A pile foundation construction method for preventing frost heaving

Abstract

The present invention relates to the field of pile foundations and provides a pile foundation construction method for preventing freezing and uplifting, which includes the following steps: positioning and marking the drilling position, heating the drilling position by a snow melting and soil thawing integrated device to melt the snow layer and thaw the frozen soil layer, then drilling the thawed frozen soil layer to form a pile hole, and driving an anti-freezing and uplifting pile into the pile hole; the snow melting and soil thawing integrated device includes a frame, a wheel assembly is provided on the bottom wall of the frame, a hydraulic cylinder is fixedly connected to the frame, a piston rod on the hydraulic cylinder is fixedly connected to a lifting seat, a working box is fixedly connected to the bottom wall of the lifting seat, a protective cylinder is sleeved on the working box, two connecting plates are fixedly connected to the protective cylinder, connecting holes are formed in the connecting plates, two connecting columns are slidably connected to the lifting seat, the two connecting columns respectively pass through the two connecting holes, and a heating assembly is provided on the working box. The present invention can achieve the melting and cleaning of the snow layer and the melting and thawing of the frozen soil layer through a single snow melting and soil thawing integrated device.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundations, and particularly to a pile foundation construction method for preventing frost heaving. Background Art

[0002] During the construction of buildings in cold regions, pile driving is one of the common foundation works. However, the snow layer and frozen soil layer in the winter construction environment pose severe challenges to pile driving operations. The frozen soil layer becomes hard and dense due to extremely low temperatures, and the presence of the snow layer on the frozen soil layer further increases the complexity of the operation. These factors not only reduce the construction efficiency but may also damage the construction equipment and even affect the project quality.

[0003] Therefore, it is necessary to design a construction method that can conveniently heat the frozen soil layer and the snow layer. Summary of the Invention

[0004] In view of the above technical problems, the present invention aims to provide a pile foundation construction method for preventing frost heaving. To solve the above technical problems, the present invention adopts the following technical solutions to achieve:

[0005] A pile foundation construction method for preventing frost heaving includes the following steps: positioning and marking the drilling position, heating the drilling position by using a snow melting and soil thawing integrated device to melt the snow layer and thaw the frozen soil layer, then drilling the thawed frozen soil layer to form a pile hole, and driving an anti-frost heaving pile into the pile hole.

[0006] The snow melting and soil thawing integrated device includes a frame. A wheel assembly is provided on the bottom wall of the frame. A hydraulic cylinder is fixedly connected to the frame. The lower end of the piston rod on the hydraulic cylinder is fixedly connected to a lifting seat. A working box is fixedly connected to the bottom wall of the lifting seat. A protective cylinder is sleeved on the working box. The height of the bottom wall of the protective cylinder is lower than the height of the bottom wall of the working box. Two connecting plates are fixedly connected to the protective cylinder. Connecting holes are formed in the connecting plates. Two connecting columns are slidably connected to the lifting seat. The two connecting columns respectively pass through the two connecting holes. A heating component is provided on the working box.

[0007] Further, the heating component includes a motor body, a rotating rod, a circular plate, a heat-conducting T-shaped member, and a heat-conducting plate. An evaporation chamber and a motor chamber are formed in the working box. The evaporation chamber is filled with clear water. The motor body is fixedly connected to the bottom wall of the motor chamber. The rotating rod is fixedly connected to the rotor of the motor body. The circular plate is fixedly connected to the rotating rod. Two or more rotating permanent magnets are embedded in the top wall of the circular plate. The heat-conducting T-shaped member is embedded between the top wall of the motor chamber and the bottom wall of the evaporation chamber. The heat-conducting plate is fixedly connected to the bottom wall of the working box. The vertical section of the heat-conducting T-shaped member is fixedly connected to the top wall of the heat-conducting plate. The horizontal section of the heat-conducting T-shaped member is located above the circular plate. A main steam pipe is fixedly connected to the inner wall of the evaporation chamber. Two or more branch steam pipes are fixedly connected to the main steam pipe. One end of the branch steam pipe extends to the bottom wall of the heat-conducting plate.

[0008] Further, a driven permanent magnet is fixedly connected to the connecting column. A pump channel and a liquid collecting cavity are formed in the working box. The bottom wall of the pump channel communicates with the top wall of the liquid collecting cavity through a connecting channel. An elevating centrifugal pump and an elevating permanent magnet are slidably connected to the inner wall of the pump channel. The elevating centrifugal pump and the elevating permanent magnet are fixedly connected. An impeller is rotatably connected to the inner wall of the elevating centrifugal pump. An impeller shaft is fixedly connected to the impeller. The impeller shaft extends outside the elevating centrifugal pump. A third worm gear is fixedly connected to the impeller shaft. A second worm is rotatably connected to the inner wall of the elevating centrifugal pump. The left end of the second worm extends into the motor cavity. A first worm gear is fixedly connected to the rotating rod. The third worm gear and the first worm gear are respectively engaged with the second worm. An outlet pipe and an inlet pipe are fixedly connected to the elevating centrifugal pump. The lower end of the inlet pipe extends below the protective cylinder. The lower end of the outlet pipe extends into the connecting channel.

[0009] Further, a first worm is fixedly connected to the top wall of the disc. The upper end of the first worm is rotatably connected to the top wall of the evaporation cavity. An extension plate is fixedly connected to the inner wall of the evaporation cavity. A second worm gear is rotatably connected to the extension plate. The second worm gear is engaged with the first worm. The second worm gear is fixedly connected to the air blade member. The air blade member faces the main steam pipe.

[0010] Further, a first transmission cavity, a second transmission cavity and two rod channels are formed in the working box. A floating member is slidably connected to the inner wall of the evaporation cavity. A connecting rod is fixedly connected to the floating member. A sliding rod is slidably connected to the inner wall of the first transmission cavity. The bottom wall of the sliding rod is fixedly connected to the upper end of the connecting rod. A transmission rod is fixedly connected to the bottom wall of the sliding rod. A movable permanent magnet is fixedly connected to the lower end of the transmission rod. The movable permanent magnet extends into the second transmission cavity. The inner walls of the rod channels communicate with the inner wall of the second transmission cavity through magnet channels. A detection insertion rod is slidably connected to the inner wall of the rod channel. The upper end of the detection insertion rod abuts against an elastic member. The elastic member is connected to the top wall of the rod channel. A limiting groove is formed in the detection insertion rod. The lower end of the detection insertion rod extends to the bottom wall of the heat conducting plate. A limiting permanent magnet is slidably connected to the inner wall of the magnet channel. One end of the limiting permanent magnet extends into the limiting groove. The heights of the two magnet channels are different. The heights of the two limiting grooves are different.

[0011] Further, a ball is rotatably connected to the limiting permanent magnet. The ball is located in the limiting groove.

[0012] Further, a liquid extraction pump is fixedly connected to the bottom wall of the liquid collecting cavity. A liquid guiding pipe is fixedly connected to the liquid extraction pump. One end of the liquid guiding pipe extends into the evaporation cavity.

[0013] Further, two guiding columns are fixedly connected to the frame. The lifting seat is slidably connected to the guiding columns.

[0014] Further, a brake pad is movably connected to the wheel assembly.

[0015] Further, an asphalt water-repellent layer is coated on the outer wall of the frost-proof pile pulling.

[0016] The present invention has the following beneficial effects:

[0017] The present invention can realize the melting and cleaning of the snow layer and the thawing of the frozen soil layer through a snow melting and soil thawing integrated device, so as to reduce the resistance when the drilling machine drills into the frozen soil layer, and can more easily drill the pile hole, improve the construction efficiency and the construction convenience. Description of the Drawings

[0018] The present invention will be further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the following drawings without creative work.

[0019] Figure 1 is a schematic structural diagram of a snow melting and soil thawing integrated device in an anti-pulling pile foundation construction method of the present invention;

[0020] Figure 2 is the present invention Figure 1 an enlarged view of part A therein;

[0021] Figure 3 is the present invention Figure 2 an enlarged view of part B therein;

[0022] Figure 4 is the present invention Figure 2 an enlarged view of part C therein.

[0023] Reference numerals: 1, frame; 2, wheel assembly; 3, brake pad; 4, hydraulic cylinder; 5, piston rod; 6, lifting seat; 7, guide post; 8, working box; 9, connecting column; 10, passive permanent magnet; 11, protective cylinder; 12, connecting plate; 13, connecting hole; 14, pump channel; 15, evaporation chamber; 16, motor chamber; 17, first transmission chamber; 18, second transmission chamber; 19, rod channel; 20, liquid collecting chamber; 21, heat conducting plate; 22, motor body; 23, rotating rod; 24, disc; 25, rotating permanent magnet; 26, first worm; 27, first worm gear; 28, heat conducting T-shaped part; 29, extension plate; 30, second worm gear; 31, wind blade part; 32, main steam pipe; 33, liquid guide pipe; 34, second worm; 35, third worm gear; 36, impeller shaft; 37, lifting centrifugal pump; 38, liquid outlet pipe; 39, liquid inlet pipe; 40, lifting permanent magnet; 41, connecting channel; 42, clear water; 43, floating part; 44, connecting rod; 45, sliding rod; 46, transmission rod; 47, movable permanent magnet; 48, detection insertion rod; 49, elastic part; 50, limiting groove; 51, magnet channel; 52, limiting permanent magnet; 53, branch steam pipe; 54, liquid pumping pump. Detailed Embodiments

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or a connection through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] As Figures 1-4 shown, an anti-freezing and anti-pulling pile foundation construction method includes the following steps: positioning and marking the drilling position, and the marking can be done by spreading colored powder other than white on the drilling position. Using a snow melting and soil thawing integrated device to heat the drilling position to melt the snow layer and thaw the frozen soil layer, and then using a drilling machine to drill the thawed frozen soil layer to form a pile hole, and driving the anti-freezing and anti-pulling pile into the pile hole.

[0028] The snow melting and soil thawing integrated device includes a frame 1. A wheel assembly 2 is provided on the bottom wall of the frame 1. A hydraulic cylinder 4 is fixedly connected to the frame 1. The lower end of the piston rod 5 on the hydraulic cylinder 4 is fixedly connected to a lifting seat 6. A working box 8 is fixedly connected to the bottom wall of the lifting seat 6. A protective cylinder 11 is sleeved on the working box 8. The height of the bottom wall of the protective cylinder 11 is lower than the height of the bottom wall of the working box 8. Two connecting plates 12 are fixedly connected to the protective cylinder 11. Connecting holes 13 are opened on the connecting plates 12. Two connecting columns 9 are slidably connected to the lifting seat 6. The two connecting columns 9 respectively pass through the two connecting holes 13. A heating assembly is provided on the working box 8.

[0029] The heating assembly can heat the snow layer and the frozen soil layer.

[0030] In an alternative embodiment according to the present invention, the heating assembly includes a motor body 22, a rotating rod 23, a disc 24, a heat-conducting T-shaped member 28, and a heat-conducting plate 21. An evaporation chamber 15 and a motor chamber 16 are formed on the working box 8. Clear water 42 is filled in the evaporation chamber 15. The motor body 22 is fixedly connected to the bottom wall of the motor chamber 16. The rotating rod 23 is fixedly connected to the rotor of the motor body 22. The disc 24 is fixedly connected to the rotating rod 23. Two or more rotating permanent magnets 25 are embedded in the top wall of the disc 24. The heat-conducting T-shaped member 28 is embedded between the top wall of the motor chamber 16 and the bottom wall of the evaporation chamber 15. The heat-conducting plate 21 is fixedly connected to the bottom wall of the working box 8. The vertical section of the heat-conducting T-shaped member 28 is fixedly connected to the top wall of the heat-conducting plate 21. The horizontal section of the heat-conducting T-shaped member 28 is located above the disc 24. The inner wall of the evaporation chamber 15 is fixedly connected with a main steam pipe 32. Two or more branch steam pipes 53 are fixedly connected to the main steam pipe 32. One end of the branch steam pipe 53 extends to the bottom wall of the heat-conducting plate 21.

[0031] The materials of the heat-conducting T-shaped member 28 and the heat-conducting plate 21 can be copper. Copper has good heat conductivity and is very suitable as a component for heat conduction. The rotating permanent magnet 25 can be a neodymium magnet with extremely strong magnetism, so as to enhance the efficiency of eddy current generation.

[0032] In an alternative embodiment according to the present invention, a driven permanent magnet 10 is fixedly connected to the connecting column 9. A pump channel 14 and a liquid collection chamber 20 are formed on the working box 8. The bottom wall of the pump channel 14 is communicated with the top wall of the liquid collection chamber 20 through a connecting channel 41. A lifting centrifugal pump 37 and a lifting permanent magnet 40 are slidably connected to the inner wall of the pump channel 14. The lifting centrifugal pump 37 and the lifting permanent magnet 40 are fixedly connected. An impeller is rotatably connected to the inner wall of the lifting centrifugal pump 37. An impeller shaft 36 is fixedly connected to the impeller. The impeller shaft 36 extends outside the lifting centrifugal pump 37. A third worm gear 35 is fixedly connected to the impeller shaft 36. A second worm 34 is rotatably connected to the inner wall of the lifting centrifugal pump 37. The left end of the second worm 34 extends into the motor chamber 16. A first worm gear 27 is fixedly connected to the rotating rod 23. The third worm gear 35 and the first worm gear 27 are respectively engaged with the second worm 34. An outlet pipe 38 and an inlet pipe 39 are fixedly connected to the lifting centrifugal pump 37. The lower end of the inlet pipe 39 extends below the protective cylinder 11. The lower end of the outlet pipe 38 extends into the connecting channel 41. The inlet of the inlet pipe 39 can be arranged on the side wall of the inlet pipe 39.

[0033] The lifting centrifugal pump 37 relies on the centrifugal force generated by the rotation of the impeller inside it to extract the liquid.

[0034] In an alternative embodiment of the present invention, a first worm 26 is fixedly connected to the top wall of the wafer 24. The upper end of the first worm 26 is rotatably connected to the top wall of the evaporation chamber 15. An extension plate 29 is fixedly connected to the inner wall of the evaporation chamber 15. A second worm gear 30 is rotatably connected to the extension plate 29. The second worm gear 30 meshes with the first worm 26. The second worm gear 30 is fixedly connected to the blower member 31, and the blower member 31 faces the main steam pipe 32.

[0035] In an alternative embodiment of the present invention, a first transmission cavity 17, a second transmission cavity 18, and two rod channels 19 are provided on the working box 8. A floating member 43 is slidably connected to the inner wall of the evaporation chamber 15. A connecting rod 44 is fixedly connected to the floating member 43. A sliding rod 45 is slidably connected to the inner wall of the first transmission cavity 17. The bottom wall of the sliding rod 45 is fixedly connected to the upper end of the connecting rod 44. A transmission rod 46 is fixedly connected to the bottom wall of the sliding rod 45. A movable permanent magnet 47 is fixedly connected to the lower end of the transmission rod 46. The movable permanent magnet 47 extends into the second transmission cavity 18. The inner wall of the rod channel 19 is communicated with the inner wall of the second transmission cavity 18 through a magnet channel 51. A detection insertion rod 48 is slidably connected to the inner wall of the rod channel 19. The upper end of the detection insertion rod 48 abuts against an elastic member 49. The elastic member 49 is connected to the top wall of the rod channel 19. A limiting groove 50 is provided on the detection insertion rod 48. The lower end of the detection insertion rod 48 extends to the bottom wall of the heat conducting plate 21. A limiting permanent magnet 52 is slidably connected to the inner wall of the magnet channel 51. One end of the limiting permanent magnet 52 extends into the limiting groove 50. The heights of the two magnet channels 51 are different, and the heights of the two limiting grooves 50 are different.

[0036] The different heights of the two magnet channels 51 can cause the two detection insertion rods 48 to fall and insert into the frozen soil layer for detection at different times.

[0037] In an alternative embodiment of the present invention, a ball is rotatably connected to the limiting permanent magnet 52, and the ball is located in the limiting groove 50. The ball can reduce the sliding friction between components.

[0038] In an alternative embodiment of the present invention, a liquid extraction pump 54 is fixedly connected to the bottom wall of the liquid collection cavity 20. A liquid guide pipe 33 is fixedly connected to the liquid extraction pump 54. One end of the liquid guide pipe 33 extends into the evaporation chamber 15.

[0039] In an alternative embodiment of the present invention, two guide columns 7 are fixedly connected to the frame 1, and the lifting seat 6 is slidably connected to the guide columns 7.

[0040] In an alternative embodiment of the present invention, a brake pad 3 is movably connected to the wheel assembly 2. The brake pad 3 can fix the wheel assembly 2 and enhance the stability of the entire device.

[0041] In an alternative embodiment according to the present invention, the outer wall of the anti-freezing and anti-pulling pile is coated with an asphalt hydrophobic layer. The asphalt hydrophobic layer has anti-freezing and swelling properties, which can improve the anti-freezing and anti-pulling performance of the anti-freezing and anti-pulling pile.

[0042] Implementation process of the snow melting and soil thawing integrated device: The frame 1 is moved to the drilling position by the wheel assembly 2. At this time, a snow layer covers the frozen soil layer. First, the snow layer needs to be melted, then the water formed by the melting is cleaned, and then the frozen soil layer is heated and softened.

[0043] The hydraulic cylinder 4 is opened to extend the piston rod 5. The guide column 7 guides the downward movement of the lifting seat 6 and enhances the movement stability. The lifting seat 6, the working box 8 and the protective cylinder 11 move downward together. First, the lower end of the liquid inlet pipe 39 abuts against the snow layer. The working box 8 continues to move downward. The liquid inlet pipe 39 drives the lifting centrifugal pump 37 and the lifting permanent magnet 40 to move upward relative to the working box 8. The third worm gear 35 disengages from the second worm 34. After the protective cylinder 11 is inserted into the snow layer and then into the frozen soil layer, the lifting permanent magnet 40 moves upward between the two driven permanent magnets 10. The lifting permanent magnet 40 magnetically adsorbs the two driven permanent magnets 10, so that the two connecting columns 9 approach each other and disengage from the connecting holes 13, releasing the connection between the working box 8 and the protective cylinder 11. The bottom wall of the heat conduction plate 21 abuts against the snow layer.

[0044] The motor body 22 is started. The rotor of the motor body 22 drives the rotating rod 23, the disc 24, the first worm gear 27, the second worm 34, the third worm gear 35, the impeller shaft 36, the second worm gear 30 and the wind blade member 31 to rotate. All the rotating permanent magnets 25 rotate at high speed, so that eddy currents are generated inside the heat conduction T-shaped member 28, causing the heat conduction T-shaped member 28 to heat up. The heat of the heat conduction T-shaped member 28 is transferred to the heat conduction plate 21. The heat conduction plate 21 abuts against the snow layer to melt the snow layer into accumulated water.

[0045] Shorten the piston rod 5, move the working box 8 and the lifting seat 6 upward, and keep the protective cylinder 11 on the frozen soil layer to prevent the snow on the snow layer outside the protective cylinder 11 from falling onto the frozen soil layer inside the protective cylinder 11 and affecting subsequent drilling and piling. At the same time, prevent the accumulated water from flowing randomly. The lifting permanent magnet 40 and the lifting centrifugal pump 37 do not move under their own gravity, that is, the lifting permanent magnet 40 and the lifting centrifugal pump 37 move downward relative to the working box 8. The lower end of the liquid inlet pipe 39 remains in contact with the frozen soil layer. The impeller shaft 36 and the second worm 34 are re-engaged. The motor body 22 drives the impeller shaft 36 to rotate, so that the impeller in the lifting centrifugal pump 37 rotates to generate centrifugal force. The liquid inlet pipe 39 pumps the accumulated water to the liquid outlet pipe 38 and sprays it out. The accumulated water falls into the liquid collection cavity 20 through the connection channel 41 for recycling. The liquid extraction pump 54 can be turned on to pump the accumulated water through the liquid guide pipe 33 into the evaporation cavity 15 to become clean water 42 for recycling resources. The heat-conducting T-shaped part 28 heats the clean water 42 to generate steam. The first worm 26 drives the second worm wheel 30 and the wind blade part 31 to rotate. The wind blade part 31 blows the steam into the main steam pipe 32 and sprays it onto the frozen soil layer through two or more branch steam pipes 53 on the main steam pipe 32 to heat and thaw the frozen soil layer. The liquid level of the clean water 42 gradually drops, and the floating part 43 also gradually moves downward. The floating part 43 drives the connecting rod 44, the sliding rod 45, the transmission rod 46, and the movable permanent magnet 47 to gradually move downward. When the movable permanent magnet 47 moves downward to the same horizontal plane as an upper limit permanent magnet 52, the movable permanent magnet 47 magnetically attracts the limit permanent magnet 52, so that the limit permanent magnet 52 disengages from the limit groove 50. After one of the detection insertion rods 48 loses the limit of the limit permanent magnet 52, the detection insertion rod 48 quickly moves downward under the elastic force of the elastic part 49. The detection insertion rod 48 is inserted into the frozen soil layer. According to the depth of the detection insertion rod 48 inserted into the frozen soil layer, the softening condition of the frozen soil layer is judged whether it meets the standard. If it does not meet the standard, continue heating. The liquid level of the clean water 42 continues to drop. When the movable permanent magnet 47 moves downward to the same horizontal plane as a lower limit permanent magnet 52, another detection insertion rod 48 is inserted into the frozen soil layer by the same principle to judge again whether the softening condition of the frozen soil layer meets the standard.

[0046] The present invention can realize the melting and cleaning of the snow layer through a snow melting and soil thawing integrated device. The protective cylinder 11 is inserted into the frozen soil layer to prevent external snow from entering the cleaned frozen soil layer area and prevent the accumulated water generated by the melting of the snow layer from flowing out. Moreover, the recycled accumulated water can be evaporated, and the steam can be used to thaw the frozen soil layer, so as to reduce the resistance when the drilling machine drills into the frozen soil layer, and it can drill the pile hole more easily, improving the construction efficiency. After heating the frozen soil layer for a period of time, a detection insertion rod 48 can be automatically inserted into the frozen soil layer, enabling the constructor to quickly judge whether the frozen soil layer is softened up to the standard and improving the construction convenience.

[0047] Components, modules, mechanisms, and devices whose structures are not described in detail in the present invention are all common standard parts or parts known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method for pile foundation construction to prevent freezing and pulling out, characterized in that: The following steps are involved: The drilling position is located and marked, and the drilling position is heated by using a snow melting and soil thawing device to melt the snow layer and thaw the frozen soil layer, and then the pile hole is drilled into the thawed frozen soil layer to form a pile hole, and the antifreeze pile is driven into the pile hole; The snow melting and soil thawing device comprises a frame (1), the bottom wall of the frame (1) is provided with a wheel assembly (2), the frame (1) is fixedly connected with a hydraulic cylinder (4), the lower end of a piston rod (5) on the hydraulic cylinder (4) is fixedly connected with a lifting seat (6), the bottom wall of the lifting seat (6) is fixedly connected with a working box (8), the working box (8) is sleeved with a protective tube (11), the height of the bottom wall of the protective tube (11) is lower than the height of the bottom wall of the working box (8), two connecting plates (12) are fixedly connected to the protective tube (11), the connecting plates (12) are provided with connecting holes (13), two connecting columns (9) are slidably connected to the lifting seat (6), the two connecting columns (9) respectively pass through the two connecting holes (13), and a heating assembly is provided on the working box (8); The heating assembly comprises a motor body (22), a rotating rod (23), a disc (24), a heat-conducting T-piece (28) and a heat-conducting plate (21); the working box (8) is provided with an evaporation chamber (15) and a motor chamber (16); the evaporation chamber (15) is filled with clean water (42); the motor body (22) is fixedly connected to the bottom wall of the motor chamber (16); the rotating rod (23) is fixedly connected to the rotor of the motor body (22); the disc (24) is fixedly connected to the rotating rod (23); and the top wall of the disc (24) is inlaid with two or more rotating permanent magnets (2 5), a heat-conducting T-piece (28) is embedded between the top wall of the motor cavity (16) and the bottom wall of the evaporation cavity (15), a heat-conducting plate (21) is fixedly connected to the bottom wall of the working box (8), a vertical section of the heat-conducting T-piece (28) is fixedly connected to the top wall of the heat-conducting plate (21), a horizontal section of the heat-conducting T-piece (28) is located above the disc (24), a main steam pipe (32) is fixedly connected to the inner wall of the evaporation cavity (15), two or more branch steam pipes (53) are fixedly connected to the main steam pipe (32), and one end of the branch steam pipe (53) extends to the bottom wall of the heat-conducting plate (21).

2. A method for pile foundation construction against freezing and pulling according to claim 1, characterized in that: A driven permanent magnet (10) is fixedly connected to the connecting column (9), a pump channel (14) and a liquid collecting chamber (20) are provided on the working box (8), the bottom wall of the pump channel (14) is connected to the top wall of the liquid collecting chamber (20) through a connecting channel (41), a lifting centrifugal pump (37) and a lifting permanent magnet (40) are slidably connected to the inner wall of the pump channel (14), the lifting centrifugal pump (37) and the lifting permanent magnet (40) are fixedly connected, an impeller is rotatably connected to the inner wall of the lifting centrifugal pump (37), an impeller shaft (36) is fixedly connected to the impeller, the impeller shaft (36) extends to the outside of the lifting centrifugal pump (37), and the impeller A third worm gear (35) is fixedly connected to the shaft (36); a second worm (34) is rotatably connected to the inner wall of the lifting centrifugal pump (37); the left end of the second worm (34) extends into the motor cavity (16); a first worm gear (27) is fixedly connected to the rotating rod (23); the third worm gear (35) and the first worm gear (27) are respectively meshed with the second worm (34); a liquid outlet pipe (38) and a liquid inlet pipe (39) are fixedly connected to the lifting centrifugal pump (37); the lower end of the liquid inlet pipe (39) extends to below the protective tube (11); and the lower end of the liquid outlet pipe (38) extends into the connecting channel (41).

3. A method for pile foundation construction against freezing and pulling according to claim 2, characterized in that: A first worm (26) is fixedly connected to the top wall of the disc (24); the upper end of the first worm (26) is rotatably connected to the top wall of the evaporation chamber (15); an extension plate (29) is fixedly connected to the inner wall of the evaporation chamber (15); a second worm gear (30) is rotatably connected to the extension plate (29); the second worm gear (30) is meshed with the first worm (26); the second worm gear (30) is fixedly connected to a fan blade (31); and the fan blade (31) faces a main steam pipe (32).

4. A method for pile foundation construction to prevent freezing and pulling out according to claim 3, characterized in that: The working box (8) is provided with a first transmission chamber (17), a second transmission chamber (18) and two rod channels (19); a floating member (43) is slidably connected to the inner wall of the evaporation chamber (15); a connecting rod (44) is fixedly connected to the floating member (43); a sliding rod (45) is slidably connected to the inner wall of the first transmission chamber (17); a bottom wall of the sliding rod (45) is fixedly connected to the upper end of the connecting rod (44); a transmission rod (46) is fixedly connected to the bottom wall of the sliding rod (45); a movable permanent magnet (47) is fixedly connected to the lower end of the transmission rod (46); the movable permanent magnet (47) extends into the second transmission chamber (18); and the inner wall of the rod channel (19) is connected to the inner wall of the rod channel (19) through a magnet channel ( The inner wall of the rod channel (19) is connected to the inner wall of the second transmission cavity (18); a detection rod (48) is slidably connected to the inner wall of the rod channel (19); the upper end of the detection rod (48) abuts against the elastic member (49); the elastic member (49) is connected to the top wall of the rod channel (19); a limiting groove (50) is provided on the detection rod (48); the lower end of the detection rod (48) extends to the bottom wall of the heat conducting plate (21); a limiting permanent magnet (52) is slidably connected to the inner wall of the magnet channel (51); one end of the limiting permanent magnet (52) extends into the limiting groove (50); the two magnet channels (51) have different heights; and the two limiting grooves (50) have different heights.

5. The method for pile foundation construction against freezing and pulling out according to claim 4 is characterized in that: A ball is rollingly connected to the limiting permanent magnet (52), and the ball is located in the limiting groove (50).

6. A method for pile foundation construction to prevent freezing and pulling out according to claim 5, characterized in that: A liquid pump (54) is fixedly connected to the bottom wall of the liquid collecting chamber (20), a liquid guide tube (33) is fixedly connected to the liquid pump (54), and one end of the liquid guide tube (33) extends into the evaporation chamber (15).

7. A method for pile foundation construction to prevent freezing and pulling out according to claim 6, characterized in that: Two guide columns (7) are fixedly connected to the frame (1), and the lifting seat (6) is slidably connected to the guide columns (7).

8. The method for pile foundation construction against freezing and pulling out according to claim 7, characterized in that: A brake pad (3) is movably connected to the wheel assembly (2).

9. A method for pile foundation construction against freezing and pulling according to any one of claims 1 to 8, characterized in that: The outer wall of the antifreeze pile is coated with an asphalt hydrophobic layer.

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