29 results about "Soil core" patented technology

The invention relates to the technical field of sampling, in particular to a soil stratified sampling device which comprises a drill rod, a storage container and a rotor wing, the drill rod can rotate around the axis of the drill rod, the storage container is embedded in the drill rod, the rotor wing is rotationally arranged on the drill rod, and a sampling channel capable of being communicated with the storage container is formed in the side, away from the rotating point of the rotor wing, of the rotor wing. In the sampling state, the rotor wings are rotationally screwed out from the interior of the drill rod, so that the sampling channel is communicated with the storage container, and in the drilling state, the rotor wings are rotationally screwed into the drill rod. The rotary wing is arranged, after the rotary wing is rotationally screwed out of the interior of the drill rod, the sampling channel on the rotary wing is located in the target soil layer and located at the position far away from the drill rod, and at the moment, soil around the sampling channel is not prone to being squeezed by the drill rod from top to bottom, so that upper-layer soil and lower-layer soil are not prone to being staggered; therefore, the soil sampling accuracy of the sampler is improved.

The utility model relates to the technical field of forestry, in particular to a seedling lifting mechanism for seedlings, which comprises a seedling lifting cylinder, the bottom of the seedling lifting cylinder is hinged with a plurality of moving parts used for closing the bottom opening of the seedling lifting cylinder, the seedling lifting cylinder is of a polygonal structure, the number of the moving parts is the same as that of the edges of the seedling lifting cylinder, and adjusting components are arranged at positions, corresponding to the moving parts, of the seedling lifting cylinder. A first grip is fixedly mounted on one side of the top of the seedling lifting cylinder; a driving assembly for controlling the plurality of adjusting assemblies to synchronously run is arranged on one side, close to the first grip, of the seedling lifting cylinder; by arranging the movable parts, the adjusting assembly and the driving assembly, on one hand, soil around the roots of seedlings can be loosened through vibration of the movable parts, so that the seedling lifting process is easier, on the other hand, the multiple movable parts can be closed together, the seedlings and soil core columns are sealed in the seedling lifting cylinder, and it is ensured that in the seedling lifting process, the seedling lifting efficiency is improved. The soil stem around the root of the seedling is kept complete, so that possible damage to the root system of the seedling during direct seedling pulling is avoided.

The invention relates to the technical field of irrigation and water conservancy engineering, and discloses a karst mountainous area water retention and stabilization zoned ridge construction method and a ridge, and the method comprises the following steps: S1, digging a foundation trench along a ridge line of a pre-built upper terrace; s2, a load-bearing outer slope body surrounding the upper terrace is built in the foundation trench, and a through drainage hole is formed in at least one lateral section of the load-bearing outer slope body; s3, laying an inverted filter layer on the inner side of the bearing outer slope body; s4, the inner side of the inverted filter layer is filled and tamped with clayed soil in a layered mode, and an anti-seepage soil core wall is formed; s5, the bottom of the foundation trench in the area defined by the anti-seepage soil core wall is backfilled with planting soil; according to the construction method of the zoned ridge for water retention and stabilization in the karst mountainous area and the ridge, the series of problems that the ridge in the karst mountainous area cannot be stabilized, cannot be stored and cannot be drained smoothly are solved, and structural stability, efficient moisture retention and smooth drainage of the ridge in the karst mountainous area under complex hydrogeological conditions are achieved.

The soil stratified sampling device comprises a tunneling barrel, a plurality of spiral grooves are formed in the side wall of the tunneling barrel at intervals, sampling barrels in threaded connection with the spiral grooves are installed in the spiral grooves, a connecting sleeve is fixedly arranged at the inner side end of each sampling barrel, a turbine shaft is assembled on the connecting sleeve in a sliding mode, and a plurality of spiral grooves are formed in the spiral grooves. Rotation limiting is achieved between the turbine shaft and the connecting sleeve through a key, a limiting groove assembled with the key in a sliding mode is formed in the side wall of the connecting sleeve, and a turbine is fixedly installed on the turbine shaft. A rotating shaft is rotationally installed in the middle of the tunneling barrel, and worm sections in meshing transmission with the turbines are arranged at the positions, corresponding to the turbines, of the rotating shaft. By adopting the soil stratified sampling device provided by the invention, the sampling convenience and efficiency are improved.

The application relates to the field of sampling technology, in particular to a layered soil sampling device, which comprises a drill rod, a storage container and a rotor, the drill rod can rotate around its axis, the storage container is embedded in the drill rod, the rotor is rotationally arranged on the drill rod, a sampling channel capable of communicating with the storage container is arranged on the side of the rotor away from the rotation point, in the sampling state, the rotor rotates out of the drill rod to make the sampling channel communicate with the storage container, and in the drilling state, the rotor rotates into the drill rod. The rotor is arranged, after the rotor rotates out of the drill rod, the sampling channel on the rotor is located in the target soil layer and away from the drill rod, at this time, the soil around the sampling channel is not easy to be extruded from top to bottom by the drill rod to cause the upper and lower layers of soil to be dislocated, so that the soil sampling accuracy of the sampler is improved.

The invention discloses a carbon library optimized mixed soil conditioner for loess plateau orchards and application. The carbon library optimized mixed soil conditioner is prepared from the following components in parts by mass: 220 to 230 kg.ha-1 of urea, 130 to 140 kg.ha-1 of calcium superphosphate, 130 to 140 kg.ha-1 of potassium sulfate, 20 to 25 t.ha-1 of decomposed sheep manure and 5 to 10 t.ha-1 of apple branch derived biochar. The mass ratio of the decomposed sheep manure to the apple branch derived biochar is (25-35): 1. Through the ternary collaborative innovative design of the chemical fertilizer, the decomposed sheep manure and the apple branch derived biochar, breakthrough optimization of the carbon library function is achieved aiming at the loess plateau orchard soil core pain point, soil organic carbon, microbial biomass carbon, granular organic carbon, mineral combined organic carbon and other key components are synchronously improved, and the soil quality is improved. And the problem of carbon component imbalance of the traditional modifier is thoroughly solved.

The utility model discloses a novel cement-soil cored mixing pile which comprises a positioning pile, a lifting rod, a traction rope, a liquid storage tank, a stirrer and a base. A bottom plate is fixedly connected to the outer wall of one side of the stirring pile body, a limiting plate is fixedly connected to the outer wall of one side of the bottom plate, a steel bar is fixedly connected to the outer wall of one side of the bottom plate, a welding rod is fixedly connected to the outer wall of one side of the steel bar, and a positioning pile is arranged on the outer wall of the other side of the stirring pile body. According to the utility model, the core pile structure is designed, and the precast pile is pressed into the unsolidified cement soil mixing pile, so that the bearing capacity of the mixing pile is effectively increased, the use amount of concrete building materials is saved, the labor cost is reduced, and the construction cost required by engineering is reduced; meanwhile, the stirring and feeding integrated stirrer is designed, the stirrer is matched with the liquid storage tank, the four-spraying and four-stirring process can be effectively achieved, the operation efficiency of the device is effectively improved, the cost needed by the device is further reduced, and integrated control is effectively achieved.

This invention discloses a method for testing the shear strength of the frozen soil-concrete interface in underground excavation and obstacle removal operations. The steps are as follows: S1, pouring concrete test blocks of the same strength as the actual underground continuous wall under the working conditions; S2, placing the concrete test block into one end of a mold box, and filling the other end of the mold box with the same type of core soil as the core layer in the actual working conditions; S3, placing the mold box into a test block curing box, and freezing it at different set temperatures to form frozen soil-concrete samples; S4, placing the frozen soil-concrete samples into a testing machine, applying vertical pressure to the frozen soil-concrete samples, and applying dynamic load in the horizontal direction using a shear actuator; S5, obtaining the test results of the shear strength of the frozen soil-concrete interface at different temperatures, and analyzing the overall stability of the frozen soil in the core layer under dynamic load. This invention solves the technical dilemma of not being able to conduct in-situ shear strength tests on the frozen soil-concrete core layer on-site, reducing the significant risks of underground continuous wall and frozen soil core layer construction during obstacle removal.

The utility model relates to the technical field of pile foundations, in particular to a novel flow-state solidified soil core gravel pile combined structure which comprises a PVC pipe, a flow-state solidified soil core pile layer is arranged on the inner wall of the PVC pipe in a filling mode, a gravel pile layer is arranged on the outer side of the PVC pipe, an external thread boss is fixedly arranged on the outer wall of one end of the PVC pipe, and the PVC pipe is arranged in a steel casing through a supporting assembly and a positioning assembly. The threaded sleeve is rotated to move downwards along the outer threaded boss, the guide rod and the connecting rod are matched to push the cushion table to be clamped with the inner wall of the steel casing, then the position of the threaded sleeve is fixed to ensure that the PVC pipe is located in the center of the steel casing, and the flow-state solidified soil is poured into the PVC pipe to form the flow-state solidified soil core pile. And then sand is filled between the steel casing and the PVC pipe to form a sand-gravel pile, so that the sand-gravel pile forms an integral flow-state solidified soil core sand-gravel pile, and the bearing capacity of a foundation is improved by integrating the physical properties and erosion resistance of the flow-state solidified soil core sand-gravel pile.

The utility model discloses a solidified soil core wall sand gravel dam which comprises a solidified soil diaphragm wall, the solidified soil diaphragm wall is arranged in a bedrock supporting layer, curtain grouting is arranged at the bottom of the solidified soil diaphragm wall, a solidified soil core wall is arranged at the top of the solidified soil diaphragm wall, an upstream transition layer is arranged on the upstream side of the solidified soil core wall, and a downstream transition layer is arranged on the downstream side of the solidified soil core wall. A vertical drainage net is arranged on the downstream side of the downstream transition layer, the outer sides of the solidified soil core wall, the upstream transition layer, the downstream transition layer and the vertical drainage net are jointly filled with a gravel area, a drainage mattress is arranged at the downstream bottom of the gravel area and located at the downstream position of the vertical drainage net, and a drainage prism is arranged at the slope toe of the gravel area and located at the downstream position of the drainage mattress. According to the sand gravel dam with the solidified soil core wall, the problems that in the prior art, only a traditional asphalt concrete core wall and a clay core wall can be built, so that resources are wasted, and the manufacturing cost is high are solved.

The utility model discloses a kind of soil collection soil drill lifting devices, belong to soil sampling equipment technical field, for solving the problem that traditional manual extraction soil drill operation is laborious and easily disturbs soil sample. The device is mainly composed of triangular support, chain hoist and soil drill structure. Triangular support includes connecting structure and three metal foot poles, and the top of three metal foot poles is connected with connecting structure by bolt to constitute stable support;Chain hoist is hung below the connecting structure, provides mechanical lifting force;Soil drill structure bottom end detachably installs soil drill head, and the hook of chain hoist of soil drill structure adopts detachable connection mode. When using, triangular support is fixed on sampling point ground, and soil drill is inserted into soil layer, and labor-saving lifting is realized by chain hoist chain operation after soil drill. The device is suitable for sample collection operation of farmland deep soil or high compactness soil layer, and can effectively reduce human consumption and keep soil original structure.

The invention belongs to the technical field of drilling sampling, and discloses a stable drilling device with an anti-falling mechanism, the stable drilling device comprises an equipment frame, an inner cavity of the equipment frame is slidably provided with a bearing plate along the vertical direction, the surface of the bearing plate is rotatably provided with a drilling cylinder, and the inner cavity of the equipment frame is provided with a drilling mechanism. The drilling mechanism comprises a lifting assembly and an autorotation assembly, an anti-falling mechanism is arranged in an inner cavity of the drilling barrel and comprises a side wall supporting assembly and a bottom wall cutting assembly, the side wall supporting assembly comprises a clamping rod, a containing part and an adjusting part, and the bottom wall cutting assembly comprises a cutting rope and a guide part. The guide part is arranged to be matched with the drilling barrel, the position of the cutting rope can be conveniently adjusted, the cutting rope can conveniently cut the bottom end of a soil core sample in an inner cavity of the drilling barrel, and the soil core sample is effectively prevented from being connected with soil on the outer side of the drilling barrel.

A soil coring device for hydraulic engineering detection comprises a sampling barrel (1) and a drill rod (2), a fixing column (3) is arranged at the top in the sampling barrel (1), a side groove (4) is formed in the outer wall of the sampling barrel (1), the bottom of the fixing column (3) is located in the side groove (4), an arc-shaped cover plate (5) is arranged in the side groove (4), the upper portion of the arc-shaped cover plate (5) is detachably installed on the fixing column (3) through a bolt, and the drill rod (2) is installed at the top of the sampling barrel (1); the soil sampler has the advantages that if the sampled soil is clamped in the sampling barrel, the arc-shaped cover plate can be opened to loosen and take out the soil sample conveniently. The hard soil can be quickly sampled.

The invention discloses a complex environment near-water double-row soil core steel sheet pile cofferdam and a construction method. The construction method comprises the following steps that firstly, construction preparation and survey setting-out are conducted; secondly, steel pipe piles are driven; thirdly, a guide frame is installed on the driven steel pipe pile; 4, mounting a double-layer steel pipe; fifthly, the steel sheet piles are guided and positioned through the guide frame, the double-layer steel pipe and the steel pipe piles, and the steel sheet piles are driven; sixthly, a waist beam and a connecting part are installed; 7, backfilling the soil material in the middle area of the double-row steel sheet piles to form a soil core, and compacting to ensure the stability; and 8, the guiding system is disassembled. The technical problems that in the complex water-facing environment, double-row steel sheet piles are not accurate in positioning, low in construction efficiency and poor in structural stability are solved, and the method has the advantages of being accurate in positioning, firm in connection and capable of being repeatedly used.

The application discloses a kind of energy storage single piles suitable for deep sea wind power and its construction method, it replaces the part of soil core in the bottom of wind power single pile foundation with energy storage device, process is simple, can greatly reduce engineering cost, can also solve the heat dissipation problem of energy storage device by using the stable temperature environment of ocean underground, can also enhance the soil plug effect of single pile, increase the overall quality and movement damping of single pile, realize the promotion of vertical, horizontal bearing capacity and vibration reduction of foundation Energy consumption.

This invention discloses a method for the fully enclosed continuous construction of the core wall area of ​​a gravel-soil core rockfill dam. The method includes arranging an inflatable canopy above the core wall area of ​​the gravel-soil core rockfill dam, fixing the edges of the inflatable canopy to the banks, upstream rockfill areas, and downstream rockfill areas, ensuring that at least the core wall filling area is within the covered area of ​​the inflatable canopy, and sealing the edges of the inflatable canopy; using an air supply device to supply air into the inflatable canopy, making the pressure inside the inflatable canopy greater than the external pressure, thus supporting the inflatable canopy and forming a closed construction space. The height of the closed construction space is greater than the predetermined height of the core wall of the gravel-soil core rockfill dam for this phase of construction. This invention uses a base fabric to construct the inflatable canopy and arranges a steel cable net on top, covering and enclosing the core wall filling area on the banks and upstream and downstream rockfill areas. The air supply device supplies air to the inside of the inflatable canopy, creating a closed space that provides shelter from wind and rain and insulation, allowing for normal construction even in winter and the rainy season, achieving continuous and safe construction throughout the year.

The invention discloses a piling assembly which comprises a drilling cylinder, a deslagging rod located in the drilling cylinder, a drill bit formed at the bottom end of the deslagging rod and a spiral blade arranged on the outer wall of the deslagging rod, and the drilling cylinder is provided with a soil core containing section not occupied by the spiral blade. An air exhaust channel for forming an air exhaust hole in the bottom end of the drill bit and an air injection channel for forming a plurality of air injection holes in the peripheral wall of the drill bit are arranged in the slag discharge rod; the drilling cylinder is driven to rotate, so that the bottom end of the drilling cylinder is drilled out of a pile hole, and a soil core enters the soil core accommodating section; the deslagging rod is configured to be driven to rotate so that the drill bit can break the soil core, the air suction hole sucks in part of soil slag, the air spraying hole sprays high-pressure air in the circumferential direction so as to loosen the soil core, and the spiral blade can continuously discharge the loosened soil core upwards. The invention further discloses a walking type pile driver. The device has the beneficial effect that the overall efficiency of piling and drilling is improved.

This invention discloses a soft soil geological exploration device and method, including a top plate with two semi-cylinders rotatably connected to it. The two semi-cylinders can rotate towards each other and merge to form a complete sampling cylinder, or rotate in opposite directions to open. A pressing component is provided on the inner wall of the semi-cylinders, an adjusting component is provided on the top plate, and a locking component is provided between the two semi-cylinders. Through the rotatable semi-cylinder structure, the two semi-cylinders can be rotated to the sides in opposite directions, allowing operators to directly and unobstructedly extract a complete columnar soil core, greatly simplifying the core extraction operation. At the same time, after sampling and before core extraction, the soil core is actively and uniformly compacted and reinforced circumferentially, which can re-compact loose soil particles, enabling the soil core to form a columnar body with a certain strength and integrity in a short time, thereby significantly improving the sampling success rate and core forming quality of easily disturbed and loose soil layers.

The invention discloses a double-layer external spiral type soil drilling and sampling device for mineral geological exploration, and relates to the technical field of geological exploration tools. An H-shaped frame is fixedly installed on the back of the bottom frame, an inclined plate is fixedly installed between the top of the bottom frame and the front side wall of the H-shaped frame, two limiting rods are symmetrically and fixedly installed on the side wall of the middle end of the H-shaped frame, a storage table is fixedly installed on the tops of the limiting rods, and a handrail mechanism is arranged on the top of the storage table. A motor program control mechanism penetrates through the surface of the armrest mechanism, and an electric telescopic rod is arranged in the motor program control mechanism. Through the double-layer soil sampling design of the outer drill and the soil sampling drill, the situation that a columnar soil core at the sampling position is prone to being interfered due to the fact that a single-layer drill bit makes contact with the soil layer all the time, soil of the soil layer at the high position of a sample rolls down, the original structure of the sampling soil core is damaged, and soil of soil layers with different depths is mixed is avoided; therefore, the accuracy of soil sample detection data is reduced.

This invention discloses a double-row soil-core steel sheet pile cofferdam and its construction method in complex water-adjacent environments. The construction method is as follows: Step 1, construction preparation and surveying; Step 2, driving steel pipe piles; Step 3, installing guide frames on the driven steel pipe piles; Step 4, installing double-layer steel pipes; Step 5, guiding and positioning the steel sheet piles using the guide frames, double-layer steel pipes, and steel pipe piles, and then driving the steel sheet piles; Step 6, installing the waist beam and connecting components; Step 7, backfilling soil in the middle area of ​​the double-row steel sheet piles to form a soil core, and compacting it to ensure stability; Step 8, disassembling the guide system. This invention solves the technical problems of inaccurate positioning, low construction efficiency, and poor structural stability of double-row steel sheet piles in complex water-adjacent environments, and has the advantages of accurate positioning, firm connection, and reusability.

This invention relates to a method for constructing a mixed-soil pile with a bamboo-like cement-soil core. The method employs a four-mixing-three-spraying process cycle, comprising the following steps: S1, measurement, positioning, and equipment placement; S2, first drilling, one mixing and one spraying—air jetting + water; S3, first lifting, two mixing and two spraying—aerated grouting and hole enlargement; second drilling, three mixing and three spraying—grouting and re-mixing; second lifting, four mixing and three spraying—grouting and final mixing; S6, precast pile implantation: before the cement-soil initially sets, a pile driver is used to implant the precast pile into the formed bamboo-like cement-soil core to form a composite pile. The beneficial effects of this invention are: through the four-mixing-three-spraying process cycle, the pile structure is actively optimized, expanding in hard soil layers and significantly increasing side friction resistance.

The invention belongs to the technical field of civil engineering deep soil body reinforcement and excavation, and particularly discloses a freezing and cracking collaborative deep soil body construction system and method. The construction system comprises a freezing pipe group arranged in a target soil layer and a refrigerant conveying device used for circularly conveying a low-temperature refrigerant to the freezing pipe group, and further comprises a fracturing hole group drilled in the target soil layer and located on the inner side of the freezing pipe group, and a pressure flow conveying device used for conveying high-pressure fluid to the fracturing hole group. After high-pressure fluid is input into the target soil layer through the fracturing hole group, cracks are generated and expanded in the target soil layer; the construction method comprises the steps that the overall temperature of the frozen soil curtain is maintained to be smaller than or equal to-10.0 DEG C, the strength of the frozen soil curtain is monitored, when the strength value reaches 4.0-6.0 MPa, the pressure flow conveying device is started, high-pressure fluid is conveyed to the fracturing hole group, and a frozen soil core area is broken through directional shock waves. According to the invention, rapid reinforcement, low-disturbance excavation and long-term stable control of the deep soil body can be realized.

This invention relates to the field of water conservancy engineering construction technology, specifically to a structure and construction method of a prefabricated soil-core steel sheet pile cofferdam for soft soil foundations. The structure of this application includes: steel sheet piles, integrated tension-compression transverse members, drainage boards, geogrids, and spoil heap cores; the integrated tension-compression transverse members include: transverse members, locking ends, ribbed channel steel, nuts, and double-ended threaded rods; the transverse members include: small-diameter steel pipes, first blind flanges, second blind flanges, grouting bodies, and grouting holes; the locking ends include: locking end steel pipes, third blind flanges, internal threaded sleeves, end plates, grouting bodies, and grouting holes. This application creates dry ground conditions by establishing a prefabricated retaining structure on water, quickly inserting drainage boards at the bottom of the heap to form drainage channels, utilizing spoil as the heap core material, and forming a permanent and temporary integrated structure with the retaining structure during filling, achieving a green, low-carbon, convenient, efficient, and cost-effective structural system.

The invention discloses a pipe cutting device and method for a soil drilling sampling pipe, and belongs to the technical field of geological exploration equipment. The device comprises a base guide rail, a ratchet mechanism, a transmission mechanism and a sectioning mechanism. The pressing rod hinged to the pressing rod support is pressed downwards, the pawl is driven to push the one-way tooth gear to rotate unidirectionally, and then the bevel gear and the cooperation gear drive the puncturing and cutting blade gear to rotate. When the rotating blade pierces into the wall of the sampling tube, the sampling tube is automatically dragged to move forwards along the guide rail by utilizing friction force, so that continuous sectioning is realized. Particularly, the stabbing and cutting blade gears are arranged in a staggered mode, and it is ensured that a complete and continuous sectioning line is formed. Downward pressure is converted into horizontal continuous traction sectioning force, operation is labor-saving, safe and efficient, the technical problems that an existing pipe sectioning mode is labor-consuming, sectioning lines are incomplete, and external fixation is needed are thoroughly solved, and the soil sample collecting quality and efficiency are remarkably improved.

The application discloses a soil sampling device and a sampling method thereof and belongs to the field of soil sampling devices. The soil sampling device comprises a collecting cylinder, the upper end of the collecting cylinder is detachably connected with a transition sleeve, and the upper end of the transition sleeve is provided with a rotating rod for transmitting power. With the continuous downward movement of the pushing rod, the cone body moves downward together with the pipe body, so that a circular channel is opened in the undisturbed soil in the cylinder body. When the cone body reaches the specified depth, the pushing rod is pulled upward again. With the upward movement of the pushing rod, the soil breaking cone and the sampling pipe move upward, the earth block is scraped on the inner wall of the circular channel, the soil on the inner wall of the circular channel falls off and then falls into the pipe body, and when the pipe body is full, the soil cannot enter the pipe body. In this way, the soil can be obtained by controlling the position of the pipe body sinking and then pulling the pushing rod, and the required soil core can be accurately extracted.

The utility model relates to the technical field of soil layer drilling, in particular to a soil layer drilling device for soil investigation. The sampling device has the advantages that the gear motor, the driving gear and the driven gear drive the drilling barrel to rotate and then drill into soil, so that a sample core of a soil layer is drilled into the drilling barrel, sampling is achieved, the drilling barrel rotates and drives the push plate and the transmission screw to rotate at the same time, and sampling is achieved. The push plate is driven to be pulled up through threaded transmission of the transmission screw and the threaded sleeve, so that a soil core continuously enters the drilling barrel, after the soil core is pulled out, the drilling barrel is driven to rotate reversely through the gear motor, the transmission screw pushes the push plate to push the soil core in the drilling barrel slowly, and the purpose of conveniently taking out a sample core is achieved. Through the fixed ground thorns on the bottom surface of the push plate, the center of a circle of a positioning sampling position can be firstly aligned during drilling, so that positioning is facilitated, and the drilling barrel can be effectively positioned and prevented from swinging during drilling of the drilling barrel.

This invention discloses a soil core sampling device for engineering drilling, comprising a drive box, a telescopic rod fixedly connected to the side wall of the drive box, and a drive column fixedly connected to the end of the telescopic rod away from the drive box. The side wall of the drive column has a drive groove and a storage tank. The storage tank is filled with magnetorheological fluid, and a piston is slidably connected within the storage tank. A drive mechanism for moving the piston is installed in the drive groove. A rubber cylinder is fixedly connected to the end of the drive column away from the drive box. This invention utilizes the variable liquid properties of the soft rubber cylinder and the magnetorheological fluid to form a shape that perfectly matches the end face of the core. Then, an electromagnetic plate on the outside is energized, causing the magnetorheological fluid to solidify under a strong magnetic field. The solidified rubber cylinder then pushes out the core, effectively avoiding the concentration of thrust on the narrow contact surface that could lead to core breakage.

The method comprises the following steps: a modular sampling device drives a sampling drill bit carrying a sterile thin-walled sampling cylinder to a preset depth of the ground for penetration through a built-in depth travel encoder and a torque sensor; the collected columnar soil core is divided into independent discrete sample blocks in an in-situ state, and then the discrete sample blocks are sequentially transported to the feed port of a pretreatment module; a weighing sensor at the bottom of a micro processing cavity measures the instantaneous mass of the obtained soil sample, a precision micro pump system extracts a specific volume of sterile nucleic acid protection liquid from a pre-storage liquid tank and injects it into the micro processing cavity, and homogenization treatment is performed; the homogenized soil slurry is filled into a sterile sampling tube with a bar code identification label; and the sealed sterile sampling tube is transferred to a refrigerated storage box for storage. Through cooperation of the modular sampling device and the pretreatment module, the standardization degree of sample processing can be increased, and the repeatability of test data can be improved.