207 results about "Dry soil" patented technology

The invention provides a rapid evaluation method and system for the soil fertility level, and relates to the technical field of soil fertility detection.The rapid evaluation method comprises the steps that an original absorbance spectral data curve is obtained by scanning a soil sample, the moisture peak absorbance, the actual peak position wavelength and the moisture synthetic frequency characteristic peak width are extracted, and a spectral data basis is provided; a water-salt optical path coupling factor is calculated, water-salt correction operation is carried out in combination with a volume correction coefficient, a virtual dry soil spectrum data curve is obtained, interference of salt on a water optical path is quantified, and a water background and salt masking are eliminated; constructing a characteristic virtual baseline of the organic matter and the total nitrogen, calculating an integral area to obtain characteristic intensity of the organic matter and the total nitrogen, and providing a physical input variable for quantitative inversion; introducing a water-salt optical path coupling factor to invert the organic matter content and the total nitrogen content, and correcting signal depression caused by salt stress; the effective fertility index is calculated and graded by combining the organic matter content and the total nitrogen content of the soil, and the actual fertilizer supply capacity of the soil is comprehensively evaluated.

The invention discloses a method for detecting organic carbon components in soil based on gas chromatography-mass spectrometry, and particularly relates to the technical field of soil detection. The method comprises the following steps: pretreating fresh soil to obtain a fresh soil sample and an air-dried soil sample, respectively extracting organic carbon components to obtain a DOC extracting solution and an LOC extracting solution, and sequentially and respectively carrying out purification treatment, concentration treatment and derivatization on the DOC extracting solution and the LOC extracting solution to obtain a DOC to-be-detected solution and an LOC to-be-detected solution; respectively detecting the DOC to-be-detected liquid and the LOC to-be-detected liquid in a GC-MS instrument to obtain a total ion flow chromatogram, and carrying out qualitative and quantitative analysis to obtain organic carbon component data. Through step-by-step extraction, selective derivatization and GC-MS accurate analysis, molecular level separation, identification and quantification of water-soluble organic carbon DOC and oxidizable organic carbon LOC in soil are achieved, the method is particularly suitable for evaluating contribution of carbohydrate, amino acid and organic acid to the carbon turnover rate, and the method is good in selectivity and high in sensitivity.

The invention relates to the technical field of forestry planting, in particular to a water retention and improvement afforestation method for dry soil. The afforestation method comprises the following steps: (1) preparing a soil conditioner; (2) preparing a water retention material; (3) seedling planting and afforestation; and (4) performing conventional management after seedling field planting. When the method is used for afforestation, the afforestation survival rate can be effectively increased.

The invention discloses low-carbon flow-state solidified soil for a seasonal frozen region. The low-carbon flow-state solidified soil comprises soil, a curing agent and water, the dosage of the curing agent is 15-20% of the mass of the dry soil; the water content is 40-60% of the dry mass of the soil and the curing agent; the soil comprises sludge and building residue soil, and the sludge accounts for 20-40 parts by weight, and the building residue soil accounts for 60-80 parts by weight; the curing agent is prepared from the following components in parts by weight: 40 to 60 parts of phosphogypsum, 10 to 15 parts of mixing plant waste slurry, 20 to 40 parts of steel slag, 5 to 10 parts of quick lime, 0.5 to 1.2 parts of glycerol, 0.2 to 0.6 part of hydroxypropyl methyl cellulose and 1 to 1.5 parts of water reducing agent; according to the invention, various technical problems of insufficient anti-freezing performance, unstable fluidity, long setting time, insufficient early strength, large shrinkage deformation, easy generation of segregation and bleeding and the like of the existing fluid-state solidified soil are solved, and meanwhile, more low-carbon environment-friendly raw materials are introduced, so that multi-aspect improvement of the performance of the fluid-state solidified soil and maximization of environment-friendly benefits are realized; and a more reliable and efficient solution is provided for earthwork such as foundation pit backfilling.

A corrosion amount estimation apparatus that estimates the corrosion amount of a metal material buried in the ground, the apparatus including: a soil adjustment unit that dries the target soil; a water permeability measurement unit that measures the water permeability of the soil after supplying water to the dried soil; and a corrosion estimation unit that estimates the corrosion amount of the metal material when buried in the soil using the water permeability.

The invention provides a soil moisture content calculation method based on an optical fiber temperature measurement technology, which comprises the following steps: acquiring a dry soil heat conductivity coefficient, dry soil density and porosity of a target area and a heat conductivity coefficient and density of water in the target area as soil basic parameters; based on an active heating method, obtaining temperature measurement values of the target area under different radial distances after the target area is heated to a steady state; the soil body basic parameters and the temperature measurement value are substituted into a soil body moisture content formula, and the soil body moisture content of the target area is obtained; wherein the soil mass moisture content formula is pre-constructed based on a soil mass steady-state heat conduction equation and the relationship between the heat conduction coefficient and the soil mass basic parameters, and represents the relationship among the heat conduction coefficient of the soil mass, the temperature and the soil mass moisture content. According to the method, the soil moisture content formula representing the relation among the soil basic parameters, the temperature measurement value and the soil moisture content is constructed, and tedious laboratory operation needed by an existing active heating method is simplified.

The invention belongs to the technical field of building construction, and discloses an ultra-deep foundation pit supporting device and a construction method.The supporting device comprises supporting assemblies, a lifting assembly and a control assembly, at least two sets of supporting assemblies are arranged at intervals in the depth direction of a foundation pit, and a multi-stage temporary supporting system is alternately formed in the foundation pit. Each supporting assembly serves as a formwork frame of the concrete support and temporarily supports the concrete support before the concrete support reaches the formwork removal strength, the lower layer supporting assembly provides temporary side wall supporting below the concrete support at the same time, layer-by-layer continuous excavation is achieved, waiting for the concrete strength is not needed, and the construction waiting time is shortened. According to the construction method, the liftable supporting assemblies are adopted for alternate supporting in the dry soil excavation stage and the underwater excavation stage, so that the foundation pit is in smooth transition among different working conditions. Meanwhile, after the dry soil is excavated to a certain depth, water is injected to the height of a confined water head, water pressure inside and outside the pit is balanced, confined water inrush and pit bottom upheaval are effectively prevented, and safe and continuous construction is achieved through dynamic supporting and cyclic utilization.

The invention discloses a soil granularity detection process which comprises the following steps: pouring an air-dried soil sample on a carrier, crushing the air-dried soil sample by using a wood stick, and sieving the crushed air-dried soil sample with the sieving aperture of 2mm to obtain a sieved soil sample; loading the sieved soil sample into a soil particle dispersing device, and physically dispersing the sieved soil sample into particles to obtain a wet soil particle sample; evaporating moisture in the obtained soil particle wet sample to dryness to obtain a soil particle dry sample; adding the obtained soil particle dry sample into a sample pool of a laser particle analyzer, setting parameters of the laser particle analyzer, and measuring the soil particle size in the sample. The method has the advantages of being simple in treatment procedure and convenient to operate, the detection efficiency is high, the whole measurement process consumes less than four hours, more importantly, the soil granularity can be accurately measured, and even acid soil can be smoothly subjected to granularity detection; according to the invention, under the condition of not using any chemical reagent, the bonding force between soil particles is effectively destroyed by using an extremely simple scheme, and the accuracy of a soil particle size measurement result is ensured.

A soil moisture gauge for determining a level of moisture in a plant pot has an elongated main body, which has a lower tip and grooves formed in and along the main body. A graduated scale is formed in the main body over a distance corresponding to a maximum expected soil depth when the gauge is inserted into soil contained in the plant pot. When the gauge is inserted into the plant pot and then pulled out of the plant pot, moist soil is retained in the grooves whereas dry soil falls from the grooves, whereby a user can read moist soil depth on the graduated scale. The reading from the soil moisture gauge can be used as an input to a system to adjust a drying profile that indicates to a user a time by which the plant should be watered.

The invention relates to the technical field of soil detection, and particularly discloses a rapid detection method for residual sodium persulfate in soil, which comprises the following steps: S1, measuring the moisture content of soil; s2, calculating the mass of a soil dry basis according to the water content, adding deionized water into the soil to be detected, uniformly stirring, adding a flocculating agent, and filtering to obtain a soil leachate; s3, taking the soil leachate in the S2, and adding dilute sulfuric acid; s4, adding potassium iodide into the solution in S3, uniformly stirring, and carrying out dark treatment; s5, titrating the solution in S4 with a sodium thiosulfate standard solution, adding a starch indicator when the solution becomes light yellow, ending titration when the solution becomes colorless, and measuring the volume of the consumed sodium thiosulfate standard solution; and S6, calculating the content of sodium persulfate in the to-be-detected soil dry basis. The rapid detection method for residual sodium persulfate in soil provided by the invention can effectively remove humus colloid in the soil leachate, and improves the accuracy and reliability of the detection result.

The invention relates to the technical field of soil sampling devices, in particular to a soil sampling device for water conservancy and hydropower construction. The soil sampling device comprises a moving frame, a limiting frame is arranged at the bottom of the moving frame, a rotating motor is arranged at the top of the moving frame, a first lead screw is arranged at the output end of the rotating motor, a moving seat is arranged on the surface of the first lead screw, and a sampling barrel is arranged at the bottom of the rotating rod. When sampling is stopped, the soil opposite acting force borne by the sealing plate disappears, the sealing plate applies pressure to the surface of the sealing plate, the sealing plate rotates at the two ends of the fixing rod under the pressure until the sealing plate rotates to be perpendicular to the horizontal plane, and the drilled soil enters the sampling barrel from the opening of the sealing plate and the inner wall of the sampling barrel; the sealing plate is reset to seal the end part of the sampling barrel, so that dry soil collected into the sampling barrel is prevented from falling off when the sampling barrel moves, and the collection efficiency is improved.

The invention discloses a method for preparing regenerated planting soil from muck. The method comprises the following steps of feeding and screening, weighing and metering, mixed feeding, primary crushing and mixing, secondary crushing and mixing and finished product discharging. The equipment for preparing the regenerated planting soil from the muck comprises a feeding device, a screening device, a belt conveyor assembly with a scale, a primary crushing and mixing device, a secondary crushing and mixing device and a finished product belt conveyor, the feeding device conveys dry soil, wet soil and humus soil into the screening device, and the screening device conveys the screened dry soil and wet soil to the belt conveyor assembly with the scale; the primary crushing and mixing device receives dry soil, wet soil and humus soil, the dry soil, the wet soil and the humus soil enter the secondary crushing and mixing device after being subjected to primary crushing and mixing, finished planting soil is obtained through crushing and mixing, and the finished planting soil belt conveyor is used for receiving and transporting the finished planting soil output by the secondary crushing and mixing device. The resource utilization rate of the muck is increased, and the stacking of the muck and the pollution to the environment are reduced.

The utility model discloses a sludge treatment production line, which relates to the technical field of sludge treatment and comprises a sludge treatment workshop, a fermentation workshop and a drying and packaging workshop. A sludge pool, a stirring pool, a size mixing tank, a filter press, a crusher, a waste gas treatment device and a wastewater treatment device are arranged in the sludge treatment workshop, the sludge pool, the stirring pool, the size mixing tank, the filter press and the crusher are sequentially connected, the stirring pool is connected with the waste gas treatment device, and the filter press and the sludge pool are respectively connected with the wastewater treatment device; the crusher is connected with the fermentation workshop, and the fermentation workshop is used for fermenting soil powder formed by the crusher; a drying machine and a packaging machine are arranged in the drying and packaging workshop, the drying machine is used for drying the fermented soil powder, and the packaging machine is used for packaging the dried soil powder. The sludge drying device can be used for drying sludge, so that the fuel value in the sludge can be conveniently utilized.

The application belongs to the technical field of cement soil preparation, and particularly relates to a composite cement soil prepared from seawater, nano-silicon dioxide and polyvinyl alcohol fiber and a preparation method thereof, which comprises 63-70% of dry soil powder, 9-10% of Portland cement, 1.8-2.2% of nano-silicon dioxide, 0.6-1.2% of polyvinyl alcohol fiber, 0.2% of dispersant and 16.4-25.4% of seawater. The composite cement soil can not only significantly reduce the dependence on fresh water resources, but also effectively solve the problems of seawater corrosion and deterioration caused by fatigue cracks due to long-term cyclic loading, thereby significantly improving the mechanical strength of the cement soil foundation and prolonging the service life of the cement soil foundation in the coastal environment, and the composite cement soil also has high economic benefits. The synergistic effect of the nano-silicon dioxide and the polyvinyl alcohol fiber significantly enhances the mechanical properties, crack resistance and seawater corrosion resistance of the cement soil, and effectively inhibits the brittle failure of the cement soil, so that the cement soil can be stably applied in the coastal soft soil foundation reinforcement engineering for a long time.

The invention relates to the field of technical analysis and to determining for construction purposes the optimum moisture content and maximum density of natural and man-made soils under static compaction. The essence of the invention consists in compacting a first soil specimen after first determining the initial moisture content thereof and, if necessary, adjusting same by adding water in accordance with recommended values for the given type of soil. A compaction mold cylinder and a lower liner are then placed on 18-20 mm high support stands on a level surface, a weighed amount of the soil under examination is placed in the compaction mold cylinder, the cylinder is positioned on a base plate of a compactor, a top plate of the compactor is brought into contact with the upper end of the cylinder and the compactor is set to a 20 mPA loading mode which is maintained for 5-10 minutes. Loading is ceased, the compaction mold is removed from the compactor, the compacted specimen is extruded and the volume thereof is calculated, the specimen is broken up, a representative sample is taken and weighed on electronic scales with an accuracy of up to 0.01 before being dried and reweighed. On the basis of the data obtained, the damp soil density and the dry soil density are calculated according to given formulae, and the data obtained are entered into a table and noted on a graph. A second soil specimen is compacted, the moisture content of which is increased by 1%, the specimen is placed in the compaction mold, placed under a 20 mPA load in the compactor and held for 5-10 minutes, after which loading is ceased, the compaction mold is removed from the compactor, the compacted specimen is extruded, the volume thereof is calculated, the specimen is broken up, a representative sample is taken and weighed on electronic scales with an accuracy of up to 0.01 before being dried and reweighed, the moisture content of the soil and the dry soil density are calculated and the d

The utility model relates to the technical field of soil treatment and drying, and discloses a drying machine for soil treatment samples, which comprises a drying box, three hot-air blowers are arranged at the top of the drying box, filter screens are arranged at the input ends of the three hot-air blowers, a moving plate is connected to the inside of the drying box in a sliding manner, and a baffle is fixedly mounted on the outer wall of the moving plate. An arrow plate is arranged on the outer wall of the rotating disc, and a plurality of air outlet holes are formed in the outer wall of the drying box. According to the drying machine for the soil treatment sample, when the soil remediation sample needs to be dried, a handle is moved to drive a moving plate to move, soil to be dried is placed on a base plate, an air heater is started, a motor drives a rotating shaft to rotate, a knocking rod is driven to rotate, and a beating rod drives the base plate to move upwards; and the base plate moves downwards, the base plate vibrates, the effect of throwing up the soil through vibration can be achieved, the air heater can dry the soil, and the rapid and uniform drying effect is achieved.

The invention discloses a filtration-increasing composite curing agent and application thereof in a solid-filtration combined technology, and belongs to the technical field of soft soil foundation treatment in civil engineering and traffic transportation engineering. The filtration-increasing composite curing agent is composed of a gelling agent, a retarder and a hydrophobic material, and is added into the sludge for curing the sludge; the sludge comprises sludge dry soil and water, and the water content in the sludge is 70-80%; the doping amount of the gelling agent is 6%-12% of the mass of the sludge, the doping amount of the retarder is 0.05%-0.2% of the mass of the gelling agent, and the doping amount of the hydrophobic material is 0.05%-0.2% of the mass of the dry sludge soil. According to the invention, a solid-filtration combined technology is introduced into sludge treatment, and a composite curing agent with a filtration increasing characteristic is adopted, so that the purposes of further enhancing the vacuum dehydration performance of the solidified soil, improving the solid-filtration treatment effect and reducing the cost can be achieved, and the solid-filtration combined technology is optimized.

The invention relates to the field of soybean planting, in particular to auxiliary equipment for soybean planting, which comprises a vehicle body, a seeder, an H-shaped frame, a plowshare, a lifting assembly, a protective plate, an adjusting assembly and the like, the vehicle body is connected with a seeder; the vehicle body moves by means of a moving assembly of the vehicle body; the vehicle body is slidably connected with an H-shaped frame; the vehicle body is connected with a lifting assembly; a plowshare is fixedly connected to each of two bottom feet of the H-shaped frame; the two bottom feet of the H-shaped frame are each connected with an adjusting assembly. Each adjusting assembly is connected with a protection plate. The slope of the plowshare is arranged in the direction close to the middle of the H-shaped frame, and a protection plate is matched to protect the side edge of a field ridge, so that the problem that dry and hard soil blocks on the surface between the side edge of the field ridge and an excavating part are likely to be extruded by excavating of the existing seeding equipment in a seed ditch excavating process is solved. The problem that the side edge of the field ridge is likely to be dug and collapsed due to the fact that the side edge of the field ridge is influenced and pushed to be away from the digging piece in the direction outside the field ridge is solved.

The invention discloses a soil organic carbon mineralization rate determination method, and relates to the technical field of soil carbon circulation and greenhouse gas monitoring. The method comprises the following steps: carrying out hydrochloric acid back titration on an absorption liquid by adopting an automatic potentiometric titration method, converting to obtain the mass of a carbon element contained in carbon dioxide, calculating the mineralization rate by combining the dry soil weight and the culture interval, and finally subtracting an inactivation control value to obtain the organic carbon mineralization rate driven by pure microorganisms. A thin-wall stainless steel undisturbed soil drill matched with the inner diameter of a culture bottle is used for collecting soil columns in a layered manner, PVC liner tube sealing and constant-temperature transportation are matched, and a cold chamber for simulating the in-situ temperature is combined, so that the in-situ structure and the microbial habitat of the loose high-water-content peat soil are reserved to the maximum extent, and damage of traditional pretreatment to soil pores and microbial communities is avoided.

The invention discloses an intelligent weeding robot for dry soil crops, and relates to the technical field of agricultural intelligent equipment. According to the robot, a solution integrating edge intelligent vision and self-adaptive control is disclosed for the requirements for accuracy and adaptability of weeding operation in a dry soil complex environment. The robot comprises a moving trolley, a weeding device, a weed recognition control module and a power battery, and the control module automatically controls the moving trolley to walk forwards according to a planned path and position information provided by a satellite navigation module and receives dry soil crop and weed photos shot by a camera in real time. The main control unit intelligently recognizes coordinate information of weeds and crops relative to the moving trolley and timely controls the laser weeding device or the mechanical weeding device to efficiently remove the weeds. The problems that a traditional weeding mode is low in efficiency and high in seedling damage rate are solved, and intelligent, environment-friendly and efficient weeding is achieved.

The utility model provides dissolving equipment which comprises a dissolving barrel, one side of the top of the dissolving barrel is connected with a feeding hopper, an electric heating wire is embedded in the barrel wall of the dissolving barrel, a filter cone is arranged on the lower portion of the interior of the dissolving barrel in a sleeved mode, a dissolving cavity is formed in the dissolving barrel and located below the filter cone, and the upper portion of the dissolving barrel is connected with the feeding hopper. A motor is arranged in the dissolving barrel, a filter cone is arranged in the dissolving barrel, a crushing cavity is formed in the dissolving barrel and located above the filter cone, and an electric crushing assembly penetrates through the top of the dissolving barrel. According to the soil detection equipment, the crushing blades, the scraping rods and the stirring rods can be driven to rotate at a high speed, the crushing blades quickly crush dried soil blocks, and meanwhile, the scraping rods rub the inner wall of the dissolving barrel, so that residues of soil samples in the dissolving barrel can be effectively reduced, and the cleaning convenience of the soil detection equipment is improved.

The invention discloses a method and device for detecting carbon and nitrogen elements in fresh soil. The method comprises the steps of pipeline air exhaust, water quantification, low-temperature cracking, medium-temperature oxidation, high-temperature combustion and the like. The device comprises a combustion furnace, a heat exchange tube, an electronic condenser, a dehalogenation device, a flow divider, a collector, a reduction furnace, a carbon adsorption column and a TCD detector. The electronic condenser is used for cooling the vaporized atmosphere in the fresh soil, real-time high-precision quantitative analysis is carried out on the water content, and the content of carbon and nitrogen elements in the fresh soil is converted into the content of carbon and nitrogen in the dry soil through the water content of the soil; the contents of carbon or nitrogen in various forms are distinguished by utilizing staged combustion detection for the first time, the contents of main nutrient elements of carbon and nitrogen in the soil can be rapidly and accurately determined in a field edge site, and compared with determination after air drying of a soil sample, the detection time is greatly saved; the determination result of the method can guide field fertilization, provides a scientific basis for agricultural production, and serves modern agricultural development.

The invention discloses dry soil layer backfilling equipment for widening and transforming a road foundation and a construction method.The dry soil layer backfilling equipment for widening and transforming the road foundation comprises a movable base, a material storage shell is fixedly installed at the top of the movable base, a motor is fixedly installed at the top of the material storage shell, and an output shaft of the motor penetrates through the material storage shell; a stirring rod is fixedly mounted at the bottom end of an output shaft of the motor, a lifting mechanism, a positioning mechanism, an unlocking mechanism and a compaction mechanism are arranged at the top of the movable base, the compaction mechanism is matched with the movable base, the positioning mechanism, the unlocking mechanism and the lifting mechanism, and the compaction mechanism comprises a bearing mounting frame, a compaction roller and a mounting plate; according to the road backfilling and compacting device, soil is added into the inner side of the material storage shell, the motor is started, the motor drives the stirring rod to stir the soil, soil blockage is prevented, the height of the compacting roller is adjusted, backfilling and compacting can be conducted on a road, and the road backfilling and compacting device is rapid and convenient to use.

The application provides an anti-skid forklift pedal, belonging to the technical field of forklift accessories. The anti-skid forklift pedal comprises a standing pedal body, a connecting plate and a soil cleaning assembly. The standing pedal body is provided with longitudinal anti-skid groove, and the standing pedal body between the anti-skid grooves is provided with anti-skid protrusions. The limiting strip plate is fixed on the outer side of the standing pedal body, the pull strip plate is arranged below the limiting strip plate and slides in the anti-skid groove, the horizontal strip plate is connected with the outer end of the pull strip plate, the pull block is arranged on the bottom of the horizontal strip plate, and the end block is arranged above the end of the pull strip plate away from the horizontal strip plate. The dry soil covered above the pull strip plate in the anti-skid groove is separated from the standing pedal body by pulling the limiting strip plate outward to drive the pull strip plate to move along the anti-skid groove, so that the soil on the standing pedal body can be quickly cleaned, and the standing pedal body has good anti-skid effect in the later period.

This invention relates to the field of agricultural environment and soil fertilizer technology, and in particular to a method for increasing paddy field yield and reducing N2O emissions by regulating the application rate of zero-valent iron. The method includes the following steps: at the early tillering stage of rice, zero-valent iron is mixed with tillering fertilizer and applied to the paddy field soil; the application rate of zero-valent iron is 20-50 mg / kg (dry soil basis). ‑1 The method involves applying booting fertilizer to the paddy soil during the early booting stage of rice, and irrigating throughout the entire rice growth cycle. This invention, by applying an appropriate amount of zero-valent iron in a single application on top of conventional fertilizer application, can synergistically achieve greenhouse gas emission reduction and increased grain yield, providing a feasible path for green production in paddy fields.

The utility model relates to the technical field of saline soil moisture content testing, in particular to a testing device for the optimal compaction moisture content of saline soil. The testing device for the optimal compaction moisture content of the salty soil comprises a control device, a batching device, a compaction device and a salt content testing device, and the control device is used for controlling operation of the testing device and acquisition, storage, processing and output of data; the batching device is connected to the control device and is used for preparing a certain mass of dry soil into salinized soil with different salt concentrations; the compaction device is connected to the batching device and the control device and is used for compacting the salinized soil with different salt concentrations at different temperatures, the optimal compaction moisture content of the salinized soil with different salt concentrations at different temperatures is obtained through treatment of the control device, and a database is formed; the salt content testing device is used for detecting the salt content of the to-be-detected saline soil at a certain temperature, and the optimal compaction water content of the to-be-detected saline soil is obtained by comparing the database through the control device.

The invention relates to the technical field of ecological restoration, and particularly discloses a device for improving the water-retaining property of soil, which comprises a placing box and a main body, and further comprises a discharging mechanism arranged in the placing box, and the discharging mechanism adjusts the discharging amount according to the feeding amount; the resistance changing mechanism is arranged on one side of the discharging mechanism, the resistance changing mechanism adjusts the moving speed of the device according to the feeding amount, wet soil enters the collecting box through the discharging mechanism, a second pressure sensor converts the extrusion force into an electric signal and transmits the electric signal to the control device, the control device controls an electromagnetic three-way valve to be opened, and the discharging mechanism is used for discharging the wet soil; after an oil tank is communicated with a first connecting pipe, an electric push rod is started, the electric push rod enables air in a piston pipe to enter the oil tank through an air outlet pipe, the air entering the oil tank pushes a second piston, the second piston pushes hydraulic oil to enter a hydraulic cylinder, and one end of the hydraulic cylinder moves to push a sealing plate to move; and dry soil in the dry soil box is discharged outwards through the discharge port and the dispersion plate.

The invention discloses a method for testing available boron in soil by ultrasonic extraction plasma emission spectrometry, which comprises the following steps: weighing 10.0 g of air-dried soil sample passing through a 60-mesh sieve, adding 20.0 mL of first-grade water (conforming to the GB / T 6682 regulation) into a 100 mL polyethylene centrifuge tube, slightly shaking the polyethylene centrifuge tube to disperse the soil, preferably performing ultrasonic extraction for 20-25 minutes under the conditions of 40 kHz and 70-80 DEG C, and performing ultrasonic extraction for 20-25 minutes under the conditions of 40 kHz and 70-80 DEG C; more preferably, after 22 minutes of extraction is finished, centrifuging for 5 minutes at the speed of 4000 r / min, collecting supernate, putting the supernate into a colorimetric tube to be detected, putting the supernate on a machine, selecting boron of 249.773 nm as an analysis spectral line, and detecting the soil available boron by an inductively coupled plasma emission spectrometry (ICP-OES) method, the mass concentration of the soil available boron is in a range of 0-2.0 mg / L and has a good linear relationship with spectral intensity, the correlation coefficient is 0.9999, the detection limit of the method is 0.003 mg / kg, and the lower measurement limit is 0.012 mg / kg. The relative standard deviation RSD is 2.17%-4.73% (n is equal to 8), the relative error RE is 0.54%-2.10% (n is equal to 8), and detection values are all in an uncertainty range.

The invention relates to the technical field of intelligent construction of tunnel engineering, in particular to an intelligent detection and identification method for flow plasticity types of shield muck. The method comprises the steps that firstly, an industrial camera with environmental adaptability is used for collecting an image of slag at a slag outlet of the shield tunneling machine; then, preprocessing including Retinex illumination enhancement, geometric correction and denoising is carried out on the image; inputting the processed image into a trained YOLOv8-CBAM model for analysis and reasoning, wherein the model enhances the ability of extracting muck textures and key features by embedding a CBAM attention mechanism; the model outputs three types of muck states of dry soil, suitable soil and rare earth and confidence degrees thereof; and finally, performing real-time linkage adjustment on construction parameters such as the injection amount and the propelling speed of the modifier according to an identification result to form intelligent closed-loop control. According to the invention, the accuracy and real-time performance of muck state identification are improved, the dependence on artificial experience is reduced, and the safety, high efficiency and continuity of shield construction are effectively guaranteed.

The invention relates to the technical field of soil sample preparation, in particular to an automatic soil sample preparation system which comprises a drying module, a coarse screening module, a grinding module, a fine screening module, a weighing module and a cleaning and dust collecting module. The drying module is arranged at the right upper part of the whole system and is used for preparing a fresh soil sample into a dry soil sample; the coarse screening module is obliquely arranged below the drying module and is used for primarily grading the dried soil sample and separating impurities; the grinding module is arranged below the coarse screening module and used for crushing the soil particles to the target particle size; the fine screening module is arranged below the grinding module and is used for precisely grading the soil sample; the weighing module is arranged below the fine screening module and is used for quantitatively sub-packaging the soil samples; the cleaning and dust collecting module is arranged on the lower left portion of the system and used for cleaning all the modules and collecting dust. The system can realize automatic preparation of the soil sample, and has the advantages of high efficiency, environmental protection, low cost and the like.