Cutting ring sampling device for compactness detection and construction method thereof

Abstract

The invention provides a cutting ring sampling device for compactness detection and a construction method thereof. The cutting ring sampling device comprises a cutting ring sampling device body and a cutting ring main body, wherein the cutting ring main body is provided with a cutting soil sample and a cavity for accommodating the soil sample; the press-in device is connected with the cutting ring main body and is used for applying an acting force to the cutting ring main body, and the acting force enables the cutting ring main body to be pressed into a to-be-tested soil body; and the fixing device is matched with the cutting ring sampling device or the press-in device and is used for fixing the cutting ring sampling device above the soil body to be detected. The problems that other existing cutting ring sampling devices are too heavy and consume long time are solved, and the effects of rapidness and convenience are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical testing, and specifically relates to a core cutter sampling device for compactness detection and its construction method. Background Art

[0002] In the construction quality inspection of road engineering, dike engineering, etc., compactness is an important index to evaluate the density of subgrade materials. The traditional core cutter sampling method has the following technical defects: 1) It is difficult to ensure the verticality when manually pressing the core cutter, which easily causes excessive extrusion of the sampled material; 2) The bottom cutting is incomplete and requires secondary trimming; 3) It is impossible to observe the sampling filling state in real time; 4) The equipment is bulky, resulting in low operation efficiency. Most existing improvement schemes adopt a hydraulic drive system, but there are still problems such as complex equipment and poor adaptability. Summary of the Invention

[0003] The purpose of the present invention is to provide a core cutter sampling device for compactness detection and its construction method for the deficiencies of the prior art.

[0004] The specific technical solutions are as follows: A core cutter sampling device for compactness detection, comprising: A core cutter sampling device, the lower end of which has a core cutter body for cutting soil samples and a cavity for accommodating soil samples; A pressing device, which is connected to the core cutter body and is used to apply a force to the core cutter body to press it into the soil to be tested; and A fixing device, which is cooperatively arranged with the core cutter sampling device or the pressing device and is used to fix the core cutter sampling device above the soil to be tested.

[0005] Optionally, the fixing device includes a main body fixing ring, a connecting rod, a connecting fixing ring and a connecting fixing pile; the main body fixing ring is two symmetrically arranged annular structures, on which four connecting fixing rings are evenly distributed; one of the main body fixing rings is fixedly connected to the pressing device through two symmetrically distributed connecting rods, and the other main body fixing ring is fixed to the ground through the connecting fixing pile.

[0006] Optionally, the connecting fixing pile includes a rotating sleeve head and a fixing screw pile. The rotating sleeve head is provided with a spiral structure inside, and is connected to the fixing screw pile through a fixing bolt and the length is adjusted; the rotating sleeve head passes through the connecting fixing ring and drills into the ground, and is fixed to the connecting fixing ring through a bolt, and the position of the fixing bolt is above the connecting fixing ring.

[0007] Optionally, the pressing device includes a hand-operated jack and a detachable hand crank. The bottom of the hand-operated jack is provided with a spiral connecting rod, which is connected to the core cutter sampling device through a fixing bolt.

[0008] Optionally, the core cutter body includes a core cutter barrel and a circumferential cutting barrel; a plurality of evenly distributed core cutters are arranged in the core cutter barrel, a circumferential cutting blade and a circular cutter are arranged at the bottom of the circumferential cutting barrel, the circumferential cutting blade is fixedly connected to a rotating ring through a sliding rod, a moving groove for the bottom end of the sliding rod to slide is formed in the circular barrel bottom plate of the circumferential cutting barrel, and a groove corresponding to the moving groove is arranged on the rotating ring; the control rods are symmetrically distributed, and the circumferential cutting blade is driven to cut the sampling object by translating to control the sliding rod.

[0009] Optionally, an observation hole and symmetrically distributed object taking buttons are arranged on the top plate. When the object taking buttons are pressed, the top plate presses down to push out the core cutter and the sampling object.

[0010] Optionally, an arc-shaped magnetic strip is arranged between the core cutter barrel and the circumferential cutting barrel. The position of the arc-shaped magnetic strip corresponds to that of the core cutter, and is used for adsorbing and fixing the core cutter and the top plate.

[0011] Optionally, the hand-operated jack is connected to the core cutter sampling device through a spiral sliding rod, and secondary fixation is achieved through a fixing bolt; a limiting plate is arranged at the tail of the circumferential cutting blade to prevent it from falling off from the bottom of the circumferential cutting barrel.

[0012] Optionally, the circular cutter is narrow at the top and wide at the bottom, which is convenient for the insertion of the sampling device.

[0013] A construction method for compaction degree detection using the above-mentioned core cutter sampling device includes the following steps: Step 1: After determining the sampling position, fix the fixed screw pile and the rotating socket head, tighten the bolts, then pass them through the connecting fixed ring, and drill them into the ground for fixation by using the fixed screw pile. Adjust the length of the connecting fixed pile and the relative position between the connecting fixed pile and the connecting fixed ring to fix the whole device, and adjust the device to be perpendicular to the ground. Step 2: Install the core cutter blade in the core cutter barrel, and ensure that it does not fall off during operation through the arc-shaped magnetic strip placed between the core cutter barrel and the circumferential cutting barrel. Uniformly apply lubricating oil on the core cutter blade, then connect the core cutter sampling device to the hand-operated jack, and tighten the fixing bolt. Step 3: Open the core cutter sampling device, shake the hand-operated jack to lower the core cutter barrel, cut and sample the sampling object. Stop when it is observed through the observation hole above the core cutter barrel that the sampling object fills the core cutter barrel. Move the control rod to cut the sampling object by the core cutter sampling device and seal the core cutter barrel. Step 4: Take out the sampling device through the hand-operated jack, remove the sampling device, move the control rod again to open the circumferential cutting blade, press the object taking button to push out a part of the core cutter blade and the sampling object from the sampling device, and then take them out of the sampling device to complete the sampling.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The present invention solves the problems that if the sampling area of a traditional core cutter is not horizontally processed or the horizontal processing is not in place, a large amount of manpower is consumed to press the core cutter into the sampling object, which will cause excessive extrusion of the sampling object in the core cutter, making it difficult to take out and resulting in inaccurate compactness of the sampling object. Furthermore, the effects of ensuring the compactness of the sampling object and the sample quality and saving manpower are achieved. Through the core cutter sampling device, when sampling with a traditional core cutter, the bottom of the sampling object in the core cutter is uneven, and there is no need to cut it again. Furthermore, the effects of ensuring the integrity and quality of the sampling object and saving the time for sampling and sample preparation are achieved. Through the observation hole, when sampling with a traditional core cutter, it is impossible to timely observe whether the sampling object in the core cutter has filled the core cutter, which may cause excessive extrusion of the compactness of the sampling object. Furthermore, the effect of ensuring the compactness of the sampling object is achieved. Through the overall device, the problems of other existing core cutter sampling devices being too bulky and time-consuming are solved. Furthermore, the effects of being fast and convenient are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the structure of the hand-operated jack and fixed ring device of the present application; Figure 3 is a schematic diagram of the structure of the main body fixed ring device of the present application; Figure 4 is a schematic diagram of the structure of the hand crank of the present application; Figure 5 is a schematic diagram of the stretched hand crank of the present application; Figure 6 is a schematic diagram of the structure of the connecting fixing pile of the present application; Figure 7 is a schematic diagram of the structure of the sampling device of the present application; Figure 8 is a schematic diagram of the structure of the core cutter barrel of the present application; Figure 9 is a schematic diagram of the structural position of the device for taking out the core cutter and the sampling object of the present application; Figure 10 is a schematic diagram of the core cutter of the present application; Figure 11 is a schematic diagram of the circumferential cutting blade of the present application; Figure 12 is a schematic diagram of the upward view of the circular cutting structure of the present application; Figure 13 is a schematic diagram of the structure of the circumferential cutting barrel when the circumferential cutting blades are not closed; Figure 14 is a schematic diagram of the structure of the circumferential cutting barrel when the circumferential cutting blades are closed; Figure 15Schematic diagram of the position structure of the circular cutting and core sampler device of the present application; Figure 16 Schematic diagram of the structural position of the sampling device when the core sampler and the sampled material extraction device of the present application are enabled; Figure 17 Schematic diagram of the structural position of the sampling device when the core sampler and the sampled material extraction device of the present application are enabled; Figure 18 Schematic diagram of the respective moving directions of the devices in the core sampler device of the present application during the closing and opening processes.

[0016] In the figure: 1. Fixing device; 11. Main body fixing ring; 12. Connecting rod; 13. Connecting fixing ring; 14. Connecting fixing pile; 141. Rotating socket; 142. Fixing screw pile; 143. Fixing bolt; 15. Bolt; 2. Pressing device; 21. Hand-operated jack; 22. Hand crank; 3. Core sampler device; 31. Core barrel; 311. Core cutter; 312. Cylindrical barrel; 313. Observation hole; 314. Sampling button; 315. Top plate; 32. Circular cutting barrel; 321. Circular cutting blade; 322. Cylindrical barrel; 3221. Moving groove; 323. Sliding rod; 324. Rotating ring; 325. Control rod; 326. Circular cutting; 327. Arc magnetic strip. Detailed implementation mode

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0018] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0019] Next, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present invention.

[0020] A core sampler device for compaction degree detection provided in the present invention, referring to Figures 1 - 18 , includes: A core sampler device 3, the lower end of which has a core cutter body for cutting soil samples and a cavity for accommodating soil samples; A pressing device 2, the pressing device 2 is connected to the core cutter body and is used to apply a force to the core cutter body to press it into the soil to be measured; and A fixing device 1, which is arranged in cooperation with the core sampler device 3 or the pressing device 2 and is used to fix the core sampler device 3 above the soil to be measured.

[0021] Specifically, the device of the present invention is specifically used for detecting the compactness of soil. Among them, the core cutter sampling device 3 is used to cut soil samples, and a cavity is designed inside the core cutter body, which is used to accommodate the soil samples taken from the soil for subsequent analysis and testing. The main function of the pressing device 2 is to apply pressure to the core cutter body to ensure that the core cutter body can be effectively pressed into the soil to be detected. In this way, it can be ensured that the samples taken from the soil are representative and can accurately reflect the actual compaction situation of the soil. The fixing device 1 is used in cooperation with the core cutter sampling device 3 or the pressing device 2 to keep the core cutter sampling device 3 stable during the sampling process. Through the fixing device 1, it can be ensured that the core cutter sampling device 3 is firmly fixed above the soil to be detected, so that the core cutter sampling device 3 will not be displaced during the sampling process by applying pressure, ensuring the accuracy and reliability of the sampling process.

[0022] Refer to Figures 1 - 6, The main function of the fixing device 1 is to stably fix a specific device or structure, ensuring its stability during use without displacement or tilting. It includes a main fixing ring 11, a connecting rod 12, a connecting fixing ring 13, and a connecting fixing pile 14; the main fixing ring 11 is the core part of the device, consisting of two symmetrically arranged annular structures, which can be circular, elliptical, or any other suitable closed shape to adapt to the fixing requirements of different devices. Four connecting fixing rings 13 are evenly distributed on the outer edge of each main fixing ring 11. The connecting fixing ring 13 can be a threaded hole, a clamping groove, or other forms of connecting structures for fixed connection with the connecting rod 12 or the connecting fixing pile 14; one of the main fixing rings 11 is fixedly connected to the pressing device 2 through two symmetrically distributed connecting rods 12. The connecting rod 12 can be a metal rod, a tube, or other strong rod-shaped structures, and its length and diameter are determined according to actual application requirements. The two ends of the connecting rod 12 are respectively connected to the main fixing ring 11 and the pressing device 2 to ensure that the pressing device 2 does not move during operation; the other main fixing ring 11 is fixed to the ground through the connecting fixing pile 14. The connecting fixing pile 14 can be a bolt, an anchor rod, or other forms of fixing piles. One end of it is connected to the main fixing ring 11, and the other end is fixed to the ground. In actual application, first connect the two main fixing rings 11 to the connecting rod 12 and the connecting fixing pile 14 respectively. Then, connect the main fixing ring 11 with the connecting rod 12 to the pressing device 2 to ensure a firm connection. Finally, fix the main fixing ring 11 with the connecting fixing pile 14 to the ground. In this way, the entire fixing device 1 can effectively fix the pressing device 2 to the ground, ensuring its stability and safety during use. In summary, through the reasonable design and layout of the main fixing ring 11, the connecting rod 12, the connecting fixing ring 13, and the connecting fixing pile 14, the fixing device 1 of this solution realizes the effective fixing of the pressing device 2, and has the advantages of simple structure, convenient operation, and strong stability.

[0023] Refer to Figures 1 - 6, the connecting and fixing pile 14 includes a rotating sleeve 141 and a fixing screw pile 142. The rotating sleeve 141 is a hollow cylindrical structure with a spiral thread structure on its inner wall. The upper end of the rotating sleeve 141 is designed with a threaded hole for installing a fixing bolt 143. The fixing screw pile 142 is a metal pile with a spiral tip for inserting into the ground to provide stable support. The upper end of the fixing screw pile 142 is also designed with a threaded structure matching the rotating sleeve 141, and is connected and the length is adjusted through the fixing bolt 143; the connecting and fixing ring 13 is an annular structure, usually made of metal material, for fixing the rotating sleeve 141 and providing additional stability. The inner diameter of the connecting and fixing ring 13 is slightly larger than the outer diameter of the rotating sleeve so that the rotating sleeve 141 can pass through. After the rotating sleeve 141 passes through the connecting and fixing ring 13, it drills into the ground and is fixed to the connecting and fixing ring 13 through a bolt 15. The position of the fixing bolt 15 is above the connecting and fixing ring 13. The spiral structure between the rotating sleeve 141 and the fixing screw pile 142 allows the length between the two to be adjusted by rotation, realizing precise control of the overall structure height. The self-locking characteristic of the spiral structure ensures that after being adjusted to the required length, the structure can remain stable and will not loosen by itself due to external forces. Fixing the rotating sleeve 141 to the connecting and fixing ring 13 through the bolt 15 ensures that the rotating sleeve 141 will not displace during rotation, thus guaranteeing the stability of the entire structure. This structure is double-fixed by the spiral structure and the fixing bolt 15, ensuring stability under various environmental conditions, suitable for various ground conditions. The design of the rotating sleeve 141 enables easy adjustment of the structure height according to actual needs, with good adaptability. The assembly process of the entire structure is simple and fast, without the need for complex tools or techniques, facilitating rapid on-site installation. Compared with other fixing methods, the structure of this solution is simple, with low cost, and is easy to maintain and replace.

[0024] Refer to Figure 2 , Figure 4 and Figure 5, the pressing device 2 includes a manual jack 21 and a manually operated lever 22 detachably connected thereto. The bottom of the manual jack 21 is provided with a spiral connecting rod, which is connected to the core cutter sampling device 3 through a fixing bolt 15. The manual jack 21 generally includes a screw rod. When the manually operated lever 22 rotates, it drives the screw rod to rotate. The screw rod cooperates with the nut inside the jack, so that the screw rod moves axially while rotating. Due to the thread design of the screw rod, even a very small rotation angle can generate a large axial displacement, thereby realizing the lifting or extrusion of the load. The manually operated lever 22 is the driving component of the manual jack 21. By rotating the manually operated lever 22 manually, a torque can be easily applied to the screw rod, and then sufficient force can be generated to lift or extrude heavy objects. The length of the manually operated lever 22 is set to be long and adjustable, so that a larger lever arm can be provided, enabling the operator to complete larger work with less force. The spiral connecting rod is located at the bottom of the manual jack 21 and connects the jack to the core cutter sampling device 3. The spiral connecting rod is connected to the core cutter sampling device 3 through a fixing bolt 15, ensuring the stable combination of the jack and the core cutter sampling device 3 during operation and guaranteeing the accuracy and stability of the applied force. In terms of the implementation effect, this pressing device 2 can provide a stable and controllable force output, which is suitable for occasions where precise pressure control is required. The manual design makes the device easy to operate and does not require an external power source, facilitating its use in the field or in an environment without power. In addition, due to its simple structure, it has low maintenance costs and high reliability.

[0025] Refer to Figures 7 - 12 , the core cutter body includes a core cutter barrel 31 and a cutting ring barrel 32; a plurality of evenly distributed core cutters 311 are arranged inside the core cutter barrel 31. The core cutters 311 are provided to effectively cut the sampling object. The bottom of the cutting ring barrel 32 is provided with a cutting ring blade 321 and a circular cutter 326. The cutting ring blade 321 is fixedly connected to the rotating ring 324 on the cutting ring barrel 32 through a sliding rod 323, ensuring the stable movement of the blade. A moving groove 3221 for the bottom end of the sliding rod 323 to slide is provided on the bottom plate of the circular barrel 312 of the cutting ring barrel 32, enabling the blade to perform a flexible cutting action. A groove corresponding to the position of the moving groove 3221 for the top end of the sliding rod 323 to slide is also provided on the rotating ring 324 (such as Figures 13 - 14As shown, the moving groove 3221 and the groove are both inclined grooves with the same position and shape. The position of the circular cutting blade 321 is controlled by the sliding of the sliding rod 323 to achieve the cutting and sampling of the soil sample. The control rods 325 are symmetrically distributed. By translating to control the sliding rod 323, the circular cutting blade 321 is driven to cut the sampling object. When the control rod 325 rotates forward, the sliding rod 323 moves accordingly, and then drives the circular cutting blade 321 to cut. This design not only improves the cutting accuracy but also ensures the stability of the sampling process. When the control rod 325 rotates backward, it can return to the original state to prepare for the next sampling. The ring knife sampling device 3 realizes the efficient and precise cutting of the sampling object. The multiple ring knives 311 in the ring knife barrel 31 and the circular cutting blades 321 at the bottom of the circular cutting barrel 32 cooperate together to ensure the smooth progress of the sampling process. In addition, the design of driving the circular cutting blade 321 to cut by translating the control rod 325 enables the operator to easily control the cutting depth and width, thus meeting different sampling requirements. This device performs excellently in the sampling process of geological samples such as soil and rock, greatly improving the sampling efficiency and accuracy.

[0026] Referring to Figure 9 , a top plate 315 is provided at the top of the ring knife barrel 31. An observation hole 313 and symmetrically distributed object-taking buttons 314 are provided on the top plate 315. When the object-taking button 314 is pressed, the top plate 315 is pressed down to push out the ring knife 311 and the sampling object. The barrel body is cylindrical. The top plate 315 is filled on the ring knife barrel 31 and maintains a certain small gap with the inner wall of the barrel. The observation hole 313 is used to observe the state of the sampling object in the barrel. Two object-taking buttons 314 are symmetrically distributed at the top edge of the barrel body. The lower part of the object-taking button 314 is connected to the top plate 315 to ensure that the top plate 315 can be pressed down smoothly to sample. The ring knife body is installed below the top plate 315. When the top plate 315 is pressed down, the ring knife body will move accordingly to push out the ring knife 311 and the sampling object. During the process of the top plate 315 being pressed down, it pushes the ring knife body to move downward. The ring knife 311 cuts into the sampling object, and the sampling object is wrapped by the ring knife 311. As the top plate 315 continues to be pressed down, the ring knife 311 and the sampling object are pushed out of the barrel body to complete the sampling operation. In the ring knife barrel 31 device of the present invention, the ring knife 311 and the sampling object can be pushed out by pressing the object-taking button 314. The operation is simple and fast, greatly improving the sampling efficiency. At the same time, the setting of the observation hole 313 enables the operator to directly observe the sampling object before sampling, ensuring the accuracy of sampling. In addition, the structure of the present invention is simple, easy to manufacture and maintain, and reduces the use cost. In practical applications, the ring knife barrel 31 device of the present invention can be widely applied to the sampling operations of geological materials such as soil and rock, and has broad market prospects and application value.

[0027] Referring to Figure 13, an arc-shaped magnetic strip 327 is provided between the core cutter barrel 31 and the circumferential cutting barrel 32. The position of the arc-shaped magnetic strip 327 corresponds to that of the core cutter 311, and it is used to adsorb and fix the core cutter 311 and the top plate 315. When the core cutter 311 is placed in the core cutter barrel 31, the magnetic force of the arc-shaped magnetic strip 327 can adsorb and fix the core cutter 311, keeping it stable and motionless, making the fixation of the core cutter 311 and the top plate 315 more stable, reducing the phenomenon of displacement or detachment of the core cutter 311 caused by improper operation, improving work efficiency and safety. However, when sampling is difficult, sampling can be very conveniently achieved by pressing the sampling button 314 on the top plate 315 or disassembling the core cutter 311.

[0028] The hand-operated jack 21 device is closely connected to the core cutter sampling device 3 through a spiral connecting rod, ensuring that the core cutter sampling device 3 can stably move up and down following the jack during operation. In addition, to ensure the firmness of the connection, fixing bolts 15 are used for secondary fixation, so that even in a high-pressure or high-strength working environment, the stability and safety of the device can be guaranteed. A limit plate is specially designed at the tail of the circumferential cutting blade 321, mainly to prevent the circumferential cutting blade 321 from accidentally falling off the bottom of the circumferential cutting barrel 32 during use, thus avoiding possible safety hazards. This scheme mainly generates a vertical thrust through the hand-operated jack 21, and this thrust is transmitted to the core cutter sampling device 3 through the spiral connecting rod, thereby driving the circumferential cutting blade 321 to perform circumferential cutting operations. At the same time, the secondary fixation function of the fixing bolts 15 can enhance the stability and load-bearing capacity of the entire device. The limit plate effectively prevents the circumferential cutting blade 321 from falling off, improving the safety of the operation. The connection between the hand-operated jack 21 and the core cutter sampling device 3 is more stable, can withstand greater working pressure, and improves the operation efficiency. At the same time, the fixing bolts 15 further enhance the stability of the device, reducing the safety hazards caused by loose connections. The design of the limit plate effectively avoids the falling off of the circumferential cutting blade 321, ensuring the safety of the operators. Generally speaking, the implementation of this scheme significantly improves the overall performance and safety of the hand-operated jack 21 and the core cutter sampling device 3.

[0029] The circular cutter 326 is narrow at the bottom and wide at the top. When the ring knife sampling device 3 is inserted into the substance to be sampled, it can more easily penetrate the surface, reduce resistance, and improve the insertion efficiency. At the same time, the wide-top design facilitates the ring knife sampling device 3 to maintain stability during the sampling process, preventing deviation or detachment due to external forces, and ensuring the accuracy and integrity of sampling. The sharp lower end can concentrate the force, making the force required for the ring knife sampling device 3 to insert smaller and easier to penetrate the surface of the substance to be sampled. The wider upper part provides a larger contact area, increasing the friction between the ring knife sampling device 3 and the substance to be sampled, thereby improving the stability during the sampling process. In addition, this design helps to reduce the damage to the surrounding tissues during the sampling process and improve the safety and reliability of sampling. Using the ring knife sampling device 3 of the present invention for sampling can significantly improve the sampling efficiency and accuracy. Due to the special design of the cutting surface, the ring knife sampling device 3 can more easily penetrate the substance to be sampled, reducing the time and force required for sampling. At the same time, the stability during the sampling process is enhanced, avoiding sampling failure caused by the deviation or detachment of the ring knife sampling device 3.

[0030] A construction method of a ring knife sampling device for compaction degree detection, referring to Figures 15 - 18 , includes the following steps: Step 1: After determining the sampling position, fix the fixed screw pile 142 and the rotating sleeve 141, tighten the bolt 15, then pass it through the connecting fixed ring 13, and drill it into the ground for fixation using the fixed screw pile 142. Adjust the length of the connecting fixed pile 14 and the relative position of the connecting fixed pile 14 and the connecting fixed ring 13 to fix the whole device and adjust the device to be perpendicular to the ground; Step 2: Install the ring knife 311 blade in the ring knife barrel 31. Ensure that it does not fall off during operation through the arc-shaped magnetic strip 327 placed between the ring knife barrel 31 and the circular cutting barrel 32. Apply lubricating oil evenly on the ring knife 311 blade, then connect the ring knife sampling device 3 with the hand-operated jack 21 and tighten the fixing bolt 15; Step 3: Open the ring knife sampling device 3, shake the hand-operated jack 21 to lower the ring knife barrel 31, cut and sample the sampling object. Stop when it is observed through the observation hole 313 above the ring knife barrel 31 that the sampling object fills the ring knife barrel 31. Move the control rod 325 to cut the sampling object with the ring knife sampling device 3 and make the ring knife barrel 31 airtight; Step 4: Take out the ring knife sampling device 3 through the hand-operated jack 21, remove the ring knife sampling device 3, move the control rod 325 again to open the circular cutting blade 321, press the object-taking button 314 to push out a part of the ring knife 311 blade and the sampling object from the ring knife sampling device 3, and then take them out of the ring knife sampling device 3 to complete the sampling.

[0031] The above are only the preferred embodiments of the present invention, and thus do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the solutions obtained by equivalent substitution and obvious changes made by using the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A core sampling device for compaction degree detection, characterized in that, Comprising: A core cutter sampling device, including a core cutter body at its lower end with a cavity for cutting soil samples and accommodating soil samples; A pressing device, which is connected to the core cutter body and is used to apply a force to the core cutter body to press it into the soil to be measured; And A fixing device, which is cooperatively arranged with the core cutter sampling device or the pressing device and is used to fix the core cutter sampling device above the soil to be measured.

2. The core cutter sampling device for compaction degree detection according to claim 1, wherein The fixing device includes a main body fixing ring, a connecting rod, a connecting fixing ring and a connecting fixing pile; the main body fixing ring is composed of two symmetrically arranged annular structures, on which four connecting fixing rings are evenly distributed; one of the main body fixing rings is fixedly connected to the pressing device through two symmetrically distributed connecting rods, and the other main body fixing ring is fixed to the ground through the connecting fixing pile.

3. The core cutter sampling device for compaction degree detection according to claim 2, wherein, The connecting fixing pile includes a rotating sleeve head and a fixing screw pile. The rotating sleeve head is provided with a spiral structure inside, and is connected to the fixing screw pile through a fixing bolt and the length can be adjusted; the rotating sleeve head passes through the connecting fixing ring and then drills into the ground, and is fixed to the connecting fixing ring through a bolt, and the position of the fixing bolt is above the connecting fixing ring.

4. The core cutter sampling device for compaction degree detection according to claim 1, wherein The pressing device includes a hand-operated jack and a detachably connected hand rocker. The bottom of the hand-operated jack is provided with a spiral connecting rod, which is connected to the core cutter sampling device through a fixing bolt.

5. The core cutter sampling device for compaction degree detection according to claim 1, characterized in that, The core cutter body includes a core cutter barrel and a cutting ring barrel; multiple evenly distributed core cutters are arranged inside the core cutter barrel. The bottom of the cutting ring barrel is provided with a cutting ring blade and a circular cutter. The cutting ring blade is fixedly connected to the rotating ring on the cutting ring barrel through a sliding rod. A moving groove for the bottom end of the sliding rod to slide is opened on the circular bottom plate of the cutting ring barrel, and a groove corresponding to the moving groove is arranged on the rotating ring; the control rods are symmetrically distributed, and the sliding rod is controlled to translate to drive the cutting ring blade to cut the sampling object.

6. The core cutter sampling device for compaction degree detection according to claim 5, characterized in that, An observation hole and symmetrically distributed object taking buttons are arranged on the top plate. When the object taking buttons are pressed, the top plate is pressed down to push out the core cutter and the sampling object.

7. The core cutter sampling device for compaction degree detection according to claim 6, characterized in that, An arc magnetic strip is arranged between the core cutter barrel and the cutting ring barrel. The position of the arc magnetic strip corresponds to the core cutter, and is used to adsorb and fix the core cutter and the top plate.

8. The core cutter sampling device for compaction degree detection according to claim 1, characterized in that, The hand-operated jack is connected to the core cutter sampling device through a spiral connecting rod and is secondarily fixed through a fixing bolt; a limiting plate is arranged at the tail of the cutting ring blade to prevent it from falling off the bottom of the cutting ring barrel.

9. The core cutter sampling device for compaction degree detection according to claim 1, wherein, The circular cutter is pointed at the bottom and wide at the top, which is convenient for the insertion of the sampling device.

10. A construction method for compaction degree detection using the core cutter sampling device according to any one of claims 1 to 9, characterized in that, Including the following steps: Step 1: After determining the sampling position, fix the fixing screw pile and the rotating sleeve head, tighten the bolts, then pass them through the connecting fixing ring, and use the fixing screw pile to drill them into the ground for fixing. Adjust the length of the connecting fixing pile and the relative position between the connecting fixing pile and the connecting fixing ring to make the whole device fixed, and adjust the device to be perpendicular to the ground; Step 2: Install the core cutter blade in the core cutter barrel, and ensure that it does not fall off during operation by the arc magnetic strip placed between the core cutter barrel and the cutting ring barrel. Apply lubricating oil evenly on the core cutter blade, then connect the core cutter sampling device to the hand-operated jack, and tighten the fixing bolt; Step 3: Open the core sampler, turn the hand-operated jack, lower the core barrel, cut and sample the sampled material. Stop when it is observed through the observation hole above the core barrel that the sampled material fills the core barrel. Move the control rod to cut the sampled material with the core sampler and seal the core barrel. Step 4: Remove the sampling device through the hand-operated jack, take off the sampling device, move the control rod again to open the cutting blade, press the material extraction button to push out a part of the core blade and the sampled material from the sampling device, and then take them out of the sampling device to complete the sampling.

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