Sand taking device for geotechnical engineering detection

Abstract

The utility model discloses a sand taking device for geotechnical engineering detection, which relates to the technical field of sand taking equipment and comprises an L-shaped support plate, a horizontal mounting plate, a pedal, an I-shaped movable table, a drilling barrel, a drilling rod, a first operating mechanism, a second operating mechanism and a sliding mechanism, the I-shaped movable table is driven by the sliding mechanism to slide, and the drilling rod is driven by the first operating mechanism to rotate. According to the sand taking device, the defect that in the prior art, an engineering vehicle is needed for drilling sandy soil is overcome, the sand taking device does not depend on the engineering vehicle, one worker can conduct sand taking operation on a target area, in the sand taking process, the working efficiency is greatly improved, and the labor intensity of workers is reduced. The second operating mechanism provides a working mode of pulling out the drill rod in a more labor-saving mode for workers, and the drill rod pulling device has a good using effect in a hard geological area where the drill rod is difficult to pull out.

Description

TECHNICAL FIELD

[0001] The utility model relates to sand taking equipment technical field, concretely relates to a sand taking device for geotechnical engineering detection. BACKGROUND

[0002] In geotechnical engineering operation, geological detection of target region is a necessary work link, and sand taking inspection of target region is the most conventional address inspection means, and through component analysis of taken sand, geological components and water content parameters in the region can be judged.

[0003] The sand taking device in the prior art is usually dependent on heavy engineering machinery, and the sand taking rod is drilled into the geotechnical engineering through the hydraulic motor, this way is inconvenient to move, especially when the road surface is uneven, the engineering vehicle is difficult to run, so that the sand taking work is not convenient, and the operator needs to be familiar with the structure and console of the sand taking device, and can skillfully use various controller devices, such as throttle, brake, oil circuit switch, etc., which increases the training cost.

[0004] In order to solve the above problems, a sand taking device for geotechnical engineering is provided, which can avoid using engineering machinery and is convenient to use. SUMMARY

[0005] The utility model provides a sand taking device for geotechnical engineering detection according to the above problems, solves the sand taking device in the prior art usually depends on heavy engineering machinery, and the sand taking rod is drilled into the geotechnical engineering through the hydraulic motor, this way is inconvenient to move, especially when the road surface is uneven, the engineering vehicle is difficult to run, so that the sand taking work is not convenient, and the operator needs to be familiar with the structure and console of the sand taking device, and can skillfully use various controller devices, such as throttle, brake, oil circuit switch, etc., which increases the training cost.

[0006] The utility model adopts the technical scheme that contains L type support board, horizontal installation board, pedal, I -shaped movable platform, drill barrel, drill rod, first operating mechanism, second operating mechanism, sliding mechanism;

[0007] The same I -shaped movable platform is movably arranged between the vertical plates of the two L type support boards, and the two vertical plates of the I -shaped movable platform are slidably arranged on the inner walls of the vertical plates of the two L type support boards respectively;

[0008] The I -shaped movable platform is driven to slide through the sliding mechanism;

[0009] The lower end of the horizontal plate of the I-shaped movable platform is detachably provided with a drill barrel, and a drill rod is movably provided inside the drill barrel. The drill rod is driven to rotate by the first operating mechanism.

[0010] The drill rod drives the sliding mechanism to work by rotating;

[0011] Each of the two L-shaped support plates has a foot pedal on its front side, and the same horizontal mounting plate is provided between the two foot pedals. The drill barrel is movably located on the rear side of the horizontal mounting plate.

[0012] The upper end of the horizontal mounting plate is provided with a second operating mechanism for lifting the drill barrel.

[0013] Furthermore, the sliding mechanism includes a T-shaped slide rail, a T-shaped slide groove, and rollers;

[0014] T-shaped slide rails are fixedly provided on the inner walls of the vertical plates of the two L-shaped support plates, and T-shaped slide grooves that cooperate with the T-shaped slide rails are provided on the outer walls of the two vertical plates of the I-shaped movable platform.

[0015] The two T-shaped slide rails are respectively slidably disposed in the T-shaped slide grooves adjacent to them;

[0016] Several rollers are provided on the side walls of the two T-shaped slides, and the rollers roll on the inner wall of the cross plate of the adjacent T-shaped slide rail.

[0017] Furthermore, the operating mechanism is a rotating disk;

[0018] The upper end of the drill rod is fixedly provided with a rotating shaft, which rotates through the horizontal plate of the I-shaped movable platform and is fixedly connected to the lower center of the rotating disk.

[0019] Furthermore, the second operating mechanism includes a first rectangular slider, a first connecting frame, a second connecting frame, a first connecting rod, a second connecting rod, a handle, an L-shaped movable rod, a rectangular block, a connecting block, and a second rectangular slider;

[0020] The upper end of the horizontal mounting plate is provided with a rectangular sliding groove, and a first rectangular slider is slidably disposed in the rectangular sliding groove;

[0021] The upper end of the first rectangular slider is fixedly provided with a first connecting frame, and the first end of the first connecting rod is rotatably provided inside the first connecting frame;

[0022] A second connecting frame is fixedly provided in the middle of the front wall of the horizontal plate of the I-shaped movable platform;

[0023] The second end of the first connecting rod is rotatably disposed within the second connecting frame;

[0024] Rectangular blocks are fixedly provided at the upper ends of the horizontal plates of the two L-shaped support plates, and the two rectangular blocks are fixedly provided on the outer wall of the vertical plate of the adjacent L-shaped support plate.

[0025] Each of the two rectangular blocks has a rectangular through hole;

[0026] The two rectangular through holes are respectively equipped with horizontal bars with L-shaped movable rods, and the vertical bars of the two L-shaped movable rods are respectively movably arranged on the rear side of the rectangular block that is close to them;

[0027] Connecting blocks are fixedly provided on the upper part of the crossbar ends of the two L-shaped movable rods respectively;

[0028] The inner walls of the two connecting blocks are respectively fixedly connected by a first connecting shaft and the outer wall of the first connecting frame adjacent to it;

[0029] The vertical rods of the two L-shaped movable rods are each provided with a rectangular through groove;

[0030] A second rectangular slider is slidably disposed in each of the two rectangular through slots, and a second connecting shaft is fixedly disposed on the outer wall of each of the two second rectangular sliders;

[0031] The first ends of the second connecting rods are respectively rotatably sleeved on the outer walls of the two second connecting shafts;

[0032] A third connecting shaft is fixedly provided on the outer wall of the vertical plate of each of the two L-shaped support plates, and the middle ends of the two second connecting rods are respectively rotatably sleeved on the outer wall of the third connecting shaft that is close to them.

[0033] Each of the two second connecting rods has a handle on the outer wall of its second end.

[0034] Furthermore, both pedals are equipped with rubber pads to increase friction.

[0035] Furthermore, the bottom of the drill barrel has a conical structure to facilitate sinking into the soil.

[0036] Advantages of this utility model:

[0037] This invention avoids the drawbacks of traditional methods that require engineering vehicles to drill for sand extraction. It does not rely on engineering vehicles and allows one worker to carry out sand extraction operations in the target area. During the sand extraction process, the second operating mechanism provides the worker with a more labor-saving way to pull out the drill rod. It has a good effect when facing geological areas where the drill rod is relatively hard and difficult to pull out.

[0038] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages, which will be further described in detail below with reference to the figures. Attached Figure Description

[0039] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0040] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0041] Figure 2 This is a schematic diagram of the overall structure of the L-shaped support plate of this utility model;

[0042] Figure 3 This is a schematic diagram of the overall structure of the I-shaped movable platform of this utility model;

[0043] Figure 4 This is a schematic diagram showing the installation position of the horizontal mounting plate of this utility model;

[0044] Figure 5 This is a schematic diagram of the overall structure of the second operating mechanism of this utility model;

[0045] Figure 6 This is a front view of the overall structure of this utility model;

[0046] Figure 7 This is a schematic diagram illustrating the working principle of the second operating mechanism of this utility model;

[0047] Figure 8 This is a schematic diagram showing two working states of this utility model.

[0048] Figure label:

[0049] 1 is an L-shaped support plate, 2 is a rectangular block, 3 is a horizontal mounting plate, 4 is a pedal, 5 is an L-shaped movable rod, 6 is a second connecting rod, 7 is a handle, 8 is an I-shaped movable platform, 9 is a rotating disk, 10 is a first rectangular slider, 11 is a first connecting rod, 12 is a drill barrel, 13 is a first connecting shaft, 14 is a second rectangular slider, and 15 is a drill rod.

[0050] 101 is a T-shaped slide rail;

[0051] 201 is a rectangular through hole

[0052] 301 is a rectangular groove;

[0053] 501 is a rectangular through slot, and 502 is a connecting block;

[0054] 801 is a T-shaped groove, and 802 is a second connecting rod;

[0055] 1001 is the first connecting frame. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0057] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0058] refer to Figures 1 to 8 A sand sampler for geotechnical engineering testing includes an L-shaped support plate 1, a horizontal mounting plate 3, a foot pedal 4, an I-shaped movable platform 8, a drill barrel 12, a drill rod 15, a first operating mechanism, a second operating mechanism, and a sliding mechanism.

[0059] The same I-shaped movable platform 8 is movably installed between the vertical plates of the two L-shaped support plates 1. The two vertical plates of the I-shaped movable platform 8 are slidably installed on the inner wall of the vertical plate of the L-shaped support plate 1 that is close to it.

[0060] The I-shaped movable platform 8 is driven to slide by a sliding mechanism;

[0061] A drill barrel 12 is detachably installed at the lower end of the horizontal plate of the I-shaped movable platform 8. A drill rod 15 is movably installed inside the drill barrel 12. The drill rod 15 is driven to rotate by the first operating mechanism.

[0062] The drill rod 15 operates by rotating and driving the sliding mechanism;

[0063] Two L-shaped support plates 1 are respectively equipped with pedals 4 on the front side of the horizontal plate, and the same horizontal mounting plate 3 is installed between the two pedals 4. The drill barrel 12 is movably installed on the rear side of the horizontal mounting plate 3.

[0064] The upper end of the horizontal mounting plate 3 is equipped with a second operating mechanism for lifting the drill barrel 12. Two L-shaped support plates 1 are used to fix the equipment to the ground and increase its stability during operation. Two pedals 4 increase the adhesion between the equipment and the ground when the operator steps on them. The user can drive the drill rod 15 by operating the first operating mechanism. After the drill rod 15 is driven down into the soil by the first operating mechanism, the I-shaped movable platform 8 will drive the drill barrel 12 down. After the I-shaped movable platform 8 moves to the bottom, the drill rod 15 and the drill barrel 12 are full of samples. At this time, the drill barrel 12 can be pulled up with little effort by the second operating mechanism to collect the samples.

[0065] The sliding mechanism includes a T-shaped slide rail 101, a T-shaped slide groove 801, and rollers;

[0066] T-shaped slide rails 101 are fixedly installed on the inner walls of the vertical plates of the two L-shaped support plates 1, and T-shaped slide grooves 801 that cooperate with the T-shaped slide rails 101 are respectively provided on the outer walls of the two vertical plates of the I-shaped movable platform 8.

[0067] Two T-shaped slide rails 101 are slidably installed in the adjacent T-shaped slide grooves 801;

[0068] Several rollers are installed on the side walls of the two T-shaped slide rails 801. The rollers are rolled on the inner wall of the cross plate of the adjacent T-shaped slide rail 101. The cooperation between the T-shaped slide rails 101 on both sides and the T-shaped slide rails 801 on both sides limits the sliding trajectory of the I-shaped movable table 8, so that it can only maintain vertical movement. The rollers reduce the friction between the slide rail and the slide rail, so that it can slide more effortlessly.

[0069] The operating mechanism is a rotating disk 9;

[0070] A rotating shaft is fixedly installed at the upper end of the drill rod 15. The rotating shaft rotates through the horizontal plate of the I-shaped movable platform 8 and is fixedly connected to the lower center of the rotating disk 9. By operating the rotating disk 9, the rotating disk 9 will drive the drill rod 15, which is fixedly installed on the same axis, to start rotating. The drill rod 15 is a spiral drill rod. After it first enters the rock and soil, the L-shaped support plates 1 on both sides will slowly sink into the rock and soil as it rotates in. Since the rotating shaft is only installed inside the horizontal plate of the I-shaped movable platform 8, as the drill rod 15 drives the rotating shaft to go down, the I-shaped movable platform 8 and the drill barrel 12 will start to move downward. The drill barrel 12 will sink into the rock and soil as it moves downward. When the spiral drill rod rotates into the rock and soil, the sand inside will be wrapped by the drill barrel 12 and placed on each layer of the spiral drill rod's threads, thereby achieving the collection function. Preferably, if this process is to be completed more labor-savingly, the rotating disk 9 can be replaced with a drive motor.

[0071] The second operating mechanism includes a first rectangular slider 10, a first connecting frame 1001, a second connecting frame 802, a first connecting rod 11, a second connecting rod 6, a handle 7, an L-shaped movable rod 5, a rectangular block 2, a connecting block 502, and a second rectangular slider 14.

[0072] The upper end of the horizontal mounting plate 3 is provided with a rectangular slide groove 301, and a first rectangular slider 10 is slidably installed in the rectangular slide groove 301.

[0073] The upper end of the first rectangular slider 10 is fixedly installed with a first connecting frame 1001, and the first end of the first connecting rod 11 is rotatably installed inside the first connecting frame 1001.

[0074] A second connecting frame 802 is fixedly installed in the middle of the front wall of the horizontal plate of the I-shaped movable platform 8;

[0075] The second end of the first connecting rod 11 is rotatably mounted inside the second connecting frame 802;

[0076] Rectangular blocks 2 are fixedly installed on the upper ends of the horizontal plates of the two L-shaped support plates 1 respectively, and the two rectangular blocks 2 are fixedly installed on the outer wall of the vertical plate of the L-shaped support plate 1 that is close to it.

[0077] Each of the two rectangular blocks 2 has a rectangular through hole 201.

[0078] Two rectangular through holes 201 each have a horizontal bar with an L-shaped movable rod 5 that is slidably installed inside them, and the vertical bars of the two L-shaped movable rods 5 are respectively movably installed on the rear side of the rectangular block 2 that is close to them.

[0079] Connecting blocks 502 are fixedly installed on the upper part of the crossbar ends of the two L-shaped movable rods 5 respectively;

[0080] The inner walls of the two connecting blocks 502 are fixedly connected by the first connecting shaft 13 and the outer wall of the first connecting frame 1001 adjacent to it, respectively.

[0081] Rectangular through slots 501 are provided on the vertical rods of the two L-shaped movable rods 5 respectively;

[0082] Two rectangular through slots 501 are respectively slidably installed with second rectangular sliders 14, and second connecting shafts are respectively fixedly installed on the outer walls of the two second rectangular sliders 14.

[0083] The first ends of the second connecting rods 6 are rotatably mounted on the outer walls of the two second connecting shafts, respectively.

[0084] A third connecting shaft is fixedly installed on the outer wall of the vertical plate of the two L-shaped support plates 1 respectively, and the middle ends of the two second connecting rods 6 are respectively rotatably fitted onto the outer wall of the third connecting shaft that is close to them;

[0085] Handles 7 are rotatably mounted on the outer walls of the second ends of the two second connecting rods 6, for reference. Figure 8A. When the rotating disk 9 reaches its limit position, the I-shaped movable platform 8 moves downwards to a position flush with the ground. At this time, both the drill rod 15 and the drill barrel 12 are completely embedded below the rock and soil. The user holds the handles 7 on both sides and rotates the second connecting rods 6 downwards. The second connecting rods 6 on both sides begin to rotate counterclockwise around their respective middle ends as the rotation center. During the counterclockwise rotation, the second connecting rods 6 on both sides will drive the adjacent second rectangular sliders 14 to also begin to rotate counterclockwise. Since the sliding trajectory of the second rectangular sliders 14 on both sides is always limited to... In the corresponding rectangular through groove 501, the second rectangular sliders 14 on both sides slide upward along the corresponding rectangular through groove 501 during counterclockwise rotation. As the second rectangular sliders 14 slide upward, they simultaneously drive the L-shaped movable rods 5 on both sides to slide backward. The cooperation between the rectangular through hole 201 and the crossbar of the L-shaped movable rod 5 limits the sliding trajectory of the L-shaped movable rod 5, ensuring that it does not deviate or fall off during sliding. As the L-shaped movable rods 5 on both sides slide backward, they simultaneously drive the connecting blocks 502 fixed to them to slide backward. The first connecting frame 1001, which is fixedly connected to the two connecting blocks 502 via the first connecting shaft 13, can also begin to slide backward with the cooperation of the first rectangular slider 10 and the rectangular slide groove 301. As the first rectangular slider 10 slides backward, the first connecting rod 11 located inside the first connecting frame 1001 begins to deflect upward. The upward deflection of the first connecting rod 11 can drive the I-shaped movable table 8 to begin to slide upward. The drill barrel 12 connected to the I-shaped movable table 8 can then slide upward until it leaves the ground. The drill barrel 12 can form a threaded connection with the I-shaped movable table 8. Quick disassembly involves unscrewing the drill barrel 12 to expose the drill rod 15 and the sample soil and rock located on each layer of the drill rod 15's threads. During this process, the force pulling the drill barrel 12 upward comes from the first rectangular slider 10, and the force of the first rectangular slider 10 comes from the pulling force generated by the two L-shaped movable rods 5 on both sides. The pulling force of the two L-shaped movable rods 5 on both sides is generated by the user pressing down on the two second connecting rods 6 with the third connecting shaft as the rotation fulcrum. The downward pressure applied by the user to the second connecting rods 6 during rotation can increase the rotational power arm, thus realizing the lever principle and saving more effort.

[0086] Both pedals 4 are equipped with rubber pads to increase friction. Their function is to increase the friction when the user steps on the pedals 4 with both feet to prevent falls.

[0087] The bottom of the drill barrel 12 has a conical structure to facilitate its insertion into the soil. Its function is to make it easier for the drill barrel 12 to be inserted into the rock and soil.

[0088] The implementation method of this utility model:

[0089] Place this device above the target area, with the device positioned as follows:Figure 8 In the initial state shown in B, the I-shaped movable platform 8 is located at the top of the vertical plate of the two L-shaped support plates 1, and the drill rod 15 and drill barrel 12 are both located above the target area.

[0090] The user fixes the equipment to the ground by stepping into the pedals 4 on both sides. The rotating disk 9 is started to rotate, which drives the drill rod 15 to rotate. After the drill rod 15 drills into the rock and soil, the equipment will not be pushed up due to the user's stepping. Therefore, as the drill rod 15 rotates, it will slowly sink into the rock and soil. As the drill rod 15 spirals downward into the rock and soil, the I-shaped movable platform 8 drives the drill barrel 12 to sink into the rock and soil as well.

[0091] After drill rod 15 and drill barrel 12 are completely submerged under the rock and soil, as Figure 8 As shown in Figure A, the second connecting rods 6 on both sides are lifted upwards. At this time, the user holds the handles 7 on both sides with both hands and presses the second connecting rods 6 on both sides downwards. Through the lever principle, the I-shaped movable platform 8 is lifted upwards with little effort. Since the drill rod does not rotate at this time, the collected rock and soil samples will be concentrated on the threads on the side wall of the drill rod 15 and will be wrapped by the drill barrel 12 and will not fall off.

[0092] Once the drill barrel 12 is completely detached from the ground, it will be like... Figure 8 As shown in B, at this time, the drill barrel 12 is unscrewed from below the horizontal plate of the I-shaped movable platform 8, which will expose the rock and soil sample located on the drill rod 15. At this time, the rock and soil sample on the drill rod 15 can be collected.

[0093] This invention avoids the drawbacks of traditional methods that require engineering vehicles to drill for sand extraction. It does not rely on engineering vehicles and allows one worker to carry out sand extraction operations in the target area. During the sand extraction process, the second operating mechanism provides the worker with a more labor-saving way to pull out the drill rod. It has a good effect when facing geological areas where the drill rod is relatively hard and difficult to pull out.

[0094] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sand sampler for geotechnical engineering testing, characterized in that: it comprises an L-shaped support plate (1), a horizontal mounting plate (3), a foot pedal (4), an I-shaped movable platform (8), a drill barrel (12), a drill rod (15), a first operating mechanism, a second operating mechanism, and a sliding mechanism; The same I-shaped movable platform (8) is movably provided between the vertical plates of the two L-shaped support plates (1), and the two vertical plates of the I-shaped movable platform (8) are respectively slidably provided on the inner wall of the vertical plate of the L-shaped support plate (1) that is close to it; The I-shaped movable platform (8) is driven to slide by a sliding mechanism; The lower end of the horizontal plate of the I-shaped movable platform (8) is detachably provided with a drill barrel (12), and a drill rod (15) is movably provided inside the drill barrel (12). The drill rod (15) is driven to rotate by the first operating mechanism. The drill rod (15) drives the sliding mechanism to work by rotating; The two L-shaped support plates (1) are respectively provided with pedals (4) on the front side of the horizontal plate, and the two pedals (4) are provided with the same horizontal mounting plate (3). The drill barrel (12) is movably provided on the rear side of the horizontal mounting plate (3). The upper end of the horizontal mounting plate (3) is provided with a second operating mechanism for lifting the drill barrel (12).

2. The sand sampler for geotechnical engineering testing according to claim 1, characterized in that: the sliding mechanism includes a T-shaped slide rail (101), a T-shaped slide groove (801), and rollers; T-shaped slide rails (101) are fixedly provided on the inner walls of the vertical plates of the two L-shaped support plates (1), and T-shaped slide grooves (801) that cooperate with the T-shaped slide rails (101) are provided on the outer walls of the two vertical plates of the I-shaped movable platform (8). The two T-shaped slide rails (101) are respectively slidably disposed in the T-shaped slide grooves (801) adjacent to them; Several rollers are provided on the side walls of the two T-shaped slides (801), and the rollers are rolled on the inner wall of the cross plate of the T-shaped slide rail (101) that is close to them.

3. The sand sampler for geotechnical engineering testing according to claim 2, characterized in that: the operating mechanism is a rotating disk (9); The upper end of the drill rod (15) is fixedly provided with a rotating shaft, which rotates through the horizontal plate of the I-shaped movable platform (8) and is fixedly connected to the lower center of the rotating disk (9).

4. The sand sampler for geotechnical engineering testing according to claim 1, characterized in that: the second operating mechanism includes a first rectangular slider (10), a first connecting frame (1001), a second connecting frame (802), a first connecting rod (11), a second connecting rod (6), a handle (7), an L-shaped movable rod (5), a rectangular block (2), a connecting block (502), and a second rectangular slider (14). The upper end of the horizontal mounting plate (3) is provided with a rectangular slide groove (301), and a first rectangular slider (10) is slidably disposed in the rectangular slide groove (301). The upper end of the first rectangular slider (10) is fixedly provided with a first connecting frame (1001), and the first end of the first connecting rod (11) is rotatably provided inside the first connecting frame (1001); The second connecting frame (802) is fixedly provided in the middle of the front wall of the horizontal plate of the I-shaped movable platform (8). The second end of the first connecting rod (11) is rotatably disposed within the second connecting frame (802); Rectangular blocks (2) are fixedly provided on the upper ends of the horizontal plates of the two L-shaped support plates (1), and the two rectangular blocks (2) are fixedly provided on the outer wall of the vertical plate of the L-shaped support plate (1) that are close to it; Each of the two rectangular blocks (2) is provided with a rectangular through hole (201); The horizontal bars with L-shaped movable rods (5) are slidably passed through the two rectangular through holes (201), and the vertical bars of the two L-shaped movable rods (5) are respectively movably arranged on the rear side of the rectangular block (2) that is close to them; Connecting blocks (502) are fixedly provided on the ends of the crossbars of the two L-shaped movable rods (5); The inner walls of the two connecting blocks (502) are fixedly connected by the first connecting shaft (13) and the outer wall of the first connecting frame (1001) adjacent to it; The vertical rods of the two L-shaped movable rods (5) are respectively provided with rectangular through slots (501); A second rectangular slider (14) is slidably provided in each of the two rectangular through slots (501), and a second connecting shaft is fixedly provided on the outer wall of each of the two second rectangular sliders (14); The first end of the second connecting rod (6) is rotatably sleeved on the outer wall of each of the two second connecting shafts; A third connecting shaft is fixedly provided on the outer wall of the vertical plate of the two L-shaped support plates (1), and the middle ends of the two second connecting rods (6) are respectively rotatably sleeved on the outer wall of the third connecting shaft that is close to them; Handles (7) are rotatably provided on the outer walls of the second ends of the two second connecting rods (6).

5. The sand sampler for geotechnical engineering testing according to claim 1, characterized in that: Both pedals (4) are provided with rubber pads to increase friction.

6. The sand sampler for geotechnical engineering testing according to claim 1, characterized in that: The bottom of the drill barrel (12) is a cone-shaped structure that facilitates sinking into the soil.

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