 by screwing it on the thread, thereby making it easier for the closing ring 9 to close the opening position of the enclosure component.

[0026] In one or more embodiments of this utility model, the first tube 12 and the second tube 13 are both spiral structures. The first tube 12 and the second tube 13 are located inside the pile rod 2. The liquid medium is filled into the first tube 12 and the second tube 13. The spiral shape of the first tube 12 and the second tube 13 can increase the contact area between them and the pile rod 2. When the temperature is low, a high-temperature liquid medium is filled in, and when the temperature is high, a low-temperature liquid medium is filled in, so as to avoid the soil temperature around the pile being too high or excessive, and to prevent the stability of the roadbed from changing.

[0027] In one or more embodiments of this utility model, the pile head 1, pile rod 2 and pile tail 7 are arranged along the same central axis, which can improve the force distribution during hammering.

[0028] according to Figures 1-5 As shown, during use, coarse sand is first inserted between the retaining assembly formed by the connecting ring 3, the vertical rod 5, and the ring body 6 and the pile rod 2. Then, the closing ring 9 is pushed to move on the pile tail 7 until the end of the closing ring 9 near the connecting ring 3 is screwed onto the first connecting thread 4. At this time, the opening of the retaining assembly is closed, and the coarse sand can automatically fill the gaps around the pile body. The pile is formed by hammering. During the hammering process, the coarse sand between the retaining assembly and the pile rod 2 can also be vibrated and compacted, ultimately improving the compactness of the coarse sand around the pile after pile formation. The coarse sand pressed on the annular part around the pile rod 2 can also improve the overall pull-out resistance of the steel pipe pile. At the same time, liquid medium can be inserted through the inlet pipe 10, so that the liquid medium fills the first pipe body 12 and the second pipe body 13, thereby changing the overall temperature of the pile rod 2. When the air temperature is low, a high-temperature liquid medium is filled in, and when the air temperature is high, a low-temperature liquid medium is filled in, which balances the soil temperature under the subgrade and avoids the soil temperature around the entire pile body from being too high or excessive, thus preventing changes in the stability of the subgrade.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pile structure for reinforcing frozen soil roadbed, characterized in that: The system includes a pile head (1), a pile rod (2) is provided above the pile head (1), a retaining component is provided on the outside of the pile rod (2), a pile tail (7) is provided at the end of the pile rod (2) away from the pile head (1), a closing ring (9) is installed on the pile tail (7), an inlet pipe (10) and an outlet pipe (11) are respectively installed on the pile tail (7), and the ends of the inlet pipe (10) and the outlet pipe (11) extending into the pile rod (2) are respectively connected to a first pipe body (12) and a second pipe body (13), and a connecting pipe (14) is installed between the first pipe body (12) and the second pipe body (13).

2. The frozen soil subgrade reinforcement pile structure according to claim 1, characterized in that: The enclosure assembly includes a docking ring (3), multiple vertical rods (5) and multiple ring bodies (6). The docking ring (3), vertical rods (5) and ring bodies (6) are all located outside the pile rod (2). The docking ring (3) is detachably connected to the pile tail (7). The multiple vertical rods (5) are arranged between the docking ring (3) and the pile head (1) along the axial direction of the pile rod (2). The multiple ring bodies (6) are arranged sequentially at intervals along the axial direction of the pile rod (2), and the ring bodies (6) are connected and fixed to the vertical rods (5).

3. The frozen soil subgrade reinforcement pile structure according to claim 2, characterized in that: The vertical rods (5) are evenly distributed at equal angles between the docking ring (3) and the pile head (1), and the ring bodies (6) are evenly distributed on the vertical rods (5).

4. The frozen soil subgrade reinforcement pile structure according to claim 2, characterized in that: The vertical rod (5) and the ring (6) form a cage-like structure.

5. The frozen soil subgrade reinforcement pile structure according to claim 2, characterized in that: The surface of the docking ring (3) is provided with a first docking thread (4) that matches the inner wall of the closed ring (9), and the surface of the pile tail (7) is provided with a second docking thread (8) that matches the inner wall of the closed ring (9); the closed ring (9) is threadedly connected to the docking ring (3) and the pile tail (7) respectively through the first docking thread (4) and the second docking thread (8).

6. A frozen soil subgrade reinforcement pile structure according to any one of claims 1-5, characterized in that: The first tube (12) and the second tube (13) are both spiral structures, and the first tube (12) and the second tube (13) are located inside the pile rod (2).

7. A frozen soil subgrade reinforcement pile structure according to any one of claims 1-5, characterized in that: The pile head (1), pile rod (2) and pile tail (7) are arranged along the same central axis.

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