A coring device and coring method for measuring earthwork backfill compaction.

Abstract

This invention discloses a core sampling device and method for measuring earthwork backfill compaction, relating to the field of earthwork backfill compaction measurement technology. The core sampling device for earthwork backfill compaction measurement includes a base frame, a pre-cleaning and leveling mechanism, and an auxiliary core sampling mechanism. The pre-cleaning and leveling mechanism includes a push plate, a moving frame, a connecting plate, a base plate, and scrapers. The push plate is fixedly connected to the output end of a cylinder. Two moving frames are symmetrically arranged below the push plate, and two base plates are symmetrically arranged below the core sampling cylinder. The connecting plate is located between the moving frames and the base plates. Two scrapers are respectively fixedly connected to the bottom of the two base plates at their adjacent ends. Through the pre-cleaning and leveling mechanism, during the earthwork backfill compaction measurement process, debris, loose soil layers, and uneven parts on the land surface can be scraped away, making the land surface smoother and ensuring consistent surface cleaning before each core sampling, reducing measurement errors caused by incomplete cleaning or improper cleaning methods.

Description

Technical Field

[0001] This invention relates to the field of earthwork backfill compaction measurement technology, specifically to a core sampling device and method for earthwork backfill compaction measurement. Background Technology

[0002] In civil engineering construction, earthwork backfill compaction measurement is a key link to ensure the stability and durability of the foundation structure. Whether it is building foundation, roadbed or other earthwork projects, the compaction quality will directly affect the safety and service life of the project. Therefore, accurately measuring the compaction degree of earthwork backfill is an indispensable part of the construction process.

[0003] Traditional methods for measuring earthwork backfill compaction mainly include core sampling, sand cone method, and ring cutter method. However, when performing core sampling for earthwork backfill compaction measurement, it is often necessary to manually clean the soil surface at the test location before sampling. Manually cleaning the soil surface often makes it difficult to completely remove debris and loose soil layers, resulting in uneven soil surfaces. This affects the insertion depth of the core tube and the sampling quality, leading to inaccurate compaction measurement results. Moreover, the manual cleaning method is prone to variation due to differences in the operator's experience and operating habits. Excessive cleaning force can damage the original state of the soil, while insufficient cleaning force will not achieve the desired cleaning effect. This results in inconsistent cleaning results each time, leading to different soil surface conditions before each core sampling, thus introducing measurement errors.

[0004] In view of this, the present invention proposes a core sampling device and method for measuring earthwork backfill compaction, in order to make up for and improve the deficiencies of the prior art. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a core sampling device and method for measuring earthwork backfill compaction, thereby resolving the corresponding technical issues raised in the background section.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In one aspect, a core sampling device for measuring earthwork backfill compaction is provided, which includes a base frame, a pre-cleaning and leveling mechanism and an auxiliary core sampling mechanism. A cylinder is fixedly connected to the top of the base frame, and a core sampling cylinder is provided below the output end of the cylinder.

[0008] The pre-cleaning and leveling mechanism includes a push plate, a movable frame, a connecting plate, a base plate, and a scraper. The push plate is fixedly connected to the cylinder output end. Two movable frames are symmetrically arranged below the push plate. Two base plates are symmetrically arranged below the core-taking cylinder. The connecting plate is arranged between the movable frames and the base plates. Two scrapers are respectively fixedly connected to the bottom of the two base plates at their close ends.

[0009] The auxiliary core-taking mechanism includes a fixed cylinder, a driven gear, a spiral sleeve, and a driving gear. The fixed cylinder is located above the core-taking cylinder, the driven gear is located between the fixed cylinder and the core-taking cylinder, the spiral sleeve is located behind the fixed cylinder, and the driving gear is fixedly connected to the outer surface of the lower end of the spiral sleeve.

[0010] Optionally, the pre-cleaning and leveling mechanism further includes two push rods symmetrically fixedly connected to the bottom of the push plate. A movable plate is fixedly connected to the bottom of the push rod. A slider is fixedly connected to the opposite end of each of the two movable plates. Two sliding grooves are symmetrically opened on the inner walls of both sides of the base frame. The slider is slidably connected in the sliding groove.

[0011] Optionally, each of the two movable plates is fixedly connected to an arc-shaped sliding plate at one end close to each other, and the arc-shaped sliding plate is in contact with the outer surface of the fixed cylinder. The arc-shaped sliding plate has a vertical groove on the side facing the fixed cylinder. The movable frame is fixedly connected vertically to the movable plate. A pair of first connecting shafts are fixedly connected symmetrically on both sides of the movable frame. A pair of driven plates are fixedly connected symmetrically on both sides of the two base plates at one end far from each other. A second connecting shaft is fixedly connected to the end of the driven plate far from the base plate. The connecting plate is rotatably connected between the second connecting shaft and the first connecting shaft.

[0012] Optionally, a pair of limiting rods are symmetrically fixedly connected to the middle of the opposite ends of the two base plates, and the limiting rods are slidably connected to the lower end of the base frame. Support strips are fixedly connected to the bottom of the two base plates.

[0013] Optionally, the auxiliary core-taking mechanism further includes a pair of sleeve plates symmetrically fixedly connected to the inner top wall of the base frame, a U-shaped plate slidably connected between the pair of sleeve plates, the U-shaped plate being disposed below the push plate, a pair of return springs symmetrically fixedly connected between the top of the U-shaped plate and the inner top wall of the sleeve plate, a connecting column fixedly connected to the bottom of the U-shaped plate, the bottom of the connecting column being fixedly connected to the top of the fixed cylinder, and a vertical strip fixedly connected to the outer surface of the fixed cylinder.

[0014] Optionally, a fixing plate is fixedly connected to the middle of the upper rear end of the base frame, a fixing column is fixedly connected to the bottom of the fixing plate, a baffle is fixedly connected to the bottom of the fixing column, an ear plate is fixedly connected to the outer rear surface of the fixing cylinder, and the fixing column and the ear plate are slidably connected through the fixing column. A spiral groove is formed on the outer lower surface of the fixing column, a spiral sleeve is rotatably connected to the bottom of the ear plate, and the spiral sleeve is movably connected to the outer lower surface of the fixing column through the spiral groove. A linkage shaft is rotatably connected to the bottom of the fixing cylinder, a driven gear is fixedly connected to the outer surface of the linkage shaft, and the driven gear is meshed with the driving gear. A cover plate is fixedly connected to the bottom of the fixing cylinder, and both the driven gear and the driving gear are disposed inside the cover plate. The linkage shaft and the spiral sleeve are rotatably connected through the cover plate.

[0015] Optionally, the bottom of the linkage shaft is provided with an installation groove, the top of the core-taking cylinder is fixedly connected with a clamping plate, and the clamping plate is set in the installation groove. The lower end of the linkage shaft is symmetrically threaded with a pair of threaded rods, and each of the pair of threaded rods is rotatably connected to a positioning plate at one end close to each other. The positioning plate is slidably connected in the installation groove, and the clamping plate is set between the pair of positioning plates. The positioning plate is used to position the clamping plate.

[0016] Secondly, a core sampling method for measuring earthwork backfill compaction is provided, utilizing the core sampling device for measuring earthwork backfill compaction described in the first aspect, wherein the core sampling method for measuring earthwork backfill compaction includes:

[0017] Step 1: The land surface is pre-treated and leveled using a pre-cleaning and leveling mechanism;

[0018] Step 2: Positioning and core extraction are performed using a core extraction tube.

[0019] Optionally, step one includes: activating the device to move the two scrapers in opposite directions and scrape away debris and loose soil from the land surface, and leveling the land;

[0020] Step two includes: driving the core-retrieving cylinder to move downward and rotate, and performing positioning and core-retrieving operations by rotating and moving downward.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) By setting up a pre-cleaning and leveling mechanism, using the design of push plate, moving frame, connecting plate, bottom plate and scraper, during the measurement of earthwork backfill compaction, the two bottom plates can be driven to move in opposite directions, so that the two scrapers can pre-clean the soil surface, remove debris, loose soil and uneven parts from the soil surface, so that the soil surface is more level, thus making the soil at the measurement location more level, and ensuring that the degree of cleaning of the soil surface is consistent before each core sampling, reducing measurement errors caused by incomplete cleaning or improper cleaning methods.

[0023] (2) By setting up an auxiliary core sampling mechanism, using the design of a fixed cylinder, driven gear, spiral sleeve and driving gear, the spiral sleeve can be driven to move downward in a spiral manner on the outer surface of the fixed column during the process of the core sampling cylinder being driven downward. With the meshing contact between the driving gear and the driven gear, the core sampling cylinder can be driven to rotate synchronously while moving downward, so as to achieve the effect of rotating downward. This allows the core sampling cylinder to cut into the soil more smoothly and effectively, thereby reducing the resistance encountered during the core sampling process, improving the efficiency of core sampling, and facilitating the core sampling operation of the soil to be measured. At the same time, the rotation action can also ensure that the core sampling cylinder cuts the soil evenly during the core sampling process, avoiding uneven sampling caused by direct insertion of the core sampling cylinder, thereby improving the accuracy and reliability of the measurement results, and reducing the force of the core sampling cylinder directly impacting the soil surface, making the core sampling cylinder more evenly stressed during the core sampling process, avoiding wear of the core sampling cylinder caused by direct impact, thereby extending the service life of the core sampling cylinder and reducing the maintenance cost of the equipment. Attached Figure Description

[0024] Figure 1 This invention provides an overall structural schematic diagram of a core sampling device for measuring earthwork backfill compaction.

[0025] Figure 2 This is a schematic diagram showing the connection relationship of the pre-cleaning and leveling mechanism in this invention;

[0026] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 4 This is a schematic diagram of the connection relationship of the base plate in this invention;

[0028] Figure 5 This is a schematic diagram of the connection relationship of the U-shaped plates in this invention;

[0029] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0030] Figure 7 This is a schematic diagram showing the disassembled structure of the fixed column and the spiral sleeve in this invention;

[0031] Figure 8 This is a schematic diagram of the connection relationship at the mounting slot in this invention.

[0032] The numbers on the map are:

[0033] 1. Base frame; 2. Cylinder; 3. Core tube;

[0034] 4. Pre-cleaning and leveling mechanism; 401. Push plate; 402. Push rod; 403. Moving plate; 404. Arc-shaped sliding plate; 405. Vertical groove; 406. Moving frame; 407. First connecting shaft; 408. Connecting plate; 409. Second connecting shaft; 410. Driven plate; 411. Base plate; 412. Limiting rod; 413. Support bar; 414. Scraper; 415. Slider; 416. Slide groove;

[0035] 5. Auxiliary core-taking mechanism; 501. Sleeve plate; 502. U-shaped plate; 503. Return spring; 504. Connecting column; 505. Fixed cylinder; 506. Vertical bar; 507. Linkage shaft; 508. Driven gear; 509. Ear plate; 510. Fixed plate; 511. Fixed column; 512. Spiral groove; 513. Baffle; 514. Spiral sleeve; 515. Drive gear; 516. Cover plate; 517. Mounting groove; 518. Clamping plate; 519. Positioning plate; 520. Threaded rod. Detailed Implementation

[0036] 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.

[0037] Example 1: Please refer to Figures 1 to 8 As shown, the embodiment of the present invention provides a core sampling device for measuring earthwork backfill compaction, including a base frame 1, a pre-cleaning and leveling mechanism 4 and an auxiliary core sampling mechanism 5. A cylinder 2 is fixedly connected to the top of the base frame 1, and a core sampling cylinder 3 is provided below the output end of the cylinder 2.

[0038] The pre-cleaning and leveling mechanism 4 includes a push plate 401, a movable frame 406, a connecting plate 408, a base plate 411, and a scraper 414. The push plate 401 is fixedly connected to the output end of the cylinder 2. Two movable frames 406 are symmetrically arranged below the push plate 401. Two base plates 411 are symmetrically arranged below the core-taking cylinder 3. The connecting plate 408 is arranged between the movable frame 406 and the base plate 411. Two scrapers 414 are respectively fixedly connected to the bottom of the two base plates 411 at their close ends.

[0039] The auxiliary core-taking mechanism 5 includes a fixed cylinder 505, a driven gear 508, a spiral sleeve 514, and a driving gear 515. The fixed cylinder 505 is disposed above the core-taking cylinder 3, the driven gear 508 is disposed between the fixed cylinder 505 and the core-taking cylinder 3, the spiral sleeve 514 is disposed on the rear side of the fixed cylinder 505, and the driving gear 515 is fixedly connected to the outer surface of the lower end of the spiral sleeve 514.

[0040] The pre-cleaning and leveling mechanism 4 also includes two push rods 402 that are symmetrically fixedly connected to the bottom of the push plate 401. A movable plate 403 is fixedly connected to the bottom of the push rod 402. A slider 415 is fixedly connected to the opposite ends of the two movable plates 403. Two sliding grooves 416 are symmetrically opened on the inner walls of both sides of the base frame 1. The slider 415 is slidably connected in the sliding groove 416.

[0041] Two movable plates 403 are fixedly connected to an arc-shaped sliding plate 404 at their close ends, and the arc-shaped sliding plate 404 is in contact with the outer surface of the fixed cylinder 505. The arc-shaped sliding plate 404 has a vertical groove 405 on the side facing the fixed cylinder 505. The movable frame 406 is fixedly connected to the movable plate 403 perpendicularly. A pair of first connecting shafts 407 are fixedly connected symmetrically on both sides of the movable frame 406. A pair of driven plates 410 are fixedly connected symmetrically on both sides of the two base plates 411 at their far ends. A second connecting shaft 409 is fixedly connected to the end of the driven plate 410 away from the base plate 411. The connecting plate 408 is rotatably connected between the second connecting shaft 409 and the first connecting shaft 407.

[0042] A pair of limiting rods 412 are symmetrically fixedly connected to the middle of the opposite ends of the two base plates 411, and the limiting rods 412 are slidably connected to the lower end of the base frame 1. Support strips 413 are fixedly connected to the bottom of the two base plates 411.

[0043] The effects achieved by this embodiment are as follows: Compared with the prior art, by setting up the pre-cleaning and leveling mechanism 4, and utilizing the design of the push plate 401, the moving frame 406, the connecting plate 408, the bottom plate 411 and the scraper 414, during the earthwork backfilling and compaction measurement process, the two bottom plates 411 can be driven to move in opposite directions, and the two scrapers 414 can be used to pre-clean the land surface, removing debris, loose soil layers and uneven parts from the land surface, making the land surface smoother, thereby making the land at the measurement location smoother, and ensuring that the degree of cleaning of the land surface is consistent before each core sampling, reducing measurement errors caused by incomplete cleaning or improper cleaning methods;

[0044] The design of the push plate 401 enables the power of the cylinder 2 to be evenly transmitted to the push rod 402, ensuring that the push rods 402 on both sides can move synchronously. This not only improves the overall stability of the pre-cleaning and leveling mechanism 4, but also ensures the synchronicity of the movement of the moving plates 403 on both sides, avoiding jamming or damage to the pre-cleaning and leveling mechanism 4 due to one side moving too fast or too slow, thus facilitating the subsequent driving of the base plate 411.

[0045] Among them, the limiting rod 412, which is slidably installed between the bottom plate 411 and the lower end of the base frame 1, can follow synchronously when the two bottom plates 411 move in opposite directions below the core tube 3 due to the connection of the connecting plate 408, and slide through the lower end of the base frame 1. This can assist in the movement of the bottom plate 411 and make the lateral movement of the bottom plate 411 more stable.

[0046] The support strip 413, which is fixedly installed at the bottom of the base plate 411, can fit in close contact with the ground surface and support the base plate 411, maintaining a distance between the base plate 411 and the ground surface. This prevents the base plate 411 from directly contacting the ground in the initial state, thereby reducing wear or damage to the base plate 411 due to long-term contact with the ground. At the same time, the design of the support strip 413 can also effectively distribute the weight of the base plate 411, reducing the direct pressure of the base plate 411 on the ground surface and preventing the ground surface from being over-compacted or damaged due to the weight of the base plate 411, thereby improving the accuracy of subsequent compaction measurements.

[0047] Example 2: Please refer to Figures 1 to 8 As shown, the auxiliary core-taking mechanism 5 provided in this embodiment of the invention also includes a pair of sleeve plates 501 symmetrically fixedly connected to the inner top wall of the base frame 1. A U-shaped plate 502 is slidably connected between the pair of sleeve plates 501. The U-shaped plate 502 is disposed below the push plate 401. A pair of return springs 503 are symmetrically fixedly connected between the top of the U-shaped plate 502 and the inner top wall of the sleeve plate 501. A connecting post 504 is fixedly connected to the bottom of the U-shaped plate 502. The bottom of the connecting post 504 is fixedly connected to the top of the fixed cylinder 505. A vertical strip 506 is fixedly connected to the outer surface of the fixed cylinder 505, and the vertical strip 506 is slidably connected to the vertical groove 405.

[0048] A fixing plate 510 is fixedly connected to the middle of the upper rear side of the base frame 1. A fixing column 511 is fixedly connected to the bottom of the fixing plate 510. A baffle 513 is fixedly connected to the bottom of the fixing column 511. An ear plate 509 is fixedly connected to the outer rear side of the fixing cylinder 505. The fixing column 511 and the ear plate 509 are slidably connected through the fixing column 511. A spiral groove 512 is opened on the outer lower end of the fixing column 511. A spiral sleeve 514 is rotatably connected to the bottom of the ear plate 509. The spiral sleeve 514 passes through the spiral groove. 512 is movably connected to the lower outer surface of the fixed column 511. The bottom of the fixed cylinder 505 is rotatably connected to the linkage shaft 507. The driven gear 508 is fixedly connected to the outer surface of the linkage shaft 507, and the driven gear 508 is meshed with the driving gear 515. The bottom of the fixed cylinder 505 is fixedly connected to the cover plate 516. Both the driven gear 508 and the driving gear 515 are set inside the cover plate 516. The linkage shaft 507 and the spiral sleeve 514 are rotatably connected through the cover plate 516.

[0049] The bottom of the linkage shaft 507 is provided with an installation groove 517. The top of the core tube 3 is fixedly connected with a clamping plate 518, and the clamping plate 518 is set in the installation groove 517. The lower end of the linkage shaft 507 is symmetrically threaded with a pair of threaded rods 520. The two threaded rods 520 are rotatably connected to a positioning plate 519 at one end close to each other. The positioning plate 519 is slidably connected in the installation groove 517. The clamping plate 518 is set between the two positioning plates 519, and the positioning plate 519 is used to position the clamping plate 518.

[0050] The effects achieved by this embodiment are as follows: Compared with the prior art, by setting up the auxiliary core-retrieving mechanism 5, and utilizing the design of the fixed cylinder 505, driven gear 508, spiral sleeve 514, and driving gear 515, during the process of the core-retrieving cylinder 3 being driven downward, the spiral sleeve 514 can be driven to move downward in a spiral manner on the outer surface of the fixed column 511. Combined with the meshing contact between the driving gear 515 and the driven gear 508, the core-retrieving cylinder 3 can be driven to rotate synchronously while moving downward, achieving a rotating downward movement effect, making the core-retrieving cylinder 3 move more smoothly and effectively. The core-taking cylinder 3 cuts into the soil, thereby reducing the resistance encountered during the core-taking process, improving the efficiency of core-taking, and facilitating the core-taking operation of the soil at the measurement site. At the same time, the rotation action can also ensure that the core-taking cylinder 3 cuts the soil evenly during the core-taking process, avoiding uneven sampling caused by direct insertion of the core-taking cylinder 3, thereby improving the accuracy and reliability of the measurement results, and reducing the force of the core-taking cylinder 3 directly impacting the soil surface, making the force on the core-taking cylinder 3 more even during the core-taking process, avoiding wear of the core-taking cylinder 3 caused by direct impact, thereby extending the service life of the core-taking cylinder 3 and reducing the maintenance cost of the equipment.

[0051] The design of the U-shaped plate 502 allows it to slide vertically downward between the two sleeve plates 501, providing stable support for the downward movement of the core-taking cylinder 3. The shape of the U-shaped plate 502 also allows it to make close contact with the lower surface of the push plate 401, ensuring that the pushing force of the push plate 401 can be effectively transmitted, thereby improving the stability and reliability of the core-taking process.

[0052] The meshing of the driven gear 508 and the driving gear 515, along with the helical motion of the helical sleeve 514, makes the rotation of the core-retrieving cylinder 3 more stable, thereby effectively ensuring that the core-retrieving cylinder 3 maintains a consistent rotational speed and direction during the core-retrieval process and improving the stability of core retrieval.

[0053] The design of the cover plate 516 can prevent dust from flying up during the subsequent core extraction process from adhering to the surfaces of the drive gear 515 and driven gear 508 and interfering with the meshing between them. This improves the service life of the driven gear 508 and drive gear 515 and reduces wear and failure of the driven gear 508 and drive gear 515 caused by dust.

[0054] Furthermore, the design of the threaded rod 520, the positioning plate 519, and the clamping plate 518 allows the two positioning plates 519 to fit against the outer walls of the two sides of the clamping plate 518, thereby providing stable support for the core sampling cylinder 3. This ensures that the core sampling cylinder 3 remains stable during the core sampling process, preventing the core sampling cylinder 3 from shaking or loosening. This reduces sampling failures caused by the shaking or loosening of the core sampling cylinder 3, avoids the need for repeated sampling, and further improves work efficiency.

[0055] Example 3: This embodiment of the invention provides a core sampling method for measuring earthwork backfill compaction. Using the aforementioned core sampling device for measuring earthwork backfill compaction, the core sampling method includes the following steps:

[0056] Step 1: The land surface is pre-treated and leveled using the pre-cleaning and leveling mechanism 4;

[0057] Step 2: Positioning and core extraction are performed using core extraction cylinder 3.

[0058] Furthermore, by measuring and analyzing the data from the extracted soil core, the compaction measurement results of the backfill can be obtained.

[0059] Specifically, step one includes: moving the two scrapers 414 in opposite directions to scrape away debris and loose soil from the land surface and level the land.

[0060] Step two includes: driving the core extraction cylinder 3 to move downward and rotate, and using the rotation and downward movement to perform positioning and core extraction operations, ensuring that the core extraction process is stable and efficient.

[0061] When measuring and analyzing data from the extracted soil core, the compaction degree and moisture content of the extracted soil core can be measured, the data can be analyzed, and a compaction quality report can be generated to provide a basis for construction.

[0062] The complete usage steps and working principle of the above embodiments are as follows:

[0063] The following is the working process of the pre-cleaning and leveling mechanism 4:

[0064] During the measurement of earthwork backfill compaction, the operator can first place the device at the measurement location, positioning the core sampler 3 directly above the measurement location. Then, by controlling the cylinder 2, the push plate 401 fixed at its output end is moved downwards. Simultaneously, if... Figure 1 and Figure 2 As shown, since two push rods 402 are symmetrically fixedly arranged at the bottom of the push plate 401, and a moving plate 403 is fixedly arranged at the bottom of each push rod 402, when the push plate 401 moves downward, the moving plate 403 can be pushed downward synchronously through the connection of the push rods 402. Since sliders 415 are fixedly arranged at the ends of the two moving plates 403 that are far apart from each other, and grooves 416 adapted to slide and connect with the sliders 415 are opened on the inner walls of both sides of the base frame 1, as the moving plate 403 moves downward, the sliders 415 will slide downward synchronously within the grooves 416 to cooperate with the downward movement of the moving plate 403, making the movement of the moving plate 403 more stable. At the ends of the two moving plates 403 that are close to each other, a moving frame 406 is fixedly arranged, and a pair of first connecting shafts 407 are symmetrically fixedly arranged on both sides of the moving frame 406. When the moving plate 403 moves downward, the moving frame 406 and the first connecting shafts 407 connected to it move downward synchronously. Figure 2 and Figure 4 As shown, a connecting plate 408 is rotatably mounted on the outer surface of the first connecting shaft 407. A second connecting shaft 409 is rotatably mounted on the end of the connecting plate 408 away from the first connecting shaft 407. The second connecting shaft 409 is fixedly mounted on the base plate 411 via a driven plate 410. Therefore, when the moving frame 406 moves downward, the driven plate 410 and the base plate 411 can be pushed outward synchronously through the linkage of the first connecting shaft 407, the connecting plate 408, and the second connecting shaft 409. This allows the two base plates 411, which are initially in a closed contact state, to move away from each other, thereby increasing the distance between the two base plates 411. Figure 4 As shown, since both base plates 411 are fixedly equipped with support strips 413 and scrapers 414 at their bottoms, before the cylinder 2 runs, the support strips 413 can fit against the ground surface to support the base plates 411, keeping the base plates 411 at a distance from the ground surface. This prevents the base plates 411 from directly contacting the ground in the initial state, thereby reducing wear or damage to the base plates 411 due to long-term contact with the ground. At the same time, the design of the support strips 413 can also effectively distribute the weight of the base plates 411, reducing the direct pressure of the base plates 411 on the ground surface and preventing the ground surface from being over-compacted or damaged due to the weight of the base plates 411, thereby improving the accuracy of subsequent compaction measurements. The lower end of the scraper 414 is embedded in the ground. When the cylinder 2 is turned on and the two base plates 411 move in opposite directions, the scraper 414 can scrape off the surface soil of the ground.

[0065] In the above process, through the setting of the pre-cleaning and leveling mechanism 4, and by utilizing the design of the push plate 401, the moving frame 406, the connecting plate 408, the base plate 411, and the scraper 414, during the measurement of earthwork backfill compaction, the two base plates 411 can be driven to move in opposite directions, and the two scrapers 414 can be used to pre-clean the soil surface, removing debris, loose soil layers, and uneven parts from the soil surface, making the soil surface smoother. This ensures that the soil at the measurement location is smoother and that the degree of soil surface cleaning is consistent before each core sampling, reducing measurement errors caused by incomplete cleaning or improper cleaning methods.

[0066] The following is the working process of the auxiliary core sampling mechanism 5:

[0067] During the process of cylinder 2 driving push plate 401 to move downward, such as Figure 1 , Figure 5 as well as Figure 6 As shown, two sleeve plates 501 are symmetrically fixed to the inner top wall of the base frame 1, and a U-shaped plate 502 is vertically slidably arranged between the two sleeve plates 501. A pair of return springs 503 are symmetrically fixed between the inner top wall of the sleeve plate 501 and the top of the U-shaped plate 502. The U-shaped plate 502 is located below the push plate 401. When the push plate 401 moves downward, it can not only drive the two bottom plates 411 to move in opposite directions, but also make the lower surface of the push plate 401 contact the inner bottom wall of the U-shaped plate 502. The downward force of the push plate 401 pushes the U-shaped plate 502 to slide vertically downwards synchronously between the two sleeve plates 501. At this time, the return spring 503 is also stretched synchronously. Because a connecting post 504 is fixedly installed at the bottom of the U-shaped plate 502, and a fixing cylinder 505 is fixedly installed at the bottom of the connecting post 504, when the U-shaped plate 502 is pushed downwards by the push plate 401, the connecting post 504, in conjunction with the fixing cylinder 505, allows the connecting post 504 to move downwards synchronously. Figure 2 and Figure 3 As shown, an arc-shaped sliding plate 404 is fixedly installed at the ends of the two movable plates 403 that are close to each other, and the arc-shaped sliding plate 404 is in contact with the outer surface of the fixed cylinder 505. A vertical groove 405 is opened on the arc surface of the arc-shaped sliding plate 404 on the side that is close to each other, such as... Figure 7 As shown, vertical bars 506 that are adapted to and slidably connected to the vertical grooves 405 are symmetrically fixed on the outer surfaces of both sides of the fixed cylinder 505. Therefore, when the push plate 401 pushes the moving plate 403 downward through the push rod 402, the arc-shaped sliding plate 404 will move downward synchronously. Through the sliding cooperation between the vertical bars 506 on the fixed cylinder 505 and the vertical grooves 405 on the arc-shaped sliding plate 404, the vertical sliding process of the arc-shaped sliding plate 404 against the outer surface of the fixed cylinder 505 can be made more stable.

[0068] refer to Figure 5, Figure 6 as well as Figure 7 As shown, a fixing plate 510 is fixedly installed on the rear side of the base frame 1, and a fixing post 511 is fixedly installed at the bottom of the fixing plate 510. An ear plate 509 is fixedly installed on the outer rear side of the fixing cylinder 505, and the ear plate 509 is slidably connected to the fixing post 511. When the push plate 401 pushes the U-shaped plate 502 to move downward, the fixing cylinder 505 can move synchronously with the ear plate 509 installed on it and slide downward on the outer surface of the fixing post 511. Furthermore, the bottom of the ear plate 509 is rotatably fitted onto the outer surface of the fixing post 511. The spiral sleeve 514 has a spiral groove 512 on the lower outer surface of the fixing post 511 that matches the inner surface of the spiral sleeve 514. When the ear plate 509 moves down synchronously with the fixing cylinder 505, the spiral groove 512 on the fixing post 511 drives the spiral sleeve 514 to rotate downward on the outer surface of the fixing post 511. At this time, the top of the spiral sleeve 514 will rotate at the bottom of the ear plate 509. Since a drive gear 515 is fixedly installed on the lower outer surface of the spiral sleeve 514, As the spiral sleeve 514 rotates downwards, the position of the driving gear 515 changes synchronously. The driving gear 515 also rotates synchronously due to the rotation of the spiral sleeve 514. Simultaneously, because the bottom of the fixed cylinder 505 is rotatably equipped with a linkage shaft 507, and the outer surface of the linkage shaft 507 is fixedly equipped with a driven gear 508, as the fixed cylinder 505 moves downwards, the driven gear 508 mounted on it can be driven to move downwards synchronously through the linkage shaft 507. Furthermore, because... Driven gear 508 meshes with driving gear 515. Therefore, as driving gear 515 moves downward and rotates with spiral sleeve 514, the synchronous downward movement of driven gear 508, along with the rotational connection between linkage shaft 507 and fixed cylinder 505, allows driving gear 515 to rotate and drive driven gear 508 to rotate synchronously around linkage shaft 507 below fixed cylinder 505. Simultaneously, as linkage shaft 507 rotates synchronously with driven gear 508 at the bottom of fixed cylinder 505, [further details can be found in the original text]. Figure 8Because the bottom of the linkage shaft 507 has a mounting groove 517, and the top of the core-taking cylinder 3 is fixedly equipped with a clamping plate 518, which is installed in the mounting groove 517, when the linkage shaft 507 rotates, the connection between the clamping plate 518 and the mounting groove 517 can synchronously drive the core-taking cylinder 3 to rotate below the fixed cylinder 505 in sync with the rotation of the linkage shaft 507. At the same time, affected by the downward movement of the fixed cylinder 505, the core-taking cylinder 3 will move downward in sync with the downward movement of the fixed cylinder 505. Combined with the meshing design between the driving gear 515 and the driven gear 508, this allows... The core sampling cylinder 3 moves downward while rotating simultaneously to achieve the effect of rotating downward, which facilitates the core sampling operation of the soil at the measurement site. At the same time, the rotation also ensures that the core sampling cylinder 3 cuts the soil evenly during the core sampling process, avoiding uneven sampling caused by direct insertion of the core sampling cylinder 3. This improves the accuracy and reliability of the measurement results and reduces the force of the core sampling cylinder 3 directly impacting the soil surface, making the force on the core sampling cylinder 3 more even during the core sampling process. This avoids wear of the core sampling cylinder 3 caused by direct impact, thereby extending the service life of the core sampling cylinder 3 and reducing the maintenance cost of the equipment.

[0069] Among them, such as Figure 1 , Figure 5 as well as Figure 7 As shown, a cover plate 516 is fixedly installed at the bottom of the fixed cylinder 505. The driven gear 508 and the driving gear 515 are both installed inside the cover plate 516. The linkage shaft 507 and the spiral sleeve 514 are rotatably connected to the cover plate 516. In the subsequent core extraction process, the blocking design of the cover plate 516 can prevent dust flying during the cleaning of the soil surface from adhering to the surface of the driving gear 515 and the driven gear 508, thus avoiding interference with the meshing between the driving gear 515 and the driven gear 508.

[0070] Reference Figure 8 As shown, the lower end of the linkage shaft 507 is symmetrically threaded with threaded rods 520, and the two threaded rods 520 extend into the mounting groove 517 with one end close to each other. The two threaded rods 520 are rotatably connected with positioning plates 519 that are slidably connected to the inner wall of the mounting groove 517. The positioning plates 519 are located on both sides of the clamping plate 518 and are in contact with the outer walls of both sides of the clamping plate 518. By utilizing the design of the threaded rods 520, positioning plates 519 and clamping plate 518, the two positioning plates 519 can be in contact with the outer walls of both sides of the clamping plate 518, thereby providing stable support for the core sampling cylinder 3, ensuring that the core sampling cylinder 3 remains stable during the core sampling process, avoiding shaking or loosening of the core sampling cylinder 3, thereby reducing sampling failures caused by shaking or loosening of the core sampling cylinder 3, avoiding the need for repeated sampling, and further improving work efficiency.

[0071] After the core sampling operation is completed and the core cylinder 3 is moved upward from the soil by the cylinder 2, the operator can rotate the threaded rod 520 to make the two threaded rods 520 move in opposite directions (i.e., outward) at the lower end of the linkage shaft 507. At this time, affected by the movement of the threaded rod 520, the two positioning plates 519 can slide in opposite directions synchronously on the inner wall of the mounting groove 517 and separate from the clamping plate 518, thereby releasing the positioning and clamping of the clamping plate 518. Then, the core cylinder 3 can be pushed from its rear to its front side to slide the clamping plate 518 out of the mounting groove 517, so as to facilitate the removal of the core cylinder 3 from the device for subsequent compaction measurement operations.

[0072] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A core sampling device for measuring earthwork backfill compaction, characterized in that, It includes a base frame (1), a pre-cleaning and leveling mechanism (4) and an auxiliary core-taking mechanism (5). A cylinder (2) is fixedly connected to the top of the base frame (1), and a core-taking cylinder (3) is provided below the output end of the cylinder (2). The pre-cleaning and leveling mechanism (4) includes a push plate (401), a moving frame (406), a connecting plate (408), a base plate (411), and a scraper (414). The push plate (401) is fixedly connected to the output end of the cylinder (2). Two moving frames (406) are symmetrically arranged below the push plate (401). Two base plates (411) are symmetrically arranged below the core tube (3). The connecting plate (408) is arranged between the moving frame (406) and the base plate (411). Two scrapers (414) are fixedly connected to the bottom of the two base plates (411) at their close ends. The auxiliary core-taking mechanism (5) includes a fixed cylinder (505), a driven gear (508), a spiral sleeve (514), and a driving gear (515). The fixed cylinder (505) is located above the core-taking cylinder (3). The driven gear (508) is located between the fixed cylinder (505) and the core-taking cylinder (3). The spiral sleeve (514) is located behind the fixed cylinder (505). The driving gear (515) is fixedly connected to the outer surface of the lower end of the spiral sleeve (514). The auxiliary core-taking mechanism (5) further includes a pair of sleeve plates (501) symmetrically fixedly connected to the inner top wall of the base frame (1). A U-shaped plate (502) is slidably connected between the pair of sleeve plates (501). The U-shaped plate (502) is located below the push plate (401). A pair of return springs (503) are symmetrically fixedly connected between the top of the U-shaped plate (502) and the inner top wall of the sleeve plate (501). A connecting column (504) is fixedly connected to the bottom of the U-shaped plate (502). The bottom of the connecting column (504) is fixedly connected to the top of the fixed cylinder (505). A vertical strip (506) is fixedly connected to the outer surface of the fixed cylinder (505). A fixing plate (510) is fixedly connected to the middle of the upper rear side of the base frame (1). A fixing column (511) is fixedly connected to the bottom of the fixing plate (510). A baffle (513) is fixedly connected to the bottom of the fixing column (511). An ear plate (509) is fixedly connected to the outer rear side of the fixing cylinder (505). The fixing column (511) and the ear plate (509) are slidably connected through each other. A spiral groove (512) is opened on the outer lower end of the fixing column (511). A spiral sleeve (514) is rotatably connected to the bottom of the ear plate (509). The spiral sleeve (514) is movably connected to the outer lower end of the fixing column (511) through the spiral groove (512). A linkage shaft (507) is rotatably connected to the bottom of the fixing cylinder (505). The driven gear (508) is fixedly connected to the outer surface of the linkage shaft (507). The driven gear (508) is meshed with the driving gear (515).

2. The core sampling device for measuring earthwork backfill compaction according to claim 1, characterized in that, The pre-cleaning and leveling mechanism (4) also includes two push rods (402) symmetrically fixedly connected to the bottom of the push plate (401). The bottom of the push rod (402) is fixedly connected to a moving plate (403). The two moving plates (403) are fixedly connected to sliders (415) at their opposite ends. The inner walls of both sides of the base frame (1) are symmetrically opened with two sliding grooves (416). The sliders (415) are slidably connected in the sliding grooves (416).

3. A core sampling device for measuring earthwork backfill compaction according to claim 2, characterized in that, Both movable plates (403) are fixedly connected to an arc-shaped sliding plate (404) at their close ends, and the arc-shaped sliding plate (404) is in contact with the outer surface of the fixed cylinder (505). The arc-shaped sliding plate (404) has a vertical groove (405) on the side facing the fixed cylinder (505). The movable frame (406) is vertically fixedly connected to the movable plate (403). A pair of first connecting shafts (407) are symmetrically fixedly connected to both sides of the movable frame (406). A pair of driven plates (410) are symmetrically fixedly connected to both sides of the two base plates (411) at their far ends. A second connecting shaft (409) is fixedly connected to the end of the driven plate (410) away from the base plate (411). The connecting plate (408) is rotatably connected between the second connecting shaft (409) and the first connecting shaft (407).

4. A core sampling device for measuring earthwork backfill compaction according to claim 3, characterized in that, A pair of limiting rods (412) are symmetrically fixedly connected to the middle of the two base plates (411) at their opposite ends, and the limiting rods (412) are slidably connected to the lower end of the base frame (1). A support strip (413) is fixedly connected to the bottom of the two base plates (411).

5. A core sampling device for measuring earthwork backfill compaction according to claim 1, characterized in that, The bottom of the fixed cylinder (505) is fixedly connected to a cover plate (516). The driven gear (508) and the driving gear (515) are both located inside the cover plate (516). The linkage shaft (507) and the spiral sleeve (514) are both rotatably connected through the cover plate (516).

6. A core sampling device for measuring earthwork backfill compaction according to claim 5, characterized in that, The linkage shaft (507) has an installation groove (517) at its bottom. The core tube (3) is fixedly connected to a clamping plate (518) at its top. The clamping plate (518) is located in the installation groove (517). The lower end of the linkage shaft (507) is symmetrically threaded with a pair of threaded rods (520). The pair of threaded rods (520) are rotatably connected to a positioning plate (519) at one end close to each other. The positioning plate (519) is slidably connected in the installation groove (517). The clamping plate (518) is located between the pair of positioning plates (519) and the positioning plate (519) is used to position the clamping plate (518).

7. A core sampling method for measuring earthwork backfill compaction, using a core sampling device for measuring earthwork backfill compaction as described in any one of claims 1-6, characterized in that, The aforementioned core sampling method for measuring earthwork backfill compaction includes: Step 1: The land surface is pre-treated and leveled by a pre-cleaning and leveling mechanism (4); Step 2: Positioning and core extraction are performed using the core extraction tube (3).

8. A core sampling method for measuring earthwork backfill compaction according to claim 7, characterized in that, Step one includes: starting the device to make the two scrapers (414) move in opposite directions and scrape away debris and loose soil from the land surface, and level the land; Step two includes: driving the core-retrieving cylinder (3) to move downward and rotate, and performing positioning and core-retrieving operations by rotating and moving downward.

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