Roadbed compaction inspection device

Abstract

The utility model provides a roadbed compaction inspection device, which belongs to the technical field of road construction equipment, and comprises a walking frame, a rolling mechanism and a soil sampling mechanism, by arranging the rolling mechanism, the rolling mechanism can apply counter weight to a roller in the walking process of the walking frame, so that the compaction degree of the surface layer of a road surface can be judged by utilizing the indentation of the roller, and the soil sampling mechanism is used for sampling soil. The number of the balance weight parts or the weight of the whole balance weight can be adjusted according to needs. And moreover, the soil sampling mechanism is used for sampling soil to form the test hole, so that the subjectivity of manual excavation of the test hole is avoided, and the consistency of the size of the test hole is ensured. The soil sampling mechanism can quickly sample soil, so that the compaction degree of the inner layer can be conveniently obtained. In conclusion, the roadbed compaction inspection device can improve the roadbed compaction detection efficiency and the reliability and precision of the detection result.

Description

Technical Field

[0001] This utility model belongs to the technical field of road construction equipment, specifically relating to a roadbed compaction testing device. Background Technology

[0002] The application of subgrade and pavement compaction technology is of great significance for improving the quality of highway construction, and it has a decisive impact on the safety and stability of highways after they are put into use. Therefore, strict management of compaction technology is crucial. Improving subgrade and pavement compaction technology, to a certain extent, has a significant impact on the firmness of the pavement.

[0003] Generally, during highway construction, strict cost control is essential, a key focus for relevant personnel. Consequently, highway pavements are typically not very thick, compromising their strength and stability. Against this backdrop, increasingly stringent requirements for roadbed and pavement compaction techniques are crucial for ensuring road surface quality.

[0004] In addition, the compaction technology of the roadbed and pavement is also closely related to the smoothness of the road surface. Good compaction can effectively correct unevenness in the road surface, thus ensuring sufficient smoothness and accessibility of the highway. Proper compaction ensures a tight bond between road materials, reducing voids. This, to a certain extent, reduces the deformation and cracking of road construction materials due to rainwater impact and soaking, ensuring the overall stability of the road surface. Therefore, the application of roadbed and pavement compaction technology is of great significance in highway engineering construction, and relevant personnel need to comprehensively control this technology.

[0005] Among existing technologies, the sand cone method is a primary method for determining compaction at many engineering sites. While seemingly simple, it is often difficult to master in practice, easily leading to significant errors and frequent disputes between quality inspection and supervision departments and construction units. The principle of the sand cone method is to replace the volume of a test hole with uniformly sized sand particles. The basic principle involves using clean, uniform sand with a particle size of 0.30–0.60 mm or 0.25–0.50 mm, which is dropped freely from a certain height into the test hole. The volume of the test hole is measured based on the principle of constant unit weight (i.e., replacing the aggregate in the test hole with standard sand), and the measured dry density of the sample is calculated based on the moisture content of the aggregate. The operation generally involves chiseling the test hole, filling with sand, comparison, and backfilling. Each step is performed manually, and variations in the size and depth of the test hole can easily lead to measurement errors. Furthermore, the efficiency is not ideal, and it cannot quickly obtain the degree of road compaction. Utility Model Content

[0006] This invention aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, this invention provides a roadbed compaction testing device that can quickly obtain the degree of road surface compaction and ensure the consistency of test hole dimensions, thereby improving efficiency and measurement accuracy.

[0007] The roadbed compaction testing device according to an embodiment of the present invention includes:

[0008] A traveling frame, wherein a traveling mechanism is provided at the bottom of the traveling frame;

[0009] A rolling mechanism is provided on the traveling frame. The rolling mechanism includes a rolling adjustment part, a counterweight part, and rollers. The rolling adjustment part can be adjusted up and down relative to the traveling frame under the action of external force. The rollers are rotatably disposed at the bottom of the rolling adjustment part. The counterweight part is detachably disposed above the rolling adjustment part for pressing down the rolling adjustment part.

[0010] A soil-taking mechanism is mounted on the traveling frame and is used to take soil downwards and form a test hole.

[0011] The roadbed compaction testing device according to the embodiments of this utility model has at least the following beneficial effects:

[0012] The roadbed compaction testing device of this embodiment, by incorporating a rolling mechanism, applies counterweights to the rollers during the movement of the frame. The roller indentations are then used to determine the compaction degree of the road surface layer. The number of counterweights or the overall weight of the counterweight can be adjusted as needed. Furthermore, the use of a soil sampling mechanism to create test holes avoids the subjectivity of manual excavation and helps ensure the consistency of test hole dimensions. The soil sampling mechanism allows for rapid soil sampling, facilitating the acquisition of the compaction degree of the inner layer. In summary, the roadbed compaction testing device of this embodiment can improve the efficiency of roadbed compaction testing and the reliability and accuracy of the test results.

[0013] According to some embodiments of the present invention, the rolling mechanism is further provided with a reset part, which is used to keep the rolling adjustment part at the upper end of the lifting stroke under normal conditions, and when the rolling adjustment part is at the upper end of the lifting stroke, the roller is suspended above the bottom of the walking mechanism.

[0014] According to some embodiments of the present invention, the rolling adjustment part includes a mounting shaft and a support plate. The mounting shaft is vertically mounted on the walking frame, and the support plate is horizontally mounted on the upper end of the mounting shaft. The rolling mechanism has guide parts fixedly mounted on both sides of the mounting shaft. The upper end of the guide part passes through the support plate, and the reset part is sleeved on the guide part.

[0015] According to some embodiments of the present invention, the counterweight part is provided with a recess or hole through which the guide part passes.

[0016] According to some embodiments of the present invention, the rolling mechanism is provided with a plurality of counterweights, and the upper and lower surfaces of the counterweights are provided with matching concave and convex structures to achieve stacking.

[0017] According to some embodiments of the present invention, the walking mechanism is provided with a positioning part that can be adjusted up and down. The walking mechanism has a walking state and a stopped state. When the walking mechanism is in the stopped state, the positioning part touches the ground downwards.

[0018] According to some embodiments of this utility model, a positioning frame is provided on the walking frame. The positioning frame can be adjusted horizontally along a first direction. A downward pressing slope is provided on the side wall of the positioning part. The positioning frame can abut against the downward pressing slope, thereby applying a downward pressing force to the positioning part.

[0019] According to some embodiments of the present invention, an elastic element is provided between the positioning frame and the walking frame. The elastic element is used to keep the positioning part abutting against the positioning part under normal conditions. The walking mechanism also includes a connecting frame, which connects all the positioning parts.

[0020] According to some embodiments of the present invention, the soil sampling mechanism is provided with a spiral soil sampler, the spiral soil sampler is provided with spiral blades, and at least a portion of the shaft segment of the spiral blades is provided with circumferential cutting edges. During the rotation of the spiral soil sampler, the circumferential cutting edges can cut soil blocks in the vertical direction.

[0021] According to some embodiments of this utility model, the soil sampling mechanism is further provided with a limiting rod, which is arranged around the spiral blade and can be adjusted up and down relative to the spiral blade.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of a spiral soil sampler.

[0026] Figure 3This is a schematic diagram of a positioning part.

[0027] Figure 4 This is a schematic diagram of a roller structure;

[0028] Figure 5 This is a schematic diagram of a counterweight component. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Reference Figures 1 to 5An embodiment of this utility model proposes a roadbed compaction testing device, comprising:

[0035] The traveling frame 100 has a traveling mechanism 101 at its bottom;

[0036] A rolling mechanism 400 is mounted on the traveling frame 100. The rolling mechanism 400 includes a rolling adjustment part 402, a counterweight part 403, and a roller 401. The rolling adjustment part 402 can be adjusted up and down relative to the traveling frame 100 under the action of external force. The roller 401 is rotatably mounted at the bottom of the rolling adjustment part 402. The counterweight part 403 is detachably mounted above the rolling adjustment part 402 and is used to press down the rolling adjustment part 402.

[0037] The soil-taking mechanism 200 is mounted on the traveling frame 100 and is used to take soil downwards and form a test hole.

[0038] During operation, the walking frame 100 is supported on the road surface by the walking mechanism 101. During the walking process, the roller 401 presses down on the road surface under the pressure of the counterweight 403 to form an indentation. When it reaches the set position, it stops, and then the soil removal mechanism 200 removes soil downwards to form a test hole.

[0039] The roadbed compaction testing device of this embodiment, by setting up a rolling mechanism 400, can apply counterweight to the rollers 401 during the movement of the traveling frame 100, thereby using the indentation of the rollers 401 to determine the compaction degree of the road surface layer. The number of counterweights 403 or the overall weight of the counterweight can be adjusted as needed. Furthermore, the soil sampling mechanism 200 is used to collect soil to form test holes, avoiding the subjectivity of manual excavation and helping to ensure the consistency of test hole dimensions. The soil sampling mechanism 200 quickly collects soil, facilitating the acquisition of the compaction degree of the inner layer.

[0040] In summary, the roadbed compaction testing device of this embodiment can improve the efficiency of roadbed compaction testing and the reliability and accuracy of the test results.

[0041] The walking mechanism 101 in this embodiment can be either a non-powered structure that moves by manual pushing or an active structure that uses a motor to drive movement. Those skilled in the art can flexibly configure it as needed.

[0042] Combination Figure 4 In some embodiments of this utility model, the rolling mechanism 400 is further provided with a reset part, which is used to keep the rolling adjustment part 402 at the upper end of the lifting stroke under normal conditions. When the rolling adjustment part 402 is at the upper end of the lifting stroke, the roller 401 is suspended above the bottom of the walking mechanism 101.

[0043] When the rolling adjustment unit 402 is at the upper end of the adjustment stroke, the roller 401 is higher than the traveling mechanism 101 and does not contact the road surface, which can improve the convenience of device transfer. At the same time, it can reduce the wear on the roller 401. The roller 401 only rolls the road surface when making indentation reference judgment, which helps to improve the reliability of the judgment result.

[0044] In some embodiments of this utility model, the rolling adjustment part 402 includes a mounting shaft and a support plate. The mounting shaft is vertically mounted on the traveling frame 100. A linear bearing or other structure can be used between the mounting shaft and the traveling frame 100 to improve the smoothness of the lifting adjustment.

[0045] Considering that this device is used for roadbed compaction testing, and the working environment is prone to dust, in order to improve the smoothness of the lifting and lowering adjustment of the mounting shaft, telescopic sleeves can be further installed at the upper and lower ends of the mounting shaft located on the traveling frame 100, so as to prevent dust from entering the area where the mounting shaft passes through the traveling frame 100, that is, to prevent dust from entering structures such as linear bearings or bushings.

[0046] The support plate is horizontally positioned at the upper end of the mounting shaft to support the counterweight 403.

[0047] When the counterweight 403 is placed on the support plate, it will press down the mounting shaft, causing the roller 401 installed at the bottom of the mounting shaft to come into contact with the road surface and form an indentation under the pressure of the counterweight 403, providing a reference for the workers.

[0048] The rolling mechanism 400 has guide portions 404 fixedly provided on both sides of the mounting shaft, meaning the guide portions 404 are relatively fixed to the traveling frame 100. The upper end of the guide portion 404 passes through the support plate, and the reset portion is sleeved on the guide portion 404. In this embodiment, by providing the guide portion 404, the stability of the reset portion can be improved, and the stability of the support plate can also be improved.

[0049] Since the upper end of the guide part 404 passes through the support plate, the guide part 404 will form a protrusion structure at the upper end of the support plate. As the support plate is pressed down by the counterweight part 403, the protrusion height of the guide part 404 relative to the upper end of the support plate will increase. This protrusion can be used to limit the counterweight part 403, improve the placement stability of the counterweight part 403, and prevent the counterweight part 403 from falling off due to vibration or bumps caused by the movement of the walking frame 100.

[0050] Combination Figure 5In some embodiments of this utility model, the counterweight 403 is provided with a recess or hole through which the guide 404 passes. Since there are two guides 404, located on both sides of the mounting shaft, when the counterweight 403 is placed on the support plate, the position can be limited by the recess or hole cooperating with the guide 404, ensuring the stability of the placement. At the same time, it helps to keep the center of gravity of the counterweight 403 coincident with the mounting shaft, improving the structural stability of the rolling mechanism 400.

[0051] In this embodiment, the guide part 404 can be a rod-shaped structure, such as a guide rod.

[0052] In some embodiments of this utility model, the rolling mechanism 400 is provided with a plurality of counterweights 403, and the upper and lower surfaces of the counterweights 403 are provided with matching concave and convex structures to achieve stacking.

[0053] In practical applications, staff can place the required number of counterweights 403 as needed. The concave-convex structure between the counterweights 403 and the limiting function of the guides 404 on both sides can effectively ensure the stacking stability of the counterweights 403.

[0054] Specifically, the upper center of the counterweight 403 is provided with a spherical convex hull, and the lower center is provided with a cavity that matches the convex hull. When the counterweights 403 are stacked, the lower counterweight 403 is relatively positioned between two adjacent counterweights 403 by the convex hull embedding into the cavity of the upper counterweight 403, which can achieve both automatic centering and horizontal positioning.

[0055] In some embodiments of this utility model, the walking mechanism 101 is provided with a positioning part 300 that can be adjusted up and down. The walking mechanism 101 has a walking state and a stopped state. When the walking mechanism 101 is in the stopped state, the positioning part 300 touches the ground downwards.

[0056] It is understandable that in actual work, the road surface to be tested may have a slope, and movement needs to be avoided when the test hole excavation is stopped. In this embodiment, by setting a positioning part 300, during the process of pushing the walking frame 100 to move, the positioning part 300 is moved to the upper end of the adjustment stroke, so that it does not contact the ground, and the walking frame 100 can move normally. When excavating the test hole, the positioning part 300 is adjusted to touch the ground downwards, so that the walking frame 100 cannot move freely.

[0057] Furthermore, the positioning part 300 is preferably configured as a pointed cone structure, using the pointed cone at the bottom to penetrate the ground for positioning.

[0058] In some embodiments of this utility model, a positioning frame 303 is provided on the walking frame 100. The positioning frame 303 can be adjusted horizontally along the first direction. A downward pressing slope 3001 is provided on the side wall of the positioning part 300. The positioning frame 303 can abut against the downward pressing slope 3001, thereby applying a downward pressing force to the positioning part 300.

[0059] With the structural configuration of this embodiment, the positioning part 300 can be pressed by the positioning frame 303 to keep it in contact with the ground, thereby ensuring that the position of the traveling frame 100 is stable when it is stopped.

[0060] The downward pressing slope 3001 is an inclined side wall on the positioning part 300. The width of the lower end of the side wall is increased, so that the positioning part 300 cannot move upward under the abutment of the positioning frame 303.

[0061] Meanwhile, since the positioning frame 303 can abut against the positioning part 300, after the positioning part 300 moves upward, the positioning frame 303 can be used to restrict the positioning part 300 and prevent the positioning part 300 from moving downward, thus ensuring the stability of the walking state.

[0062] In some embodiments of this utility model, an elastic element is provided between the positioning frame 303 and the traveling frame 100. The elastic element is used to keep the positioning part 300 abutting against the positioning part 300 in the normal state. In this way, the positioning frame 303 can automatically press the positioning part 300. When the positioning part 300 is restricted by the positioning frame 303 to the upper end of the adjustment stroke, the traveling frame 100 can be kept in a traveling state. When the positioning frame 303 presses against the downward pressure slope 3001, the traveling frame 100 can be kept in a stopped state.

[0063] The traveling mechanism 101 also includes a connecting frame 301, which connects all the positioning parts 300. All the positioning parts 300 can be adjusted by adjusting the connecting frame 301.

[0064] Combination Figure 1 , Figure 3 Specifically, one end of the walking frame 100 is provided with a handrail structure 102, and the connecting frame 301 is provided with a lever 302 extending to the handrail structure 102. By pulling up the lever 302, all the positioning parts 300 can be moved upward; by pressing down the lever 302, all the positioning parts 300 can be moved downward. The positioning frame 303 is slidably mounted on the walking frame 100 and is held against the positioning parts 300 by the action of an elastic element. A foot pedal is provided on the side of the positioning frame 303 near the handrail structure 102.

[0065] In the initial state, the positioning part 300 is at the upper end of the vertical adjustment stroke, and the step formed at the lower end of the downward pressure slope 3001 is stuck on the positioning frame 303, so that the positioning part 300 is restricted by the positioning frame 303 to the upper end of the stroke and cannot move downward, and the walking frame 100 is in the walking state and can walk normally.

[0066] When the machine needs to stop at the designated location or when a test excavation is required, the worker can press the foot pedal forward to control the positioning frame 303 to move forward until it separates from the positioning part 300. Under the action of gravity and the worker's manual pressing of the lever 302, the positioning part 300 can move downward to touch the ground. During this process, the foot only needs to press the foot pedal once, without continuous pressing. Afterward, the positioning frame 303 abuts against the downward pressure slope 3001 under the action of the elastic element, restricting the upward movement of the positioning part 300 and applying downward pressure to the positioning part 300, so that the traveling frame 100 is stable in a stopped state and will not move freely.

[0067] When you need to walk again, step on the foot pedal to release the positioning frame 303 from pressing the positioning part 300. Then, use your hand to push the lever 302 upwards so that the positioning part 300 moves upwards until it is re-engaged on the step of the downward slope 3001 and re-engaged on the upper end of the positioning frame 303.

[0068] Since the walking frame 100 is also equipped with a counterweight 403, the stability of the walking frame 100 can be effectively ensured when it is stepped on, and the walking frame 100 is not easy to shift.

[0069] Combination Figure 2 In some embodiments of this utility model, the soil sampling mechanism 200 is provided with a spiral soil sampler 201, the spiral soil sampler 201 is provided with spiral blades 2011, and at least a portion of the shaft segment of the spiral blades 2011 is provided with circumferential cutting edges 2012. During the rotation of the spiral soil sampler 201, the circumferential cutting edges 2012 can cut the soil clods in the vertical direction.

[0070] Understandably, the spiral blades in the existing technology are all radial spirals. Therefore, although they can be spiraled into the roadbed, when they move upward to remove the soil layer, the soil clods adhere and collapse with the soil layer around the test hole, causing a large deviation in the size of the test hole and affecting the amount of sand to be filled.

[0071] In this embodiment, by setting a circumferential cutting edge 2012, the circumferential cutting edge 2012 can cut the soil layer to be extracted from the outer soil layer during the screwing process. In this way, when the spiral soil extractor 201 moves upward to extract soil, it can alleviate or even completely solve the above-mentioned problems, which is conducive to maintaining the consistency of the test hole size each time, thereby improving the accuracy of the test results.

[0072] It is understandable that the circumferential cutting edge 2012 does not necessarily have to completely cut off the soil layer from the surrounding soil layer; partial cutting can also achieve the above effect.

[0073] Combination Figure 2 Furthermore, the spiral soil sampler 201 is divided into a first part and a second part from top to bottom along its own axis, and the circumferential blade 2012 is only set on the outer periphery of the spiral blade 2011 corresponding to the first part.

[0074] With the structural configuration of this embodiment, the circumferential cutting edge 2012 is set in the first part, which makes it convenient for the spiral soil sampler 201 to be screwed into the roadbed. At the same time, by separating the upper end of the soil block in the screwed-in area from the surrounding soil layer, the resistance when the spiral soil sampler 201 is pulled upward can be reduced, and the regularity and dimensional consistency of the test hole can be maintained.

[0075] The circumferential cutting edge 2012 is formed by a triangular blade protruding upward from the spiral blade 2011.

[0076] It is understandable that the auger 201 is also equipped with a drive mechanism to drive the auger 201 downward into the roadbed and to control the auger 201 to extract the soil layer upward. Its structure can adopt the structure in the existing technology, and no specific limitation is made here.

[0077] Combination Figure 1 In some embodiments of this utility model, the soil sampling mechanism 200 is also provided with a limiting rod 202, which is arranged around the spiral blade 2011 and can be adjusted up and down relative to the spiral blade 2011.

[0078] At least two limiting rods 202 are provided. When in use, they are first driven into the roadbed. As the auger 201 is screwed in, the limiting rods 202 can be used to fix the soil layers around the perimeter when extracting the soil layers. This is beneficial for the rapid extraction of the soil layers and for maintaining the regularity of the test hole shape.

[0079] Similarly, the limit rod 202 is also equipped with a drive structure for driving its independent lifting and lowering. The drive structure can be set with reference to existing technology, and no specific limitation is made here.

[0080] During operation, this device can be used to quickly excavate multiple test holes on the roadbed to obtain samples of the inner layer of the roadbed, determine the degree of compaction, and improve testing efficiency.

[0081] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A roadbed compaction testing device, characterized in that, include: A traveling frame, wherein a traveling mechanism is provided at the bottom of the traveling frame; A rolling mechanism is provided on the traveling frame. The rolling mechanism includes a rolling adjustment part, a counterweight part, and rollers. The rolling adjustment part can be adjusted up and down relative to the traveling frame under the action of external force. The rollers are rotatably disposed at the bottom of the rolling adjustment part. The counterweight part is detachably disposed above the rolling adjustment part for pressing down the rolling adjustment part. A soil-taking mechanism is mounted on the traveling frame and is used to take soil downwards and form a test hole.

2. The roadbed compaction testing device according to claim 1, characterized in that, The rolling mechanism is also provided with a reset part, which is used to keep the rolling adjustment part at the upper end of the lifting stroke under normal conditions. When the rolling adjustment part is at the upper end of the lifting stroke, the roller is suspended above the bottom of the walking mechanism.

3. The roadbed compaction testing device according to claim 2, characterized in that, The rolling adjustment part includes a mounting shaft and a support plate. The mounting shaft is vertically mounted on the traveling frame, and the support plate is horizontally mounted on the upper end of the mounting shaft. The rolling mechanism has guide parts fixedly mounted on both sides of the mounting shaft. The upper end of the guide part passes through the support plate, and the reset part is sleeved on the guide part.

4. The roadbed compaction testing device according to claim 3, characterized in that, The counterweight is provided with a recess or hole through which the guide part passes.

5. The roadbed compaction testing device according to claim 1, characterized in that, The rolling mechanism is provided with multiple counterweights, and the upper and lower surfaces of the counterweights are provided with matching concave and convex structures to achieve stacking.

6. The roadbed compaction testing device according to claim 1, characterized in that, The walking mechanism is equipped with a positioning part that can be adjusted up and down. The walking mechanism has a walking state and a stopped state. When the walking mechanism is in the stopped state, the positioning part touches the ground downwards.

7. The roadbed compaction testing device according to claim 6, characterized in that, The walking frame is equipped with a positioning frame, which can be adjusted horizontally along a first direction. The side wall of the positioning part is provided with a downward pressing slope, and the positioning frame can abut against the downward pressing slope to apply a downward pressing force to the positioning part.

8. The roadbed compaction testing device according to claim 7, characterized in that, An elastic element is provided between the positioning frame and the traveling frame. The elastic element is used to keep the positioning part abutting against the positioning part in the normal state. The traveling mechanism also includes a connecting frame, which connects all the positioning parts.

9. The roadbed compaction testing device according to claim 1, characterized in that, The soil sampling mechanism is equipped with a spiral soil sampler, which has spiral blades. At least a portion of the shaft section of the spiral blades is equipped with circumferential cutting edges. During the rotation of the spiral soil sampler, the circumferential cutting edges can cut soil blocks in the vertical direction.

10. The roadbed compaction testing device according to claim 9, characterized in that, The soil sampling mechanism is also equipped with a limiting rod, which is arranged around the spiral blade and can be adjusted up and down relative to the spiral blade.

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