Anti-freezing and anti-pulling pile foundation construction method

Abstract

The invention relates to the field of pile foundations, and provides an anti-freezing pile foundation construction method which comprises the following steps: positioning and marking a drilling position, heating the drilling position by utilizing a snow melting and soil body unfreezing integrated device to melt an accumulated snow layer and unfreeze a frozen soil layer, and then drilling the unfrozen frozen soil layer to form a pile hole, the anti-freezing pulling pile is driven into the pile hole; the snow melting and soil body unfreezing integrated device comprises a rack, a wheel assembly is arranged on the bottom wall of the rack, a hydraulic cylinder is fixedly connected to the rack, a piston rod on the hydraulic cylinder is fixedly connected with a lifting seat, a working box is fixedly connected to the bottom wall of the lifting seat, the working box is sleeved with a protective barrel, two connecting plates are fixedly connected to the protective barrel, and connecting holes are formed in the connecting plates. Two connecting columns are connected to the lifting base in a sliding mode and penetrate through the two connecting holes correspondingly, and a heating assembly is arranged on the working box. According to the snow melting and soil body unfreezing integrated device, snow accumulation layers can be melted and cleaned, and frozen soil layers can be melted and unfrozen.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundations, and in particular to a pile foundation construction method for preventing freezing and pulling out. Background Art

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

[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 freezing and pulling out. To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A method for constructing a pile foundation with anti-freezing and pulling out, comprising the following steps: positioning and marking a 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 a pile hole in the thawed frozen soil layer, and driving an anti-freezing and pulling out pile into the pile hole;

[0006] The integrated snow melting and soil thawing 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 lifting seat is fixedly connected to the lower end of the piston rod on the hydraulic cylinder, a working box is fixedly connected to the bottom wall of the lifting seat, a protective tube is sleeved on the working box, the height of the bottom wall of the protective tube is lower than the height of the bottom wall of the working box, two connecting plates are fixedly connected to the protective tube, connecting holes are opened on the connecting plates, two connecting columns are slidably connected to the lifting seat, the two connecting columns pass through the two connecting holes respectively, and a heating assembly is provided on the working box.

[0007] Furthermore, the heating component includes a motor body, a rotating rod, a disc, a heat-conducting T-piece and a heat-conducting plate. The working box is provided with an evaporation chamber and a motor chamber, the evaporation chamber is filled with clean water, the motor body is fixed to the bottom wall of the motor chamber, the rotating rod is fixed to the rotor of the motor body, the disc is fixed to the rotating rod, the top wall of the disc is inlaid with two or more rotating permanent magnets, the heat-conducting T-piece is inlaid between the top wall of the motor chamber and the bottom wall of the evaporation chamber, the heat-conducting plate is fixed to the bottom wall of the working box, the vertical section of the heat-conducting T-piece is fixed to the top wall of the heat-conducting plate, the horizontal section of the heat-conducting T-piece is located above the disc, the inner wall of the evaporation chamber is fixed with a main steam pipe, two or more branch steam pipes are fixed to the main steam pipe, and one end of the branch steam pipe extends to the bottom wall of the heat-conducting plate.

[0008] Furthermore, a driven permanent magnet is fixedly connected to the connecting column, a pump channel and a liquid collecting chamber are opened on the working box, the bottom wall of the pump channel is connected to the top wall of the liquid collecting chamber through the connecting channel, the inner wall of the pump channel is slidably connected with a lifting centrifugal pump and a lifting permanent magnet, the lifting centrifugal pump and the lifting permanent magnet are fixed, the inner wall of the lifting centrifugal pump is rotatably connected with an impeller, an impeller shaft is fixedly connected to the impeller, the impeller shaft extends to the outside of the lifting centrifugal pump, a third worm gear is fixedly connected to the impeller shaft, the inner wall of the lifting centrifugal pump is rotatably connected with a second worm, 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 meshed with the second worm, a liquid outlet pipe and a liquid inlet pipe are fixedly connected to the lifting centrifugal pump, the lower end of the liquid inlet pipe extends to below the protective tube, and the lower end of the liquid outlet pipe extends into the connecting channel.

[0009] Furthermore, a first worm is fixedly connected to the top wall of the disc, the upper end of which is rotatably connected to the top wall of the evaporation chamber, an extension plate is fixedly connected to the inner wall of the evaporation chamber, a second worm wheel is rotatably connected to the extension plate, the second worm wheel is meshed with the first worm, the second worm wheel is fixedly connected to the fan blade, and the fan blade faces the main steam pipe.

[0010] Furthermore, the working box is provided with a first transmission chamber, a second transmission chamber and two rod channels, the inner wall of the evaporation chamber is slidably connected with a floating piece, a connecting rod is fixedly connected to the floating piece, the inner wall of the first transmission chamber is slidably connected with a sliding rod, the bottom wall of the sliding rod is fixedly connected to the upper end of the connecting rod, the bottom wall of the sliding rod is fixedly connected to the transmission rod, the lower end of the transmission rod is fixedly connected to a movable permanent magnet, the movable permanent magnet extends into the second transmission chamber, the inner wall of the rod channel is connected to the inner wall of the second transmission chamber through the magnet channel, the inner wall of the rod channel is slidably connected with a detection rod, the upper end of the detection rod is abutted against the elastic piece, the elastic piece is connected to the top wall of the rod channel, a limiting groove is provided on the detection rod, the lower end of the detection rod extends to the bottom wall of the heat conduction plate, the inner wall of the magnet channel is slidably connected with a limiting permanent magnet, one end of the limiting permanent magnet extends into the limiting groove, the heights of the two magnet channels are different, and the heights of the two limiting grooves are different.

[0011] Furthermore, a ball is rollingly connected to the limiting permanent magnet, and the ball is located in the limiting groove.

[0012] Furthermore, a liquid pump is fixedly connected to the bottom wall of the liquid collecting chamber, a liquid guide tube is fixedly connected to the liquid pump, and one end of the liquid guide tube extends into the evaporation chamber.

[0013] Furthermore, two guide columns are fixedly connected to the frame, and the lifting seat is slidably connected to the guide columns.

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

[0015] Furthermore, the outer wall of the antifreeze pile is coated with an asphalt hydrophobic layer.

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

[0017] The present invention can melt and clean the snow layer and melt and thaw the frozen soil layer through an integrated snow melting and soil thawing device, so that the resistance encountered by the drilling machine when drilling into the frozen soil layer is reduced, and the pile hole can be drilled more easily, thereby improving construction efficiency and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of a snow melting and soil thawing integrated device in a pile foundation construction method for preventing freezing and pulling out of the present invention;

[0020] Figure 2 The present invention Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 The present invention Figure 2 The enlarged view of point B in the middle;

[0022] Figure 4 The present invention Figure 2 Enlarged view of point C in the middle.

[0023] Figure numerals: 1, frame; 2, wheel assembly; 3, brake pad; 4, hydraulic cylinder; 5, piston rod; 6, lifting seat; 7, guide column; 8, working box; 9, connecting column; 10, driven 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 conduction plate; 22, motor body; 23, rotating rod; 24, disc; 25, rotating permanent magnet; 26, first worm; 27, first worm wheel; 28, heat conduction T 1. The first part is the first steam pipe; 2. The second worm gear; 3. The second worm gear; 3. The third worm gear; 3. The impeller shaft; 3. The lifting centrifugal pump; 3. The liquid outlet pipe; 3. The liquid inlet pipe; 4. The lifting permanent magnet; 4. The connecting channel; 4. The clean water; 4. The floating part; 4. The connecting rod; 4. The sliding rod; 4. The transmission rod; 4. The movable permanent magnet; 4. The detection rod; 4. The elastic part; 50. The limit groove; 51. The magnet channel; 52. The limit permanent magnet; 53. The branch steam pipe; 54. The liquid extraction pump. DETAILED DESCRIPTION

[0024] 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.

[0025] In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-Figure 4 As shown, a method for constructing a pile foundation with antifreeze pull-out comprises the following steps: positioning and marking the drilling position, wherein the marking may be performed by sprinkling colored powder other than white on 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 with a drilling machine to form a pile hole, and driving the antifreeze pull-out pile into the pile hole;

[0028] The integrated snow melting and soil thawing 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, a lifting seat 6 is fixedly connected to the lower end of the piston rod 5 on the hydraulic cylinder 4, a working box 8 is fixedly connected to the bottom wall of the lifting seat 6, a protective tube 11 is sleeved on the working box 8, 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, and connecting holes 13 are opened on the connecting plates 12, two connecting columns 9 are slidably connected to the lifting seat 6, and the two connecting columns 9 respectively pass through the two connecting holes 13, and a heating component is provided on the working box 8.

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

[0030] According to an optional embodiment of the present invention, the heating assembly includes 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 fixed to the bottom wall of the motor chamber 16, the rotating rod 23 is fixed to the rotor of the motor body 22, the disc 24 is fixed to the rotating rod 23, and the top wall of the disc 24 is inlaid with two or more The permanent magnet 25 is rotated, and the 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. 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-piece 28 is fixedly connected to the top wall of the heat-conducting plate 21. The horizontal section of the heat-conducting T-piece 28 is located above the disc 24. The inner wall of the evaporation cavity 15 is fixedly connected to the 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 material of the heat-conducting T-piece 28 and the heat-conducting plate 21 can be copper, which has good thermal conductivity and is very suitable as a heat-conducting component. The rotating permanent magnet 25 can be a neodymium magnet with extremely strong magnetism, thereby enhancing the efficiency of eddy current generation.

[0032] According to an optional embodiment of the present invention, a driven permanent magnet 10 is fixedly connected to the connecting column 9, a pump channel 14 and a liquid collecting chamber 20 are opened 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, the inner wall of the lifting centrifugal pump 37 is rotatably connected to an impeller, an impeller shaft 36 is fixedly connected to the impeller, the impeller shaft 36 extends to the outside of the lifting centrifugal pump 37, a third worm gear 35 is fixedly connected to the impeller shaft 36, the inner wall of the lifting centrifugal pump 37 is rotatably connected to a second worm 34, 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 meshed with the second worm 34, and 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. The liquid inlet of the liquid inlet pipe 39 can be arranged on the side wall of the liquid inlet pipe 39.

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

[0034] According to an optional embodiment of the present invention, a first worm 26 is fixedly connected to the top wall of the disc 24, and 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, and 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, and the second worm gear 30 is fixedly connected to the fan blade 31, and the fan blade 31 faces the main steam pipe 32.

[0035] According to an optional embodiment of the present invention, the working box 8 is provided with a first transmission chamber 17, a second transmission chamber 18 and two rod channels 19, the inner wall of the evaporation chamber 15 is slidably connected to a floating member 43, 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, 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 chamber 18, and the rod channels 19 are provided with a plurality of movable permanent magnets 47. The wall is connected to the inner wall of the second transmission chamber 18 through a magnet channel 51, and a detection rod 48 is slidably connected to the inner wall of the rod channel 19. The upper end of the detection rod 48 is against the elastic member 49, and 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, and the lower end of the detection rod 48 extends to the bottom wall of the heat conducting plate 21. The inner wall of the magnet channel 51 is slidably connected to a limiting permanent magnet 52, and 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 two magnet channels 51 have different heights, so that the two detection rods 48 can be dropped into the frozen soil layer for detection after a period of time.

[0037] According to an optional embodiment of the present invention, a ball is rollingly 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 the components.

[0038] According to an optional embodiment of the present invention, 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 .

[0039] According to an optional implementation 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] According to an optional 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] According to an optional embodiment of the present invention, the outer wall of the antifreeze pile is coated with an asphalt hydrophobic layer. The asphalt hydrophobic layer has anti-freeze expansion performance, which can improve the antifreeze pull performance of the antifreeze pile.

[0042] Implementation process of the integrated snow melting and soil thawing device: Move the frame 1 to the drilling position through the wheel assembly 2. At this time, the frozen soil layer is covered with a layer of snow. It is necessary to melt the snow layer first, then clean up the melted water, and then heat and soften the frozen soil layer.

[0043] The hydraulic cylinder 4 is turned on to extend the piston rod 5, and 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, and 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, and the third worm gear 35 disengages and engages with the second worm 34. The protective cylinder 11 is inserted into the snow layer and then into the frozen soil layer. Then the lifting permanent magnet 40 moves up to between the two driven permanent magnets 10, and the lifting permanent magnet 40 magnetically adsorbs the two driven permanent magnets 10, so that the two connecting columns 9 are close to each other and thus disengaged from the connecting hole 13, the connection between the working box 8 and the protective cylinder 11 is released, and the bottom wall of the heat conduction plate 21 abuts against the snow layer.

[0044] The motor body 22 is turned on, and 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 fan blade 31 to rotate. All the rotating permanent magnets 25 rotate at high speed, thereby generating eddy currents inside the thermal conductive T-piece 28, causing the thermal conductive T-piece 28 to generate heat. The heat of the thermal conductive T-piece 28 is transferred to the heat conductive plate 21, and the heat conductive plate 21 and the snow layer are offset to melt the snow layer into accumulated water.

[0045] The piston rod 5 is shortened, the working box 8 and the lifting seat 6 move up, and the protective cylinder 11 stays 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 to affect the subsequent drilling and piling. At the same time, water turbulence is prevented. The lifting permanent magnet 40 and the lifting centrifugal pump 37 do not move under the action of their own gravity, that is, the lifting permanent magnet 40 and the lifting centrifugal pump 37 move down relative to the working box 8, the lower end of the liquid inlet pipe 39 remains against the frozen soil layer, the impeller shaft 36 and the second worm 34 are re-engaged, and the motor body 22 drives the impeller shaft 36 rotates to rotate the impeller in the lifting centrifugal pump 37 to generate centrifugal force, the liquid inlet pipe 39 pumps the accumulated water to the liquid outlet pipe 38 for spraying, and the accumulated water falls into the liquid collecting chamber 20 through the connecting channel 41 for recycling, and the liquid pump 54 can be turned on to pump the accumulated water into the evaporation chamber 15 through the liquid guide pipe 33 to become clean water 42, recycling resources, and the heat-conducting T-piece 28 heats the clean water 42 to generate steam. The first worm 26 drives the second worm wheel 30 and the fan blade 31 to rotate, and the fan blade 31 blows the steam into the main steam pipe 32. Two or more branch steam pipes 53 on the main steam pipe 32 spray steam onto the frozen soil layer to heat and thaw the frozen soil layer, the liquid level of the clean water 42 gradually drops, and the floating member 43 also gradually moves down, and the floating member 43 drives the connecting rod 44, the sliding rod 45, the transmission rod 46, and the movable permanent magnet 47 to gradually move down. When the movable permanent magnet 47 moves down to the same horizontal plane as the upper limiting permanent magnet 52, the movable permanent magnet 47 magnetically attracts the limiting permanent magnet 52, so that the limiting permanent magnet 52 is separated from the limiting groove 50, and one of the detection rods 4 After losing the limit of the limit permanent magnet 52, the detection rod 48 moves downward rapidly under the action of the elastic force of the elastic member 49, and the detection rod 48 is inserted into the frozen soil layer. According to the depth of the detection rod 48 inserted into the frozen soil layer, it is judged whether the softening condition of the frozen soil layer meets the standard. If not, heating is continued, and the liquid level of the clean water 42 continues to move downward. When the movable permanent magnet 47 moves downward to the same horizontal plane as the limit permanent magnet 52 below, the same principle enables another detection rod 48 to be inserted into the frozen soil layer to judge whether the softening condition of the frozen soil layer meets the standard again.

[0046] The present invention can melt and clean the snow layer through an integrated snow melting and soil thawing device, and use a protective tube 11 to insert into the frozen soil layer to prevent external snow from entering the cleared frozen soil layer area and prevent the accumulated water generated by the melting of the snow layer from flowing out. The recovered accumulated water can be evaporated and the frozen soil layer can be melted and thawed by steam, so that the resistance encountered by the drilling machine when drilling into the frozen soil layer is reduced, pile holes can be drilled more easily, and construction efficiency is improved. Every time the frozen soil layer is heated for a period of time, a detection rod 48 can be automatically inserted into the frozen soil layer, so that the constructor can quickly determine whether the frozen soil layer has softened to the standard, thereby improving construction convenience.

[0047] The components, modules, mechanisms and devices not described in detail in the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution 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), 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), a lifting seat (6) is fixedly connected to the lower end of a piston rod (5) on the hydraulic cylinder (4), a working box (8) is fixedly connected to the bottom wall of the lifting seat (6), a protective tube (11) is sleeved on the working box (8), the bottom wall of the protective tube (11) has a lower height than the bottom wall of the working box (8), two connecting plates (12) are fixedly connected to the protective tube (11), a connecting hole (13) is provided on the connecting plate (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), and a heating assembly is provided on the working box (8).

2. A method for pile foundation construction against freezing and pulling according to claim 1, characterized in that: 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).

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

4. The method for pile foundation construction against freezing and pulling out according to claim 3 is 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 the main steam pipe (32).

5. The method for pile foundation construction against freezing and pulling out according to claim 4 is 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 chamber (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.

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

7. A method for pile foundation construction to prevent freezing and pulling out according to claim 6, 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).

8. The method for pile foundation construction against freezing and pulling out according to claim 7, 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).

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

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

Images