61 results about "Soil model" patented technology

The invention belongs to the technical field of calculation of horizontal bearing capacity of foundations, and particularly discloses and provides an accurate calculation method for horizontal bearing capacity of an offshore wind power foundation, which comprises the following steps: integrating wave spectrum, wind regime, tide and soil mass parameters to form a multi-dimensional data set; a three-dimensional pile-soil model is constructed, and wave force and wind load are coupled; calculating a stiffness coefficient and identifying a pile body type in combination with a length-diameter ratio; quantifying an environment deviation compensation coefficient according to the pile body type; after the initial horizontal bearing capacity is calculated, the bearing capacity failure critical state is judged based on real-time displacement monitoring data, and if the critical state is reached, the initial bearing capacity is corrected through linear weighting of the displacement deviation compensation coefficient and the environment deviation compensation coefficient. According to the method, the time-varying environment load is dynamically coupled, the pile-soil interaction is finely simulated, a rigidity self-adaptive grading mechanism and a double compensation feedback system are established, and the calculation precision and the real-time early warning capability of the horizontal bearing capacity in the complex marine environment are remarkably improved.

The application discloses a kind of based on transparent soil and pile-soil interface micro evolution measurement method of multi-source sensing, it is related to geotechnical engineering test field.The present application includes the following steps: constructing transparent soil model, pile body pre-embedded sensor arrangement, multi-source sensor calibration and parameter optimization, load application and multi-source data acquisition, improved DIC algorithm's pile-soil interface micro displacement calculation, pile-soil interface pore and particle density calculation, multi-source sensing data's heterogeneous fusion, pile-soil interface micro evolution characteristic quantitative inversion and visualization, test end and data verification.The present application simulates real soil environment by constructing transparent soil model, in combination with image recognition, digital image correlation, fiber-optic sensing and resistance sensor and other multi-source sensing technology, the micro deformation, stress distribution and failure evolution process of pile-soil interface in loading process are monitored and analyzed in real time with high precision, realize the high-precision, full-process, visual measurement of pile-soil interface micro evolution, improve measurement precision.

The invention belongs to the field of rock-soil simulation, and provides an ice-water phase change finite element simulation method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining soil parameters, temperature change data and hydraulic characteristic data of a target tailings pond; constructing a tailing pond frozen soil model by adopting a finite element method according to the soil parameters; determining a temperature field of the target tailing pond according to the temperature change data and a tailing pond frozen soil model; determining a seepage field of the target tailing pond according to the hydraulic characteristic data and the tailing pond frozen soil model; according to the seepage field, calculating the tailing pond frozen soil model to obtain initial seepage characteristics of the tailing pond frozen soil model when the tailing pond frozen soil model is not melted; and performing heat flow coupling calculation on the tailing pond frozen soil model according to the initial seepage characteristics and the temperature field to obtain a frozen soil melting simulation result of the target tailing pond. The method has the beneficial effect that the accuracy of ice-water phase change tailing pond frozen soil melting and seepage characteristic finite element simulation is improved.

A method for optimizing a parameter set for a photovoltaic (PV) soiling model including executing the PV soiling model with a first plurality of parameter sets using as input wash data to generate first predicted energy loss data, calculating first losses based on a difference between the first predicted energy loss data and time-series sensor data, executing a parameter-tuning model using as input the first plurality of parameter sets to generate a second plurality of parameter sets, executing the PV soiling model with the second plurality of parameter sets using as input the wash data to generate second predicted energy loss data, calculating second losses based on the second predicted energy loss data and the time-series sensor data, and, in response to a loss of the second losses being below a threshold, generating a data structure including a parameter set corresponding to the loss.

This utility model discloses a visual soil model experimental device, which includes an experimental box, a base, a control cabinet, a compressor, a pressure tank, and a water tank. The control cabinet is electrically connected to the compressor and the pressure tank, and the output end of the compressor is connected to the inlet pipeline of the pressure tank. The pressure tank and the water tank are fixedly mounted on the top end face of the base. The outlet of the pressure tank is connected to the inlet pipeline of the water tank, and the outlet of the water tank is connected to the water inlet pipeline. The top of the experimental box is open, and telescopic devices are fixed on both sides of the top of the experimental box. A support frame is fixed between the top ends of the two telescopic devices. An annular water pipe is fixed on the bottom end face of the support frame. A nozzle is installed on the outer wall of the annular water pipe. The nozzle communicates with the inside of the annular water pipe, and the inlet of the annular water pipe is connected to the water inlet pipeline.

The application discloses a kind of discrete element modeling methods of multi-layer interpenetrating shear mixing drill and soil body, comprising: S1, the design parameter of multi-layer interpenetrating shear mixing drill is obtained, design parameter includes the pitch of blade, inclination, shape, size and quantity;Multi-layer interpenetrating shear mixing drill includes inner drill rod, multiple pairs of inner blades and outer frame arranged on inner drill rod;The outer frame includes multiple pairs of outer blades, two side plates and a collar arranged at intervals, and each pair of outer blades and each pair of inner blades are arranged at intervals;S2, the modeling of multi-layer interpenetrating shear mixing drill is carried out to obtain drill model;S3, establish soil model, import drill model, distribute contact model, and construct the coupling discrete element model between multi-layer interpenetrating shear mixing drill and soil particles;S4, simulation is carried out using coupling discrete element model, and quantitative analysis is carried out on mixing effect according to simulation result.The coupling discrete element model constructed by the above method has reliability and engineering applicability, and provides quantifiable basis for drill structure optimization.

The invention belongs to the technical field of control, and particularly relates to an intelligent remote control method and system for an irrigation electric valve, and the method comprises the following steps: S1, obtaining a target soil humidity set value and a current soil humidity actual value of an irrigation region; based on the network communication quality parameters between the remote control terminal and the electric valve, the pipe network pressure sensor data and the historical instruction execution data, the predicted execution lag time of the current control period is obtained through calculation; s2, calculating a theoretical prediction value of the soil humidity by using a preset water and soil model according to the valve opening degree and the environmental parameters of the previous period, and obtaining a model deviation value between the theoretical prediction value and the current actual soil humidity value; by comprehensively analyzing the network quality, the pipe network pressure and the historical data, execution lag in the control process can be recognized and compensated in advance, excessive or insufficient irrigation caused by delay is avoided, and the control stability is improved.

The application discloses a novel transparent soil model test device for simulating pipe-roof tunnel excavation and a test method thereof. The device comprises an excavation power system for pulling a temporary tunnel structure, a model tank, a pipe-roof model, a simulated tunnel structure, an acquisition system for acquiring speckle field dynamic deformation images and an image processing device for obtaining a three-dimensional deformation field of the transparent soil. The model tank is a T-shaped box structure, comprising a test area installed on a base and a connecting area suspended. The simulated tunnel structure is placed in the test area and comprises a hollow temporary tunnel structure with two open ends in an arch shape and a tunnel model in a solid arch shape arranged in the temporary tunnel structure. The pipe-roof model is an arch-shaped pipe row formed by bonding acrylic rods and arranged above the temporary tunnel structure. The application simulates an arch-shaped tunnel structure by an arch-shaped sleeve, can avoid soil disturbance, maintain tunnel section stability and truly restore the actual engineering state of tunnel excavation.

The application belongs to the technical field of foundation horizontal bearing capacity calculation, and specifically discloses a kind of offshore wind power foundation horizontal bearing capacity accurate calculation method, the method comprises: integrating wave spectrum, wind condition, tide and soil parameters to form multidimensional data set;Three-dimensional pile soil model is constructed and wave force and wind load are coupled;Stiffness coefficient is calculated and combined with length-diameter ratio to identify pile type;According to the type of pile, the environmental deviation compensation coefficient is quantified;After calculating the preliminary horizontal bearing capacity, the bearing capacity failure critical state is judged based on real-time displacement monitoring data, if the critical state is reached, the preliminary bearing capacity is modified by linear weighting of displacement deviation compensation coefficient and environmental deviation compensation coefficient.The application dynamically couples time-varying environmental load, simulates the interaction between pile and soil in detail, establishes a stiffness self-adaptive grading mechanism and a double compensation feedback system, significantly improving the accuracy and real-time warning capability of horizontal bearing capacity calculation in complex marine environment.

The invention discloses a deep foundation pit supporting structure construction monitoring method and system, and relates to the technical field of intelligent monitoring, and the method comprises the steps: deploying a global positioning system (GPS) module, a vehicle attribute module and a vehicle weighing module on a heavy construction vehicle in a deep foundation pit supporting structure construction area, and combining a vehicle-mounted control terminal and a 5G wireless communication module, operation disturbance data can be collected in real time and transmitted to the BIM platform central processing unit in a unified packaging format. The BIM platform constructs a two-dimensional space positioning grid and path trajectory mapping mechanism based on the received data, further generates a vehicle path disturbance heat map reflecting disturbance intensity, divides the vehicle path disturbance heat map into disturbance analysis unit areas, and extracts a disturbance data set based on BIM model soil modeling information. The disturbance intensity is quantitatively output through a disturbance aggregation index D calculation formula which is clear in physical significance and consistent in dimension, and visual display of the disturbance level is achieved in combination with a disturbance evaluation threshold value.

The invention discloses a pile foundation buckling behavior intelligent analysis method and system based on a transparent soil model test, and particularly relates to the technical field of engineering parameter intelligent analysis. The method is used for solving the problem that transparent soil test observation information cannot be effectively converted into accurate design parameters due to the fact that simplified representation of a traditional mechanical model is not matched with a real complex constraint form of soil around a pile. The method comprises the following steps: extracting displacement field data of soil around a pile from a transparent soil model test sequence image, and identifying a potential instability path; directly mapping to generate quantitative data representing soil body spatial constraint stiffness distribution according to the spatio-temporal evolution characteristics of the path by utilizing a trained machine learning model; then weak and strengthened constraint areas are identified based on the data, and the constraint contribution degree and the system redundancy improvement potential of each area are quantified through virtual parameter disturbance analysis; and finally, based on the quantitative indexes, pile foundation reinforcement scheme parameters for the weak area are generated, so that intelligence and refinement from test observation to reinforcement design are realized.

The invention belongs to the field of rock-soil earthquake engineering, and particularly relates to a method for evaluating the anti-seismic performance of an end bearing pile in stratified soil under the action of earthquake S waves. According to the method, a pile-soil model is established on the basis of a continuous medium theory under a linear elastic frame, and displacement of a free field and a scattered field of a soil body is decoupled through a Helmholtz decomposition method; the soil layer boundary is processed by adopting the orthogonality of a modal function characteristic function, and the motion response of the pile foundation is described by adopting a strict closed form solution. Frequency domain amplitude-frequency characteristic analysis is adopted, a motion corresponding coefficient and a motion amplification coefficient are introduced to quantitatively evaluate the influence of the soil layer thickness and the soil layer rigidity ratio on the anti-seismic performance of the end bearing pile, and theoretical support is provided for pile foundation optimization design.

The application provides an agricultural variable operation control system and method based on edge computing. In a pre-seeding stage, an edge computing unit generates a pre-prescription model P_P based on sampled soil information S_D and a soil model M. In a seeding stage, a soil real-time information monitoring unit keeps sampling the soil of an operation plot in real time, and the edge computing unit forms an actual seeding prescription P based on the pre-prescription model P_P and the real-time sampled soil information. In a crop harvesting stage, the edge computing unit receives crop yield information and latitude and longitude information of the operation plot sent by a crop yield measuring device and a satellite positioning device to generate yield-position information H_W, and imports the yield-position information H_W into a model updating and management center to correct the soil model M of the operation plot. Based on the joint regulation idea of edge learning, the application realizes efficient interactive regulation, continuously collects and processes yield information to improve model accuracy, optimizes variable seeding operation efficiency, and improves crop yield.

The invention discloses a transparent soil model test device for simulating shield synchronous grouting floating and a use method of the transparent soil model test device. The device comprises a transparent soil model box, a shield tunnel structure model, a synchronous grouting device, a base, a sliding rail, an industrial camera and a laser transmitter. The method comprises the following steps: 1) selecting a round cover and a negative ring cover which are matched; 2) filling transparent soil into the transparent soil model box until the transparent soil submerges the shield tunnel structure model; 3) installing a test device; 4) after standing for a period of time, starting a laser transmitter; 5) starting a synchronous grouting device to inject colored slurry into the steel pipe, pulling the shield body model out of the transparent soil model box by utilizing a drawing device, and continuously recording a speckle field formed in the transparent soil by the laser transmitter and the diffusion condition of the slurry by utilizing an industrial camera to obtain test simulation data; and 6) processing test simulation data by using a PIV technology to obtain a vector diagram of a transparent soil displacement field in the transparent soil model box and a diffusion diagram of slurry. The device is simple in structure, convenient to operate and high in reliability.

The application belongs to the technical field of tunnel mechanics experiment analysis, and discloses a soil model test box capable of realizing continuous change of fault dislocation, which comprises a box body, a first supporting part and a second supporting part arranged in the box body. The first supporting part comprises a first jacking piece, a first side plate and a plurality of first jacking plates. The first side plate can be fixedly connected with an adjacent first jacking plate or sequentially connected with the plurality of first jacking plates in the direction from the first side plate to the first jacking plates. After the first side plate is connected with the first jacking plates, the first jacking piece can drive the first jacking plates to move and simultaneously drive the first side plate to move, so that the soil body moves under the driving of the first jacking piece and the first side plate. The application realizes the control of the length of the dislocated soil body and the fault dip angle by selectively connecting different numbers of first jacking plates with the first side plate and changing the connection between the first jacking piece and the first jacking plates at different positions.

The application belongs to the technical field of control, and particularly relates to an intelligent remote control method and system for an irrigation electric valve, comprising the following steps: S1, obtaining a target soil humidity setting value and a current soil humidity actual value of an irrigation area; based on network communication quality parameters between a remote control terminal and the electric valve, pipe network pressure sensor data and historical instruction execution data, a predicted execution lag time of a current control period is calculated; S2, using a preset water-soil model, a theoretical predicted value of the soil humidity is calculated according to valve opening degree and environmental parameters of the last period, and a model deviation between the theoretical predicted value and the current soil humidity actual value is obtained. Through comprehensive analysis of network quality, pipe network pressure and historical data, the application can pre-identify and compensate for execution lag in the control process, avoid irrigation overabundance or deficiency caused by delay, and improve the stability of control.

The application discloses a marine environment flow state solidified soil continuous impact test device and operation method, belongs to the technical field of flow state solidified soil model test, and comprises a solidified soil model test mechanism, wherein a falling body test mechanism is arranged in the solidified soil model test mechanism, the solidified soil model test mechanism comprises a test shell, and a limiting assembly for limiting a supporting net is arranged on one side of the test shell. The marine environment flow state solidified soil continuous impact test device and operation method release the gravity ball through the releasing assembly, and then the gravity ball can impact the model downward for test; after the test, the model conveying assembly cooperates with the supporting net to convey the slag to the upper side, so that the slag can be automatically output through the impurity automatic output assembly, the slag residue can be avoided from affecting the next test, the model can be recharged, the model can be continuously and circularly conveyed through the model conveying assembly, the model can be sequentially converted, the detection, charging and slag discharge can be simultaneously performed, and the test efficiency is improved.

A seepage loading device for a model pile comprises a seepage system device and a lever loading system device. The seepage system device comprises a high-position water replenishing tank, a model box and a low-position water outlet tank, the high-position water replenishing tank is connected with the model box through a water inlet pipe, and the model box is connected with the water outlet tank through a water outlet pipe; a hole is formed in the upper part of the model box, a model pile is arranged in the box, the box is filled with soil, and the model pile is inserted into the soil; the lever loading system device comprises a vertical frame, the vertical frame is hinged to a transverse frame, and a loading frame is hung below the end of the transverse frame. The middle of the transverse frame is connected with a loading platform through a rotating shaft, and the loading platform is pressed on the pile top of the model pile. The model test device has the beneficial effects that the model test device is low in cost and simple to operate, has a flexible adjustment space, and can effectively simulate a complicated seepage environment in actual engineering.

The embodiment of the invention provides a two-library soil carbon cycle simulation method under an erosion condition and related equipment, and belongs to the technical field of data processing, and the method comprises the following steps: obtaining soil data of a target area; dividing the target area into a plurality of sub-areas; calculating a carbon library component of each sub-region according to the soil data; updating the carbon library components according to an erosion-deposition rule, wherein the erosion-deposition rule comprises soil layer number transfer rates of an erosion area and a deposition area; and simulating the carbon circulation amount of the soil according to the updated carbon library components. Soil carbon circulation under the erosion condition within the global range is simulated according to soil data of a target area through a two-library soil model, carbon library components are updated according to an erosion-deposition rule, the erosion-driven carbon circulation process is simulated, and soil organic carbon component properties and soil respiratory capacity changes are studied.

This invention discloses a visual transparent soil model test device and method for studying embankment deformation, belonging to the field of highway engineering test technology. It solves the problem that existing model test methods cannot visually display the internal deformation of embankments under load, thus hindering the analysis of foundation deformation patterns. Specifically, it includes a model box located at the bottom of a reaction frame, with an actuator mounted on top of the reaction frame. The model box is filled with soft soil material, and a loading plate is laid on top of the soft soil material. The bottom of the actuator contacts the loading plate. In this invention, the actuator applies a sinusoidal load to the soft soil material inside the model box, simulating traffic loads on the embankment. An industrial camera is used to capture real-time images of the changes in the speckle field of the soft soil beneath the embankment and within the embankment during the application of traffic loads, thereby analyzing the deformation mechanism of highway embankments in complex mountainous terrain. The analysis results are accurate and reliable, providing data support for the design and construction of highway subgrades in mountainous areas.

The application discloses a kind of optical fiber electromagnetic method fusion detection pipeline leakage deformation monitoring evaluation system and method, including to be measured pipeline, fill soil model, hydraulic pressure mechanism, electromagnetic method measuring line system, metal probe, current emission mechanism, stabilized voltage external power supply, magnetic probe array, distributed optical fiber system, central signal processor and analysis storage terminal;Magnetic probe array, distributed optical fiber system acquisition data information transmission to central signal processor, central signal processor is received to data information in real time processing, and through analysis storage terminal accurately evaluates pipeline leakage and deformation state;Evaluation method includes to be measured pipeline deformation, leakage range, leakage duration and temperature are parameter assigned, calculate pipeline safety state total score, determine the safety state of to be measured pipeline and make corresponding processing strategy step.The application has the advantages of simple operation, strong applicability, high monitoring precision, and has important engineering application value.

The invention discloses a bridge structure deformation real-time prediction method based on finite element analysis, and the method comprises the steps: building a coupling model containing a bridge structure and a rock-soil finite element model, introducing an agent model of a graph neural network to reproduce the mechanical response of a rock-soil model, and employing an asynchronous time step frame in a real-time prediction stage, the bridge structure model iterates in a small step length, the agent model provides interface reaction force in a large step length, and therefore calculation efficiency is improved, actual monitoring deformation data of a bridge is received, key parameters of the rock-soil finite element model are reversely calculated and updated based on the Bayesian inference theory, initial parameter deviation and the model time-varying effect are eliminated, and the calculation efficiency is improved. When the parameters are updated, re-training of the agent model is triggered to ensure that the prediction model and the real state of the bridge are kept synchronous for a long time; according to the method, the problem that real-time performance and long-term accuracy are difficult to consider in traditional finite element analysis is solved, and reliable prediction is provided for full-life-cycle health monitoring and prospective maintenance of a bridge structure.

The invention belongs to the technical field of spring models, and provides a large-diameter single pile spring model analysis method and system based on optical fiber actual measurement strain, and the method comprises the steps: converting distributed optical fiber actual measurement continuous strain data into bending moment and shearing force distribution of a pile foundation in the depth direction based on material mechanics and component section properties; then, according to the bending moment and shearing force distribution, a large-diameter single pile finite element model considering the pile-soil interaction is established; and finally, correcting the model in combination with the actually measured pile body mechanical response. Actual internal force is obtained through inversion of actually-measured strain data, then pile-soil model parameters are calibrated according to the actual internal force, and the precision and reliability of fan foundation design calculation are remarkably improved; compared with a traditional empirical model, the method has the advantages that the stress characteristics of the large-diameter single pile (the diameter is larger than 5 m) under the real operation working condition can be reflected more accurately, and design deviation is reduced.

The invention provides a preparation method of a salt-containing structural soil model, and belongs to the technical field of research and development of building construction materials, and the salt-containing structural soil is prepared from the following materials: a soil material, kaolin, cement, urea and salt. A specific gravity test, a particle analysis test and a limit moisture content test need to be carried out on the soil material, and a specific gravity test needs to be carried out on kaolin and cement. The method comprises the following steps: proportioning urea, the dried soil material, kaolin and cement in proportion according to a specific gravity result, layering, putting into a self-made square mold, compacting, putting a sample into a constant-temperature water bath kettle, curing, taking out the sample after the urea is fully dissolved, putting into a drying oven, drying, and saturating by using saline water with a certain concentration. The invention provides a simple and effective preparation scheme for artificially preparing the salt-containing structural soil model, and a reliable basis can be provided for design and construction of buildings in a salt-containing structural soil area.

The invention relates to the technical field of transformer station grounding grid evaluation, and provides a dynamic evaluation method and system for power station grounding short circuit transfer potential, and the method comprises the steps: employing a Wenner quadrupole method to measure the apparent resistivity of soil, and constructing an apparent resistivity-depth change curve; reversely deducing the resistivity and the thickness of each layer of soil by adopting an inversion algorithm and combining an analysis kernel function and Bessel function expansion, so as to obtain soil layering parameters of a multi-layer and non-uniform structure; and obtaining a short-circuit current, a grounding grid structure and the obtained soil layering parameters, and obtaining a grounding short-circuit transfer potential of the grounding grid of the to-be-evaluated power station by adopting coupling simulation analysis mixed with a finite element method and a moment method. According to the method, the real soil model is constructed by combining the Wenner quadrupole method measurement and the inversion algorithm, and the finite element and moment method coupling simulation is introduced, so that the grounding short circuit transfer potential is accurately evaluated, and the prediction precision and the system safety under the complex geological condition are remarkably improved.

The invention belongs to the technical field of coal mine disaster simulation and monitoring, and particularly relates to a multi-parameter and multi-dimensional perceptual testing device and method for a coal seam mining floor water progressive lifting rock-soil model test, and the device comprises a two-dimensional plane model frame, the side wall of the two-dimensional plane model frame is provided with a hydraulic overhead rail, and the hydraulic overhead rail is provided with a hydraulic pressure sensor. The device is high in integration degree, is rich in a two-dimensional plane model test system, a multi-parameter distributed sensing system, a mining simulation and loading system and a data acquisition and processing system, and is scientific in system design, high in reliability and high in reliability. And multi-parameter, multi-dimensional and real-time dynamic monitoring of the coal seam mining floor water progressive lifting guide process is realized. The device has the outstanding advantages of comprehensive detection parameters, continuous space coverage, strong anti-interference capability, visual data fusion and the like, and is wide in applicability.

The invention relates to the technical field of grounding grid fault diagnosis, and discloses a grounding grid fault diagnosis method based on earth surface potential frequency response, which comprises the following steps: S1, constructing a layered soil model, and correcting self-resistance and mutual resistance parameters of a conductor; constructing an admittance matrix containing multiple types of conductors based on the influence of self resistance, mutual resistance and leakage resistance of the conductors; s2, establishing a transient current model, and solving earth surface potential through frequency domain conversion; s3, simulating surface potential distribution in a fault-free state and a fault state, and extracting the characteristic change of the surface potential during the fault; s4, quantifying a fault characteristic value through a Manhattan distance function; the amplitude and frequency of the excitation current are optimized to amplify a fault characteristic value; and S5, diagnosing the fault type, position and degree of the grounding grid based on the characteristic value difference. According to the invention, the feature recognition precision under the uneven soil or complex grounding grid structure is effectively improved, the grounding grid fault diagnosis effect is enhanced, and the fault type, position and degree are accurately determined.

The present application relates to the technical field of submarine pipeline performance test, and discloses a submarine pipeline earthquake damage effect underwater shaking table simulation device and method, which comprises a water pool provided with a wave generator at one end and a wave absorbing net at the other end; a shaking table, which is concave downward at the bottom of the water pool to form a mounting groove, is arranged in the mounting groove and located between the wave generator and the wave absorbing net; a soil model box, which is arranged on the shaking table, has an opening at the top and is filled with test soil to form a seabed foundation, which is flush with the bottom of the water pool; and a pipeline model, which is arranged on the seabed foundation. The device can accurately simulate the propagation process of seismic waves in the seabed, fully consider the interaction between the submarine pipeline, soil and seawater, and has multiple working conditions and adjustability, so that the seismic response of the submarine pipeline under different working conditions can be accurately monitored and analyzed, and reliable basis can be provided for the seismic design and safety evaluation of the submarine pipeline.

A computer-implemented method is provided for facilitating agricultural operations in an agricultural field. In one example embodiment, the method includes identifying, based on spatial sampling of soil spectrum data for an agricultural field, ground sampling locations within the field to obtain physical soil samples representative of soil makeup for the field. The method also includes generating a soil model particular to the field by correlating soil properties for soil included in the soil samples obtained from the identified ground sampling locations to particular soil spectral bands included in the soil spectrum data for the field at the corresponding ground sampling locations. The method then further includes compiling, using the soil model, a soil map of the entire field visually illustrating particular seeds and / or populations of seeds to plant at different locations across the field and / or particular nutrient applications to apply at different locations across the field.

The invention provides a shield tunneling machine composite stratum tunneling prediction method based on discrete element simulation and a storage medium. The shield tunneling machine composite stratum tunneling prediction method comprises the steps of collecting stratum parameters of a shield construction section; establishing a three-dimensional model of the cutterhead; constructing a single-layer geological soil model in discrete element modeling software to form a tunneling simulation model; setting the thrust and the rotating speed of the cutterhead to carry out single-layer geological tunneling simulation, and obtaining tunneling speeds under different working conditions; establishing a mathematical model of the single-layer geological tunneling speed; according to the method, simulation is conducted on the single-layer geological tunneling process of the shield tunneling machine through EDEM software, a large amount of single-layer geological simulation data are obtained, the tunneling progress prediction from the single-layer geology to the composite stratum is achieved through weighted calculation, the prediction precision problem caused by insufficient data in the early stage of construction is solved, and the construction efficiency is improved. And the influence of the stratum change in the composite stratum on the tunneling efficiency can be effectively dealt with, and a reliable technical means is provided for accurate prediction of the tunneling progress of the shield tunneling machine.