A sampling device and usage method for geotechnical engineering investigation

Abstract

The present invention relates to the technical field of sampling devices, and discloses a sampling device and a usage method for geotechnical engineering investigation, including a sampling machine and a sampling pipe. The bottom of the sampling machine is detachably connected with the sampling pipe. A chute is provided on the side wall of the sampling machine, and a slider is slidably connected to the inner wall of the chute. One end of the slider away from the chute is fixedly installed with a storage device; in the present invention, the sampled soil sample is placed in the storage device. When the sampling machine starts to vibrate, since the slider is slidably connected in the chute, and there are multiple first springs at the upper and lower ends of the slider for buffering and increasing resistance, the slider and the storage device can reduce the amplitude of vibration, thereby playing a role in protecting the soil sample in the storage device, reducing the damage to the soil sample caused by vibration and the loss of water content, improving the integrity of the soil sample, and thus greatly improving the detection accuracy of the soil sample.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling devices, and particularly relates to a sampling device and a usage method for geotechnical engineering investigation. Background Art

[0002] A sampling device, also known as a soil sampler, refers to a tool for obtaining soil samples. Commonly used ones include soil drills, shovels, and spades. A soil drill consists of a drill bit made of hard material and a handle. The drill bit is often spiral or cylindrical. The top of the spiral drill bit is a pair of sharp blades that can rotate and cut into the soil. Immediately following the blades is an enlarged soil - holding cavity. As the handle rotates and drills downward into the soil surface, the soil sample of the layer to be collected can be introduced into the cavity. With the continuous development of technology, existing soil samplers mostly use electricity. The drill at the top drives the sampling pipe 2 to extend into the soil to complete the sampling task.

[0003] A Chinese patent with the publication number CN112067343A discloses a sampling device for geotechnical engineering investigation and its usage method. The key points of its technical solution are: including a working fixed platform and an upper positioning sleeve. This invention can conveniently use the sampling device for geotechnical engineering investigation, and can quickly and stably fix and install the whole device. The disassembly and preservation to prevent sample contamination after sampling are also very convenient, with strong practicability. However, when sampling soft soil and sandy soil, when the traditional sampler preserves the sample after sampling, since the sampler itself needs to continue working, continuous vibration will be generated, thus causing varying degrees of disturbance to the preserved sample, which affects the quality of the soil sample taken. As a result, the sample is prone to damage and water content loss after strong vibration, leading to inaccurate sample detection. Summary of the Invention

[0004] The present invention provides a sampling device and a usage method for geotechnical engineering investigation, which can reduce the varying degrees of disturbance to the preserved sample caused by the continuous vibration of the sampler during operation, avoid the sample being easily damaged and losing water content after strong vibration, resulting in inaccurate sample detection; improve the integrity of the detected sample and increase the accuracy of sample detection.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A sampling device for geotechnical engineering investigation includes a sampling machine. The bottom of the sampling machine is detachably connected with a sampling pipe. A chute is provided on the side wall of the sampling machine. A slider is elastically arranged inside the chute. A receiving device that is shock - absorbed by the slider is fixedly provided on the outer side of the slider.

[0006] Preferably, at least one first spring is respectively arranged at the upper end and the lower end of the slider. The upper first spring is fixedly connected to the top inside the chute, and the lower first spring is fixedly connected to the bottom inside the chute.

[0007] Preferably, two groups of cover plates are rotatably connected to the top of the storage device, and sealing strips are fixedly arranged on one side of the two cover plates close to each other.

[0008] Preferably, a hollow elastic block is fixedly arranged inside the storage device. The elastic block is located below the cover plate. Connecting pipes are fixedly arranged on both sides of the cover plate at the top of the storage device. The elastic block is communicated with the connecting pipes and inflates into the connecting pipes. A movable blocking device is arranged at the pipe orifice of the connecting pipe. The blocking device can block and open the pipe orifice of the connecting pipe under the action of an external force. An impact plate that can impact the sampling pipe is fixedly arranged on the surface of the blocking device. A top rod for preventing the cover plate from resetting excessively is fixedly arranged outside the connecting pipe.

[0009] Preferably, a plurality of grooves are formed inside the connecting pipe. A sliding plate is slidably connected inside the grooves. One end of the sliding plate close to the pipe orifice of the connecting pipe is fixedly provided with a blocking device. A connecting plate is fixedly arranged on the surface of the blocking device. Impact plates are fixedly arranged on one side of the connecting plates close to each other. A fillet is formed on one side of the impact plate. The other end of the sliding plate is slidably connected inside the groove through a second spring.

[0010] Preferably, baffles are fixedly arranged on one side of the sliding plates in the plurality of grooves close to each other. Through holes are formed in the baffles. End caps are rotatably connected inside the through holes through torsion springs.

[0011] Preferably, a plurality of rectangular grooves are formed inside the storage device. Electric push rods are fixedly arranged inside the rectangular grooves. The output ends of the electric push rods are fixedly provided with rectangular plates. A storage tank is arranged inside the storage device. One end of the rectangular plate close to the storage tank is inclined. An arc-shaped groove is formed on the outer surface of the storage tank. A sliding plate is elastically connected inside the arc-shaped groove. A roller is rotatably connected to one end of the sliding plate far from the arc-shaped groove. The roller can be clamped by the rectangular plate. The bottom of the storage device is connected to a base in an openable manner.

[0012] Preferably, an inclined guide plate is fixedly arranged at the bottom end of the cover plate. A support rod is fixedly arranged on one side of the guide plate. An arc-shaped pressing plate is fixedly arranged on one side of the support rod far from the guide plate. A rotating shaft is rotatably connected to one side of the pressing plate far from the support rod. A semi-circular protrusion is arranged on the surface of the rotating shaft. A sealing plate made of rubber is fixedly arranged on the side wall of the support rod.

[0013] Preferably, a plurality of welding plates are fixedly arranged at the bottom of the inner wall of the storage device. Rubber-made convex platforms are fixedly arranged at the other ends of the welding plates.

[0014] Preferably, a ferrule is fixedly arranged on the side wall of the base. The ferrule is made of rubber.

[0015] The present invention also provides a sampling method for geotechnical engineering investigation, including the following steps:

[0016] Step 1: Assemble the sampling tube of the above sampling machine. Install pipe boots at both ends of the sampling tube, and then install an impact adapter at the upper end of the assembled sampling tube. At the same time, start the main machine of the sampling machine, put the main machine on the impact adapter and start the sampling work;

[0017] Step 2: When the sampling machine samples the soil, hold the sampling machine tightly and drive it to rotate, so that the sampling machine drives the sampling tube to rotate into the soil. After sampling, remove the main machine of the sampling machine. At the same time, the top end of the sampling tube is exposed above the ground;

[0018] Step 3: When removing the sampled sampling tube from the soil, when pulling out the sampling tube, clamp the clamp on the sampling tube. The end with the larger opening of the clamp faces down, and the end with the smaller opening faces up. Then install the chain on the clamp on the extractor. By pressing the extractor, the extractor drives the clamp and the sampling tube to slowly move up through the chain, so as to remove the sampling tube from the soil. Then remove the pipe boots at both ends of the sampling tube and knock on the sampling tube to take out the soil sample in the sampling tube.

[0019] The present invention has the following beneficial effects:

[0020] 1. The present invention provides a sampling device and a use method for geotechnical engineering investigation. By putting the sampled soil sample into the storage device, when the sampling machine starts to vibrate, since the slider is slidably connected in the chute, and there are also multiple first springs at the upper and lower ends of the slider for buffering and increasing resistance, the slider and the storage device can reduce the amplitude of vibration, thereby protecting the soil sample in the storage device, reducing the damage to the soil sample caused by vibration and the loss of water content, and improving the integrity of the soil sample.

[0021] 2. The present invention provides a sampling device and a use method for geotechnical engineering investigation. Through the second spring driving the elastic member to continuously reset and impact, the purpose of multiple impacts is achieved, so that the soil in the sampling tube starts to loosen, and then it is convenient to take out the soil from the sampling tube and drop it into the storage device later. When the plugging device is not used, let it reset. After resetting, the plugging device plays a role in sealing the connecting pipe, making it difficult for external dust to enter the connecting pipe, thereby ensuring the normal flow of gas in the connecting pipe and preventing it from being blocked. When the sampling tube leaves the storage device, the cover plate resets. At this time, the ejector rod at the bottom end of the connecting pipe plays a role in positioning the cover plate to prevent the ejector rod from over-resetting. In addition to the cover plate sealing the storage device, the sealing plate provided on the upper part of the storage tank also seals the storage tank when the storage device is closed, both ensuring the loss of the soil sample and water content and protecting the integrity of the sample, and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the partial structure of the storage device of the present invention.

[0024] Figure 3 This is a schematic diagram of the partial structure of the storage tank of the present invention.

[0025] Figure 4 This is a schematic diagram of the partial structure of the connecting pipe of the present invention.

[0026] Figure 5 For the present invention Figure 3 The enlarged schematic diagram of the structure at position A in.

[0027] Figure 6 This is a schematic diagram of the structure of the arc groove of the present invention.

[0028] Figure 7 It is the present invention Figure 3 The enlarged schematic diagram of the structure at position B in.

[0029] Figure 8 This is a schematic diagram of the partial structure of the base of the present invention.

[0030] Figure 9 This is a schematic diagram of the structure of the ferrule of the present invention.

[0031] Wherein: 1. Sampling machine; 2. Sampling pipe; 3. Slide groove; 4. Slide block; 5. Storage device; 6. First spring; 7. Cover plate; 8. Sealing strip; 9. Elastic block; 10. Connecting pipe; 11. Groove; 12. Slide plate; 13. Second spring; 14. Sealing device; 15. Connecting plate; 16. Impact plate; 17. Rounding; 18. Thrust rod; 19. Baffle; 20. Through hole; 21. End cover; 22. Rectangular groove; 23. Electric push rod; 24. Rectangular plate; 25. Storage tank; 26. Arc groove; 27. Slide plate; 28. Roller; 29. Guide plate; 30. Support rod; 31. Extrusion plate; 32. Rotating shaft; 33. Sealing plate; 34. Base; 35. Bolt; 36. Welding plate; 37. Boss; 38. Ferrule; 39. Elastic sheet. Detailed implementation mode

[0032] The present invention will be specifically described below with reference to the accompanying drawings. The present invention provides a technical solution: a sampling device for geotechnical engineering investigation, as Figures 1 to 9As shown in the figure, it includes a sampling machine 1. A sampling tube 2 is threadedly connected to the bottom of the sampling machine 1. A chute 3 is provided on the side wall of the sampling machine 1. A slider 4 is slidably connected to the inner wall of the chute 3. A storage device 5 is fixedly installed at one end of the slider 4 away from the chute 3. A plurality of first springs 6 are fixedly installed at the upper and lower ends of the slider 4. One end of the first spring 6 away from the slider 4 is fixedly connected to the chute 3. When sampling soft soil and sandy soil, when the traditional sampler completes sampling and preserves the sample, since the sampler itself needs to continue working, it will continuously generate vibrations, thus disturbing the preserved sample to varying degrees, thereby affecting the quality of the soil sample taken. As a result, the sample is prone to damage and water content loss after strong vibrations, leading to inaccurate detection of the sample. When the present invention is working, by putting the sampled soil sample into the storage device 5, when the sampling machine 1 starts to vibrate, since the slider 4 is slidably connected in the chute 3, and at the same time there are a plurality of first springs 6 at the upper and lower ends of the slider 4 for buffering and increasing resistance, the slider 4 and the storage device 5 can reduce the amplitude of vibration, thereby playing a role in protecting the soil sample in the storage device 5, reducing the damage to the soil sample and the loss of water content caused by vibration, improving the integrity of the soil sample, and thus greatly improving the detection accuracy of the soil sample.

[0033] Two groups of cover plates 7 are rotatably connected to the top of the storage device 5 through torsion springs. A sealing strip 8 made of rubber is fixedly installed on one side of the two groups of cover plates 7 close to each other. During operation, when the sampling tube 2 is at the upper end of the storage device 5, continue to push the sampling tube 2 into the storage device 5, so that the bottom of the sampling tube 2 pushes open the cover plate 7, and the cover plate 7 rotates and opens into the storage device 5, thereby facilitating the soil sample to slide into the storage device 5 through the sampling tube 2. When the sampling tube 2 is pulled out of the storage device 5, the torsion spring will drive the cover plate 7 to reset, so that the cover plate 7 closes the storage device 5 again. At the same time, the sealing strip 8 on one side of the two groups of cover plates 7 close to each other plays a sealing role, reducing dust and impurities from entering the storage device 5, and the sealing strip 8 can also play a role in increasing friction, making the two groups of cover plates 7 fixed to each other and not easily opened.

[0034] Inside the receiving frame, a hollow elastic block 9 is fixedly installed. The elastic block 9 is located directly below the cover plate 7. At the top of the receiving device 5, two groups of "L"-shaped connecting pipes 10 are fixedly installed. The inside of the connecting pipe 10 is hollow. The surface of the elastic block 9 is connected to the inside of the connecting pipe 10 through a hollow pipe. Inside the connecting pipe 10, a plurality of grooves 11 are provided. A sliding plate 12 is slidably connected inside the groove 11. One end of the sliding plate 12 is fixedly installed with a blocking device 14. On the surface of the blocking device 14, a plurality of connecting plates 15 forming an "eight" shape are fixedly installed. On the side where the multiple groups of connecting plates 15 are close to each other, an impact plate 16 in a "V" shape is fixedly installed. A rounded corner 17 is provided on one side of the impact plate 16. The blocking device 14 is preferably a blocking ball. The center of the blocking ball is outside the connecting pipe 10. A second spring 13 is fixedly connected inside the groove 11. The other end of the second spring 13 is fixedly connected to the sliding plate 12. At the bottom of the connecting pipe 10, an inclined ejector rod 18 is fixedly installed. During operation, when the cover plate 7 rotates and opens into the receiving device 5, the cover plate 7 will squeeze the elastic block 9 inside the receiving device 5, causing the gas inside the elastic block 9 to quickly fill into the connecting pipe 10 through the hollow pipe. Then, the gas pushes the blocking device 14 to move away from the connecting pipe 10. The blocking device 14 moves through the sliding plate 12, and at the same time drives the second spring 13 to move together. When the sampling tube 2 enters the receiving device 5, the blocking device 14 drives the connecting plates 15 and the impact plate 16 to impact the surface of the sampling tube 2. The connecting plates 15 and the impact plate 16 increase the impact area, thereby improving the impact efficiency. The rounded corner 17 on the impact plate 16 plays a role in buffering and protecting the sampling tube 2, avoiding damage to the sampling tube 2 caused by multiple impacts. After the sampling tube 2 is impacted, vibrations will occur. When the impact plate 16 impacts the sampling tube 2, due to the generated impact force, the sliding plate 12 will drive the blocking device 14, the connecting plates 15 and the impact plate 16 to reset into the connecting pipe 10, and then drive the elastic part through the second spring 13 to continuously reset and impact, so as to achieve the purpose of multiple impacts, making the soil inside the sampling tube 2 start to loosen, and then facilitating the subsequent removal of the soil from the sampling tube 2 and dropping it into the receiving device 5. When the blocking device 14 is not in use, it is reset. The reset blocking device 14 plays a role in closing the connecting pipe 10, making it difficult for external dust to enter the connecting pipe 10, thereby ensuring the normal flow of gas inside the connecting pipe 10 and preventing it from being blocked. When the sampling tube 2 leaves the receiving device 5, the cover plate 7 resets. At this time, the ejector rod 18 at the bottom of the connecting pipe 10 plays a role in positioning the cover plate 7, preventing the ejector rod 18 from over-resetting.

[0035] One side of multiple skateboards 12 close to each other is fixedly connected with a baffle 19. One side of the baffle 19 is provided with a through hole 20 penetrating itself. The inner wall of the through hole 20 is rotatably connected with an end cover 21 through a torsion spring; during operation, when gas is quickly filled into the connecting pipe 10, the gas will impact the baffle 19, causing the gas to drive the baffle 19 to move. Only then can the baffle 19 drive the skateboard 12 to move together, thereby realizing the function of driving the plugging device 14 to move. After the gas pushes the baffle 19, the gas will push open the end cover 21 in the through hole 20 and open the end cover 21 to allow the gas to pass through, thereby realizing the ventilation function. The baffle 19 is used to quickly push the plugging device 14 away from the connecting pipe 10, and at the same time, the gas can blow out through the baffle 19.

[0036] A plurality of rectangular grooves 22 are opened inside the storage device 5. An electric push rod 23 is fixedly installed inside the rectangular groove 22. The output end of the electric push rod 23 is fixedly installed with a rectangular plate 24. A storage tank 25 is arranged inside the storage device 5. One end of the rectangular plate 24 close to the storage tank 25 is inclined. An arc-shaped groove 26 is opened on the outer surface of the storage tank 25. A sliding plate 27 is slidably connected inside the arc-shaped groove 26. An elastic piece 39 is fixedly installed on the inner wall of the arc-shaped groove 26. The other end of the elastic piece 39 is fixedly connected with the sliding plate 27. A roller 28 is rotatably connected to one end of the sliding plate 27 away from the elastic piece 39. Both the roller 28 and the rectangular plate 24 are made of magnet material. The bottom of the storage device 5 is hinged with a base 34. A bolt 35 is threadedly connected to the bottom of the base 34. A threaded hole is opened at the bottom of the storage device 5; during operation, when the sampling tube 2 enters the storage device 5, the soil will fall into the storage tank 25, and the storage tank 25 will collect and store the soil sample. When the sampling is completed and the storage tank 25 needs to be taken out of the storage device 5, the electric push rod 23 in the rectangular groove 22 is activated, and the electric push rod 23 drives the rectangular plate 24 and the storage tank 25 to move away from the storage device 5. The storage tank 25 is adsorbed and fixed by the roller 28 and the rectangular plate 24 made of magnet material. At the same time, the rectangular plate 24 plays a role in supporting the sliding plate 27, so that the storage tank 25 will not fall; while the storage tank 25 is moving, the bolt 35 at the bottom of the storage device 5 is turned, and then the base 34 at the bottom of the storage device 5 is quickly opened, so as to facilitate the storage tank 25 to leave the storage device 5. Then, the storage tank 25 is pulled. At this time, the storage tank 25 has a downward force, and the downward force causes the roller 28 to drive the sliding plate 27 to slide and contract into the arc-shaped groove 26, so that the sliding plate 27 and the roller 28 no longer contact the rectangular plate 24. The inclined surface on the rectangular plate 24 plays a guiding role while the roller 28 is moving, thereby facilitating the taking out of the storage tank 25, and the soil sample is taken out for testing and analysis.

[0037] The bottom end of the cover plate 7 is fixedly installed with an inclined guide plate 29. One side of the guide plate 29 is fixedly installed with a support rod 30. The end of the support rod 30 far from the guide plate 29 is fixedly installed with an arc-shaped extrusion plate 31. One side of the extrusion plate 31 far from the support rod 30 is rotatably connected with a rotating shaft 32. The surface of the rotating shaft 32 has a semi-circular protrusion. The side wall of the support rod 30 is fixedly installed with a sealing plate 33 made of rubber material; during operation, when the cover plate 7 is opened, it will drive the guide plate 29 to rotate together, so that the guide plate 29 rotates towards the storage tank 25. At this time, the guide plate 29 plays a role in guiding the soil entering the storage tank 25, and at the same time can also make up for the gap between the storage tank 25 and the cover plate 7 to prevent the soil from flowing out through the gap between the cover plate 7 and the storage tank 25; when the guide plate 29 rotates, it drives the support rod 30 and the extrusion plate 31 to rotate together, so that the extrusion plate 31 and the boss 37 on the rotating shaft 32 play an auxiliary extrusion role on the elastic block 9, thereby accelerating the flow of the gas in the elastic block 9 into the connecting pipe 10. When the support rod 30 drives the extrusion plate 31 to rotate, it will also drive the sealing plate 33 to move. Since the sealing plate 33 is made of rubber material, the sealing plate 33 will contact the inner wall of the storage device 5 and deform, so as not to hinder the rotation of the extrusion plate 31. When the cover plate 7 drives the guide plate 29 and the support rod 30 to reset, the sealing plate 33 covers the port of the storage tank 25, thereby playing a role in sealing the storage tank 25, and further reducing the loss of the soil sample in the storage tank 25, thus greatly improving the accuracy of the soil sample detection.

[0038] A plurality of welding plates 36 are fixedly installed on the inner wall of the storage device 5. The other end of the welding plate 36 is fixedly installed with a boss 37 made of rubber material; during operation, by installing a plurality of welding plates 36 on the inner wall of the storage device 5, the boss 37 at one end of the welding plate 36 plays a role in supporting the storage tank 25. At the same time, when the storage tank 25 moves towards the base 34, since the bottom of the storage tank 25 is provided with a chamfer, and the boss 37 is made of rubber material, the chamfer at the bottom of the storage tank 25 plays a guiding role, and then extrudes the boss 37 to make it deform, so as to smoothly pass through the boss 37 and play a role in facilitating sliding.

[0039] A collar 38 is fixedly installed on the side wall of the base 34. The collar 38 is made of rubber material; during operation, by installing a rubber collar 38 on the side wall of the base 34, the collar 38 plays a role in sealing the base 34, making it difficult for external dust to enter through the gap between the base 34 and the storage device 5. At the same time, when the collar 38 is driven by the base 34 to reset towards the storage device 5, it will be squeezed against the inner wall of the storage device 5 and deform, thereby increasing the friction force, so as to play a better role in fixing and assisting in fixing the base 34. At the same time, pre-fixing the base 34 can free the hands of the staff and achieve the effect of facilitating the installation of the base 34.

[0040] Working principle: By putting the sampled soil sample into the storage device 5, when the sampler 1 starts to vibrate, since the slider 4 is slidably connected in the chute 3, and there are multiple first springs 6 at the upper and lower ends of the slider 4 for buffering and increasing resistance, the slider 4 and the storage device 5 can reduce the amplitude of vibration, thereby protecting the soil sample in the storage device 5, reducing the damage to the soil sample caused by vibration and the loss of water content, improving the integrity of the soil sample, and thus greatly improving the detection accuracy of the soil sample.

[0041] When the sampling tube 2 is at the upper end of the storage device 5, continue to push the sampling tube 2 into the storage device 5, so that the bottom of the sampling tube 2 pushes open the cover plate 7, and the cover plate 7 rotates and opens into the storage device 5, which facilitates the soil sample to slide into the storage device 5 through the sampling tube 2. When the sampling tube 2 is withdrawn from the storage device 5, the torsion spring will drive the cover plate 7 to reset, so that the cover plate 7 closes the storage device 5 again. At the same time, the sealing strips 8 on the sides of the two cover plates 7 close to each other play a sealing role, reducing the entry of dust and impurities into the storage device 5, and the sealing strips 8 can also increase friction, so that the two cover plates 7 are fixed to each other and will not be easily opened. When the cover plate 7 rotates and opens into the storage device 5, the cover plate 7 will squeeze the elastic block 9 in the storage device 5, so that the gas in the elastic block 9 quickly fills into the connecting pipe 10 through the hollow pipe, and then the gas pushes the blocking device 14 to move away from the connecting pipe 10. The blocking device 14 moves through the slide plate 12, and at the same time drives the second spring 13 to move together, so that when the sampling tube 2 enters the storage device 5, the blocking device 14 drives the connecting plate 15 and the impact plate 16 to impact the surface of the sampling tube 2. The connecting plate 15 and the impact plate 16 increase the impact area, thereby improving the impact efficiency. The rounded corners 17 on the impact plate 16 play a role in buffering and protecting the sampling tube 2, avoiding damage to the sampling tube 2 caused by multiple impacts. After the sampling tube 2 is impacted, vibrations will occur. When the impact plate 16 impacts the sampling tube 2, the impact force generated will cause the slide plate 12 to drive the blocking device 14, the connecting plate 15 and the impact plate 16 to reset into the connecting pipe 10, so that the second spring 13 drives it to continuously reset and impact, so as to achieve the purpose of multiple impacts, making the soil in the sampling tube 2 start to loosen, which facilitates the subsequent removal of the soil from the sampling tube 2 and dropping it into the storage device 5. When the blocking device 14 is not in use, let it reset. The reset blocking device 14 plays a role in closing the connecting pipe 10, making it difficult for external dust to enter the connecting pipe 10, thus ensuring the normal flow of gas in the connecting pipe 10 and preventing it from being blocked. When the sampling tube 2 leaves the storage device 5, the cover plate 7 resets. At this time, the ejector rod 18 at the bottom of the connecting pipe 10 plays a role in positioning the cover plate 7, preventing the ejector rod 18 from over-resetting. When the gas quickly fills into the connecting pipe 10, the gas will impact the baffle 19, so that the gas drives the baffle 19 to move, and the baffle 19 can drive the slide plate 12 to move together, thus realizing the function of driving the blocking device 14 to move. After the gas pushes the baffle 19, it will push open the end cover 21 in the through hole 20 and open the end cover 21 to allow the gas to pass through, thus realizing the ventilation function. The baffle 19 is used to quickly push the blocking device 14 away from the connecting pipe 10, and at the same time enables the gas to blow out through the baffle 19.After the sampling tube 2 enters the storage device 5, the soil will fall into the storage tank 25, and the storage tank 25 will collect and store the soil sample. When the sampling is completed and the storage tank 25 needs to be taken out of the storage device 5, the electric push rod 23 in the rectangular groove 22 is used to move the electric push rod 23 together with the rectangular plate 24 and the storage tank 25 away from the storage device 5. The storage tank 25 is adsorbed and fixed by the roller 28 made of magnetic material and the rectangular plate 24. At the same time, the rectangular plate 24 plays a role in supporting the sliding plate 27, so that the storage tank 25 will not fall. While the storage tank 25 is moving, the bolt 35 at the bottom of the storage device 5 is turned, and then the base 34 at the bottom of the storage device 5 is quickly opened, so as to facilitate the storage tank 25 to leave the storage device 5. Then the storage tank 25 is pulled. At this time, there is a downward force on the storage tank 25, and the downward force causes the roller 28 to drive the sliding plate 27 to slide and contract into the arc groove 26, so that the sliding plate 27 and the roller 28 no longer contact the rectangular plate 24. The inclined surface on the rectangular plate 24 plays a guiding role while the roller 28 is moving, so as to facilitate taking out the storage tank 25, and the soil sample is taken out for testing and analysis. When the cover plate 7 is opened, it will drive the guide plate 29 to rotate together, so that the guide plate 29 rotates towards the storage tank 25. At this time, the guide plate 29 plays a role in guiding the soil entering the storage tank 25, and at the same time, it can also make up for the gap between the storage tank 25 and the cover plate 7 to prevent the soil from flowing out through the gap between the cover plate 7 and the storage tank 25. When the guide plate 29 rotates, it drives the support rod 30 and the pressing plate 31 to rotate together, so that the pressing plate 31 and the boss 37 on the rotating shaft 32 play an auxiliary pressing role on the elastic block 9, so as to make the gas in the elastic block 9 flow into the connecting pipe 10 faster. When the support rod 30 drives the pressing plate 31 to rotate, it will also drive the sealing plate 33 to move. Since the sealing plate 33 is made of rubber, the sealing plate 33 will contact the inner wall of the storage device 5 and deform, so as not to hinder the rotation of the pressing plate 31. When the cover plate 7 drives the guide plate 29 and the support rod 30 to reset, the sealing plate 33 covers the port of the storage tank 25, so as to seal the storage tank 25, thereby reducing the loss of the soil sample in the storage tank 25, and greatly improving the accuracy of the soil sample detection.

[0042] By installing a plurality of welding plates 36 on the inner wall of the storage device 5, the boss 37 at one end of the welding plate 36 plays a role in supporting the storage tank 25. At the same time, when the storage tank 25 moves towards the base 34, since the bottom of the storage tank 25 is provided with a chamfer and the boss 37 is made of rubber material, the chamfer at the bottom of the storage tank 25 plays a guiding role, and then squeezes the boss 37 to deform it, so as to smoothly pass through the boss 37 and play a role in facilitating sliding.

[0043] The present invention also provides a sampling method for geotechnical engineering investigation, including the following steps:

[0044] Step 1: First, assemble the sampling tube 2 of the above sampling machine 1. Install pipe shoes at both ends of the sampling tube 2, and then install an impact adapter at the upper end of the assembled sampling tube 2. Insert the assembled sampling tube 2 into the soil, and at the same time start the main engine of the sampling machine 1. Put the main engine on the impact adapter to start the sampling work;

[0045] Step 2: When the sampling machine 1 samples the soil, the staff holds the sampling machine 1 tightly and drives it to rotate, so that the sampling machine 1 drives the sampling tube 2 to rotate into the soil. After sampling, remove the main engine of the sampling machine 1, and at the same time, the top end of the sampling tube 2 is exposed above the ground;

[0046] Step 3: When removing the sampled sampling tube 2 from the soil, when pulling out the sampling tube 2, first clamp the sampler on the sampling tube 2, with the end with the larger opening of the sampler facing down and the end with the smaller opening facing up. Then install the chain on the sampler on the extractor. By pressing the extractor, the extractor drives the sampler and the sampling tube 2 to slowly move upward through the chain, so as to slowly remove the sampling tube 2 from the soil, thus ensuring the integrity of the soil sample and facilitating subsequent sample testing. Then use a pipe wrench to remove the pipe shoes at both ends of the sampling tube 2, and then use a leather hammer to strike the sampling tube 2 to take out the soil sample in the sampling tube 2.

[0047] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. It should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

Claims

1. A sampling device for geotechnical engineering investigation, including a sampling machine, characterized in that, A sampling tube is detachably connected to the bottom of the sampling machine. A chute is provided on the side wall of the sampling machine. A slider is elastically arranged inside the chute. A storage device that is shock-absorbed by the slider is fixedly arranged on the outer side of the slider. Two groups of cover plates are rotatably connected to the top of the storage device. Sealing strips are fixedly arranged on the sides of the two groups of cover plates close to each other. A hollow elastic block is fixedly arranged inside the storage device. The elastic block is located below the cover plate. Connecting pipes are fixedly arranged on both sides of the cover plate at the top of the storage device. The elastic block is communicated with the connecting pipes and inflates the inside of the connecting pipes. A movable blocking device is arranged at the pipe orifice of the connecting pipe. The blocking device can block and open the pipe orifice of the connecting pipe under the action of an external force. An impact plate that can impact the sampling tube is fixedly arranged on the surface of the blocking device. A top rod that prevents the cover plate from resetting excessively is fixedly arranged outside the connecting pipe. A plurality of grooves are formed inside the connecting pipe. A sliding plate is slidably connected inside the grooves. A blocking device is fixedly arranged at one end of the sliding plate close to the pipe orifice of the connecting pipe. A connecting plate is fixedly arranged on the surface of the blocking device. Impact plates are fixedly arranged on the sides of the connecting plates close to each other. A fillet is formed on one side of the impact plate. The other end of the sliding plate is slidably connected inside the grooves through a second spring.

2. The sampling device for geotechnical engineering investigation according to claim 1, characterized in that, At least one first spring is respectively arranged at the upper end and the lower end of the slider. The upper first spring is fixedly connected to the top inside the chute, and the lower first spring is fixedly connected to the bottom inside the chute.

3. The sampling device for geotechnical engineering investigation according to claim 1, characterized in that, Baffles are fixedly arranged on the sides of the sliding plates in the plurality of grooves close to each other. Through holes are formed in the baffles. End covers are rotatably connected inside the through holes through torsion springs.

4. The sampling device for geotechnical engineering investigation according to claim 1, characterized in that, A plurality of rectangular grooves are formed inside the storage device. Electric push rods are fixedly arranged inside the rectangular grooves. A rectangular plate is fixedly arranged at the output end of the electric push rods. A storage tank is arranged inside the storage device. One end of the rectangular plate close to the storage tank is inclined. An arc-shaped groove is formed on the outer surface of the storage tank. A sliding plate is elastically connected inside the arc-shaped groove. A roller is rotatably connected to one end of the sliding plate away from the arc-shaped groove. The roller can be clamped by the rectangular plate. The bottom of the storage device is detachably connected with a base.

5. The sampling device for geotechnical engineering investigation according to claim 4, wherein, An inclined guide plate is fixedly arranged at the bottom end of the cover plate. A support rod is fixedly arranged on one side of the guide plate. An arc-shaped pressing plate is fixedly arranged on the side of the support rod away from the guide plate. A rotating shaft is rotatably connected to the surface of the pressing plate away from the support rod. A semi-circular protrusion is arranged on the surface of the rotating shaft. A sealing plate made of rubber is fixedly arranged on the side wall of the support rod.

6. The sampling device for geotechnical engineering investigation according to claim 4, characterized in that, A plurality of welding plates are fixedly arranged at the bottom of the inner wall of the storage device. Rubber-made bosses are fixedly arranged at the other ends of the welding plates.

7. The sampling device for geotechnical engineering investigation according to claim 4, characterized in that, A ferrule is fixedly arranged on the side wall of the base. The ferrule is made of rubber.

8. A sampling method for geotechnical engineering investigation, characterized in that, Including the following steps: Step 1: Assemble the sampling tubes of the sampling device according to any one of claims 1-7. Install pipe boots at both ends of the sampling tubes. Then install an impact socket at the upper end of the assembled sampling tubes. At the same time, start the main machine of the sampling machine, put the main machine on the impact socket and start the sampling work. Step 2: When the sampling machine samples the soil, hold the sampling machine tightly and drive it to rotate, so that the sampling machine drives the sampling tubes to rotate into the soil. After sampling, remove the main machine of the sampling machine. At the same time, the top ends of the sampling tubes are exposed above the ground. Step 3: When removing the sampling tube that has completed sampling from the soil, when pulling out the sampling tube, clamp the gripper on the sampling tube, with the end with the larger opening of the gripper facing downwards and the end with the smaller opening facing upwards. Then install the chain on the gripper onto the extractor. By pressing the extractor, the extractor drives the gripper and the sampling tube to slowly move upwards through the chain, thereby removing the sampling tube from the soil. Then remove the pipe boots at both ends of the sampling tube and tap the sampling tube to take out the soil sample inside the sampling tube.

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