161 results about "Soil model" patented technology

According to the offshore wind turbine single pile rigidity numerical simulation method considering long-term circulation and scouring, the accuracy and the calculation convenience are both considered in model building through the linear elastic steel pipe pile model and the Mohr-Coulomb soil body model. By calculating the horizontal ultimate bearing capacity of the single pile, combining the ultimate analysis method and the p-y curve calculation method, the influence of different scouring depths on the fan is considered, the horizontal load bearing capacity and inherent frequency evolution of the single pile are comprehensively measured, and a basis is provided for design and safety evaluation. A sandy soil rigidity attenuation model is established for secondary development of Abaqus and verified, and the rigidity change of sandy soil under long-term cyclic loading is considered, so that the simulation precision is improved. And the numerical model is tested and verified to ensure the reliability. And the accumulated lateral displacement of the steel pipe pile can be accurately predicted, the influence rule of cyclic load times, soil elasticity modulus and embedding depth factors on displacement development is disclosed, wind power engineering design optimization is assisted, and economical efficiency and safety are improved.

The invention discloses an evapotranspiration satellite remote sensing inversion method directly considering soil humidity stress, and the method comprises the steps: firstly constructing an improved canopy water vapor conductivity model, and then enabling the conductivity model to be coupled into a canopy transpiration module in a P-LSH algorithm, and obtaining an improved canopy transpiration algorithm; then analyzing the sensitivity and uncertainty of framework evaluation parameters, constructing a most effective humidity stress model suitable for bare soil evaporation in a bare soil area, and coupling the humidity stress model into a soil evaporation mode in a P-LSH algorithm to form an improved bare soil evaporation algorithm; and finally, coupling the improved canopy transpiration algorithm and the improved bare soil evaporation algorithm in combination with a water evaporation module in the P-LSH algorithm to obtain a global evapotranspiration remote sensing inversion algorithm directly considering soil humidity stress. According to the method, the stress effect of soil humidity on evapotranspiration is considered, a global evapotranspiration remote sensing inversion algorithm is developed, and a global evapotranspiration product with high precision and high temporal-spatial resolution is generated.

The utility model relates to the field of soil body model test saturation, in particular to a rubber mixed soil model test saturation device. The device comprises a model box, a vacuumizing assembly, a saturated liquid permeation assembly and a saturated liquid chamber, wherein rubber mixed soil is placed in the model box; the vacuumizing assembly is used for conducting vacuumizing operation on the interior of the model box from the top of the model box. The saturated liquid permeation assembly comprises a plurality of longitudinal permeation pipelines and a plurality of transverse permeation pipelines, the longitudinal permeation pipelines and the transverse permeation pipelines are laid at the inner bottom of the model box and jointly form a grid shape, and the longitudinal permeation pipelines and the transverse permeation pipelines are each provided with a plurality of holes used for discharging water and wrapped with geotechnical filter cloth; the saturated liquid chamber is communicated with the saturated liquid permeation assembly and used for supplying saturated liquid to the saturated liquid permeation assembly. The device is suitable for rapid and high-quality saturation of rubber light mixed geotechnical materials, and the saturated liquid permeation assembly is high in flexibility, detachable, easy to clean and free of hole blocking risks.

The present invention relates to the technical field of foundation pit support, and discloses a foundation pit support monitoring and early warning system, including a software model system, an on-site support system, a deformation monitoring system, a safety early warning system and a graphic digital display system, and also discloses a foundation pit support monitoring and early warning method, including the following steps: S1, geological data input; S2, soil model establishment; S3, support structure model establishment; S4, support structure on-site arrangement; S5, deformation monitoring establishment; S6, safety early warning establishment. The present invention uses a reinforcement method of geological data input, soil model establishment, support structure model establishment, support structure on-site arrangement, deformation monitoring establishment and safety early warning establishment, thereby dynamically monitoring the foundation pit through the combination of the model and the work site, thereby comprehensively reflecting the influence of various factors on the support structure and the stress and displacement of the axonal soil in space and time, and realizing the safety during the excavation of the foundation pit.

The invention provides a high-pile wharf anti-seismic toughness evaluation method and system based on finite elements, and relates to the technical field of high-pile wharfs, and the method comprises the steps: firstly constructing a finite element soil body model and a finite element wharf model at a high-pile wharf, and forming a finite element coupling model after coupling for simulating an earthquake situation under a real condition; after simulated seismic waves are applied to the finite element coupling model, the damage condition of the soil body, the damage index of the wharf, the energy dissipation of the wharf and the ductility coefficient of the wharf under the action of the seismic waves are analyzed respectively; wherein the damage index, the energy dissipation coefficient and the ductility coefficient are used for evaluating the damage degree, the energy absorption and consumption capacity, the deformation capacity and the ductility of the wharf respectively, fitting analysis is conducted on analyzed parameters, a comprehensive toughness evaluation index for reflecting the anti-seismic capacity of the high-pile wharf is generated, and finally the anti-seismic grade of the wharf structure is output. Workers are assisted to complete shock resistance toughness evaluation of the wharf, and the working efficiency is greatly improved.

The invention discloses transparent soil with high transparency and high similarity with natural soil and a preparation method of the transparent soil. The transparent soil comprises transparent particles, transparent pore liquid and an additive. The refractive indexes of the transparent particles and the transparent pore liquid are consistent, and the contact infiltration characteristic of the particle surfaces and the liquid is improved through the surfactant, so that the transparent soil with higher transparency, such as sandy soil, clay and floury soil, is obtained. Hydrophilic fumed silica is matched with polar pore liquid or hydrophobic fumed silica is matched with non-polar pore liquid to prepare high-strength transparent clay or silt with mechanical properties highly similar to those of natural clay or silt. According to the invention, the clay or silt consolidation time can be greatly shortened. The transparent soil with high transparency and high similarity with natural soil can improve the geometric dimension of a transparent soil model, reduce the dimension difference between a model test and a real engineering problem, and provide a more excellent method for researching various geotechnical geological engineering problems.

The invention provides a torsional vibration analysis method and device for a partially embedded pile based on an unsaturated viscoelastic soil model and electronic equipment. The torsional vibration analysis method for the partially-embedded pile based on the unsaturated viscoelastic soil model comprises the steps that assumed conditions are set; based on the assumed conditions and the three-dimensional continuous medium theory, a control equation of a transverse isotropic unsaturated fractional derivative viscoelastic soil body based on a Biot type is established, and a pile body torsional vibration control equation based on an Euler-Bernoulli rod and partially buried in soil and partially exposed out of the ground surface is established; and based on a separation variable method, torsional vibration of part of the embedded piles is analyzed. Through an innovative method based on a transverse isotropic unsaturated viscoelastic soil model, an accurate analysis means is provided to support application in partial embedded pile design and engineering practice, so that the purpose of improving construction efficiency and engineering quality is achieved.

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 invention relates to a method for creating a three-dimensional soil model for a plot of land, particularly a building plot, wherein data is acquired in relation to a site plan of the plot, data is acquired in relation to a plurality of exploratory borings, which have been carried out on the plot at specific exploration points and for each exploratory boring a layer structure of the soil, with individual layers and their layer thickness, has been ascertained, and the individual exploration points are entered in the acquired site plan of the plot, wherein the individual layers for each exploratory boring are analyzed by means of a computer unit and are assigned in each case to a common soil layer, a layer thickness profile of the individual soil layers within the plot is interpolated depending on the position of the individual exploratory borings to one another, and the three-dimensional soil model for the plot is created by the computer unit in this way.

The invention discloses a practical method for calculating additional settlement of a foundation by considering a'pot cover effect ', and relates to the technical field of geotechnical engineering.The method comprises the steps that the increment of the moisture content and the suction variation of soil bodies with different depths caused by the'pot cover effect' are calculated; unsaturated soil model parameters are constructed through an indoor triaxial test; and with the UH constitutive model of the unsaturated soil as a core, performing foundation settlement calculation based on a layering sum algorithm. According to the method, the suction variation of soil bodies with different depths is calculated, soil property parameters determined by indoor tests are combined, an unsaturated soil UH constitutive model is taken as a core, and a calculation method for the additional settlement of the foundation correctly reflecting the influence of the pot cover effect is established on the basis of a layering sum algorithm; practical calculation of foundation additional settlement caused by the pot cover effect is achieved for the first time.

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 provides a frozen soil layer evolution test device and method under static and dynamic loading, and the device comprises a frozen soil box body which comprises a first region and a second region surrounding the first region, the first region is provided with a frozen soil model which simulates the layering of a frozen soil structure, and the second region is provided with a temperature adjustment device which is used for simulating the change of environment temperature; the second area provides a deformation space of the frozen soil model; the stress device is used for applying dead load force and dynamic load force to a preset position of the frozen soil model; the observation data acquisition equipment is arranged on the slope side of the frozen soil model box and is used for acquiring an evolution image of the frozen soil model; the parameter acquisition equipment comprises internal parameter acquisition equipment and external parameter acquisition equipment, the internal parameter acquisition equipment is arranged in the frozen soil model and used for acquiring internal parameters of different structural layers of the frozen soil model, and the external parameter acquisition equipment is arranged outside the frozen soil model and used for acquiring surface deformation parameters of the frozen soil model.

The invention discloses a soil ecological function assessment method and system based on soil environment big data, and relates to the technical field of ecological function assessment, and the system comprises a soil sampling module, a sampling point soil model construction module, a soil model function analysis module and a soil ecological function assessment module. A soil sampling module and a sampling point soil model building module are arranged, a plurality of soil sampling points are arranged in a target soil area, it can be ensured that collected soil data can comprehensively reflect the characteristics of the target soil area, and a soil model of each soil sampling point is built; according to the method, a soil model function analysis module and a soil ecological function evaluation module are arranged, simulation of various ecological treatment functions is carried out on a soil model of each soil sampling point, and the ecological treatment function of soil in each soil sampling point is deeply evaluated.

The invention relates to a method for determining settlement and internal force of a stiffening core cement soil composite pile under the action of a vertical dynamic load of a pile top, and belongs to the technical field of bridge engineering. According to a cement soil radial reinforcement range, decomposing the calculation model into a cement soil reinforcement area and a cement soil non-reinforcement area, and determining a soil modal function, a characteristic equation and a characteristic root related to depth in different areas; a pile infinitesimal body settlement control equation is established and solved, and a soil settlement expression is obtained; determining the soil resistance per unit length of the stiffening core and the pile periphery interface; obtaining a stiffness core settlement and axial strain expression based on the stiffness core infinitesimal body settlement control equation; solving unknown coefficients in the stiffness core settlement and axial strain expression; and under the condition of different cement soil reinforcement ranges, a depth change diagram of settlement and axial strain of the stiffening core cement soil composite pile and a pile top vertical rigidity frequency spectrum response diagram are drawn. According to the method, the stiffness, settlement and axial strain spectrum response rules of the pile top of the stiffening core cement soil composite pile under the action of the vertical dynamic load of the pile top can be better reflected.

The utility model provides an underground diaphragm wall retaining wall mud film detection test device under unfavorable geological conditions. The device comprises a rack; the multi-layer soil body model box is arranged at the lower part of the rack, and at least two soil body model boxes in the multi-layer soil body model box are different in soil texture; one end of the grooving simulation part is inserted into the bottom of the multi-layer soil body model box; the lifting component is arranged at the top of the rack, is connected with the grooving simulation component and is used for driving the grooving simulation component to lift; and each grouting pump is internally provided with slurry with different proportions, each layer of soil body model box is connected with one grouting pump through a grouting pipe, and the number of the grouting pumps is smaller than the number of layers of the multi-layer type soil body model box. According to the utility model, the multi-layer soil body model box and the plurality of slurry grouting pumps with different proportions are arranged, so that the quality of slurry under various unfavorable geological conditions or the quality of a mud film formed by various types of slurry and a soil body can be detected at the same time, and the film forming quality of the slurry and whether the slurry can become a screening standard of the mud film can be accurately grasped.

The invention provides a transparent soil model analysis method and system and a detection method, and the method comprises the following steps: building a transparent soil-based initial test model having a test association relationship with a test target, and carrying out the distribution analysis of the initial test model, obtaining a first form distribution diagram composed of a plurality of initial distribution areas; performing a deformation experiment of the corresponding transparent soil on the initial test model based on any test item, and performing distribution analysis on the obtained current test model to obtain a second form distribution diagram composed of a plurality of current distribution areas; performing image comparison on the first form distribution diagram and the second form distribution diagram, and determining a region deviation value of an initial distribution region and a current distribution region corresponding to each same region position based on a comparison result; and generating a current result publicity graph corresponding to the test item based on all the region deviation values. The test accuracy is at least improved.

The invention relates to the technical field of power systems, in particular to a 500kV power cable finite element modeling and conductor temperature simulation method. Comprising the steps that firstly, finite element software is used for producing a 500kV power cable geometric model according to data information; secondly, setting corresponding environment boundary conditions and electromagnetic boundary conditions according to different cable laying environments; for a buried type, a multi-layer soil model is established; according to the model, heat convection boundaries and heat conduction boundaries can be set for different sublayer soil models, so that buried boundary conditions are formed; for an overhead type, environment data of different overhead heights are collected and analyzed, and overhead type boundary conditions are set through radiation influence and heat conduction effect; electromagnetic boundary conditions realize setting of an electric field and a magnetic field according to a cable contact medium; and finally, carrying out grid optimization on the key area of the cable through a grid optimization method. According to the method, accurate simulation of the conductor temperature is realized.

The invention discloses a slope angle dynamic adjustment test device and method suitable for hypergravity. The model box supporting system and the angle adjusting system are both connected to an external hoisting bottom plate, the instability model box is used for containing a soil body model and hinged to the model box supporting system, the stacking model box is movably installed on the angle adjusting system, the instability model box is in lap joint with the stacking model box, and the angle adjusting system is externally connected with a control system. The method comprises the steps that the device is assembled, and the soil body model is placed in the instability model box; hoisting the whole device into a geotechnical centrifuge, and carrying out a slope angle dynamic adjustment test in a supergravity environment; the soil body model in the instability model box is observed in the slope angle dynamic adjustment test, and then the destructive performance of the prototype soil sample under the slope with different gradients under the real working condition is restored. The device can reproduce the processes of slope instability, sliding and deceleration accumulation, and has the characteristics of large angle adjustment range, stable angle inclination rate, good controllability and the like.

The invention relates to the technical field of pipeline detection, and discloses a buried pipeline circumferential weld stress probability distribution determination method, device and equipment and a medium. The method comprises the following steps: acquiring a plurality of moisture content data of soil in a target area in a preset time period and a plurality of buried depth data of a buried pipeline; according to the probability distribution of the soil moisture content and the buried pipeline burial depth in the target area corresponding to the multiple moisture content data and the multiple burial depth data, randomly sampling the multiple moisture content data and the multiple burial depth data; simulating a plurality of service environments of the buried pipeline through the sampled water content sample, the buried depth sample and a pipe-soil model for representing the interaction force between the soil in the target area and the buried pipeline so as to obtain the circumferential weld stress of the buried pipeline in each service environment; and high-reliability evaluation of the pipeline circumferential weld is realized by representing a probability density function of circumferential weld stress probability distribution of the buried pipeline in a plurality of service environments.

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 of evaluating collapse behaviour of an open hole wall based on a constitutive soil model characterising surrounding soil of the open hole is disclosed. The method is performed by a processor and comprises the steps of: obtaining geometrical parameters of an axisymmetric slice of the open hole and the surrounding soil; creating a numerical model comprising a mesh having a plurality of elements representing the axisymmetric slice of the open hole and the surrounding soil, based on the obtained geometrical parameters; assigning simulation parameters to the numerical model, the simulation parameters comprising initial stresses, constitutive soil model properties and initial boundary conditions; determining that one or more boundary elements of the mesh develop a deformation larger than a deformation threshold, by updating the mesh during a time stepping process; removing the one or more boundary elements determined to develop a deformation larger than the deformation threshold; updating boundary conditions of the mesh; and repeating the determining, removing and updating steps until a defined criterion is met. Unlocking insights from Geo-Data, the present invention further relates to improvements in sustainability and environmental developments: together we create a safe and liveable world.

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 relates to a method and a system for tracing the operation process of a mechanized open caisson underwater excavation robot based on data driving. The method comprises the following steps: acquiring construction data of the operation process of the underwater excavation robot as historical data; analyzing the historical data and arranging the historical data according to the sequence of a time axis to obtain sorted data; obtaining an underwater excavation robot model, a cross beam model and a blade foot ring model, constructing a soil body model in real time according to the sorting data, and performing three-dimensional scene construction on the soil body model, the blade foot ring model, the cross beam model and the underwater excavation robot model which are constructed in real time, so as to obtain a playable three-dimensional animation; and the three-dimensional animation is played through a player, so that the operation process of the underwater excavation robot is traced. According to the method, the three-dimensional scene and the two-dimensional scene are established through digital twinning, so that constructors can visually and efficiently carry out rewinding.

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 present invention relates to an experimental device and method for calibrating the accuracy of photogrammetric measurement of the stone content of a soil-rock mixture. The device comprises a motor, a rotating shaft, a transparent model box, a bracket, a high-definition camera, and a base. The bracket is mounted on the base, the motor is fixed to the bracket, the motor is in transmission connection with the rotating shaft, the rotating shaft passes through the transparent model box and is mounted on the bracket. The transparent model box is used to hold the soil-rock mixture and rotates synchronously with the rotating shaft. The high-definition camera is located directly below the transparent model box. The present invention can change the exposed surface of the soil-rock mixture displayed at the bottom of the soil model box by rotating the model box, simulating the randomness of the stone distribution on the exposed surface of the soil-rock mixture in nature, facilitating statistical analysis of errors and obtaining reliable error statistics.

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 present invention discloses a reinforcement-soil interface friction characteristic test device and test method, the device comprises a fiber-soil model box, a portable fiber fixing device, a test platform body, a water drop loading device, a traction pulley device, a horizontal observation device, a test platform leveling device, a vertical loading device, a laser displacement sensor and a computer. The present invention obtains the shear stress-strain relationship between the fiber and soil interface under different loads by adjusting the size of the overlying load, thereby obtaining the test parameters such as the shear strength, interface cohesion, internal friction angle, shear displacement, etc. of the interface, and can realize the study of the effect and mechanism of the influence of parameters such as different soil qualities and different fiber types on the test by changing the soil type, soil properties, fiber type, etc., especially for the test study of the friction characteristics of the reinforcement-soil interface of fiber-reinforced soil, revealing the laws of stress and deformation of the reinforcement-soil interface.

The invention discloses a soil compaction degree non-contact detection method based on an electromagnetic wave reflection principle. The method comprises the following steps: S1, transmitting an electromagnetic wave signal to the surface of to-be-detected soil by adopting a multi-band electromagnetic wave source; s2, receiving the reflected electromagnetic wave signals through a plurality of receiving sensors, and obtaining multi-path reflection data; s3, based on the intensity, propagation time and frequency characteristics of the electromagnetic wave reflection signal, establishing a soil model, and considering the influence of soil humidity, temperature and type on the signal; and S4, analyzing the compaction degree through a machine learning algorithm or a signal processing algorithm in combination with the soil model to obtain a quantitative value of the soil compaction degree. By adopting multi-band electromagnetic waves and multi-path reflection data analysis, the influence of soil types and environmental factors (such as humidity, temperature, weeds and the like) on a detection result is reduced, the measurement precision is improved, and an improved signal processing technology and a soil model can adapt to different types of soil from sandy soil to clay and the like.