A soil sampling device for highway engineering

Abstract

The present invention discloses a soil sampling device for highway engineering, and relates to the technical field of soil sampling. The present invention includes a balancing component, wherein three groups of balancing components constitute an equilateral triangle structure as a whole, and each group of balancing components is movably provided with an adjustment component, and one end of each of the three groups of adjustment components is fixedly connected to a connecting hoop, and a driving component is fixedly provided on the top of the connecting hoop, and a drilling component is fixedly connected to the bottom of the driving component; the balancing component includes a base, a mounting part, a screw, a connecting shaft, and a locking sleeve, and the top of the base is fixedly connected to the mounting part, and a screw is movably provided inside the mounting part, and a through hole is provided on one side of the inner wall of the mounting part, and one end of the screw passes through the through hole and is fixedly connected to the connecting shaft, and slide grooves are provided on the opposite sides of the circumferential side of the connecting shaft, and the locking sleeve is movably provided inside the slide groove. The present invention can adjust the angle of each support rod, which can not only adjust the vertical angle between the drill barrel and the ground, but also adjust the height of the connecting hoop in a wide range.

Description

Technical Field

[0001] The invention belongs to the technical field of soil sampling, and in particular relates to a soil sampling device for highway engineering. Background Art

[0002] The task of building or reconstructing highways is determined according to the highway network planning. A country's highway construction should comprehensively consider its role and status in intermodal transport in combination with railway, waterway, aviation and other transportation, and formulate a national highway network planning divided by levels according to its political, military, economic, people's life and other needs, combined with geographical environment conditions; when carrying out highway construction, it is necessary to plan the route in advance, survey and measure the control points of the route, and select the route with the shortest distance, the least workload, the easiest project, the lowest cost, the least sequelae, the lowest maintenance cost and the greatest use benefit; when surveying the highway route, soil sampling must be carried out, and soil sampling equipment is required in the process of soil sampling.

[0003] The commonly used soil sampling devices at present usually use tools to knock the drill rod to make the sampling tube enter the deep soil layer. However, the drill rod is easy to be cleaned when drilling the soil, and is not inserted vertically into the soil layer. This kind of sampled soil has a certain error impact on subsequent exploration and research. In addition, the terrain is uneven during highway construction, and the general sampling device is not placed stably, resulting in instability of the drill bit during the drilling process, which is easy to damage the drill bit. After the sampling device is placed, it is in a fixed state and cannot be adjusted when sampling soil layers at different depths; and when the soil rises upward after sampling inside the soil layer, the sampled soil is easy to fall from the inside of the sampling tube.

[0004] The existing soil sampling device cannot be adjusted according to the soil sampling depth after being fixed. At the same time, the fixed state of the sampling device cannot be adjusted according to the terrain, making the fixation unstable. In addition, the sampling tube is easy to fall after being raised after soil sampling. For this reason, we propose a soil sampling device for highway engineering. Summary of the invention

[0005] The purpose of the present invention is to provide a soil sampling device for highway engineering, which solves the problem that the existing soil sampling device cannot be adjusted according to the soil sampling depth after being fixed, and the fixed state of the sampling device cannot be adjusted according to the terrain, making the fixation unstable, and the sampling tube is easy to fall after being raised after soil sampling.

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention relates to a soil sampling device for highway engineering, comprising a balancing component, wherein the balancing component has three groups, and the three groups of balancing components form an equilateral triangle structure as a whole, and each group of balancing components is movably provided with an adjusting component, and one end of the three groups of adjusting components is fixedly connected to a connecting hoop, and a driving component is fixedly provided on the top of the connecting hoop, and a drilling component is fixedly connected to the bottom of the driving component, and a clamping component is movably provided inside the drilling component; a movable groove is provided on the peripheral side surface of the connecting hoop, and three sliding blocks are movably provided inside the movable groove, and each sliding block is fixedly connected to a second universal joint; a through hole is provided inside the connecting hoop, and the drill barrel is movably provided inside the through hole, and the drill barrel is located at the center of the complete equilateral triangle structure formed by the three groups of balancing components.

[0008] The balancing assembly includes a base, a mounting piece, a screw, a connecting shaft and a locking sleeve, the top of the base is fixedly connected to the mounting piece, a screw is movably arranged inside the mounting piece, and a through hole is provided on one side of the inner wall of the mounting piece, one end of the screw passes through the through hole and is fixedly connected to the connecting shaft, sliding grooves are respectively provided on two opposite sides of the circumferential side surface of the connecting shaft, and the locking sleeve is movably arranged inside the sliding groove; a plurality of limit grooves are provided on the circumferential side surface of the mounting piece adjacent to the through hole, and limit blocks are respectively fixedly connected on two opposite sides of the circumferential side surface of the locking sleeve, and two limit blocks are respectively movably arranged inside the limit grooves; supporting nails are respectively fixedly connected at both ends of the bottom of the base, and the supporting nails are triangular nails; a rotating handle is provided on the base, and the rotating handle is fixedly connected to the connecting shaft.

[0009] The drilling assembly includes a drill barrel, an upper electromagnet and a lower electromagnet. The drill barrel is movably arranged inside the connecting hoop, and the upper and lower ends of the inner wall of the drill barrel are respectively fixedly connected with the upper electromagnet and the lower electromagnet; the drilling assembly also includes a battery, the battery is fixedly connected to the top of the inner wall of the drill barrel, the peripheral side of the battery is an inclined surface that is wide at the top and narrow at the bottom, the top of the peripheral side of the battery is fixedly connected to the upper electromagnet, and the peripheral side of the battery is movably connected to a plurality of upper iron sheets; a drill bit is fixedly connected to the bottom end of the drill barrel, and the drill bit is close to the position of the lower electromagnet, and the lower electromagnet is located above the lower iron sheet.

[0010] The clamping assembly has three groups, including elastic parts, clips, upper iron sheets, lower iron sheets, movable parts, springs and baffles. Each elastic part of the three groups of clamping assemblies is fixedly connected to the inner wall of the drill barrel, and are arranged in a circular array on the inner wall of the drill barrel. One end of each elastic part is fixedly connected to the clip, and the upper and lower ends of the outer wall of the clip are respectively fixedly connected to the upper iron sheet and the lower iron sheet. The clip is a cylinder, and three clips form a complete cylindrical shape. A spring is fixedly connected to the bottom of the clip, and the bottom end of the spring is fixedly connected to the baffle. One end of the baffle is fixedly connected to the movable part, and one end of the movable part is fixedly connected to the inner wall of the drill barrel; the baffle is one-third of a circle, and the three baffles form a complete circle, and the area of ​​the circle is consistent with the cross-sectional area of ​​the cylinder formed by the three clips; the upper iron sheet is located below the upper electromagnet.

[0011] Preferably, the adjustment assembly includes a sliding member, a first universal joint, a support rod and a second universal joint, the sliding member is movably connected to the side surface of the screw rod, and the top of the sliding member is fixedly connected to the first universal joint, one end of the first universal joint is fixedly connected to the bottom end of the support rod, the top end of the support rod is fixedly connected to the second universal joint, and the second universal joint is adjacent to the connecting hoop.

[0012] Preferably, the driving assembly includes a lifting rod, a connecting rod and a motor. There are two lifting rods, which are respectively fixedly connected to the opposite sides of the top of the connecting hoop, and each of the lifting rods is fixedly connected to a connecting rod. The two connecting rods are fixedly connected to the motor, and the bottom output end of the motor is fixedly connected to the drill barrel.

[0013] The present invention has the following beneficial effects:

[0014] 1. The present invention arranges a balancing assembly, and places three groups of balancing assemblies on the ground. The placement position and placement direction of the base can be adjusted at will according to the flatness of the ground, so that the sampling device can be fixed on the road surface in various situations, making the sampling process more stable, and avoiding the sampling assembly from tilting or even tipping over due to excessive vibration amplitude of the drilling machine during sampling, causing unnecessary losses. When the ground is flat, the three groups of balancing assemblies are placed in an equilateral triangle state, and the drill tube for sampling drills from the middle of the triangle into the soil layer, so that the drilling process is stable; when fixing the sampling device, the angular position of each support rod is adjusted in turn, so that the angle of the drill tube during drilling can be precisely adjusted, and the angle of each support rod can be adjusted, not only the vertical angle of the drill tube and the ground can be adjusted, but also the height of the connecting hoop can be adjusted in a wide range, so that the drilling depth of the drilling can be easily adjusted.

[0015] 2. The present invention arranges the clamping components into three groups, and utilizes the adsorption function of the electromagnet. After the electromagnet is energized, the clamp is indirectly adsorbed to make the clamp move obliquely upward. After the drilling is completed, the sampled soil enters the inside of the drill tube. After the electromagnet is turned off, the clamp loses its adsorption force, and the three clamps are reset obliquely downward to form a cylinder, which tightly clamps the sampled soil, making the soil clamping more stable and preventing the soil from becoming loose and affecting subsequent experiments. At the same time, when the three clamps are reset to form a cylinder, the three baffles at the bottom are driven by the compression spring to support the sampled soil to prevent the soil from scattering. Only by the adsorption function of the electromagnet, the sampled soil can be tightly clamped and supported. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the overall structure of the soil sampling device for highway engineering provided by the present invention;

[0018] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 For the present invention Figure 1 Enlarged view of point B in the middle;

[0020] Figure 4 For the present invention Figure 1 Enlarged view of point C in the middle;

[0021] Figure 5 A schematic diagram of the cross-sectional structure of a drill tube of a soil sampling device for highway engineering provided by the present invention;

[0022] Figure 6 For the present invention Figure 5 Enlarged view of point D in the middle;

[0023] Figure 7 For the present invention Figure 5 Enlarged view of point E in the middle;

[0024] Figure 8 A schematic diagram of the structure of the clamping assembly of the soil sampling device for highway engineering provided by the present invention;

[0025] Fig. 9 For the present invention Figure 8 Enlarged view of point F in the middle.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Base; 2. Support nails; 3. Mounting parts; 4. Screw rod; 5. Connecting shaft; 6. Rotating handle; 7. Locking sleeve; 8. Sliding part; 9. First universal joint; 10. Support rod; 11. Second universal joint; 12. Sliding block; 13. Connecting hoop; 14. Lifting rod; 15. Connecting rod; 16. Motor; 17. Drill barrel; 18. Battery; 19. Upper electromagnet; 20. Lower electromagnet; 21. Elastic part; 22. Clip; 23. Upper iron sheet; 24. Lower iron sheet; 25. Movable part; 26. Spring; 27. Baffle. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or 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.

[0031] See also Figure 1-9The present invention is a soil sampling device for highway engineering, including a balancing assembly, which has three groups of balancing assemblies. The three groups of balancing assemblies form an equilateral triangle structure as a whole. Each group of balancing assemblies is movably provided with an adjusting assembly. One end of the three groups of adjusting assemblies is fixedly connected to a connecting hoop 13. A driving assembly is fixedly provided on the top of the connecting hoop 13. A drilling assembly is fixedly connected to the bottom of the driving assembly. A clamping assembly is movably provided inside the drilling assembly. A movable groove is provided on the side surface around the connecting hoop 13. Three sliders 12 are movably provided inside the movable groove. Each slider 12 is fixedly connected to the second universal joint 11. Fixed connection; a through hole is opened inside the connecting hoop 13, and the drill barrel 17 is movably arranged inside the through hole. The drill barrel 17 is located at the center of the complete equilateral triangle structure composed of three groups of balancing components. The connecting hoop 13 fixes the drill barrel 17. The drilling depth of the drill barrel 17 is adjusted by adjusting the height of the connecting hoop 13. The slider 12 is used to slide in the movable groove on the side of the connecting hoop 13, so as to adjust the fixed position of the three groups of adjustment components and the balancing component. The second universal joint 11 is used to connect the support rod 10 and the connecting hoop 13 to facilitate the adjustment of the angle between them.

[0032] The balancing assembly includes a base 1, a mounting member 3, a screw rod 4, a connecting shaft 5 and a locking sleeve 7. The top of the base 1 is fixedly connected to the mounting member 3, a screw rod 4 is movably arranged inside the mounting member 3, and a through hole is opened on one side of the inner wall of the mounting member 3, one end of the screw rod 4 passes through the through hole and is fixedly connected to the connecting shaft 5, sliding grooves are opened on the opposite sides of the connecting shaft 5, and the locking sleeve 7 is movably arranged inside the sliding grooves; a plurality of limit grooves are opened on the side surfaces of the mounting member 3 adjacent to the through hole, and limited blocks are fixedly connected on the opposite sides of the locking sleeve 7, and the two limit blocks are movably arranged inside the limit grooves; supporting nails 2 are fixedly connected to the two ends of the bottom of the base 1, and the supporting nails 2 are triangular nails; a rotating handle 6 is arranged on the base 1, and the rotating handle 6 is fixedly connected to the connecting shaft 5. The base 1 is used to be placed on the ground to play a bearing and supporting role. The base 1 is a long board The equilateral triangle structure formed by the three bases 1 makes the overall fixation of the sampling device more stable. The support nails 2 are used to drill into the soil layer to fix the base 1 to prevent the base 1 from shifting during the sampling operation. The inside of the mounting member 3 is used to place the screw rod 4, which rotates inside the mounting member 3, thereby driving the sliding member 8 to slide on the surface of the screw rod 4. The connecting shaft 5 is connected to one end of the screw rod 4 and rotates with the screw rod 4. The screw rod 4 is rotated by shaking the rotating handle 6, and the sliding member 8 is driven to slide, thereby adjusting the height and horizontal angle of the connecting hoop 13, so that the drill tube 17 can drill vertically into the soil layer. When the balance and vertical angle are adjusted, the locking sleeve 7 is pushed to move the limit block on the surface of the locking sleeve 7 to the inside of the limit groove inside the mounting member 3. In this way, it is ensured that the screw rod 4 will not rotate at will.

[0033] The drilling assembly includes a drill tube 17, an upper electromagnet 19 and a lower electromagnet 20. The drill tube 17 is movably arranged inside the connecting hoop 13, and the upper and lower ends of the inner wall of the drill tube 17 are respectively fixedly connected with the upper electromagnet 19 and the lower electromagnet 20; the drilling assembly also includes a battery 18, which is fixedly connected to the top of the inner wall of the drill tube 17. The peripheral side of the battery 18 is an inclined surface that is wide at the top and narrow at the bottom. The top of the peripheral side of the battery 18 is fixedly connected to the upper electromagnet 19, and the peripheral side of the battery 18 is movably connected to a plurality of upper iron sheets 23; the drill tube A drill bit is fixedly connected to the bottom end of 17, and the drill bit is close to the position of the lower electromagnet 20. The lower electromagnet 20 is located above the lower iron sheet 24. The drill tube 17 is used to drill deep into the soil layer. After the upper electromagnet 19 and the lower electromagnet 20 are energized, they respectively adsorb the upper iron sheet 23 and the lower iron sheet 24, thereby pulling the clamp 22 obliquely upward. When the upper electromagnet 19 and the lower electromagnet 20 are powered off, they are no longer magnetic, and the clamp 22 returns to its original position. The three clamps 22 clamp the sampled soil therein to prevent the soil from falling from the bottom of the drill tube 17.

[0034] There are three groups of clamping components, including elastic members 21, clips 22, upper iron sheets 23, lower iron sheets 24, movable members 25, springs 26 and baffles 27. Each elastic member 21 of the three groups of clamping components is fixedly connected to the inner wall of the drill tube 17, and are arranged in a circular array on the inner wall of the drill tube 17. One end of each elastic member 21 is fixedly connected to the clip 22. The upper and lower ends of the outer wall of the clip 22 are respectively fixedly connected to the upper iron sheet 23 and the lower iron sheet 24. The clip 22 is 1 / 3 of a cylinder, and the three clips 22 form a complete cylindrical shape. The bottom of the clip 22 is fixedly connected to a spring 26, and the bottom end of the spring 26 is fixedly connected to the baffle 27. One end of the baffle 27 is fixedly connected to the movable member 25, and one end of the movable member 25 is fixedly connected to the inner wall of the drill tube 17; the baffle 27 is one-third of a circle, and the three baffles 27 form a complete circle, and the circular area is the same as the three clips 22 group The cross-sectional area of ​​the completed cylinder is consistent; the upper iron sheet 23 is located below the upper electromagnet 19, and the elastic member 21 plays an elastic role. When the electromagnet is energized, the elastic member 21 is compressed. When the electromagnet is de-energized, the elastic member 21 is reset, thereby driving the clamping piece 22 to reset, so that the three clamping pieces 22 form a complete cylindrical shape, thereby effectively clamping the sampled soil to prevent the soil from being loose and unable to maintain its shape in the soil layer. The upper iron sheet 23 and the lower iron sheet 24 are both used to adsorb the upper electromagnet 19 and the lower electromagnet 20, and the movable member 25 is used to drive the baffle 27 to rotate. When the baffle 27 is in a closed state, the spring 26 is in a compressed state. When the baffle 27 is opened, the spring 26 is in a normal state. When the clamping piece 22 loses its adsorption function, the spring 26 is compressed downward, thereby pressing one end of the baffle 27 downward, and the other end of the baffle 27 rises, and the three baffles 27 are closed.

[0035] Among them, the adjustment component includes a sliding member 8, a first universal joint 9, a support rod 10 and a second universal joint 11. The sliding member 8 is movably connected to the side of the screw rod 4, and the top of the sliding member 8 is fixedly connected to the first universal joint 9. One end of the first universal joint 9 is fixedly connected to the bottom end of the support rod 10, and the top of the support rod 10 is fixedly connected to the second universal joint 11. The second universal joint 11 is adjacent to the connecting hoop 13. The sliding member 8 slides back and forth on the surface of the screw rod 4, thereby driving the support rod 10 to change the support height. The settings of the first universal joint 9 and the second universal joint 11 allow the support rod 10 to move in all directions. The three support rods 10 jointly support the drilling assembly. By adjusting the height and position of the three support rods 10, the angle between the drilling assembly and the soil layer is changed to make it perpendicular to the soil layer.

[0036] Among them, the driving assembly includes a lifting rod 14, a connecting rod 15 and a motor 16. There are two lifting rods 14, which are respectively fixedly connected to the opposite sides of the top of the connecting hoop 13, and each lifting rod 14 is fixedly connected with a connecting rod 15. The two connecting rods 15 are fixedly connected to the motor 16. The bottom output end of the motor 16 is fixedly connected to the drill barrel 17. The lifting rod 14 is used to drive the drilling assembly to drill into the soil layer. The connecting rod 15 is used to be fixedly connected to the motor 16, and the motor 16 is used to drive the drill barrel 17 to drill downward.

[0037] The working principle of the present invention is as follows: when in use, unfold the three bases 1, place the three bases 1 around an equilateral triangle, and then adjust the position of each base 1 according to the terrain so that the three bases 1 are all stably placed on the ground, pull out the locking sleeve 7 located inside the slide groove, turn the rotating handle 6 to drive the screw rod 4 to rotate, thereby driving the sliding member 8 to move on the surface of the screw rod 4, and adjust the angles of the three support rods 10 in turn so that the connecting hoop 13 is in a state relatively parallel to the ground. At this time, the drill tube 17 is perpendicular to the ground, start the motor 16 to drive the drill tube 17 to rotate, start the lifting rod 14 to drive the drill tube 17 to drill slowly into the soil layer, and after drilling to a certain depth, the motor 16 and the lifting rod 14 stop driving, and the drilling process The middle battery 18 energizes the upper electromagnet 19 and the lower electromagnet 20, so that the upper iron sheet 23 and the remaining iron sheet 24 are respectively adsorbed on the upper electromagnet 19 and the lower electromagnet 20, and at the same time, the clip 22 is guided to move obliquely upward, squeezing the elastic member 21, and the spring 26 is in an uncompressed state; when the drilling is completed, the battery 18 is powered off, and the clip 22 without adsorption force is affected by the reset of the elastic member 21 and moves obliquely downward, thereby compressing the spring 26 and driving the baffle 27 to rotate, and the three baffles 27 form a closed state. At this time, the cylinder surrounded by the three clips 22 and the closed three baffles 27 tightly surround the sampled soil, and the lifting rod 14 is driven to lift the drill tube 17 to complete the soil sampling operation.

[0038] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A soil sampling device for highway engineering, characterized in that: It comprises a balancing assembly, wherein the balancing assembly has three groups, and the three groups of balancing assemblies form an equilateral triangle structure as a whole. Each group of balancing assemblies is movably provided with an adjustment assembly, and one end of the three groups of adjustment assemblies is fixedly connected to a connecting hoop (13). A driving assembly is fixedly provided on the top of the connecting hoop (13), and a drilling assembly is fixedly connected to the bottom of the driving assembly. A clamping assembly is movably provided inside the drilling assembly. A movable groove is provided on the peripheral side surface of the connecting hoop (13), and three sliding blocks (12) are movably provided inside the movable groove, and each sliding block (12) is fixedly connected to a second universal joint (11). The balancing assembly comprises a base (1), a mounting member (3), a screw rod (4), a connecting shaft (5) and a locking sleeve (7); the top of the base (1) is fixedly connected to the mounting member (3); a screw rod (4) is movably arranged inside the mounting member (3); a through hole is provided on one side of the inner wall of the mounting member (3); one end of the screw rod (4) passes through the through hole and is fixedly connected to the connecting shaft (5); two opposite sides of the peripheral side of the connecting shaft (5) are respectively provided with sliding grooves; the locking sleeve (7) is movably arranged inside the sliding grooves; a plurality of limiting grooves are provided on the peripheral side of the mounting member (3) adjacent to the through hole; two opposite sides of the peripheral side of the locking sleeve (7) are respectively fixedly connected to limiting blocks; two limiting blocks are movably arranged inside the limiting grooves; The drilling assembly comprises a drill tube (17), an upper electromagnet (19) and a lower electromagnet (20); the drill tube (17) is movably arranged inside the connecting hoop (13), and the upper and lower ends of the inner wall of the drill tube (17) are respectively fixedly connected with the upper electromagnet (19) and the lower electromagnet (20); The clamping assembly has three groups, including an elastic member (21), a clamping piece (22), an upper iron sheet (23), a lower iron sheet (24), a movable member (25), a spring (26) and a baffle (27). Each elastic member (21) of the three groups of the clamping assemblies is fixedly connected to the inner wall of the drill tube (17) and is arranged in an annular array on the inner wall of the drill tube (17). One end of each elastic member (21) is fixedly connected to the clamping piece (22). The upper and lower ends of the outer wall of the clamping piece (22) are respectively fixedly connected to the upper iron sheet (23) and the lower iron sheet (24). The clamping piece (22) is a 1 / 3 cylinder. The three The clamping piece (22) forms a complete cylindrical shape, a spring (26) is fixedly connected to the bottom of the clamping piece (22), the bottom end of the spring (26) is fixedly connected to a baffle (27), one end of the baffle (27) is fixedly connected to a movable member (25), and one end of the movable member (25) is fixedly connected to the inner wall of the drill tube (17); the baffle (27) is one-third of a circle, three baffles (27) form a complete circle, and the area of ​​the circle is consistent with the cross-sectional area of ​​the cylinder formed by the three clamping pieces (22); the upper iron sheet (23) is located below the upper electromagnet (19); The adjustment assembly comprises a sliding member (8), a first universal joint (9), a support rod (10) and a second universal joint (11); the sliding member (8) is movably connected to the side surface of the screw rod (4), and the top of the sliding member (8) is fixedly connected to the first universal joint (9); one end of the first universal joint (9) is fixedly connected to the bottom end of the support rod (10); the top end of the support rod (10) is fixedly connected to the second universal joint (11); and the second universal joint (11) is adjacent to the connecting hoop (13).

2. A soil sampling device for highway engineering according to claim 1, characterized in that: The two ends of the bottom of the base (1) are respectively fixedly connected with supporting nails (2), and the supporting nails (2) are triangular nails; a rotating handle (6) is provided on the base (1), and the rotating handle (6) is fixedly connected to the connecting shaft (5).

3. A soil sampling device for highway engineering according to claim 2, characterized in that: The driving assembly comprises a lifting rod (14), a connecting rod (15) and a motor (16). There are two lifting rods (14), and the two lifting rods (14) are respectively fixedly connected to opposite sides of the top of the connecting hoop (13), and each of the lifting rods (14) is fixedly connected to a connecting rod (15). The two connecting rods (15) are fixedly connected to the motor (16), and the bottom output end of the motor (16) is fixedly connected to the drill tube (17).

4. A soil sampling device for highway engineering according to claim 3, characterized in that: The drilling assembly also includes a battery (18), the battery (18) is fixedly connected to the top of the inner wall of the drill tube (17), the peripheral side of the battery (18) is an inclined surface that is wider at the top and narrower at the bottom, the top of the peripheral side of the battery (18) is fixedly connected to the upper electromagnet (19), and the peripheral side of the battery (18) is movably connected to a plurality of upper iron sheets (23).

5. A soil sampling device for highway engineering according to claim 4, characterized in that: A drill bit is fixedly connected to the bottom end of the drill tube (17), and the drill bit is close to the position of the lower electromagnet (20), and the lower electromagnet (20) is located above the lower iron sheet (24).

6. A soil sampling device for highway engineering according to claim 5, characterized in that: A through hole is provided inside the connecting hoop (13), and the drill tube (17) is movably arranged inside the through hole. The drill tube (17) is located at the center of a complete equilateral triangle structure formed by three groups of balancing components.

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