874 results about "Solum" patented technology

The invention discloses a farmland environment multi-parameter intelligent monitoring system and method based on Internet of Things, particularly relates to the technical field of agricultural Internet of Things monitoring, and is used for solving the problem of stress resistance evaluation distortion caused by neglecting crop physiological recovery hysteresis in the prior art. Collecting soil water content data in real time through an Internet of Things sensor, and extracting a soil water content change rate when a preset threshold value is reached; secondly, constructing a space-time gradient matrix based on different soil layer water deficit rates, and generating a stress cumulative intensity index through principal component analysis and information entropy fusion; then analyzing a coupling relationship between the soil moisture change rate and the stress accumulation effect in the historical stress event on physiological recovery delay to generate a recovery delay coefficient; the physiological state lag degree is evaluated by combining the stomatal conductance change rate ratio of the stress period and the recovery period and the recovery delay coefficient; and finally, dynamically prolonging the irrigation execution time according to the lag degree until the irrigation execution time is lower than a set tolerance value, thereby remarkably improving the reliability of crop stress resistance test data.

The invention discloses a high-silt-content working condition screw pump control system and method, and belongs to the technical field of soil layer drilling, and the system comprises a multi-mode sensing module, an intelligent decision and control module, a self-adaptive adjustment execution module and a self-cleaning and anti-blocking module. According to the high-mud-content working condition screw pump control system and method, the operation state and medium characteristic data of the screw pump are accurately collected through the multi-mode sensing module, and early prediction and accurate diagnosis of faults are achieved in combination with an advanced data processing algorithm and a deep learning model in the intelligent decision-making and control module; meanwhile, a self-adaptive adjustment execution module and a self-cleaning and anti-blocking module are utilized to dynamically optimize the rotating speed and the gap of the motor and intelligently clean and prevent blocking, so that full-process closed-loop control is formed; finally, multiple beneficial effects of improving the monitoring accuracy, enhancing the anti-interference capability of the system, reducing the maintenance cost, reducing the non-planned downtime, and improving the operation efficiency and stability are achieved.

The invention discloses a soil groundwater remediation agent injection device and method.The device is arranged in an excavated soil layer hole and comprises a flexible air bag, the flexible air bag further comprises an air bag body, the upper end and the lower end of the air bag body are made of hard materials, and the wall face of the air bag body is made of flexible materials; a pipeline penetrates between the upper end and the lower end in a sealed manner and is used for accommodating a medicine injection pipeline, an inflation pipeline and an air pressure monitoring line; the injector is arranged on the outer side of the flexible wall surface of the air bag body and is communicated with the medicine injection pipeline; the whole injector is arc-shaped or annular, the inner side of the injector is attached to the flexible wall surface, and medicament injection holes are uniformly formed in the outer side of the injector; after the air bag body is inflated and expanded, in the medicament injection process, the injector abuts against the height position of the soil layer to be repaired, and the flexible wall face is tightly attached to the wall face of the hole. According to the device, injection repairing work of the medicament at different depths can be rapidly achieved only by drilling a proper simple hole underground, and recycling of the medicament injection device can be achieved.

The invention relates to the technical field of alpine sand soil moisture leakage estimation technologies, and particularly discloses an alpine sand soil moisture leakage estimation method which comprises the following steps: S1, multi-source data acquisition: acquiring 0-110cm layered soil moisture content and temperature data by using a cold-resistant soil hydrothermal sensor array, and calculating the moisture content and temperature data of the layered soil; synchronously acquiring Sentinel-2 remote sensing data to extract vegetation coverage and land surface temperature, and recording regional freezing and thawing cycle times and biological crust coverage types; s2, key parameter inversion: calculating a permeability coefficient correction factor kFTC = alpha * N (1 / 2) through a multi-expression programming model based on the freezing and thawing cycle number N. According to the method for estimating the soil moisture leakage amount of the high and cold sand land, the limitation of a traditional model based on steady-state water flow and empirical parameters is broken through by quantifying the dynamic effect of freezing and thawing cycles on the porosity of a 30-80 mm soil layer and the water blocking effect of 23.41%-30.39% when the biological crust coverage degree exceeds 30%; and the influence of the low-temperature freezing and thawing cycle and the biological crust on the leakage mechanism of the high and cold sand land is accurately depicted.

A rotary excavating drill bit facilitating soil unloading comprises a rotary excavating drill bit body, the rotary excavating drill bit body comprises a drilling barrel, a horizontally-arranged partition plate is fixed to the upper side of the interior of the drilling barrel, an inner cavity of the drilling barrel is divided into an upper equipment cavity and a lower working cavity through the partition plate, a rotating part is installed in the equipment cavity, and a soil scraping assembly is installed in the working cavity; the rotating part comprises a transmission column and a lower circular plate which are coaxially arranged with the drilling barrel, the transmission column is rotationally connected with the drilling barrel, the top of the transmission column extends out of the drilling barrel, a connecting base connected with a drilling rod of the rotary drilling rig is fixed to the top of the transmission column, the lower circular plate is fixed to the bottom of the transmission column, and a through hole matched with the lower circular plate in size is formed in the middle of the partition plate. The lower circular plate is mounted in the through hole, and the lower circular plate is in sliding connection with the inner wall of the through hole; according to the utility model, scraping cleaning and vibration cleaning can be carried out on a soil layer in the drill cylinder, the residual quantity and adhesion phenomena of soil in the drill cylinder are greatly reduced, and the soil unloading efficiency is obviously improved.

The invention discloses a narrow foundation pit upheaval resistance stability calculation method, which comprises the following steps: acquiring actual length, width and depth dimensions of a foundation pit and a consolidation undrained strength index, cohesion ccu and an internal friction angle phi cu of a field soil layer, and calculating a type critical width according to an improvement formula considering the internal friction angle of soil and a first width calculation coefficient, and whether the foundation pit is the narrow foundation pit or not is determined according to the comparison result of the actual foundation pit width and the type critical width. When the actual foundation pit is determined to be the narrow foundation pit, the width of a sinking soil body on the side face of the foundation pit is reversely solved through an improvement formula considering the internal friction angle of soil and the width of the actual foundation pit, and the upheaval-resistant stability coefficient of the narrow foundation pit based on the foundation bearing capacity mode is calculated and compared with the upheaval-resistant stability coefficient of the arc sliding mode. And taking the smaller value as the anti-upheaval stability coefficient of the narrow foundation pit so as to evaluate the anti-upheaval stability of the pit bottom of the foundation pit. Therefore, the problems that in the related technology, the judgment standard of the narrow foundation pit and selection of the slip plane are unreasonable, preconditions for checking calculation according to the narrow foundation pit design are unknown, and the friction angle in the stratum is not considered are solved.

The invention relates to a shield tunneling machine tunneling parameter adjusting method and system, and relates to the technical field of shield construction, and the method comprises the steps: recording propulsion resistance information in a plurality of past historical moments, obtaining a historical propulsion resistance sequence, carrying out the prediction of propulsion resistance at a plurality of future moments, and obtaining a predicted propulsion resistance sequence; optimizing the propulsive force of the shield tunneling machine in order to improve the propulsive speed and the soil layer stability to obtain optimized propulsive force; carrying out fluctuation analysis on the historical propulsion resistance sequence and the predicted propulsion resistance sequence, calculating to obtain minimum fluctuation propulsion resistance and maximum fluctuation propulsion resistance, respectively carrying out propulsion speed analysis and soil layer stability analysis to obtain minimum propulsion speed and minimum soil layer stability information, and carrying out auxiliary optimization on the optimized propulsion force to obtain the optimal propulsion force. And optimal propulsive force is obtained, and tunneling parameters of the shield tunneling machine are adjusted. The technical effect of improving the shield construction efficiency, stability and safety is achieved.

The invention provides a comprehensive monitoring method and device for vibroflotation pore-forming and a medium, and relates to the technical field of drilling of soil layers, the comprehensive monitoring method comprises the following steps: S1, in a current pore-forming state, detecting whether the pore-forming current of a current vibroflotation device is reduced or not in real time; s2, detecting the continuous state of the pore-forming current in real time from the current descending point to obtain a corresponding abnormal time period; s3, change detection is conducted on the state interval according to the incidence relation between the pore-forming tension and the pore-forming descending depth and the pore-forming current, if it is detected that the state interval is in an abnormal state, a first early warning is given out, and the step S4 is executed; and S4, the current pore-forming allowable maximum time of the current vibroflot is obtained, whether the current time period reaches the current pore-forming allowable maximum time or not is detected in real time from the time point of the current descending point location, if yes, the current pore-forming state is changed into the pore-forming stop state, the winch is controlled to stop, and a second early warning is given out.

The invention discloses a layered foundation construction optimization method based on dynamic loading and intelligent inversion, and relates to the technical field of intelligent geotechnical engineering. In order to solve the problem that comprehensive analysis and optimization design of multiple layers of soil bodies are difficult to carry out in the prior art, the invention provides the following technical scheme: the layered foundation construction optimization method based on dynamic loading and intelligent inversion is characterized by comprising the following steps: S1, applying a dynamic load on a known layer of soil body; s2, acquiring response data, including acceleration, displacement and stress, of the soil body under the action of the dynamic load through a sensor; s3, deducing the dynamic response of the lower-layer soil body by using an inversion algorithm based on the acquired response data; s4, analyzing dynamic response characteristics of each layer of soil body; and S5, optimizing the compactness and the elastic modulus of the soil layer. The method can improve the accuracy and efficiency of soil dynamic response analysis, is suitable for mechanical property optimization in complex foundation engineering, and has wide engineering application value.

The invention provides a data-driven intelligent stirring and quality prediction method, and is suitable for the field of stirring pile construction. According to the method, the data-driven neural network model is established, soil layer parameters, stirring parameters and construction quality are recognized, the state of a stirring machine is monitored in real time, the stirring process is dynamically adjusted, the comprehensive construction efficiency is improved, and the strength of a stirring pile can be predicted according to real-time data such as cement paste and the guniting amount by establishing the quality prediction model; and finally, intelligent construction is achieved, and the engineering quality and safety are improved.

The invention relates to the field of foundation engineering, and discloses a soil mass critical state-based large open caisson soil sampling control method which comprises the following steps: acquiring soil layer distribution and physical and mechanical parameters of the position of an open caisson, establishing an interaction model of an open caisson blade foot and a soil mass, calculating pressure distribution of a blade foot contact area through a finite element method, and calculating the soil mass critical state of the open caisson. Simulating the distribution condition of a soil body plastic zone and carrying out connectivity analysis; designing an open caisson soil taking construction scheme based on the analysis, wherein the scheme comprises a soil taking sequence, a soil taking depth and a plastic zone proportion index; whether the construction scheme meets the safety and stability requirements of open caisson sinking or not is judged through simulation, if the requirements are not met, soil taking parameters are adjusted, verification is conducted again till the requirements are met, accurate design and dynamic adjustment of the open caisson sinking process are achieved through dual control over the plastic zone proportion index and the connectivity index, and the construction efficiency is improved. And the safety, the stability and the reliability of construction are obviously improved.

The invention discloses a cross-medium transmission simulation device and method for pollutants between soil and underground water, and relates to the technical field of environmental governance, and the cross-medium transmission simulation device for pollutants between soil and underground water comprises a soil layer system and an underground water system. The soil layer system comprises a base and a soil box arranged on the base in the vertical direction, the soil box is used for containing test soil, and the base is provided with a first water permeable hole used for being communicated with the soil box. The underground water system comprises a water tank, a mounting opening is formed in the upper side of the water tank and used for allowing the base and the soil box to sequentially penetrate through, and the height of the inner side of the water tank is larger than that of the base so that water in the water tank can penetrate through the first water permeable holes and make contact with a soil layer in the soil box. By comparing the content of the pollutants at the same position, the blocking effect of the blocking agent on the pollutants can be evaluated, and the blocking effect of the blocking agent during cross-medium transmission of the pollutants between the soil and the underground water can be evaluated on the whole.

The invention discloses a single-column soil moisture content testing method, belongs to the technical field of soil moisture content testing, and solves the problem that an existing soil moisture content detection method cannot accurately prevent geological disasters. According to the method, measurement data including measurement impedance modulus and measurement phase in a monitored soil layer are obtained by utilizing multiple groups of measurement electrodes in a soil test column, and an impedance modulus correlation coefficient and a phase correlation coefficient between the measurement data and calibration data are calculated to obtain a comprehensive correlation coefficient; the calibrated soil moisture content distribution soil layer closest to the monitored soil layer is judged at the same time by combining the impedance modulus and the phase, the calibrated experimental soil layer has higher robustness, and even if the environmental condition changes, the strategy can be quickly adjusted by comparing the calibrated data, so that the continuity and stability of monitoring work are ensured, and the accuracy of monitoring is improved. And an expert can conveniently evaluate an accurate geological disaster early warning level.

The invention discloses a foundation treatment method for determining the thickness of a replacement cushion layer of an underground water supply and drainage pipeline. The foundation treatment method comprises the steps that S1, it is determined that a pipeline foundation is a concrete foundation or a gravel foundation; s2, the required foundation bearing capacity is calculated; s3, checking whether the bearing capacity of the uncorrected pipe bottom soil layer foundation meets the design requirement or not, and if yes, carrying out foundation treatment of replacing and filling a cushion layer; if not, foundation treatment of the replacement cushion layer is conducted, and the thickness of the replacement cushion layer is calculated according to the following formula; according to the method, the accuracy and quickness of calculation of the replacement thickness are improved, the working efficiency is improved, unnecessary waste is reduced, the foundation treatment method for determining the foundation bearing capacity needed by pipelines with different pipes, pipe diameters and earthing thicknesses and the thickness of the replacement cushion layer is provided, the needed foundation bearing capacity is determined according to the different pipes, pipe diameters and earthing thicknesses, and the foundation treatment effect is improved. And when a soft soil layer exists at the bottom of the pipe, a foundation treatment method adopting a replacing and filling cushion layer is provided, the requirement for foundation bearing capacity can be met, and safe operation of the pipe is guaranteed.

The invention relates to a high and steep rock slope ecological restoration structure based on a biological solidification technology. The high and steep rock slope ecological restoration structure comprises a rock slope body, anchor rods, a metal net, a square solid containing cavity, a biological solidification coarse-grained soil layer, a vegetation base layer and an n-shaped component. The metal net is flatly laid on the surface of the rock slope body and is fixed on the surface of the rock slope body through a plurality of anchor rods; the plurality of anchor rods are transversely arranged in rows and longitudinally arranged in columns along the rock slope body, and are driven into a stable rock stratum of the rock slope body; the square solid containing cavity is fixedly connected with a rock slope body through an n-shaped component embedded into the rock body. The biological curing coarse-grained soil layer is formed by curing coarse-grained soil which is laid in the square solid containing cavity and contains biological slurry by spraying bean enzyme treatment liquid; the vegetation base layer is sprayed and seeded on the upper surface of the biological curing coarse-grained soil layer. The ecological restoration structure for the high and steep rock slope is good in strength and integrity, convenient and efficient to construct, good in ecological restoration effect and high in ecological stability and continuity.

The invention relates to the technical field of tunnel and underground engineering shield grouting, in particular to a shield muck ecological grouting material based on stratum adaptability and a production process, the ecological grouting material is prepared from shield muck subjected to fineness modulus classification, carbide slag, slag, fly ash and a water reducing agent, according to the technical scheme, the preparation technology of muck crushing, preliminary screening, grinding, fineness screening, hydrolyzed mud adding and grouping mixing and the ecological grouting material for different stratum adaptability are formed, and the prepared ecological grouting material has the dual advantages of being environmentally friendly and considering the stratum adaptability; the ecological grouting material has the advantages of large apparent density, low bleeding rate, high compressive strength, good water-land strength ratio and the like, is mainly applied to shield tunnel wall back grouting of tunnels and underground engineering, and is mainly used for enhancing soil layer stability and guaranteeing safety of ground buildings.

The invention relates to the field of geological exploration equipment, in particular to a geological exploration drilling machine for architectural design. Existing equipment is easy to fracture a soil core sample, and is easy to cause soil layer sequence disorder, so that the detection accuracy is influenced. A geological exploration drilling machine for building design comprises a movable chassis, a rotating frame installed on the movable chassis, a hydraulic push rod fixedly connected to the rotating frame and a lower moving plate fixedly connected to the hydraulic push rod. When the soil sampler is used, the five soil sampling cylinders are pushed to move by the five push rods when the push rod frame moves, the five soil sampling cylinders are pushed out of the soil sampler by the five push rods of the push rod frame, a worker pushes soil cores in the five soil sampling cylinders out of the soil sampling cylinders and sequentially puts the pushed-out soil cores into the storage box, and the soil cores can be taken out in sections, so that the taken-out soil cores are more complete; therefore, the soil core detection is more accurate.

The invention belongs to the field of water and soil loss monitoring, and particularly relates to a monitoring and collecting system and method for simulating karst slope rainfall and water and soil leakage. By arranging the karst slope rainfall simulation device, monitoring and collection of water and soil leakage erosion after rainfall and mastering of water and soil physical and chemical shapes and dynamic change characteristics are achieved. A plurality of soil seams can be sequentially excavated in a staggered mode according to the layer position or the depth from top to bottom along the soil layer section of the karst slope, a winnowing pan type water collecting hopper or a Luoyang shovel type water collecting hopper and a tipping bucket type flow meter connected with the winnowing pan type water collecting hopper or the Luoyang shovel type water collecting hopper are embedded, and the purposes of simultaneous monitoring and sample collection in multiple layer positions, multiple depths and stone seam fractures of the soil layer are achieved. The problem of simultaneous monitoring and collection of karst slope rainfall and underground water and soil leakage is effectively solved.

The present invention relates to the technical field of pile driving equipment, and specifically discloses a pile drilling equipment for foundation construction, comprising: a drill rod, a support system, a power system and a compacting component, wherein the drill rod comprises a rotating shaft, a drill bit and an auger blade, the drill bit is arranged at the bottom end of the rotating shaft, the auger blade is arranged at the peripheral side of the rotating shaft, the support system is used to support the drill rod, the power system is used to provide power for the drill rod, and the compacting component comprises a compacting cylinder and a diverter plate, the compacting cylinder is arranged at the peripheral side of the auger blade, the auger blade forms a spiral channel in the compacting cylinder, a plurality of diverter ports distributed at intervals are arranged on the compacting cylinder, a diverter plate is arranged at each diverter port, the diverter plate is rotatably matched with the compacting cylinder, the diverter plate can extend into the spiral channel, and the amount of diverted soil can be adjusted according to the compaction degree of the soil layer; the pile drilling equipment for foundation construction of the present invention can automatically divert soil according to the looseness of the soil layer, and compact the borehole wall.

The invention provides a drainage pipeline supporting and connecting structure based on municipal engineering and a using method, the drainage pipeline supporting and connecting structure comprises a base, the base is provided with a reinforcing unit used for being inserted into soil and at least two clamping units used for clamping a drainage pipeline, and the distance between the clamping units can be adjusted through a first driving unit; the clamping unit comprises a clamping mechanism with the size adjustable through a second driving unit. Flexible adjustment of the distance between the clamping units is achieved through the first driving unit, and the device can adapt to drainage pipelines with different pipe diameters and different arrangement modes; the inner diameter size of the clamping mechanism is dynamically adjusted through the second driving unit, it is ensured that the clamping mechanism is tightly attached to the outer wall of the pipeline, and pipeline displacement caused by construction vibration or water flow impact is effectively restrained; the reinforcing unit is inserted into a soil layer to form multi-point anchoring, base loads are dispersed, the method is particularly suitable for soft soil or high-water-level areas, the differential settlement risk is remarkably reduced, and the later maintenance frequency is reduced.

The invention provides a soil sample compacting method which comprises the following steps: establishing a corresponding relationship between dry density and pressure stress of a soil layer through a filling test, and determining a pressure stress level sequence corresponding to the dry density of the soil layer under a target dry density; filling a soil layer in the test model box in a layered manner, respectively applying corresponding pressure stress to the soil layer based on the pressure stress hierarchical sequence to adjust the dry density so as to form a composite soil body with a target dry density in the test model box, and arranging a soil pressure detection part in the composite soil body; after a part of the soil layer of the composite soil body is compacted, positioning drilling is carried out to form a drilling cavity, and the simulation pile body of the pre-installed strain detection component is pressed into the drilling cavity; through stress transfer in the compaction process of the composite soil body, the drilling cavity generates radial deformation so as to realize tight coupling of the composite soil body and the pile periphery interface of the simulation pile body; the problems that when the dry density of the soil body is adjusted, efficiency is low, uniformity is poor, detection equipment is prone to damage in the pile forming process, and the compaction degree of soil around the piles and between the piles is insufficient are solved.

The invention belongs to the technical field of soil sampling, particularly relates to a river dam soil sampling device for intelligent water conservancy, and aims to solve the problems that traditional equipment can only obtain samples with single depth through single-time drilling, different soil layers can only be collected through repeated drilling, the efficiency is low, soil layer structures are damaged, and an effective isolation mechanism is lacked. In order to solve the problems in the prior art that soil at different depths is easy to mix in the collection or extraction process, and the detection accuracy is influenced, the invention provides the following scheme: the device comprises a disc ring, and three finger grooves are formed in the outer side of the disc ring; and the three supporting leg positioning structures are uniformly mounted at the bottom of the disc ring. Through cooperation design of the rotary sampling cylinder and the sampling hole, the precise 60-degree indexing rotary locking handle and the bottom sealing structure of the integrated drill bit, soil of different depths can be collected, the collected soil can be prevented from being mixed, the stability of the sampling process is ensured through three-point synchronous propulsion, and the sampling efficiency is improved. And the deployment of the river dam is simplified through the magnetic foot-stepping positioning insertion rods.

The invention relates to the technical field of hydraulic ring drilling, in particular to a drilling rig for hydraulic ring geology. Comprising a vehicle body capable of walking and a drilling bit vertically arranged on the vehicle body, and further comprises a sleeve coaxially arranged with the drilling bit, a lifting frame is arranged on the vehicle body, a horizontal mounting ring and an inclined ring plate are arranged at the bottom of the lifting frame, a soil loosening bit is rotationally arranged at the bottom of the sleeve, and a rotary driving mechanism and a reset switching mechanism are further arranged on the outer side of the sleeve. A soil scraping plate is rotationally arranged on the outer side wall of the sleeve, the soil loosening drill bit and the sleeve are both in transmission connection with a rotary driving mechanism, the rotating speed of the soil loosening drill bit is larger than that of the sleeve, an annular inserting end inserted into a soil layer is arranged at the bottom end of the sleeve, and a limiting rotating ring is fixedly installed on the outer side wall of the sleeve. By arranging the sleeve, soil can be prevented from being scraped into a drill hole by the soil scraping plate, the sleeve can be inserted into a soil layer, the drilling and broken soil cleaning effects are improved, the device is reasonable in structure, and drilling operation can be smoothly carried out under different geological conditions.

The invention discloses an acidity and pressure dual-mode termite nest positioning method and equipment, and relates to the biological control, termite nest positioning and data processing technology, and the method comprises the steps: controlling a device with a drill rod, and carrying out the downward drilling at a designated position; soil acid and bit pressure are obtained in the drilling process; according to the obtained soil acidity and bit pressure, a fractional order differential model is established, and the accumulation of termite nest formation and environmental action is analyzed through the fractional order differential model; and outputting the probability of existence of the termite nest in the specified position according to the fractional order differential model. According to the embodiment of the invention, the acidity volatility is deeply measured through minimally invasive drilling, the existence and the specific position of the main nest are further judged, and whether a hole exists in the soil layer or not is judged by combining the change of drilling pressure (push rod force) in the soil penetrating process.

The invention discloses a sluice construction project earthwork filling quality evaluation method and evaluation system based on real-time monitoring. The method comprises the following steps that soil pressure monitoring values and changes thereof in the earthwork filling process are monitored in real time through a soil pressure meter; selecting a box culvert section as a typical position, and establishing a three-dimensional finite element model of a filled soil body; calculating the three-dimensional finite element model of the filled soil body based on finite element analysis software, and inputting preset material parameters, boundary conditions and loads to obtain a soil pressure calculation value and changes thereof in the layer-by-layer filling process; performing comparative analysis on the soil pressure calculation value and the soil pressure monitoring value, and screening out reliable soil pressure monitoring values of different soil layers; according to the conversion relation between the compaction degree and the soil pressure, compaction degree monitoring values of different soil layers are obtained through calculation; the compaction degree monitoring value is compared with the designed compaction degree, and the earthwork filling quality is evaluated. The method can provide corresponding basis and reference for management and control of earthwork filling quality by managers.

The invention relates to the technical field of forest fertilization, in particular to a forest precise fertilization decision-making method and system based on soil nutrient profit and loss, and the method comprises the steps: obtaining basic information of a target forest land, and dividing forest growth stages based on the basic information; the method comprises the following steps: collecting an undisturbed soil sample and a mixed soil sample of a 0-40cm soil layer of a target forest land by adopting an S-shaped point distribution method, separating the mixed soil sample, and respectively measuring the soil nutrient content, the bioavailability, the soil enzyme activity and the microbial functional gene. According to the method, by measuring the dimension indexes, constructing a five-dimensional profit and loss evaluation index system for determining the reference value and dynamically adjusting the weight according to the forest land data, calculating the comprehensive profit and loss index, judging the nutrient state and generating the personalized fertilization scheme, the defects that an existing fertilization scheme is single in basis index and lacks an effective dynamic adjustment link are effectively overcome; the requirements of multi-generation continuous planting forest land are met, and the environmental risks such as fertilizer waste, soil acidification and water eutrophication are effectively reduced.

The utility model belongs to the technical field of experimental research, and particularly relates to an experimental device for researching a subsurface zone pollutant migration rule, which comprises a water injection component, a column body, a filling medium and a detection component, the column body is of a cylindrical cavity structure, the upper end and the lower end of the column body are each provided with a water injection opening, and the two water injection openings are each communicated with one output end of the water injection assembly; the filling medium is arranged in the column body and is used for simulating a soil layer structure from surface water to underground water; the detection assembly comprises a processor, an environment monitoring module and a pollutant collection module; the environment monitoring module is used for monitoring different depth environment indexes in the filling medium; and the pollutant collection module is used for collecting pollutants at different depths in the filling medium at regular time and transmitting the pollutants to the processor for analysis. The device can avoid the interference of external environmental factors, and provides reliable reference data for accurately analyzing the migration rule of the subsurface zone pollutants in the vertical direction.

The utility model relates to the technical field of geological survey, and provides a layered soil sampling device for geological survey, which comprises a fixing ring, a plurality of fixing components are arranged at the bottom end of the fixing ring and used for fixing the fixing ring, and the fixing components are annularly arrayed at the bottom end of the fixing ring and used for fixing the fixing ring. A soil sampling assembly is arranged on the inner side of the fixing ring and used for drilling soil, a transmission assembly is arranged at the upper end of the soil sampling assembly and used for transmitting the soil sampling assembly, the fixing assembly comprises a fixing rod fixedly connected to the outer wall of the bottom end of the fixing ring, and an anchoring rod is fixedly connected to the outer wall of the bottom end of the fixing rod. When the device is used for sampling soil layer by layer, the first soil sampling half cylinder and the second soil sampling half cylinder are separated, layered soil is taken out, the situation that wet soft soil pollutes other soil layers in the extrusion process is reduced, the sampling efficiency of the device is improved, and therefore the purity of a sample is improved.

The present disclosure relates to a pneumatic serial device for spraying materials into a deep soil layer and an implementation method thereof. The device comprises a material spraying injector (1), a air blasting system (2) connected with the material spraying injector (1), and a material feeding system (3), wherein the air blasting system (2) and the material feeding system (3) are connected with the material spraying injector (1) in series in sequence, wherein the air blasting system (2) comprises a high-pressure air tank (2-1) and a quick relieve valve (2-2), the material feeding system (3) comprises a material chamber (3-1), a feeding valve (3-2), a valve I (3-3), a material sending chamber (3-4), a valve II (3-5) and a material delivery pipe (3-6) which are connected to each other in sequence, and the material delivery pipe (3-6) extends into the high-pressure air tank (2-1) and is communicated with the quick relieve valve (2-2) at the bottom thereof. Combined with the implementation method thereof, the device can uniformly apply a certain amount of various materials into the soil layer at any depth, replacing the traditional method, greatly improving the operation efficiency of applying materials into the deep soil layer, significantly reducing the cost of applying materials into the deep soil layer, and reducing the labor intensity.

The application relates to a suction cylinder sinking resistance calculation method and relates to the technical field of suction cylinder foundation construction, which comprises the following steps: calculating the clay content index of a clay-sand mixed soil layer by using a pore pressure static sounding test structure; calculating the upper limit value of the side resistance coefficient of the suction cylinder, the lower limit value of the side resistance coefficient of the suction cylinder, the upper limit value of the end resistance coefficient of the suction cylinder and the lower limit value of the end resistance coefficient of the suction cylinder according to the clay content index; and calculating the first sinking resistance based on the above resistance coefficients and by using a formula. The application establishes a suction cylinder sinking resistance calculation method for the clay-sand mixed soil layer, clearly defines the quantitative relationship between the clay content index of the clay-sand mixed soil layer and the sinking resistance coefficient (including the end resistance coefficient and the side resistance coefficient), solves the problem that the calculation parameters of the suction cylinder sinking resistance in the clay-sand mixed soil layer are not clear in the existing norms, and improves the accuracy of the sinking resistance calculation result.