Geotechnical investigation stratified sampling equipment and stratified sampling method

Abstract

The invention relates to the technical field of rock-soil sampling, and provides rock-soil investigation stratified sampling equipment and a stratified sampling method.The rock-soil investigation stratified sampling equipment comprises a frame body and further comprises a splicing sampling barrel, a driving mechanism and a splicing mechanism, the splicing sampling barrel is of a splicing structure, and the splicing sampling barrel comprises half barrel bodies, connecting pieces and inserting rods; the connecting piece is arranged on the half barrels and used for connecting the two half barrels, the driving mechanism is used for driving the spliced sampling barrels to descend gradually, the splicing mechanism is used for splicing the half barrels, the splicing mechanism comprises a storage box, a push rod, a feeding box and a push plate, the push rod is arranged on the storage box in a sliding mode and used for pushing the half barrels to move to a discharging opening, and the feeding box is used for feeding the half barrels to the discharging opening. The push plate is movably arranged on the feeding box and used for pushing the half barrels to the driving mechanism. By means of the technical scheme, the problems that in the prior art, the sampling depth is limited, the sample continuity is poor, and the sampling efficiency is low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of rock and soil sampling, and in particular to a rock and soil survey stratified sampling device and a stratified sampling method. Background Art

[0002] Geotechnical investigation is the work that needs to be done on the basis of engineering geological surveying to further clarify the engineering geological conditions below the surface, such as the spatial distribution and changes of rock and soil layers, the depth and type of groundwater, and the in-situ testing of geotechnical parameters. Sampling is the work that is carried out to provide the samples needed for the identification of rock and soil characteristics and various indoor tests.

[0003] In order to improve the comprehensiveness of geotechnical investigation, it is necessary to sample soil at different depths of the surface. The current geotechnical sampling equipment needs to continue drilling at the same position when sampling soil through a drill tube. Before sampling, the profile should be repaired and cleaned, and the topmost loose soil should be removed. Then, samples are taken from the central typical position layer by layer from top to bottom. The sampling process is relatively cumbersome, and the sampling equipment is highly fixed, the drilling depth is relatively limited, and multiple samplings are performed at the same time. The soil sample is in a multi-section fracture shape with poor continuity. Therefore, we propose a geotechnical investigation stratified sampling device and a stratified sampling method, which can perform continuous sampling during the drilling process, with high sampling efficiency and relatively complete soil samples. Summary of the invention

[0004] The present invention provides a stratified sampling device and a stratified sampling method for geotechnical investigation, which solve the problems of limited sampling depth, poor sample continuity and low sampling efficiency in the prior art.

[0005] The technical solution of the present invention is as follows:

[0006] The geotechnical investigation layer sampling equipment includes a frame and also includes:

[0007] The spliced ​​sampling tube is a spliced ​​structure, and the spliced ​​sampling tube includes:

[0008] A half cylinder, wherein a plurality of half cylinders are provided, and two of the half cylinders can be spliced ​​into a cylindrical shape;

[0009] A connecting piece, which is arranged on the semi-cylinder and is used to connect the two semi-cylinders, and the connecting piece includes:

[0010] A plug plate, wherein a plurality of the plug plates are provided, and the plug plates are arranged on one side of the semi-cylinder, and the semi-cylinder is provided with a plurality of slots matching the plug plates;

[0011] A limit plate, wherein a limit slot is provided on the plug plate, the limit slot is communicated with the slot, the limit plate is arranged inside the limit slot through a limit spring and a telescopic rod, and a limit hole matching the limit plate is provided on the plug plate;

[0012] An insertion rod, the insertion rod is arranged at the top end of the semi-cylinder, and the bottom of the driving plate and the bottom of the semi-cylinder are both provided with a plug hole matching the insertion rod;

[0013] A driving mechanism, the driving mechanism is used to drive the spliced ​​sampling tube to descend successively, and the driving mechanism includes:

[0014] A lifting platform, a return spring is arranged between the lifting platform and the frame, and the lifting platform and the frame are in sliding cooperation;

[0015] A driving screw, the driving screw being rotatably disposed on the lifting platform;

[0016] A movable plate, wherein two movable plates are provided, and the movable plates are movably arranged on the frame body, and threaded holes matching the driving screw are provided on the sides of the two movable plates close to each other;

[0017] A driving plate, the driving plate is rotatably arranged at the bottom of the driving screw, and the driving plate and the frame are in sliding cooperation;

[0018] A splicing mechanism, the splicing mechanism is used to splice the half cylinders, and the splicing mechanism includes:

[0019] A storage box, wherein two storage boxes are provided, the storage boxes are arranged on the frame, the two storage boxes are located on both sides of the driving mechanism, the semi-cylinder is placed inside the storage box, and a material drop opening is opened on the storage box;

[0020] A push rod, which is slidably disposed on the storage box and is used to push the semi-cylinder to move to the blanking port;

[0021] A feeding box, the feeding box is arranged below the storage box, and the semi-cylinder falls into the interior of the feeding box from the drop opening;

[0022] A push plate is movably arranged on the feeding box and is used to push the semi-cylinder toward the driving mechanism.

[0023] In order to reduce the shaking of the semi-cylinder in the storage box, a limiting component is also included, and the limiting component is used to limit the semi-cylinder in the storage box. The limiting component includes:

[0024] A baffle, a support frame is arranged on the storage box, the baffle is rotatably arranged on the support frame, a compression spring is arranged between the baffle and the support frame, and the baffle is in contact with the semi-cylinder near the side of the blanking port.

[0025] In order to facilitate drilling into the soil, a drill bit is also included. The bottom of the drill bit is provided with a plurality of cutting teeth, and the top of the drill bit is provided with a plurality of insertion rods for inserting into the insertion holes on the semi-cylinder.

[0026] In order to improve the connection stability between the upper and lower adjacent half cylinders, between the half cylinder and the driving plate, and between the half cylinder and the drill bit, magnets are provided at the top and bottom ends of the half cylinder and the top of the drill bit, and the upper part of the magnet is an N pole.

[0027] In order to realize the synchronous movement of the moving plate and the semi-cylinder, the push plate and the moving plate are connected by a transmission assembly, and the transmission assembly includes:

[0028] A transmission gear, the transmission gear being rotatably disposed on the frame;

[0029] A driving rack and a driven rack, wherein the driving rack is connected to the push plate via a connecting frame 1, and the driven rack is connected to the movable plate via a connecting frame 2, the driving rack and the driven rack are centrally symmetrical with respect to the transmission gear, and both the driving rack and the driven rack are meshed with the transmission gear.

[0030] In order to facilitate the disassembly of the semi-cylinder, a threaded hole is provided on the limit plate for pulling the limit plate after the bolts are installed.

[0031] In order to facilitate the threaded cooperation between the driving screw and the movable plate after the screw is raised, a compression spring and a telescopic rod are arranged between the movable plate and the second connecting frame, and a chamfer is arranged above the threaded hole.

[0032] The geotechnical investigation stratified sampling method uses the above-mentioned geotechnical investigation stratified sampling equipment and includes the following steps:

[0033] S1. The lifting platform is at the highest position. Push the two push rods to push the two half cylinders to the drop opening. The half cylinders fall into the feeding box. The two push plates push the two half cylinders at the same time. The two half cylinders are close to each other. The plug plate enters the inside of the slot to push the limit plate out. When the two half cylinders are close to each other, the limit plate is inserted into the inside of the limit hole under the action of the limit spring to limit the plug plate. The two half cylinders are spliced ​​into a cylinder. The plug rod at the top of the drill bit is inserted into the slot of the cylinder. The drill bit and the spliced ​​sampling cylinder are connected under the action of the magnet;

[0034] S2, the push plate is away from the semi-cylinder, and under the transmission action of the driving rack, the transmission gear and the driven rack, the two moving plates are brought closer to each other, the driving screw is rotated, the lifting platform and the driving plate are driven to descend, the plug rod of the spliced ​​sampling cylinder is inserted into the jack on the driving plate, the spliced ​​sampling cylinder and the driving plate are connected, and then the driving screw continues to rotate, driving the spliced ​​sampling cylinder and the drill bit to descend for drilling;

[0035] S3. During the drilling process, the soil enters the interior of the spliced ​​sampling cylinder. After descending the height of one half cylinder, the push rod is pushed to push the half cylinder down to the interior of the feeding box. The push plate pushes the half cylinder toward the driving mechanism. At the same time, the two moving plates move away from each other. The driving screw rises to its original position under the action of the reset spring. The driving plate and the spliced ​​sampling cylinder are separated. The two half cylinders approach each other to complete the splicing. Under the action of gravity, the spliced ​​sampling cylinder is lowered a certain distance and connected to the spliced ​​sampling cylinder below. Then the push plate is away from the half cylinder, the two moving plates approach each other, the driving screw rotates, the driving plate descends, and the new spliced ​​sampling cylinder is driven to descend to continue sampling.

[0036] S4. After descending to the required depth, the push plate approaches the driving mechanism, driving the screw rod to rise, and taking out the spliced ​​sampling cylinder from under the ground. The soil sample located inside the spliced ​​sampling cylinder is taken out, and the bolt is screwed into the threaded hole on the limit plate. The bolt is pulled to release the limit of the limit plate on the plug plate, and the half cylinder is disassembled to take out the soil sample.

[0037] The working principle and beneficial effects of the present invention are:

[0038] 1. In the present invention, the half cylinder is pushed into the interior of the feeding box by a push rod, and the half cylinder is pushed by a push plate. The two half cylinders are spliced ​​by the cooperation of an insert plate and a limit plate. The two upper and lower adjacent half cylinders and a drill bit are connected under the action of the insert rod and a magnet, so that the spliced ​​sampling tube is spliced ​​to a required depth, which can adapt to different sampling requirements. The bolt is screwed into the threaded hole of the limit plate, and the limit plate can be pulled by the bolt to separate the two half cylinders, so that it is easy to take out the soil sample from the inside of the spliced ​​sampling tube. At the same time, the soil sample is in a continuous state with good integrity, and soil samples of any depth can be tested.

[0039] 2. In the present invention, the threaded cooperation of the driving screw and the movable plate drives the spliced ​​sampling tube to descend for sampling. After descending to a certain depth, the push plate pushes the semi-cylinder body close to the driving mechanism to add the spliced ​​sampling tube. At the same time, the two movable plates are driven away from each other under the action of the transmission assembly. Under the action of the reset spring, the driving screw rises to its original position, and the subsequent drilling drive work is carried out to realize the successive descent of the spliced ​​sampling tube.

[0040] 3. Therefore, compared with the rock and soil sampling equipment in the prior art, the present invention can realize the free splicing of the sampling cylinder by setting a plurality of semi-cylinders, and at the same time, by driving the reciprocating lifting and lowering of the screw rod, the spliced ​​sampling cylinder is driven to descend successively to sample the soil completely. After the sampling is completed, the spliced ​​sampling cylinder is lifted above the ground, the screw rod is screwed into the threaded hole and the limit plate is pulled to disassemble the semi-cylinder, so that the soil sample in the spliced ​​sampling cylinder can be completely taken out, the continuity and integrity of the soil sample are maintained, and the sampling quality is guaranteed while adapting to the sampling requirements of different depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] Figure 1 It is a structural schematic diagram of the first viewing angle of the present invention;

[0043] Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention;

[0044] Figure 3 It is a structural schematic diagram of the driving mechanism of the present invention;

[0045] Figure 4 It is a structural schematic diagram of the half cylinder and the splicing mechanism of the present invention;

[0046] Figure 5 It is a schematic diagram of the exploded structure of the splicing mechanism of the present invention;

[0047] Figure 6 It is a schematic diagram of the structure of the driving plate, the spliced ​​sampling tube and the drill bit of the present invention;

[0048] Figure 7 This is a schematic diagram of the structure of the spliced ​​sampling tube of the present invention;

[0049] Figure 8 It is a structural schematic diagram of the push plate and the transmission assembly of the present invention;

[0050] Fig. 9 For the present invention Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0051] Fig.10 For the present invention Figure 7 Schematic diagram of the local enlarged structure at point B in the middle.

[0052] In the figure:

[0053] 1. Frame; 2. Threaded hole; 3. Drill bit; 4. Cutting teeth; 5. Magnet;

[0054] 101, half cylinder; 102, plug rod;

[0055] 201, plug plate; 202, limit plate; 203, limit spring;

[0056] 301, lifting platform; 302, driving screw; 303, moving plate; 304, driving plate; 305, return spring; 306, sliding rod; 307, motor; 308, limit rod;

[0057] 401, storage box; 402, push rod; 403, feeding box; 404, push plate; 405, electric cylinder;

[0058] 501, baffle; 502, support frame; 503, compression spring;

[0059] 601, transmission gear; 602, driving rack; 603, driven rack; 604, connecting frame 1; 605, connecting frame 2. DETAILED DESCRIPTION

[0060] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0061] like Figures 1 to 10 As shown, this embodiment proposes a geotechnical exploration stratified sampling equipment, including a frame 1, and also includes a spliced ​​sampling barrel, a driving mechanism and a splicing mechanism. Compared with the geotechnical sampling equipment in the prior art, the present invention can realize the free splicing of the sampling barrel by setting a plurality of semi-cylinders 101, and at the same time, by driving the reciprocating lifting and lowering of the screw rod 302, the spliced ​​sampling barrel is driven to descend successively to completely sample the soil. After the sampling is completed, the spliced ​​sampling barrel is lifted above the ground, the screw rod is screwed into the threaded hole 2, and the limit plate 202 is pulled, so that the semi-cylinder 101 can be disassembled, so that the soil sample in the spliced ​​sampling barrel can be completely taken out, the continuity and integrity of the soil sample are maintained, and the sampling quality is guaranteed while adapting to the sampling requirements of different depths.

[0062] like Figures 1 to 10As shown, the spliced ​​sampling tube is a spliced ​​structure, and the spliced ​​sampling tube includes a half cylinder 101, a connecting piece and a plug rod 102. The half cylinder 101 is provided with a plurality of parts, and two half cylinders 101 can be spliced ​​into a cylindrical shape. The connecting piece is arranged on the half cylinder 101, and is used to connect the two half cylinders 101. The connecting piece includes a plug plate 201 and a limit plate 202. The plug plate 201 is provided with a plurality of parts, and the plug plate 201 is arranged on one side of the half cylinder 101. The half cylinder 101 is provided with a plurality of slots matching the plug plate 201, and the plug plate 201 is provided with a plurality of slots matching the plug plate 201. The limiting groove is connected with the slot, the limiting plate 202 is arranged inside the limiting groove through the limiting spring 203 and the telescopic rod, the plug plate 201 is provided with a limiting hole matching the limiting plate 202, the plug rod 102 is arranged at the top of the semi-cylinder 101, the bottom of the driving plate 304 and the bottom of the semi-cylinder 101 are provided with a plug hole matching the plug rod 102, and multiple plug plates 201 are arranged in an interlaced manner. When the two semi-cylinders 101 are approaching each other, the plug plate 201 is inserted into the slot, and the ends of the plug plate 201 and the limiting plate 202 The two semi-cylinder bodies 101 are both provided with chamfers. As the plug plate 201 enters the interior of the slot, the limit plate 202 is pushed out. When the two semi-cylinder bodies 101 are pressed against each other, the plug plate 201 completely enters the interior of the slot. The limit plate 202 corresponds to the position of the limit hole. Under the action of the limit spring 203, the limit plate 202 is inserted into the interior of the limit hole to limit the plug plate 201, thereby ensuring the stability of the connection between the two semi-cylinder bodies 101. The two semi-cylinder bodies 101 are spliced ​​into a cylindrical spliced ​​sampling cylinder. The spliced ​​sampling cylinder is lowered to the ground, and the soil sample enters the spliced ​​sampling cylinder. To facilitate the disassembly of the half-cylinder 101, a threaded hole 2 is provided on the limit plate 202 for pulling the limit plate 202 after the bolt is installed. When the spliced ​​sampling cylinder needs to be disassembled, the bolt can be screwed into the threaded hole 2, and the bolt can be pulled to pull the limit plate 202 out of the limit hole, so that the plug plate 201 can be pulled out from the inside of the slot, and the connection between the two half-cylinders 101 can be released, so that the spliced ​​sampling cylinder can be disassembled into two semi-long cylinders, and the soil sample in the spliced ​​sampling cylinder can be taken out for testing.

[0063] like Figures 1 to 3As shown, the driving mechanism is used to drive the spliced ​​sampling tube to descend successively, and the driving mechanism includes a lifting platform 301, a driving screw 302, a movable plate 303 and a driving plate 304. A return spring 305 is arranged between the lifting platform 301 and the frame 1, and the lifting platform 301 and the frame 1 are in sliding cooperation. A plurality of sliding bars 306 are arranged at the bottom of the lifting platform 301, and the sliding bars 306 and the lifting platform 301 are in sliding cooperation. The driving screw 302 is rotatably arranged on the lifting platform 301, and a motor 307 is arranged on the lifting platform 301. The driving screw 302 is arranged at the output end of the motor 307. There are two movable plates 303, and the movable plates 303 are movably arranged on the frame 1. A slide groove is provided on the frame 1, and the movable plates 303 are slidably arranged inside the slide groove. A threaded hole 2 matching the driving screw 302 is provided on the side where the two movable plates 303 are close to each other. 04 rotation is set at the bottom of the driving screw 302, the driving plate 304 and the frame 1 are in sliding cooperation, and a limit rod 308 is set on the top of the driving plate 304, and the limit rod 308 and the frame 1 are in sliding cooperation. The motor 307 can drive the driving screw 302 to rotate. Through the threaded cooperation of the driving screw 302 and the movable plate 303, the driving screw 302 can drive the motor 307 and the lifting platform 301 to descend, thereby driving the driving plate 304 to descend, and pushing the spliced ​​sampling tube to descend for drilling sampling. When the two movable plates 303 move away from each other, the limit on the driving screw 302 is released, and the lifting platform 301 returns to its original position under the action of the reset spring 305, driving the driving screw 302 to rise, or the motor 307 can be controlled to reverse, driving the driving screw 302, the motor 307 and the lifting platform 301 to rise, and the subsequent spliced ​​sampling tubes can be added.

[0064] like Figures 4 to 5As shown, the splicing mechanism is used to splice the semi-cylinder 101, and the splicing mechanism includes a storage box 401, a push rod 402, a feeding box 403 and a push plate 404. Two storage boxes 401 are provided, and the storage boxes 401 are arranged on the frame 1. The two storage boxes 401 are located on both sides of the driving mechanism. The semi-cylinder 101 is placed inside the storage box 401. The storage box 401 is provided with a drop opening. The push rod 402 is slidably arranged on the storage box 401. , used to push the semi-cylinder 101 to move to the blanking port, the feeding box 403 is arranged below the storage box 401, and the semi-cylinder 101 falls into the feeding box 403 from the blanking port. The push plate 404 is movably arranged on the feeding box 403, and is used to push the semi-cylinder 101 to the driving mechanism. The feeding box 403 is provided with an electric cylinder 405, and the push plate 404 is arranged at the output end of the electric cylinder 405. When the semi-cylinder 101 needs to be spliced, the push plate 404 is arranged on the output end of the electric cylinder 405. The movable push rod 402 moves the semi-cylinder 101 to the drop opening, and the semi-cylinder 101 falls into the interior of the feeding box 403 through the drop opening. The two electric cylinders 405 drive the push plates 404 to push the two semi-cylinders 101 closer to each other, so that the two semi-cylinders 101 are connected. The storage box 401 and the feeding box 403 are both adapted to the width of the semi-cylinder 101, so that the semi-cylinder 101 is in a stable state during the movement. At the same time, the push rod 402 can be pulled to put a new semi-cylinder 101 into the storage box 401. The semi-cylinder 101 can be added freely, so that the height of the spliced ​​sampling tube can be freely adjusted. The spliced ​​sampling tube is in contact with the feeding box 403 and can be supported during the movement of the semi-cylinder 101. After the two semi-cylinders 101 are spliced, they can fall along the gap between the two feeding boxes 403. At the same time, the feeding box 403 can support and limit the spliced ​​sampling tube to ensure the stability of its drilling.

[0065] like Figures 4 to 5 As shown, in order to reduce the shaking of the semi-cylinder 101 in the storage box 401, a limiting component is also included, which is used to limit the semi-cylinder 101 in the storage box 401. The limiting component includes a baffle 501, a support frame 502 is provided on the storage box 401, and the baffle 501 can be rotatably arranged on the support frame 502. A compression spring 503 is provided between the baffle 501 and the support frame 502. The baffle 501 contacts the semi-cylinder 101 on the side close to the blanking port, and the baffle 501 is pressed against the baffle 501 under the action of the compression spring 503. The semi-cylinder 101 is tightly limited on its surface to prevent subsequent semi-cylinders 101 from entering the blanking port. When the push rod 402 pushes multiple semi-cylinders 101 to move, the baffle 501 can be rotated to compress the compression spring 503, and one semi-cylinder 101 is pushed to the blanking port and falls. At the same time, the baffle 501 loses the pushing effect of the semi-cylinder 101, and rotates to a vertical state under the action of the compression spring 503, blocking subsequent semi-cylinders 101, thereby ensuring the stability of the semi-cylinders 101 in the storage box 401.

[0066] like Figure 6 As shown, in order to facilitate drilling into the soil, it also includes a drill bit 3, a plurality of cutting teeth 4 are arranged at the bottom of the drill bit 3, and a plurality of plug rods 102 are arranged at the top of the drill bit 3 for inserting into the inside of the insertion hole on the semi-cylinder 101. The two semi-cylinders 101 are spliced ​​into a cylindrical shape, and the plug rods 102 on the drill bit 3 are inserted into the inside of the slot, so that the drill bit 3 and the spliced ​​sampling tube can be connected. The cutting teeth 4 are used to cut the ground, thereby facilitating the descent sampling of the spliced ​​sampling tube.

[0067] like Figure 6 and Figure 7 As shown, in order to improve the connection stability between the upper and lower adjacent half-cylinders 101, between the half-cylinder 101 and the driving plate 304, and between the half-cylinder 101 and the drill bit 3, magnets 5 are provided at the top and bottom ends of the half-cylinder 101 and the top of the drill bit 3, and the upper part of the magnet 5 is an N pole. When the drill bit 3 and the spliced ​​sampling tube are connected, the insertion rod 102 is inserted into the inside of the jack, and at the same time, the two magnets 5 attract each other, and the ends of the two magnets 5 that are close to each other have opposite magnetic properties, thereby ensuring the connection stability between the drill bit 3 and the spliced ​​sampling tube. At the same time, the two adjacent spliced ​​sampling tubes are in contact with each other, and the insertion rod 102 is inserted into the inside of the slot. Under the action of the magnet 5, the two spliced ​​sampling tubes are stably connected.

[0068] like Figure 8As shown, in order to realize the synchronous movement of the moving plate 303 and the semi-cylinder 101, the push plate 404 and the moving plate 303 are connected through a transmission assembly, and the transmission assembly includes a transmission gear 601, a driving rack 602 and a driven rack 603. The transmission gear 601 is rotatably set on the frame 1, the driving rack 602 is connected to the push plate 404 through a connecting frame 1 604, and the driven rack 603 is connected to the moving plate 303 through a connecting frame 2 605. The driving rack 602 and the driven rack 603 are centrally symmetrical with respect to the transmission gear 601, and the driving rack 602 and the driven rack 603 are both meshed with the transmission gear 601. When the two half cylinders 101 are connected, the electric cylinder 405 pushes the push plate 404 to move, so that the half cylinder 101 is close to the driving mechanism, and the push plate 404 drives the connecting frame 1 604 and the driving rack 602 to move, and under the action of the transmission gear 601, drives the driven rack 603 to move in the opposite direction, that is, away from the driving mechanism, that is, away from the driving screw 302, drives the connecting frame 2 605 and the moving plate 303 away from the driving screw 302, thereby releasing the connection between the moving plate 303 and the driving screw 302, and under the action of the reset spring 305, the lifting platform 301 and the driving screw 302 rise. , to prepare for the next drive to splice the sampling cylinder. When the splicing is completed, the spliced ​​sampling cylinder falls and connects with the previous spliced ​​sampling cylinder. The electric cylinder 405 drives the push plate 404 away from the spliced ​​sampling cylinder, driving the two moving plates 303 to approach each other. In order to facilitate the threaded cooperation between the driving screw 302 and the moving plate 303 after it rises, a clamping spring 503 and a telescopic rod are arranged between the moving plate 303 and the connecting frame 2 605. A chamfer is arranged above the threaded hole 2. When the two moving plates 303 approach each other, the two moving plates 303 are brought close to each other under the action of the clamping spring 503. The lower part of the driving screw 302 is provided with a A small section of smooth rod is provided. When the lifting platform 301 rises to the highest point under the action of the return spring 305, the bottom end thread of the driving screw 302 is located above the threaded hole 2 of the moving plate 303, and the motor 307 drives the driving screw 302 to rotate. If the driving screw 302 does not correspond to the threaded hole 2, the moving plate 303 will move slightly during the rotation of the driving screw 302. When the driving screw 302 rotates to correspond to the position of the threaded hole 2, the moving plates 303 are pressed against each other under the action of the clamping spring 503, and the driving screw 302 continues to rotate, which will cause the driving screw 302 and the lifting platform 301 to descend.

[0069] It should be noted that the sliding damping between the socket on the drive plate 304 and the insertion rod 102 is relatively small. At the same time, when the spliced ​​sampling tube descends to the ground, the soil exerts a certain damping on it. When the drive plate 304 rises, the drive plate 304 can be smoothly separated from the spliced ​​sampling tube. At the same time, the outside of the socket is provided with chamfers to facilitate the insertion of the insertion rod 102.

[0070] After drilling to the required depth, the push plate 404 approaches the spliced ​​sampling barrel, causing the movable plates 303 to move away from each other. The driving screw 302 drives the driving plate 304 to rise and separate from the spliced ​​sampling barrel. The frame 1 is removed, and the spliced ​​sampling barrel can be taken out from the ground. The continuous soil samples are located inside the spliced ​​sampling barrel. The spliced ​​sampling barrel is separated, and the soil samples inside it can be taken out for testing.

[0071] Embodiment 2: This embodiment also proposes a geotechnical investigation stratified sampling method, using the above-mentioned geotechnical investigation stratified sampling device, comprising the following steps:

[0072] S1, the lifting platform 301 is in the highest position, and the two push rods 402 are pushed to push the two half cylinders 101 to the blanking port, and the half cylinders 101 fall into the feeding box 403, and the two push plates 404 push the two half cylinders 101 at the same time, and the two half cylinders 101 are close to each other, and the plug plate 201 enters the inside of the slot to push the limit plate 202 out, and when the two half cylinders 101 are close to each other, the limit plate 202 is inserted into the inside of the limit hole under the action of the limit spring 203 to limit the plug plate 201, and the two half cylinders 101 are spliced ​​into a cylinder, and the plug rod 102 at the top of the drill bit 3 is inserted into the slot of the cylinder, and the drill bit 3 and the spliced ​​sampling cylinder are connected under the action of the magnet 5;

[0073] S2, the push plate 404 is away from the semi-cylinder 101, and under the driving action of the driving rack 602, the transmission gear 601 and the driven rack 603, the two movable plates 303 are brought close to each other, the driving screw 302 is rotated, and the lifting platform 301 and the driving plate 304 are driven to descend, and the insertion rod 102 of the spliced ​​sampling cylinder is inserted into the jack on the driving plate 304 to connect the spliced ​​sampling cylinder and the driving plate 304, and then the driving screw 302 continues to rotate, driving the spliced ​​sampling cylinder and the drill bit 3 to descend to drill holes;

[0074] S3. During the drilling process, the soil enters the interior of the spliced ​​sampling cylinder. After descending the height of one half cylinder 101, the push rod 402 is pushed to push the half cylinder 101 down to the interior of the feeding box 403. The push plate 404 pushes the half cylinder 101 toward the driving mechanism. At the same time, the two movable plates 303 move away from each other. The driving screw 302 rises to the original position under the action of the reset spring 305. The driving plate 304 and the spliced ​​sampling cylinder are separated. The two half cylinders 101 approach each other to complete the splicing. Under the action of gravity, the spliced ​​sampling cylinder is lowered a certain distance and connected to the spliced ​​sampling cylinder below. Then the push plate 404 moves away from the half cylinder 101, and the two movable plates 303 approach each other. The driving screw 302 rotates, and the driving plate 304 descends, driving the new spliced ​​sampling cylinder to descend and continue sampling.

[0075] S4. After descending to the required depth, the push plate 404 approaches the driving mechanism, driving the screw rod 302 to rise, and the spliced ​​sampling tube is taken out from under the ground. The soil sample located inside the spliced ​​sampling tube is taken out, and the bolt is screwed into the threaded hole 2 on the limit plate 202. The bolt is pulled to release the limit of the limit plate 202 on the plug plate 201, and the semi-cylinder 101 is disassembled to take out the soil sample.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A geotechnical investigation layer sampling device, comprising a frame (1), characterized in that: Also includes: The spliced ​​sampling tube is a spliced ​​structure, and the spliced ​​sampling tube includes: A half-cylinder (101), wherein a plurality of the half-cylinders (101) are provided, and two of the half-cylinders (101) can be spliced ​​together to form a cylindrical shape; A connecting piece, the connecting piece is arranged on the semi-cylinder (101) and is used to connect the two semi-cylinders (101); An insertion rod (102), wherein the insertion rod (102) is arranged at the top end of the semi-cylinder (101), and a plug hole matching the insertion rod (102) is provided at the bottom of the semi-cylinder (101); A driving mechanism, the driving mechanism is used to drive the spliced ​​sampling tube to descend successively; A splicing mechanism, the splicing mechanism is used to splice the half cylinder (101), the splicing mechanism comprises: A storage box (401), wherein two storage boxes (401) are provided, and the storage boxes (401) are arranged on the frame (1), and the two storage boxes (401) are located on both sides of the driving mechanism, and the semi-cylinder (101) is placed inside the storage box (401), and a material dropping opening is opened on the storage box (401); A push rod (402), the push rod (402) being slidably disposed on the storage box (401) and being used for pushing the semi-cylinder (101) to move to the material drop opening; A feeding box (403), wherein the feeding box (403) is arranged below the storage box (401), and the semi-cylinder (101) falls into the interior of the feeding box (403) from the drop opening; A push plate (404), wherein the push plate (404) is movably disposed on the feeding box (403) and is used to push the semi-cylinder (101) toward the driving mechanism.

2. The geotechnical investigation layer sampling equipment according to claim 1, characterized in that: The connecting piece comprises: A plugging plate (201), wherein a plurality of the plugging plates (201) are provided, and the plugging plates (201) are provided on one side of the semi-cylinder (101), and the semi-cylinder (101) is provided with a plurality of slots matching the plugging plates (201); A limit plate (202), a limit slot is provided on the plug plate (201), the limit slot is communicated with the slot, the limit plate (202) is arranged inside the limit slot via a limit spring (203) and a telescopic rod, and a limit hole matching the limit plate (202) is provided on the plug plate (201).

3. The geotechnical investigation layer sampling equipment according to claim 2, characterized in that: The driving mechanism comprises: A lifting platform (301), a return spring (305) is provided between the lifting platform (301) and the frame (1), and the lifting platform (301) and the frame (1) are in sliding cooperation; A driving screw (302), wherein the driving screw (302) is rotatably disposed on the lifting platform (301); A movable plate (303), wherein two movable plates (303) are provided, and the movable plates (303) are movably provided on the frame (1), and a threaded hole (2) matching the driving screw rod (302) is provided on one side of the two movable plates (303) close to each other; A driving plate (304) is rotatably arranged at the bottom of the driving screw rod (302), the driving plate (304) and the frame (1) are in sliding cooperation, and a socket matching the insertion rod (102) is provided at the bottom of the driving plate (304).

4. The geotechnical investigation layer sampling equipment according to claim 3, characterized in that: It also includes a limiting component, which is used to limit the position of the semi-cylinder (101) in the storage box (401), and the limiting component includes: A baffle (501) is provided on the storage box (401) with a support frame (502), the baffle (501) is rotatably provided on the support frame (502), a compression spring (503) is provided between the baffle (501) and the support frame (502), and the baffle (501) is in contact with the semi-cylinder (101) on one side close to the blanking port.

5. The geotechnical investigation layer sampling equipment according to claim 4, characterized in that: It also comprises a drill bit (3), the bottom of which is provided with a plurality of cutting teeth (4), and the top of which is provided with a plurality of insertion rods (102) for inserting into the insertion holes on the semi-cylinder (101).

6. The geotechnical investigation layer sampling equipment according to claim 5, characterized in that: The top and bottom ends of the semi-cylinder (101) and the top end of the drill bit (3) are both provided with magnets (5), and the upper side of the magnets (5) is an N pole.

7. The geotechnical investigation layer sampling equipment according to claim 6, characterized in that: The push plate (404) and the moving plate (303) are connected to each other by a transmission assembly, and the transmission assembly includes: A transmission gear (601), the transmission gear (601) being rotatably disposed on the frame (1); A driving rack (602) and a driven rack (603), wherein the driving rack (602) is connected to the push plate (404) via a connecting frame 1 (604), and the driven rack (603) is connected to the movable plate (303) via a connecting frame 2 (605). The driving rack (602) and the driven rack (603) are centrally symmetrical with respect to the transmission gear (601), and both the driving rack (602) and the driven rack (603) are meshed with the transmission gear (601).

8. The geotechnical investigation layer sampling equipment according to claim 7, characterized in that: The limiting plate (202) is provided with a threaded hole (2) for pulling the limiting plate (202) after the bolts are installed.

9. The geotechnical investigation layer sampling equipment according to claim 8, characterized in that: A compression spring (503) and a telescopic rod are arranged between the movable plate (303) and the second connecting frame (605), and a chamfer is arranged above the threaded hole (2).

10. A geotechnical investigation stratified sampling method, using the geotechnical investigation stratified sampling device according to claim 9, characterized in that: The following steps are involved: S1, the lifting platform (301) is in the highest position, and the two push rods (402) are pushed to push the two half cylinders (101) to the drop opening, and the half cylinders (101) fall into the feeding box (403), and the two push plates (404) push the two half cylinders (101) at the same time, and the two half cylinders (101) are close to each other, and the plug plate (201) enters the inside of the slot to push out the limit plate (202), and when the two half cylinders (101) are close to each other, the limit plate (202) is inserted into the inside of the limit hole under the action of the limit spring (203) to limit the plug plate (201), and the two half cylinders (101) are spliced ​​into a cylinder, and the plug rod (102) at the top of the drill bit (3) is inserted into the inside of the slot of the cylinder, and the drill bit (3) and the spliced ​​sampling cylinder are connected under the action of the magnet (5); S2, the push plate (404) moves away from the semi-cylinder (101), and under the driving action of the driving rack (602), the transmission gear (601) and the driven rack (603), the two movable plates (303) are moved closer to each other, the driving screw (302) is rotated, and the lifting platform (301) and the driving plate (304) are driven to descend, the insertion rod (102) of the spliced ​​sampling tube is inserted into the jack on the driving plate (304), the spliced ​​sampling tube and the driving plate (304) are connected, and then the driving screw (302) continues to rotate, driving the spliced ​​sampling tube and the drill bit (3) to descend to drill a hole; S3. During the drilling process, the soil enters the interior of the spliced ​​sampling barrel. After descending the height of one half-barrel (101), the push rod (402) is pushed to push the half-barrel (101) into the interior of the feeding box (403). The push plate (404) pushes the half-barrel (101) toward the driving mechanism. At the same time, the two movable plates (303) move away from each other. The driving screw (302) rises to its original position under the action of the return spring (305). The driving plate (304) and the spliced ​​sampling barrel are separated. The two half-barrels (101) approach each other to complete the splicing. Under the action of gravity, the spliced ​​sampling barrel descends a certain distance and connects with the spliced ​​sampling barrel below. Then the push plate (404) moves away from the half-barrel (101). The two movable plates (303) approach each other. The driving screw (302) rotates, and the driving plate (304) descends, driving the new spliced ​​sampling barrel to descend and continue sampling. S4. After descending to the required depth, the push plate (404) approaches the driving mechanism, driving the screw rod (302) to rise, and taking out the spliced ​​sampling tube from under the ground. The soil sample located inside the spliced ​​sampling tube is taken out, and the bolt is screwed into the threaded hole (2) on the limit plate (202). The bolt is pulled to release the limit of the limit plate (202) on the plug plate (201), and the semi-cylinder (101) is disassembled to take out the soil sample.

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