A highway roadbed detection sampling device

Abstract

The present invention discloses a highway roadbed detection sampling device, which relates to the field of roadbed detection technology, including a support mechanism, the support mechanism including a support frame, a pulley drive group provided with an outer drill barrel for core drilling, and a longitudinal isolation mechanism provided on the outer drill barrel, and a transverse isolation mechanism provided on the longitudinal isolation mechanism and the slide. The present invention minimizes disturbance to the sample soil by cooperating with the outer drill barrel, the inner barrel and the covering assembly, and at the same time separates the inner barrel and the sample soil through the protective film to reduce the contamination of the sample soil; the sample soils at different depths are quickly separated and processed before being taken out, the operation is efficient and can prevent the differences in the compaction degree and bearing capacity characteristics of the sample soils at different depths from being masked when they are taken out, resulting in difficulty in accurately identifying the specific characteristics of each layer; the protective film, the covering plate and the fan-shaped isolation plate are coordinated to enhance the wrapping strength of the protective film, ensure the integrity of the sample soil structure, and maintain the original state of the sample soil.

Description

Technical Field

[0001] The present invention relates to the technical field of roadbed detection, in particular to a highway roadbed detection sampling device. Background Art

[0002] The roadbed is a crucial component of road construction. Its primary function is to provide a stable, robust platform capable of withstanding various loads and stresses from vehicles and the natural environment. From bottom to top, the roadbed consists of the soil base, subbase, and base layer. Each subbase layer performs distinct functions within the roadbed. To ensure construction quality, regular sampling and testing are performed during the construction process. By sampling and analyzing the subbase layer at different depths, potential problems can be prevented and necessary remedial measures implemented promptly.

[0003] Existing sampling methods for highway subgrade inspection usually include: direct deepening method and segmented coring method. The direct deepening method means that the drill tool is not pulled out, and it continues to drill down to the next predetermined depth. After the sampling is completed, the soil samples within different depth ranges are taken out together and then the soil samples are separated; the segmented coring method means that the drill tool is completely lifted up each time the predetermined depth is reached, and it is cleaned and then drilled again to obtain the next layer of soil samples. When targeting high-risk areas, where highways pass through areas with complex or changeable geological conditions (such as soft soil foundations, mountainous areas, wetlands, etc.), more rigorous sampling is required to evaluate the stability and bearing capacity of the roadbed; when using the segmented coring method for sampling, multiple samplings are required, which is not efficient; when using the direct deepening method for sampling, the efficiency is high, but when drilling from a shallower layer down to a deeper layer, the upper soil or debris may remain on the drill tool or the borehole wall, and enter the deeper sample soil during the drilling process. The roadbed at different depths will be contaminated, and when the sample soil at different depths is taken out in an unprotected state, it is easy to be affected by external forces, resulting in the differences in compaction and bearing capacity characteristics being masked, making it difficult to accurately identify the specific characteristics of each layer, and the distribution status of the structure of each layer is not accurate enough.

[0004] Therefore, in order to reduce soil sample contamination and ensure the accurate distribution of each layer structure, the present invention provides a highway roadbed detection sampling device. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and to propose a highway roadbed detection sampling device.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a highway roadbed detection and sampling device, including a support mechanism, the support mechanism including a support frame, and two hydraulic rods symmetrically installed on the support frame, the telescopic end of the hydraulic rod is equipped with a pulley drive group, and the telescopic end of the hydraulic rod is slidably connected to a slide arranged above the pulley drive group; the pulley drive group is provided with an outer drill barrel for core drilling, and the outer drill barrel is provided with a longitudinal isolation mechanism, and the longitudinal isolation mechanism and the slide are jointly provided with a transverse isolation mechanism.

[0007] The longitudinal isolation mechanism includes an internal sampling component arranged on the outer drill barrel for separating the outer drill barrel and the drilled soil sample, and the internal sampling component is provided with a covering component for longitudinally covering the outer wall of the soil sample. The longitudinal covering prevents the soil samples of different depths from being contaminated during the sampling process.

[0008] The transverse isolation mechanism includes an isolation component and a separation component arranged on a slide to provide support for the isolation component, and the isolation component is used to transversely isolate the sample soil after longitudinal coating. The transverse isolation facilitates the separation and sampling of sample soils of different depths. The isolation component includes a covering plate for circumferentially covering the sample soil and the protective film and a fan-shaped isolation plate for dividing and isolating the sample soils of different depths. The separation component is provided with a driving component for driving the operation of the isolation component.

[0009] In the above-mentioned highway roadbed detection and sampling device, the pulley drive group consists of a fixed frame fixedly connected to the telescopic end of the hydraulic rod and a pulley group assembled on the fixed frame. The pulley group drives the outer drill barrel to rotate, and a drill bit is installed on the bottom wall of the outer drill barrel.

[0010] In the above-mentioned highway roadbed detection sampling device, the internal sampling component includes an inner cylinder rotatably connected to the inner wall of the outer drill cylinder, and four Z-shaped film guide channels are opened on the inner cylinder along the circumferential direction. The Z-shaped film guide channel is composed of two upper and lower transverse sections 1 and a longitudinal section 1 commonly connected between the two transverse sections 1, and the upper transverse section 1 passes through the outer wall of the inner cylinder, and the lower transverse section 1 passes through the inner wall of the inner cylinder.

[0011] In the above-mentioned highway roadbed detection sampling device, an inverted L-shaped slide rail corresponding to the Z-shaped film guide channel is provided on the inner wall of the inner cylinder, and the inverted L-shaped slide rail is composed of a transverse section 2 that passes through the inner cylinder and a longitudinal section 2 that is connected to the transverse section 2 and is provided on the inner wall of the inner cylinder, and the bottom end of the longitudinal section 2 is higher than the lower transverse section 1.

[0012] In the above-mentioned highway roadbed detection and sampling device, an L-shaped slider is slidably connected to the inverted L-shaped slide rail, and the bottom wall of the horizontal section of the slider is fixedly connected with multiple pins, and the bottom wall of the horizontal section and the bottom wall of the longitudinal section of the slider are both provided with anti-collision gaskets.

[0013] In the above-mentioned highway roadbed detection sampling device, the film covering assembly includes a support plate fixedly connected to the upper outer wall of the inner cylinder, and the support plate is provided with four installation grooves for installing the rolled protective film, and the support plate is provided with a film guide port passing through the installation groove, and the film guide port corresponds to the upper transverse section, and the protective film is delivered to the interior of the inner cylinder through the film guide port and the Z-shaped film guide channel.

[0014] In the above-mentioned highway roadbed detection sampling device, the separation component includes a separation chamber in which the top wall of the inner cylinder and the bottom wall of the slide are fixedly connected, and the inner bottom wall of the separation chamber is fixedly connected with four L-shaped limit blocks staggered with the Z-shaped film guide channel in the circumferential direction, and the inner top wall of the separation chamber is fixedly connected with a limit frame corresponding to the L-shaped limit blocks.

[0015] In the above-mentioned highway roadbed detection and sampling device, a plurality of covering plates are distributed radially along the separation chamber on the limit frame, and a number of fan-shaped isolation plates corresponding to the covering plates are distributed above and below in the L-shaped limit block. The straight edge of the fan-shaped isolation plate is blade-shaped, and an extended arc plate is fixedly connected to the fan-shaped arc edge of the fan-shaped isolation plate, and a groove for connecting with the bottom of the covering plate is provided on the extended arc plate.

[0016] In the above-mentioned highway roadbed detection and sampling device, the driving assembly includes four bin doors hinged on the outer wall of the separation bin corresponding to the L-shaped limit blocks, and the bin doors are radially slidably connected to a pushing frame along the separation bin, the pushing frame corresponds to the topmost fan-shaped isolation plate, and the bin door is fixedly connected to the side close to the covering plate with a spring 1 for pushing the covering plate to move.

[0017] In the above-mentioned highway roadbed detection and sampling device, the inner bottom wall of the separation bin is connected to a feeding ring 1 that pushes the fan-shaped isolation plate to move by sliding up and down through spring 2, and the inner top wall of the separation bin is connected to a feeding ring 2 that is driven to slide up and down by an electric slider, the bottom wall of the feeding ring 2 is fixedly connected to a limit part corresponding to the covering plate, and the inner top wall of the separation bin is connected to a blocking part that is driven to slide up and down by the electric slider.

[0018] Compared with the existing technology, the advantages of the present invention are: 1. By cooperating with the outer drill tube, the inner tube and the covering assembly, the inner and outer double tubes are set to minimize the disturbance to the sample soil. At the same time, the protective film is used to separate the inner tube and the sample soil, reducing the contamination of the sample soil; the circumferential contact surface between the sample soil and the inner tube is isolated by four protective films, reducing the contamination of the sample soil by the inner wall of the inner tube, and reducing the workload of subsequent cleaning of the inner wall of the inner tube; the sample soils of different depths are isolated and protected by the protective film in turn, effectively reducing the mixing of upper layer materials into the lower layer sample soil, and reducing the impact between sample soils of different depths.

[0019] 2. Through the combination of covering plates and fan-shaped isolation plates, soil samples at different depths can be quickly separated before being taken out. The four fan-shaped isolation plates together form a circular base to support the soil samples above. The operation is efficient and can prevent the differences in compaction and bearing capacity characteristics of soil samples at different depths from being masked when they are taken out, making it difficult to accurately identify the specific characteristics of each layer, and thus making it impossible to take appropriate engineering measures for specific layers.

[0020] 3. Through the coordination of the protective film, the covering plate and the fan-shaped isolation plate, the wrapping strength of the protective film is enhanced, the integrity of the sample soil structure is guaranteed, and the original state of the sample soil is maintained; the fan-shaped isolation plate separates the sample soil into layers, and at the same time, the movement of the fan-shaped isolation plate drives the covering plate to form a circular side guard for secondary protection of the film side wall of the sample soil. The circular side guard composed of multiple covering plates is rotated to form a more stable connection between the circular side guard and the circular bottom support, which is convenient for the transfer of the sample soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 A schematic diagram of the overall structure.

[0023] Figure 2 Schematic diagram of the structure of the outer drill barrel and part of the longitudinal isolation mechanism.

[0024] Figure 3 Schematic diagram of the cross-sectional structure of the inner tube.

[0025] Figure 4 Schematic diagram of the cross-sectional structure of the separation chamber.

[0026] Figure 5 A partial structural diagram of separation components and isolation components.

[0027] Figure 6 for Figure 4 Schematic diagram of the structure at point A.

[0028] Figure 7 Schematic diagram of the changes before and after the fan-shaped isolation plate moves.

[0029] Figure 8 Schematic diagram of the changes of the cladding plate before and after rotation.

[0030] Figure 9 Schematic diagram of the changes before and after soil sample separation.

[0031] Figure 10 Schematic diagram of the structure of the isolation component.

[0032] Figure 11 It is a partial structural cross-sectional diagram of the isolation component and the drive component.

[0033] In the figure: 1. support mechanism; 11. support frame; 12. pulley drive group; 13. slide; 14. hydraulic rod; 2. outer drill tube; 3. longitudinal isolation mechanism; 31. internal sampling assembly; 311. inner tube; 312. Z-shaped film guide channel; 313. inverted L-shaped slide rail; 314. slide block; 315. pin; 32. film coating assembly; 321. support plate; 322. mounting groove; 323. film guide port; 4. transverse isolation mechanism; 41. separation assembly; 411. separation bin; 412. L-shaped limit block; 413. limit frame; 42. isolation assembly; 421. covering plate; 422. fan-shaped isolation plate; 423. extended arc plate; 43. drive assembly; 431. bin door; 432. push frame; 433. feeding ring 1; 434. feeding ring 2; 435. limit member; 436. blocking member. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Reference Figures 1 to 2 A highway roadbed detection and sampling device includes a support mechanism 1, which includes a support frame 11. Two hydraulic rods 14 are installed on the support frame 11, and the telescopic end of the hydraulic rod 14 is equipped with a pulley drive group 12. The telescopic end of the hydraulic rod 14 is slidably connected to a slide 13 arranged above the pulley drive group 12; an outer drill barrel 2 for core drilling is provided on the pulley drive group 12, and a longitudinal isolation mechanism 3 is provided on the outer drill barrel 2. The longitudinal isolation mechanism 3 and the slide 13 are jointly provided with a transverse isolation mechanism 4; the pulley drive group 12 consists of a fixed frame fixedly connected to the telescopic end of the hydraulic rod 14 and a pulley group installed on the fixed frame. The pulley group drives the outer drill barrel 2 to rotate, and a drill bit is installed on the bottom wall of the outer drill barrel 2.

[0036] Before sampling, the equipment is moved to the sampling site, and the outer drill barrel 2 is driven to rotate by the pulley drive group 12. The telescopic end of the hydraulic rod 14 drives the pulley drive group 12 and the outer drill barrel 2 to move downward and drill into the roadbed. The direct deepening method is used for sampling, and sampling is carried out through the longitudinal isolation mechanism 3. While sampling, the soil samples at different depths are prevented from being contaminated. After drilling down to the specified sampling depth, the sampling is ended, and the pulley drive group 12 and the outer drill barrel 2 are lifted by the hydraulic rod 14. The soil sample inside the outer drill barrel 2 is pushed from bottom to top by an external hydraulic device (not shown in the figure) or a push rod in conjunction with the hydraulic rod 14, and the soil samples at different depths are separated and sampled by the transverse isolation mechanism 4.

[0037] Reference Figures 1 to 2 The longitudinal isolation mechanism 3 includes an internal sampling component 31 arranged on the outer drill tube 2 for separating the outer drill tube 2 and the drilled soil sample. The internal sampling component 31 is provided with a covering component 32 for longitudinally covering the outer wall of the soil sample. The longitudinal covering prevents the soil samples at different depths from being contaminated during the sampling process.

[0038] Reference Figures 2 to 3 The inner sampling assembly 31 includes an inner cylinder 311 rotatably connected to the inner wall of the outer drill cylinder 2, and the inner cylinder 311 is provided with four Z-shaped film guide channels 312 along the circumferential direction. The Z-shaped film guide channel 312 is composed of two upper and lower transverse sections 1 and a longitudinal section 1 connected between the two transverse sections 1. The upper transverse section 1 passes through the outer wall of the inner cylinder 311, and the lower transverse section 1 passes through the inner wall of the inner cylinder 311; the inner wall of the inner cylinder 311 is provided with an inverted L-shaped slide rail 313 corresponding to the Z-shaped film guide channel 312, and the inverted L-shaped slide rail 313 is composed of a transverse section 2 passing through the inner cylinder 311 and a longitudinal section 2 connected to the transverse section 2 and opened on the inner wall of the inner cylinder 311, and the bottom end of the longitudinal section 2 is higher than the lower transverse section 1; an L-shaped slider 314 is slidably connected to the inverted L-shaped slide rail 313, and a plurality of pins 315 are fixedly connected to the bottom wall of the horizontal section of the slider 314, and anti-collision gaskets are provided on the bottom wall of the horizontal section and the bottom wall of the longitudinal section 2 of the slider 314.

[0039] Reference Figures 2 to 3 The coating assembly 32 includes a support plate 321 fixedly connected to the upper outer wall of the inner cylinder 311. The support plate 321 is provided with four installation grooves 322 for installing the rolled protective film. The support plate 321 is provided with a film guide port 323 passing through the installation groove 322. The film guide port 323 corresponds to the upper horizontal section. The protective film is delivered to the interior of the inner cylinder 311 through the film guide port 323 and the Z-shaped film guide channel 312.

[0040] Before the outer drill tube 2 drills into the roadbed, check whether the protective film roll in the installation groove 322 is sufficient, and tie a counterweight plate at the moving end of the protective film roll so that the moving end of the protective film roll passes through the film guide opening 323, the upper transverse section 1, the longitudinal section 1, and the lower transverse section 1 in sequence. When the moving end of the protective film roll passes through one of the transverse sections, the counterweight plate is removed, and the Z-shaped film guide channel 312 that guides the protective film for steering is chamfered to reduce friction. The slider 314 is manually fitted with the end of the protective film roll that passes through the lower transverse section 1, and the pin 315 pierces part of the protective film up and down so that the end of the protective film is level with the roadbed before sampling. The protective film can be a PET film with good tear resistance.

[0041] Taking sampling of the base layer, subbase layer and soil base as an example, when the outer drill tube 2 drills into the roadbed, it drills out a downward space for the inner tube 311, and the inner tube 311 moves downward with the outer drill tube 2. The slider 314 is provided with a counterweight, and the sample soil moves upward relative to the inner tube 311. The protective film separates the inner tube 311 and the sample soil. The circumferential contact surface between the sample soil and the inner tube 311 is isolated by four pieces of protective film, which reduces the contamination of the sample soil by the inner wall of the inner tube 311, and at the same time reduces the workload of subsequent cleaning of the inner wall of the inner tube 311.

[0042] Under the influence of the counterweight of the slider 314, the pins 315 cooperate with the sample soil to clamp the horizontal section of the protective film up and down to prevent the protective film from shifting when the sample soil moves upward. The upward moving sample soil pushes the slider 314 to slide upward on the inverted L-shaped slide rail 313, and the end of the protective film is pushed and moved by the sample soil, pulling the protective film roll out of the film. The sample soils at different depths are isolated and protected by the released protective film in turn, effectively reducing the mixing of the upper sample soil into the lower sample soil, thereby reducing the contamination between the sample soils at different depths.

[0043] After drilling downward to the specified sampling depth and the interior of the inner tube 311 is gradually filled with sample soil, sampling is completed, the outer drill tube 2 and the inner tube 311 are moved upward and reset, and the sample soil inside the inner tube 311 is brought out of the roadbed. The protective film roll that has passed through the lower transverse section is manually cut off circumferentially by a tool to facilitate subsequent sampling of the sample soil and the protective film covering the outside.

[0044] Reference Figure 1 and Figure 4 The lateral isolation mechanism 4 includes an isolation component 42 and a separation component 41 arranged on the slide 13 to provide support for the isolation component 42. The isolation component 42 is used to laterally isolate the sample soil after longitudinal coating. The lateral isolation facilitates the separation and sampling of soil samples at different depths. The separation component 41 is provided with a driving component 43 for driving the isolation component 42 to operate.

[0045] Reference Figure 1 、 Figures 4 and 5 The separation component 41 includes a separation chamber 411 to which the top wall of the inner cylinder 311 and the bottom wall of the slide 13 are fixedly connected. The inner bottom wall of the separation chamber 411 is fixedly connected with four L-shaped limit blocks 412 that are staggered with the Z-shaped film guide channel 312 in the circumferential direction. The inner top wall of the separation chamber 411 is fixedly connected with a limit frame 413 corresponding to the L-shaped limit block 412.

[0046] Reference Figure 4 、 Figure 5 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10The isolation assembly 42 includes a covering plate 421 for circumferentially covering the sample soil and the protective film, and a fan-shaped isolation plate 422 for dividing and isolating the sample soil at different depths. A plurality of covering plates 421 are radially distributed along the separation bin 411 on the limiting frame 413, and a corresponding number of fan-shaped isolation plates 422 are distributed above and below in the L-shaped limiting block 412. The straight edge of the fan-shaped isolation plate 422 is in the shape of a knife edge, and an extended arc plate 423 is fixedly connected to the fan-shaped arc edge of the fan-shaped isolation plate 422. The extended arc plate 423 is provided with a groove for connecting with the bottom of the covering plate 421.

[0047] Reference Figures 4 to 6 and Figure 11 The driving assembly 43 includes four bin doors 431 hinged on the outer wall of the separation bin 411 and corresponding to the L-shaped limit blocks 412. The bin door 431 is radially connected to a pushing frame 432 along the separation bin 411 for radial sliding movement. The pushing frame 432 corresponds to the uppermost fan-shaped isolation plate 422. The bin door 431 is fixedly connected to a spring 1 (not shown in the figure) on the side close to the covering plate 421 for pushing the covering plate 421 to move; the inner bottom wall of the separation bin 411 is slidably connected to a feeding ring 1 433 for pushing the fan-shaped isolation plate 422 to move through a spring 2 (not shown in the figure); the inner top wall of the separation bin 411 is driven up and down by an electric slider to slide up and down and is connected to a feeding ring 2 434; the bottom wall of the feeding ring 2 434 is fixedly connected to a limit piece 435 corresponding to the covering plate 421, and the inner top wall of the separation bin 411 is driven up and down by the electric slider to slide up and down and is connected to a blocking piece 436.

[0048] After the sampling is completed, the sample soil inside the inner cylinder 311 is pushed upward from the bottom, and the sample soil drives the slider 314 to gradually slide to the top of the longitudinal section 2. Then, the slider 314 is continuously pushed upward by the sample soil and flips over to the transverse section 2 at the top of the longitudinal section 2, releasing the limit on the end of the protective film; when all the sample soil is sampled, the slider 314 can be flipped by manually pushing it and then slides back to its original position under gravity.

[0049] The sample soil continues to move upward into the middle of the separation bin 411 , and the fan-shaped isolation plate 422 is limited by the L-shaped limit block 412 , and the top wall height of the L-shaped limit block 412 is the same as the bottom wall height of the uppermost fan-shaped isolation plate 422 ; the covering plate 421 is limited laterally by the limit frame 413 .

[0050] The limiting member 435 includes an inverted U-shaped limiting plate arranged between the innermost and middle covering plates 421 and a T-shaped block pressing the innermost covering plate 421 downward. The innermost and middle covering plates 421 are separated by the inverted U-shaped limiting plate, and the innermost covering plate 421 moves downward by being pressed by the T-shaped block.

[0051] The blocking member 436 is composed of a circular ring member that is slidably connected to the inner top wall of the separation chamber 411 and a blocking bar fixed to the bottom wall of the circular ring member and corresponding to the innermost covering plate 421. The circular ring member drives the blocking bar to move up and down. The blocking bar is used to limit the inward movement distance of the innermost covering plate 421. The initial position of the blocking bar is low, and the bottom wall of the blocking bar is lower than the top wall of the covering plate 421.

[0052] Before sampling, the warehouse door 431 is opened to put on the covering plate 421 and the fan-shaped isolation plate 422. After putting on the plates, the uppermost fan-shaped isolation plate 422 is docked with the lower end of the corresponding covering plate 421 through the groove opened by the extended arc plate 423 on it; when sampling and separating, the limiter 435 moves down and the blocking member 436 moves up, the blocking bar releases the obstruction of the covering plate 421 moving inward, and the inverted U-shaped limiter plate limits the position of the covering plate 421 in the middle position; the pushing frame 432 is manually pushed toward the sample soil direction, and the pushing frame 432 pushes the uppermost fan-shaped isolation plate 422, and the fan-shaped isolation plate 422 drives the innermost covering plate 421 to move synchronously toward the sample soil direction, and the fan-shaped isolation plate 422 separates the sample soil in layers.

[0053] It should be noted that, in order to ensure that the bin door 431 is in a non-rotatable state when the pushing frame 432 is in operation, the bin door 431 and the separation bin 411 can be locked by a positioning pin (not shown in the figure).

[0054] Reference Figure 10 The adjacent fan-shaped isolation plates 422 are connected by an extended arc plate 423. Specifically, one end of the extended arc plate 423 is fixedly connected with a protrusion 1, and the other end of the extended arc plate 423 is provided with a groove 1 adapted to the protrusion 1. The protrusion 1 on the extended arc plate 423 is engaged with the groove 1 on the adjacent extended arc plate 423. One side of the covering plate 421 is evenly fixedly connected with a plurality of protrusions 2 in the vertical direction, and the other side is provided with a groove 2 adapted to the protrusion 2 in the vertical direction. The adjacent covering plates 421 are connected through the protrusions 2 and the groove 2.

[0055] The four fan-shaped isolation plates 422 together form a circular base supporting the sample soil above. At the same time, the movement of the fan-shaped isolation plates 422 drives the covering plates 421 to form a circular side guard for secondary protection of the covered side walls of the sample soil, thereby ensuring the integrity of the sample soil structure.

[0056] The sample soil is pushed upward from the bottom, and the upper layer of the sample soil separated and covered by the isolation assembly 42 is sampled out from the top of the separation chamber 411. The circular side guard composed of multiple covering plates 421 can be manually rotated, and the circular side guard is rotated forty-five degrees on the circular bottom support composed of multiple fan-shaped isolation plates 422 on the lower side, so that the fan-shaped isolation plates 422 and the covering plates 421 are staggered (such as Figure 8As shown in the figure), a more stable connection is formed between the circular side guards and the circular base, which facilitates the transfer of soil samples.

[0057] The limiting member 435 moves downward, and the T-shaped block pushes and moves to the innermost covering plate 421, so that the bottom of the corresponding covering plate 421 is connected to the groove of the fan-shaped isolation plate 422. At the same time, the inverted U-shaped limiting plate limits the position of the outermost covering plate 421, so as to prepare for the next soil sample to be separated and covered.

[0058] Reference Figures 1 to 11 The specific operating steps of this highway roadbed detection sampling device are as follows:

[0059] Before sampling, move the equipment to the sampling location. When the pulley drive group 12 drives the outer drill tube 2 to drill into the roadbed, the protective film separates the inner tube 311 and the sample soil to reduce the contamination of the sample soil. Drill down to the specified sampling depth. After the interior of the inner tube 311 is gradually filled with sample soil, the sampling is completed.

[0060] The sample soil inside the inner cylinder 311 is pushed upward from the bottom, and the sample soil moves up into the middle of the separation chamber 411. The pushing frame 432 pushes the uppermost fan-shaped isolation plate 422, and the fan-shaped isolation plate 422 drives the corresponding covering plate 421 to move synchronously toward the sample soil. The four fan-shaped isolation plates 422 together form a circular bottom support for supporting the sample soil above. At the same time, the movement of the fan-shaped isolation plate 422 drives the covering plate 421 to form a circular side guard for secondary protection of the film side wall of the sample soil, thereby ensuring the integrity of the sample soil structure; the multiple layers of sample soil are separated and sampled in turn.

[0061] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A highway roadbed detection sampling device, comprising a support mechanism, characterized in that: The support mechanism includes a support frame, and two hydraulic rods are installed on the support frame in a front-to-back symmetrical manner. The telescopic ends of the hydraulic rods are equipped with a pulley drive group, and the telescopic ends of the hydraulic rods are slidably connected to a slide arranged above the pulley drive group. The pulley drive group is provided with an outer drill barrel for core drilling, and the outer drill barrel is provided with a longitudinal isolation mechanism, and the longitudinal isolation mechanism and the slide are jointly provided with a transverse isolation mechanism; The longitudinal isolation mechanism includes an inner sampling assembly provided on the outer drill tube for separating the outer drill tube from the drilled soil sample, and a covering assembly provided on the inner sampling assembly for longitudinally covering the outer wall of the soil sample, thereby preventing soil samples at different depths from being contaminated during the sampling process; The transverse isolation mechanism includes an isolation component and a separation component provided on a carriage for providing support for the isolation component, and the isolation component is used to laterally isolate and separate the soil samples after longitudinal film coating. The isolation component includes a covering plate for circumferentially covering the soil samples and the protective film, and a sector-shaped isolation plate for separating and isolating soil samples at different depths. The separation component is provided with a drive component for driving the isolation component to operate. The inner sampling assembly includes an inner cylinder rotatably connected to the inner wall of the outer drill cylinder, and the inner cylinder is provided with four Z-shaped membrane guide channels along the circumferential direction. The Z-shaped membrane guide channels are composed of two upper and lower transverse sections 1 and a longitudinal section 1 connected between the two transverse sections 1, and the upper transverse section 1 penetrates the outer wall of the inner cylinder, and the lower transverse section 1 penetrates the inner wall of the inner cylinder; The separation assembly includes a separation chamber to which the top wall of the inner cylinder and the bottom wall of the slide are fixedly connected, and the inner bottom wall of the separation chamber is fixedly connected along the circumferential direction with four L-shaped limit blocks staggered with the Z-shaped film guide channels, and the inner top wall of the separation chamber is fixedly connected with a limit frame corresponding to the L-shaped limit blocks; There are multiple covering plates distributed radially along the separation bin on the limit frame, and fan-shaped isolation plates corresponding to the number of covering plates are distributed above and below in the L-shaped limit block. The straight edges of the fan-shaped isolation plates are blade-shaped, and extended arc plates are fixedly connected to the fan-shaped arc edges of the fan-shaped isolation plates, and the extended arc plates are provided with grooves for connecting with the bottom of the covering plates.

2. A highway roadbed detection sampling device according to claim 1, characterized in that: The pulley drive group consists of a fixed frame fixedly connected to the telescopic end of the hydraulic rod and a pulley group assembled on the fixed frame. The pulley group drives the outer drill barrel to rotate, and a drill bit is installed on the bottom wall of the outer drill barrel.

3. A highway roadbed detection sampling device according to claim 1, characterized in that: The inner wall of the inner cylinder is provided with an inverted L-shaped slide rail corresponding to the Z-shaped film guiding channel, and the inverted L-shaped slide rail is composed of a transverse section 2 which runs through the inner cylinder and a longitudinal section 2 which is connected to the transverse section 2 and is provided on the inner wall of the inner cylinder, and the bottom end of the longitudinal section 2 is higher than the lower transverse section 1.

4. A highway roadbed detection sampling device according to claim 3, characterized in that: An L-shaped slider is slidably connected to the inverted L-shaped slide rail, and a plurality of pins are fixedly connected to the bottom wall of the horizontal section of the slider. Anti-collision pads are provided on the bottom wall of the horizontal section and the bottom wall of the longitudinal section of the slider.

5. A highway roadbed detection sampling device according to claim 1, characterized in that: The coating assembly includes a support plate fixedly connected to the upper outer wall of the inner cylinder, and the support plate is provided with four installation grooves for installing the rolled protective film, and the support plate is provided with a film guide port passing through the installation groove, and the film guide port corresponds to the upper transverse section. The protective film is delivered to the interior of the inner cylinder through the film guide port and the Z-shaped film guide channel.

6. A highway roadbed detection sampling device according to claim 1, characterized in that: The driving assembly includes four bin doors hinged on the outer wall of the separation bin and corresponding to the L-shaped limit blocks, and a pushing frame is connected to the bin door for radial sliding along the separation bin, the pushing frame corresponds to the topmost fan-shaped isolation plate, and a spring is fixedly connected to the side of the bin door close to the covering plate to push the covering plate to move.

7. A highway roadbed detection sampling device according to claim 6, characterized in that: The inner bottom wall of the separation bin is connected to a feeding ring 1 that pushes the fan-shaped isolation plate to move up and down through spring 2, and the inner top wall of the separation bin is connected to a feeding ring 2 that is driven to slide up and down by an electric slider. The bottom wall of the feeding ring 2 is fixedly connected to a limit piece corresponding to the covering plate, and the inner top wall of the separation bin is connected to a blocking piece that is driven to slide up and down by the electric slider.

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