A kind of anti-freeze pile foundation support device

Abstract

The present invention provides an anti-freezing pile foundation support device, comprising a pile foundation tube, a pile foundation tube top seat, a pile foundation tube base and a frost heave piercing mechanism, wherein the pile foundation tube top seat is fixedly installed on the top of the pile foundation tube, and the pile foundation tube top seat is used to connect with a target to be supported; a pile foundation tube base is arranged at the bottom of the pile foundation tube, and a plurality of threaded drill rod assemblies are arranged on the pile foundation tube base; and the frost heave piercing mechanism is fixedly installed on the tube wall of the pile foundation tube. When the soil body freezes and heaves, the transverse anchor rod of the frost heave piercing mechanism can pierce the soil body laterally outward, so that the pile foundation tube is anchored together with the surrounding soil body, thereby playing an anti-freezing and pulling role.

Description

Technical Field

[0001] The invention relates to the technical field of foundation support, and in particular to an anti-freezing and pulling out pile foundation support device. Background Art

[0002] Frozen areas are also called permafrost, tundra or tundra. In physical geography, it refers to low temperatures and short growing seasons. In geology, it refers to various rocks and soils below 0°C and containing ice. It can generally be divided into short-term frozen soil, seasonal frozen soil and permafrost. Frost heave refers to the situation in seasonal frozen soil or permafrost areas. In the cold season, when the soil freezes and expands, the supporting foundation fixed in the frozen soil layer is lifted up due to the tangential frost heave force and loses its fixing effect. When the warm season melts, the soil falls back, and the lifted supporting foundation is difficult to return to its original position, resulting in the lifting phenomenon. In view of this, it is necessary to propose an anti-freeze heave supporting foundation structure suitable for use in frozen soil areas.

[0003] At present, the existing anti-freeze support foundation structure requires large-scale excavation of the original foundation and large-scale pouring of concrete to construct a stable support foundation. However, concrete often causes alkalinization of the construction area and affects the growth of surrounding vegetation. Therefore, this construction method will cause ecological damage to nature reserves. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the prior art and provide an anti-freezing and pulling-out pile foundation supporting device.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An anti-freeze-up pile foundation support device comprises a pile foundation tube, a pile foundation tube top seat, a pile foundation tube base and a frost heave piercing mechanism;

[0007] A pile foundation cylinder top seat is fixedly installed on the top of the pile foundation cylinder, and the pile foundation cylinder top seat is used to connect with the target to be supported; the pile foundation cylinder base is arranged at the bottom of the pile foundation cylinder, and a plurality of threaded drill rod assemblies are arranged on the pile foundation cylinder base for fixing with the foundation;

[0008] The frost heave piercing mechanism is fixedly installed on the wall of the pile foundation tube, and the frost heave piercing mechanism includes: an L-shaped main pipe, a sliding rod, a transverse anchor rod, a frost heave force sensing base, a movable soil retaining device and a liquid bag, wherein the L-shaped main pipe includes a transverse pipe section and a vertical pipe section at the top, a mounting block is fixedly arranged inside the vertical pipe section of the L-shaped main pipe, the sliding rod is vertically slidably installed in the mounting block, a limiting plate is fixedly arranged at the middle position of the sliding rod, a spring is arranged between the limiting plate and the mounting block, and a limiting protrusion is arranged inside the bottom end of the vertical pipe section of the L-shaped main pipe for limiting the limiting plate; a first piston is arranged at the top end of the sliding rod; the transverse anchor rod is slidably installed in the transverse pipe section of the L-shaped main pipe, and a second piston is arranged at the tail of the transverse anchor rod;

[0009] A frost heave force sensing base is arranged at the bottom end of the sliding rod, and a movable soil retaining device is arranged between the frost heave force sensing base and the vertical pipe section of the L-shaped main pipe;

[0010] The liquid bag is embedded in the movable soil retaining device, the sliding rod has a liquid channel inside, and a through hole is arranged at the center of the first piston, the through hole is connected with the liquid channel of the sliding rod, and the bottom side of the liquid bag and the liquid channel of the sliding rod are connected through a connecting pipe, so that the liquid bag is connected with the internal space of the L-shaped main pipe between the first piston and the second piston; the inside of the liquid bag, the inside of the liquid channel of the sliding rod and the internal space of the L-shaped main pipe between the first piston and the second piston are all filled with hydraulic oil.

[0011] In the above technical solution, the pile foundation tube base is in the shape of an inverted cone, and the inverted cone-shaped pile foundation tube base can cause the foundation soil inside the foundation hole to exert a downward compression effect on it.

[0012] In the above technical solution, the threaded drill rod assembly includes a threaded barrel, a threaded drill rod and a protective cap. The threaded barrel is fixedly arranged on the base of the pile foundation barrel, the threaded drill rod is installed in the threaded barrel through a thread, the threaded drill rod is used to drill into the foundation, and the protective cap is installed on the top of the threaded drill rod.

[0013] In the above technical solution, a frost heave piercing mechanism mounting frame is provided on the wall of the pile foundation cylinder, and the frost heave piercing mechanism is fixed on the frost heave piercing mechanism mounting frame.

[0014] In the above technical solution, a transverse retaining arm is provided on the mounting frame of the frost heave piercing mechanism, so that the transverse pipe section at the top of the L-shaped main pipe is fixedly welded on the transverse retaining arm.

[0015] In the above technical solution, the movable soil retaining device includes a top fixed cover and N-level sliding sleeves, N is greater than or equal to 2, the top fixed cover is fixedly sleeved on the bottom of the vertical pipe section of the L-shaped main pipe, and the N-level sliding sleeves are slidably sleeved in sequence, wherein the uppermost sliding sleeve is vertically slidably installed in the top fixed cover, and the lowermost sliding sleeve is fixedly sleeved on the frost heave force sensing base. In this way, when backfilling, the movable soil retaining device can block the backfill soil, and when frost heave occurs, the movable soil retaining device can prevent the surrounding soil from exerting a downward force on the frost heave force sensing base, and the multi-level sliding sleeve can be vertically extended and retracted, so it will not hinder the upward movement of the frost heave force sensing base.

[0016] In the above technical solution, the front end of the transverse anchor rod is a pointed structure, which is convenient for penetrating into the soil; the transverse anchor rod is also provided with barbs, which is convenient for stabilizing in the soil after penetrating into the soil.

[0017] In the above technical solution, a limiting ring is further provided at the front end of the transverse pipe section of the L-shaped main pipe to limit the extreme position of the transverse anchor rod being pushed outward to prevent the transverse anchor rod from falling out.

[0018] In the above technical solution, there are multiple frost heave piercing mechanisms, which are evenly distributed on the wall of the pile foundation tube in the circumferential direction.

[0019] In the above technical solution, when the pile foundation cylinder is backfilled, the transverse anchor rod is inside the transverse pipe section of the L-shaped main pipe. After the backfilling is completed, when the soil frost heaves, the frost heave force senses the base to move upward, and at the same time, the movable soil retaining device is compressed, causing the sliding rod to move vertically upward, driving the transverse anchor rod to penetrate laterally outward into the soil.

[0020] In the above technical solution, when the soil body undergoes frost heave, the movable soil retaining device is compressed, the liquid bag is squeezed, and the hydraulic oil inside it enters the internal space of the L-shaped main pipe through the liquid channel of the sliding rod and the through hole of the first piston, thereby increasing the oil pressure in the L-shaped main pipe, increasing the driving force on the second piston, and prompting the transverse anchor rod to be pushed outward.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The antifreeze pile foundation support device of the present invention is simple to construct. During construction, a foundation hole is excavated, a threaded drill rod is installed, and then the foundation soil is backfilled. There is no need to excavate a large area of ​​the original foundation and pour concrete (concrete often causes alkali in the construction area and affects the growth of surrounding vegetation). It is particularly suitable for nature reserves with frozen soil to avoid ecological damage;

[0023] 2. The anti-freezing pile foundation support device of the present invention has a frost heave piercing mechanism, and the frost heave force sensing base is used to sense the frost heave force of the soil body, and drives the sliding rod to move upward under the frost heave force. Before frost heave occurs, the bottom end of the sliding rod extends out of the bottom of the vertical pipe section of the L-shaped main pipe, and reserves a margin for upward movement. When backfilling the foundation soil, the movable retaining device can leave a movement space between the frost heave force sensing base and the bottom of the vertical pipe section of the L-shaped main pipe. There is no backfill soil in this space, and it will not be affected by the downward frost heave force of the soil body. At the same time, the movable retaining device will not hinder the upward movement of the frost heave force sensing base. After the backfilling and burial is completed, when the soil body is frozen and heaved, the frost heave force sensing base is forced to move upward, and the movable retaining device is compressed, so that the sliding rod moves vertically upward, driving the transverse anchor rod to penetrate the soil body laterally outward. In addition, a liquid bag is also arranged inside the movable soil retaining device of the frost heave piercing mechanism of the present invention, and a liquid channel is provided inside the sliding rod. The liquid bag is connected to the bottom side of the sliding rod through a connecting pipe, so that the liquid bag is connected to the internal space of the L-shaped main pipe between the first piston and the second piston; in this way, after backfilling the soil, when the soil is frozen and heaved, the movable soil retaining device is compressed, and the liquid bag is squeezed, and the hydraulic oil inside it enters the internal space of the L-shaped main pipe through the liquid channel of the sliding rod and the through hole of the first piston, thereby further increasing the oil pressure in the L-shaped main pipe, increasing the driving force on the second piston, and better prompting the transverse anchor rod to be ejected outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the installation of the antifreeze pile foundation support device of the present invention.

[0025] Figure 2 It is a schematic diagram of the antifreeze-pulling pile foundation supporting device of the present invention.

[0026] Figure 3 for Figure 2 An enlarged schematic diagram of point A.

[0027] Figure 4 It is a structural schematic diagram of the frost heave penetration mechanism in the present invention (the transverse anchor rod is in a contracted state).

[0028] Figure 5 It is a structural schematic diagram of the frost heave piercing mechanism in the present invention (the transverse anchor rod is in the piercing state).

[0029] Figure 6 It is a partially enlarged schematic diagram of the frost heave penetration mechanism in the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-Figure 3 As shown, an anti-freezing pile foundation supporting device includes a pile foundation tube 1, a pile foundation tube top seat 2, a pile foundation tube base 3 and a frost heave penetration mechanism 5.

[0032] The pile foundation tube 1 is installed in the foundation 0 (during construction, first, a foundation hole 10 is excavated in the foundation 0, and then the pile foundation tube 1 is installed into the foundation hole 10 and backfilled), and a pile foundation tube top seat 2 is fixedly installed on the top of the pile foundation tube 1, and the pile foundation tube top seat 2 is used to connect with the target to be supported (for example, it can be a pipeline, a road pole, etc.).

[0033] The pile foundation tube base 3 is arranged at the bottom of the pile foundation tube 1. The pile foundation tube base 3 is preferably in an inverted cone shape. The inverted cone-shaped pile foundation tube base 3 can make the foundation soil inside the foundation hole produce a downward compression effect on it; and a plurality of threaded drill rod assemblies are arranged on the pile foundation tube base 3. Specifically, the threaded drill rod assembly includes a threaded tube 31, a threaded drill rod 32 and a protective cap 33. The threaded tube 31 is fixedly arranged on the pile foundation tube base 3. The threaded drill rod 32 is installed in the threaded tube 31 by thread penetration. The threaded drill rod 32 is used to drill into the foundation, so that the stability of the pile foundation tube is better. The protective cap 33 is installed on the top of the threaded drill rod 32.

[0034] The frost heave piercing mechanism 5 is fixedly mounted on the wall of the pile foundation tube 1. Preferably, a frost heave piercing mechanism mounting frame 11 is provided on the wall of the pile foundation tube 1, and the frost heave piercing mechanism 5 is fixed on the frost heave piercing mechanism mounting frame 11. Figure 4 -Attached Figure 6 , the structure and working principle of the frost heave penetration mechanism 5 are specifically introduced.

[0035] The frost heave piercing mechanism 5 comprises: an L-shaped main pipe 51, a sliding rod 52, a transverse anchor rod 53, a frost heave force sensing base 54, a movable soil retaining device 55 and a liquid bag 6, wherein the L-shaped main pipe 51 is fixedly installed (welded) on the frost heave piercing mechanism mounting frame 11, and the L-shaped main pipe 51 comprises a transverse pipe section and a vertical pipe section at the top. Preferably, since the L-shaped main pipe 51 of the frost heave piercing mechanism 5 is L-shaped, a transverse retaining arm 111 is provided on the frost heave piercing mechanism mounting frame 11 (see attached Figure 3), so that the transverse pipe section at the top of the L-shaped main pipe 51 is fixedly welded on the transverse blocking arm 111 to ensure the stability of the L-shaped main pipe 51; the sliding rod 52 is vertically slidably installed in the vertical pipe section of the L-shaped main pipe 51. Specifically, a mounting block 56 is fixedly arranged inside the vertical pipe section of the L-shaped main pipe 51, and the sliding rod 52 is vertically slidably installed in the mounting block 56, and can slide up and down. A limit plate 58 is also fixedly arranged at the middle position of the sliding rod 52, and a spring 57 is arranged between the limit plate 58 and the mounting block 56, so as to provide a downward elastic force for the sliding rod 52, and A limiting protrusion 500 is provided inside the bottom end of the vertical pipe section for limiting the limiting plate 58 to prevent the limiting plate 58 from falling out of the L-shaped main pipe 51; a first piston 59 is provided at the top end of the sliding rod 52; the transverse anchor rod 53 is slidably installed in the transverse pipe section of the L-shaped main pipe 51, and a sliding guide 532 is provided at the tail of the transverse anchor rod 53 to ensure that the transverse anchor rod 53 can move stably in the transverse direction in the transverse pipe section of the L-shaped main pipe 51, and a second piston 533 is also provided on the tail side of the sliding guide 532; the L-shaped main pipe 51 between the first piston 59 and the second piston 533 is filled with hydraulic oil.

[0036] Through the above structure, when the sliding rod 52 moves vertically upward, the first piston 59 applies pressure to the hydraulic oil, thereby driving the transverse anchor rod 53 to be pushed out laterally along the transverse pipe section of the L-shaped main pipe 51. Then, the function to be achieved by the present invention is that when the pile foundation tube 1 is backfilled and buried, the transverse anchor rod 53 is inside the transverse pipe section of the L-shaped main pipe 51. After the backfilling and burying is completed, when the soil body freezes and heaves, the sliding rod 52 can be moved vertically upward under the action of the freeze heave, thereby driving the transverse anchor rod 53 to penetrate the soil body laterally outward, so that the pile foundation tube 1 and the surrounding soil body are more stably anchored together, thereby effectively playing an anti-freeze pull effect. Therefore, the present invention sets a frost heave force sensing base 54 at the bottom end of the sliding rod 52, and sets a movable soil retaining device 55 between the frost heave force sensing base 54 and the vertical pipe section of the L-shaped main pipe 51. Specifically, the frost heave force sensing base 54 is used to sense the frost heave force of the soil body, and drive the sliding rod 52 to move upward under the frost heave force. Before frost heave occurs, the bottom end of the sliding rod 52 should extend out of the bottom of the vertical pipe section of the L-shaped main pipe 51 to reserve a movable margin for upward movement, and the area of ​​the frost heave force sensing base 54 should be large enough to be larger than the horizontal area of ​​the vertical pipe section of the L-shaped main pipe 51. Cross-sectional area, in order to fully receive the effect of frost heave force, the frost heave force sensing base 54 of the present invention includes a circular bottom plate 541, and a hemispherical structure 542 is designed on the bottom surface of the bottom plate 541, which helps it to fully receive the frost heave force of the surrounding soil body, and convert the frost heave force into a vertical upward force, thereby pushing the sliding rod 52 to move upward; the function of the movable soil retaining device 55 is to avoid the frost heave force sensing base 54 from being subjected to the downward frost heave force of the soil body as much as possible, that is, to ensure that when frost heave occurs, the frost heave force sensing base 54 is only subjected to the upward frost heave force. Through the movable soil retaining device 55, when backfilling the base soil, a movement space can be reserved between the frost heave force sensing base 54 and the bottom of the vertical pipe section of the L-shaped main pipe 51, and this space has no backfill soil and will not be subjected to the downward frost heave force of the soil body. At the same time, the movable soil retaining device 55 will not hinder the frost heave force sensing base 54 from moving upward.

[0037] Specifically, the movable soil retaining device 55 includes a top fixed cover 551 and an N-stage sliding sleeve. In this embodiment, a two-stage sliding sleeve (i.e., N=2) is adopted, namely, a first-stage sliding sleeve 552 and a second-stage sliding sleeve 553. The first-stage sliding sleeve 552 is vertically slidably installed in the top fixed cover 551 through a slideway, and the second-stage sliding sleeve 553 is vertically slidably installed in the first-stage sliding sleeve 552 through a slideway, and the second-stage sliding sleeve 553 is fixedly sleeved on the frost heave force sensing base 54, and the top fixed cover 551 is fixedly sleeved on the bottom of the vertical pipe section of the L-shaped main pipe 51. In this way, when backfilling, the movable soil retaining device 55 can block the backfill soil, and when frost heave occurs, the movable soil retaining device 55 can also prevent the surrounding soil from exerting a downward force on the frost heave force sensing base 54, and the N-stage sliding sleeve can be vertically extended and retracted, so it will not hinder the upward movement of the frost heave force sensing base 54.

[0038] The liquid capsule 6 is embedded in the movable soil retaining device 55. The sliding rod 52 is a hollow rod, that is, it has a liquid channel 521 inside, and a through hole 591 is also provided at the center of the first piston 59 at the top of the sliding rod 52. The through hole 591 is connected to the liquid channel 521 of the sliding rod 52, and the liquid capsule 6 is connected to the bottom side of the liquid channel of the sliding rod 52 through a connecting pipe 61, so that the liquid capsule 6 is connected to the internal space of the L-shaped main pipe 51 between the first piston 59 and the second piston 533; the liquid channel inside the liquid capsule 6 and the sliding rod 52 is connected to the liquid channel 521 of the sliding rod 52. The interior of 521 and the interior space of the L-shaped main pipe 51 between the first piston 59 and the second piston 533 are filled with hydraulic oil; in this way, after backfilling the soil, when the soil frost heaves, the movable soil retaining device 55 is compressed, and the liquid bag 6 is squeezed, and the hydraulic oil inside it enters the interior space of the L-shaped main pipe 51 through the liquid channel 521 of the sliding rod 52 and the through hole 591 of the first piston 59, thereby further increasing the oil pressure in the L-shaped main pipe 51, increasing the driving force on the second piston 533, and better prompting the transverse anchor rod 53 to be ejected outward.

[0039] Furthermore, it should be noted that the function of the combined structure formed by the mounting block 56, the limit plate 58 and the spring 57 is to provide a downward elastic force for the sliding rod 52, so that the movable soil retaining device 55 can remain in the expanded state during the backfilling process; and when the soil frost heaves, the force of the frost heave is very large, which can enable the sliding rod 52 to overcome the elastic force of the spring and move upward.

[0040] Furthermore, the front end of the transverse anchor rod 53 is a pointed structure, which is convenient for piercing the soil outward, and the transverse anchor rod 53 is also provided with a barb 531, which is convenient for stabilizing in the soil after piercing the soil. In addition, a limiting ring 534 is also provided at the front end of the transverse pipe section of the L-shaped main pipe 51, which is used to limit the extreme position of the transverse anchor rod 53 to be pushed outward, so as to prevent the transverse anchor rod 53 from falling out.

[0041] Furthermore, there are multiple frost heave piercing mechanisms 5 , which are evenly distributed on the wall of the pile foundation tube 1 in the circumferential direction.

[0042] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A frost-proof pile foundation support device, characterized in that: It includes a pile foundation tube, a pile foundation tube top seat, a pile foundation tube base and a frost heave piercing mechanism; A pile foundation cylinder top seat is fixedly installed on the top of the pile foundation cylinder, and the pile foundation cylinder top seat is used to connect with the target to be supported; the pile foundation cylinder base is arranged at the bottom of the pile foundation cylinder, and a plurality of threaded drill rod assemblies are arranged on the pile foundation cylinder base for fixing with the foundation; The frost heave piercing mechanism is fixedly installed on the wall of the pile foundation tube, and the frost heave piercing mechanism includes: an L-shaped main pipe, a sliding rod, a transverse anchor rod, a frost heave force sensing base, a movable soil retaining device and a liquid bag, wherein the L-shaped main pipe includes a transverse pipe section and a vertical pipe section at the top, a mounting block is fixedly arranged inside the vertical pipe section of the L-shaped main pipe, the sliding rod is vertically slidably installed in the mounting block, a limiting plate is fixedly arranged at the middle position of the sliding rod, a spring is arranged between the limiting plate and the mounting block, and a limiting protrusion is arranged inside the bottom end of the vertical pipe section of the L-shaped main pipe for limiting the limiting plate; a first piston is arranged at the top end of the sliding rod; the transverse anchor rod is slidably installed in the transverse pipe section of the L-shaped main pipe, and a second piston is arranged at the tail of the transverse anchor rod; A frost heave force sensing base is arranged at the bottom end of the sliding rod, and a movable soil retaining device is arranged between the frost heave force sensing base and the vertical pipe section of the L-shaped main pipe; The liquid bag is embedded in the movable earth retaining device, the sliding rod has a liquid channel inside, and the first piston is provided with a through hole at its center, the through hole is connected to the liquid channel of the sliding rod, and the liquid bag is connected to the bottom side of the liquid channel of the sliding rod through a connecting pipe, so that the liquid bag is connected to the internal space of the L-shaped main pipe between the first piston and the second piston; the liquid bag, the liquid channel of the sliding rod and the internal space of the L-shaped main pipe between the first piston and the second piston are all filled with hydraulic oil; The movable earth retaining device includes a top fixed cover and N-level sliding sleeves, N is greater than or equal to 2, the top fixed cover is fixedly sleeved on the bottom of the vertical pipe section of the L-shaped main pipe, and the N-level sliding sleeves are slidably sleeved in sequence, wherein the uppermost sliding sleeve is vertically slidably installed in the top fixed cover, and the lowermost sliding sleeve is fixedly sleeved on the frost heave force sensing base.

2. The anti-freezing pile foundation support device according to claim 1 is characterized in that: The base of the pile foundation cylinder is in the shape of an inverted cone.

3. The anti-freezing pile foundation support device according to claim 1 is characterized in that: The threaded drill rod assembly includes a threaded barrel, a threaded drill rod and a protective cap. The threaded barrel is fixedly arranged on the base of the pile foundation barrel. The threaded drill rod is installed in the threaded barrel through threads. The threaded drill rod is used to drill into the foundation. The protective cap is installed on the top of the threaded drill rod.

4. The anti-freezing pile foundation support device according to claim 1 is characterized in that: A frost heave piercing mechanism mounting frame is arranged on the cylinder wall of the pile foundation cylinder, and the frost heave piercing mechanism is fixed on the frost heave piercing mechanism mounting frame.

5. The anti-freezing pile foundation support device according to claim 4 is characterized in that: A transverse retaining arm is arranged on the mounting frame of the frost heave piercing mechanism, so that the transverse pipe section at the top of the L-shaped main pipe is fixedly welded on the transverse retaining arm.

6. The anti-freezing pile foundation support device according to claim 1, characterized in that: The front end of the transverse anchor rod is a pointed end structure, and barbs are also arranged on the transverse anchor rod.

7. The anti-freezing pile foundation support device according to claim 1 is characterized in that: A limiting ring is also arranged at the front end of the transverse pipe section of the L-shaped main pipe to limit the extreme position of the transverse anchor rod being ejected outward.

8. The anti-freezing pile foundation support device according to claim 1 is characterized in that: When backfilling and burying the pile foundation cylinder, the transverse anchor rod is inside the transverse pipe section of the L-shaped main pipe. After the backfilling and burying is completed, when the soil frost heaves, the frost heave force senses the base to move upward, and at the same time the movable retaining device is compressed, causing the sliding rod to move vertically upward, driving the transverse anchor rod to penetrate laterally outward into the soil.

9. The anti-freezing pile foundation support device according to claim 8, characterized in that: When the soil body freezes and heaves, the movable soil retaining device is compressed, the liquid bag is squeezed, and the hydraulic oil inside it enters the internal space of the L-shaped main pipe through the liquid channel of the sliding rod and the through hole of the first piston, thereby increasing the oil pressure in the L-shaped main pipe, increasing the driving force on the second piston, and prompting the transverse anchor rod to be pushed outward.

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