A highway engineering supervision soil sampling device

Abstract

The application relates to the technical field of soil sampling, in particular to a highway engineering supervision soil sampling device, which comprises a supporting frame, a guide frame, a movable plate, a connecting seat, a collection tank and a sand screen net, the top middle portion of the supporting frame is fixedly connected with the outer wall surface of the guide frame, the movable plate is sleeved in the inside of the guide frame, the top of the connecting seat is screw-connected with the bottom surface of the movable plate, and the bottom of the collection tank is clamped with the outside of the sand screen net. The highway engineering supervision soil sampling device has the adhesion characteristics of the sand screen net and the wet soil sample, can automatically form a seal in the lifting instant, the sharp cone column is designed to be firstly inserted into and fixed to the lower soil body, an upward shearing force instead of a pulling force is provided when the collection tank is separated from the lower soil body, undisputable original data for compaction degree calculation is provided, a driving system composed of a stepping motor and a threaded rod provides stable, controllable and powerful downward pressure and lifting force, and replaces the traditional low-efficiency manpower hammering.

Description

Technical Field

[0001] This application relates to the field of soil sampling technology, and in particular to a soil sampling device for highway engineering supervision. Background Technology

[0002] Highway engineering refers to the surveying, measurement, design, construction, maintenance, and management of highway structures. Highway engineering structures include: roadbed, pavement, bridges, culverts, tunnels, drainage systems, safety protection facilities, greening and traffic monitoring facilities, as well as buildings, workshops, and other service facilities used for construction, maintenance, and monitoring.

[0003] A search revealed that CN220927787U discloses a soil sampling device for on-site supervision in highway engineering. The device is moved to its designated position, and a positioning block is brought into contact with the ground to fix it. Before fixing, the handle is used to pull the lever, moving the movable block. The connecting block at the top of the sampling cylinder is then inserted into the fixed base. Releasing the handle allows the spring force to engage the locking rod with the connecting block, securing the sampling cylinder. The drive motor is then activated, rotating the lead screw. This rotation causes the movable plate to descend, allowing the fixed base to insert the sampling cylinder into the soil for sampling. The amount of soil to be sampled is determined by the scale lines on the handle. After sampling, pulling the handle separates the locking rod from the connecting block, allowing the sampling cylinder to be removed.

[0004] Regarding the aforementioned technologies, the inventors believe the following technical defects require improvement: Soil samples from highway engineering testing are often near their optimum moisture content or are relatively moist due to groundwater levels. These soils exhibit high adhesion and fluidity. When the sampling tube is lifted, the soil sample inside separates from the surrounding soil layer, and the bottom of the sample loses external support. During the lifting process, the soil sample is entirely subject to gravity. Simultaneously, the lifting action inevitably generates swaying and vibration, further disrupting the delicate adhesive friction balance between the soil sample and the tube wall, exacerbating soil flow. This loss leads to a lower-than-expected moisture content and altered particle size distribution in the final laboratory measurement. Since moisture content and particle size distribution are key parameters for calculating compaction, this could potentially cause misjudgments of the compacted soil quality. Utility Model Content

[0005] This application provides a soil sampling device for highway engineering supervision to address the following technical problems: During the lifting process, the soil sample is entirely governed by gravity. Simultaneously, the lifting action inevitably generates swaying and vibration, which further disrupts the weak adhesive friction balance between the soil sample and the cylinder wall, intensifying soil flow. This loss can lead to an underestimation of the final laboratory-measured moisture content and altered particle size distribution. Since moisture content and particle size distribution are key parameters for calculating compaction, this can potentially cause misjudgments of the compacted material quality.

[0006] This application provides a soil sampling device for highway engineering supervision, which adopts the following technical solution:

[0007] A soil sampling device for highway engineering supervision includes a support frame, a guide frame, a movable plate, a connecting seat, a collection tank, and a sand sieve. The top center of the support frame is fixedly connected to the outer wall of the guide frame. The movable plate is sleeved inside the guide frame. The top of the connecting seat is threadedly connected to the bottom surface of the movable plate. The bottom of the collection tank is engaged with the outer side of the sand sieve.

[0008] The support frame and the guide frame constitute the basic support and precise guidance of the entire device, reducing the damage to the soil sample structure and the aggravation of soil flow caused by device shaking and vibration. The movable plate and the connecting seat ensure that the collection container can be pressed in and lifted straight, avoiding the additional shearing and disturbance between the cylinder wall and the soil sample caused by tilting and lifting in traditional methods, thereby reducing the tendency of the soil sample to fall off from the bottom. The collection container is used to cut into the soil layer and contain the collected soil sample. The mesh structure of the sand sieve allows air and some moisture in the soil to be discharged, reducing rebound and pressing resistance, and facilitating the smooth entry of the collection container into the soil layer.

[0009] In one feasible technical solution of this application, a stepper motor and a threaded rod are further provided inside the guide frame. The stepper motor is threadedly connected to the top inner side of the guide frame, and the top of the threaded rod is fixedly connected to the motor shaft of the stepper motor through a coupling.

[0010] In one feasible technical solution of this application, the bottom of the collection tank is further arranged in a ring with pointed conical columns.

[0011] In one feasible technical solution of this application, the connection between the connecting seat and the movable plate is further provided with mutually compatible screw rods and screw holes.

[0012] In one feasible technical solution of this application, the bottom of the connecting seat is further provided with a drive motor, a limiting frame and an arc-shaped clamping plate. The motor shaft of the drive motor is fixedly connected to the top center of the limiting frame through a coupling, and the surface of the arc-shaped clamping plate is fixedly connected to the bottom inner side of the limiting frame.

[0013] In one feasible technical solution of this application, the top of the collection tank is provided with a feed inlet with a diameter slightly smaller than that of the arc-shaped card plate.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] This device utilizes the adhesion properties of the sand sieve to the moist soil sample to automatically form a seal upon lifting. Simultaneously, the pointed cone design penetrates and secures the underlying soil layer beforehand, providing an upward shear force rather than a tensile force when the collection container separates from the lower soil mass. This significantly reduces disturbance and vacuum suction on the soil sample at the bottom of the container. This ensures that key parameters such as moisture content and particle size distribution measured in the laboratory accurately reflect the actual soil conditions on-site, providing indisputable raw data for compaction calculations. The drive system, consisting of a stepper motor and a threaded rod, provides smooth, controllable, and powerful downward and lifting force, replacing the traditional, inefficient manual hammering. The guide frame ensures straight-line movement, preventing jamming and eliminating the need for repeated sampling due to insufficient sample volume. It also eliminates the tedious and ineffective steps of temporarily sealing the bottom of the container. The pointed cone effectively breaks up the harder surface soil crust or gravel, paving the way for the smooth penetration of the collection container. The quick-connect and release mechanism, consisting of a drive motor, a limit frame, and an arc-shaped locking plate, can securely lock or release the collection tank by rotation. The connection is reliable and the torque transmission efficiency is high, preventing slippage or detachment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the soil sampling device for highway engineering supervision according to an embodiment of this application.

[0018] Figure 2 This is a cross-sectional view of the guide frame in an embodiment of this application.

[0019] Figure 3 This is a disassembled diagram of the active plate in an embodiment of this application.

[0020] Figure 4 This is a disassembled diagram of the movable plate and the connecting seat in the embodiments of this application.

[0021] Figure 5 This is a cross-sectional view of the connector in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 11. Support frame; 12. Guide frame; 13. Movable plate; 14. Connecting seat; 15. Collection tank; 16. Sand screen; 2. Stepper motor; 3. Threaded rod; 4. Conical column; 5. Screw rod; 6. Screw hole; 7. Drive motor; 8. Limiting frame; 9. Arc-shaped clamping plate; 10. Feed port. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "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 application 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 application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0029] This application discloses a soil sampling device for highway engineering supervision. (Refer to...) Figures 1 to 5 The soil sampling device for highway engineering supervision includes a support frame 11, a guide frame 12, a movable plate 13, a connecting seat 14, a collection tank 15, and a sand screen 16. The top center of the support frame 11 is fixedly connected to the outer wall of the guide frame 12. The movable plate 13 is sleeved inside the guide frame 12. The top of the connecting seat 14 is threadedly connected to the bottom of the movable plate 13. The bottom of the collection tank 15 is engaged with the outer side of the sand screen 16.

[0030] The support frame 11 and guide frame 12 constitute the basic support and precise guidance of the entire device, reducing the damage to the soil sample structure and the aggravation of soil flow caused by device shaking and vibration. The movable plate 13 and the connecting seat 14 ensure that the collection tank 15 can be pressed in and lifted straight, avoiding the additional shearing and disturbance between the cylinder wall and the soil sample caused by tilting and lifting in the traditional method, thereby reducing the tendency of the soil sample to fall off from the bottom. The collection tank 15 is used to cut into the soil layer and contain the collected soil sample. The mesh structure of the sand screen 16 allows air and some moisture in the soil to be discharged, reducing rebound and pressing resistance, and facilitating the smooth entry of the collection tank 15 into the soil layer.

[0031] The guide frame 12 is also equipped with a stepper motor 2 and a threaded rod 3. The stepper motor 2 is threadedly connected to the top inner side of the guide frame 12, and the top of the threaded rod 3 is fixedly connected to the motor shaft of the stepper motor 2 through a coupling.

[0032] The bottom of the collection tank 15 is also arranged in a ring with pointed conical columns 4.

[0033] The connection between the connecting seat 14 and the movable plate 13 is also provided with a matching screw rod 5 and screw hole 6.

[0034] The bottom of the connecting seat 14 is also provided with a drive motor 7, a limit frame 8 and an arc-shaped clamping plate 9. The motor shaft of the drive motor 7 is fixedly connected to the top center of the limit frame 8 through a coupling, and the surface of the arc-shaped clamping plate 9 is fixedly connected to the bottom inner side of the limit frame 8.

[0035] The top of the collection tank 15 has a feed inlet 10 with a diameter slightly smaller than that of the arc-shaped card plate 9.

[0036] The general process of using the soil sampling device for highway engineering supervision in this embodiment is as follows:

[0037] Place the support frame 11 stably on the preset sampling point, ensuring its overall level and stability. Tighten and fix the two at the connection point of the connecting seat 14 and the movable plate 13 using the screw rod 5 and screw hole 6, completing the assembly of the power transmission component. Attach the sand screen 16 to the bottom of the collection tank 15. Start the drive motor 7 at the bottom of the connecting seat 14 to drive the limit frame 8 to rotate, adjusting the opening between the two arc-shaped clamping plates 9 to its maximum. Insert the assembled collection component upwards through the collection tank 15 and the sand screen 16 from its top inlet 10, allowing the arc-shaped clamping plates 9 to firmly clamp the outer edge of the top of the collection tank 15 using their elastic tension, achieving a quick and reliable connection. During sampling, start the stepper motor 2 at the top of the guide frame 12. Stepper motor 2 drives threaded rod 3 to rotate, thereby pushing movable plate 13 to move smoothly downward along the inner side of guide frame 12. Multiple pointed cones 4 at the bottom of collection tank 15 first penetrate the soil, breaking up the surface compacted soil and providing initial positioning. Subsequently, the cutting edge of collection tank 15 begins to cut and penetrate the soil layer. During this process, air and some moisture in the soil can be discharged through the mesh of sand screen 16 at the bottom, significantly reducing the pressure resistance and soil rebound, making the penetration process smoother. After collection tank 15 penetrates to the predetermined depth, stepper motor 2 is turned off. Stepper motor 2 is restarted to reverse its direction, and the entire movable plate 13 assembly is lifted uniformly and vertically by threaded rod 3. At the moment of lifting, collection tank 15 separates from the lower soil layer. At this time, the key role of sand screen 16 becomes apparent: under the adhesion of the moist soil sample inside the tank and the action of gravity, soil particles quickly block the mesh, forming an effective sealing layer at the bottom of the tank, automatically preventing the soil sample from leaking from the bottom due to gravity during the lifting process. The constraints of the guide frame 12 ensured that the lifting process was extremely stable, completely avoiding the shear disturbance caused by shaking and tilting in traditional methods, and protecting the original structure of the soil sample.

[0038] The beneficial technical effects of the soil sampling device for highway engineering supervision in this application are roughly as follows:

[0039] This device utilizes the adhesion properties of the sand sieve 16 to the moist soil sample to automatically form a seal upon lifting. Simultaneously, the design of the pointed cone 4 pre-pierces and fixes the lower soil layer, providing an upward shear force rather than a tensile force when the collection container 15 separates from the lower soil, greatly reducing disturbance and vacuum suction on the soil sample at the bottom of the container. This ensures that key parameters such as moisture content and particle size distribution measured in the laboratory accurately reflect the actual condition of the soil on site, providing indisputable raw data for compaction calculations. The drive system, consisting of the stepper motor 2 and the threaded rod 3, provides stable, controllable, and powerful downward pressure and lifting force, replacing the traditional inefficient manual hammering. The guide frame 12 ensures straight-line movement, avoiding jamming. Operators no longer need to repeat sampling due to insufficient sample volume, and it eliminates the tedious and ineffective steps of temporarily sealing the bottom of the container. The pointed cone 4 effectively breaks up the harder surface soil crust or gravel, paving the way for the smooth penetration of the collection container 15. The quick-connection and release mechanism, consisting of the drive motor 7, the limit frame 8, and the arc-shaped clamping plate 9, can securely lock or release the collection tank 15 by rotation. The connection is reliable and the torque transmission efficiency is high, avoiding slippage or detachment.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A soil sampling device for highway engineering supervision, characterized in that, The system includes a support frame (11), a guide frame (12), a movable plate (13), a connecting seat (14), a collection tank (15), and a sand screen (16). The top center of the support frame (11) is fixedly connected to the outer wall of the guide frame (12). The movable plate (13) is sleeved inside the guide frame (12). The top of the connecting seat (14) is threadedly connected to the bottom surface of the movable plate (13). The bottom of the collection tank (15) is engaged with the outer side of the sand screen (16). The support frame (11) and the guide frame (12) constitute the basic support and precise guidance of the entire device, reducing the damage to the soil sample structure and the aggravation of soil flow caused by device shaking and vibration. The movable plate (13) and the connecting seat (14) ensure that the collection tank (15) can be pressed in and lifted straight, avoiding the additional shearing and disturbance between the cylinder wall and the soil sample caused by tilting and lifting in the traditional method, thereby reducing the tendency of the soil sample to fall off from the bottom. The collection tank (15) is used to cut into the soil layer and contain the collected soil sample. The mesh structure of the sand screen (16) allows air and some moisture in the soil to be discharged, reducing rebound and pressing resistance, and facilitating the smooth entry of the collection tank (15) into the soil layer.

2. The soil sampling device for highway engineering supervision according to claim 1, characterized in that, The guide frame (12) is also equipped with a stepper motor (2) and a threaded rod (3). The stepper motor (2) is threadedly connected to the top inner side of the guide frame (12), and the top of the threaded rod (3) is fixedly connected to the motor shaft of the stepper motor (2) through a coupling.

3. The soil sampling device for highway engineering supervision according to claim 1, characterized in that, The bottom of the collection tank (15) is also arranged in a ring with pointed conical columns (4).

4. The soil sampling device for highway engineering supervision according to claim 1, characterized in that, The connection between the connecting seat (14) and the movable plate (13) is also provided with mutually compatible screw rods (5) and screw holes (6).

5. The soil sampling device for highway engineering supervision according to claim 4, characterized in that, The bottom of the connecting seat (14) is also provided with a drive motor (7), a limiting frame (8) and an arc-shaped clamping plate (9). The motor shaft of the drive motor (7) is fixedly connected to the top center of the limiting frame (8) through a coupling. The surface of the arc-shaped clamping plate (9) is fixedly connected to the bottom inner side of the limiting frame (8).

6. The soil sampling device for highway engineering supervision according to claim 5, characterized in that, The top of the collection tank (15) has an inlet (10) with a diameter slightly smaller than that of the arc-shaped card plate (9).

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