2387results about "Material strength using steady shearing forces" patented technology

The invention relates to the technical field of design analysis, in particular to a soft soil deep foundation pit earth excavation construction scheme planning method and system.The soft soil deep foundation pit earth excavation construction scheme planning method comprises the following steps that a three-dimensional geological model is built based on geological exploration data, and rheological parameters, shear strength parameters and permeability coefficients of all soil layers are extracted to serve as layering parameters; according to the layering parameters and preset supporting structure rigidity parameters, a soil body rheological rate compensation coefficient is calculated, and an earthwork block excavation scheme with the grading thickness difference is generated; and in the excavation process, the displacement rate and pore water pressure data of the supporting structure are collected in real time, and when a monitoring value exceeds a preset threshold value, a dynamic adjustment instruction of the block excavation scheme is triggered. According to the method, the layering thickness and the blocking form are intelligently controlled according to different sensitivity levels, the matching coping capacity for soft soil instability inducements is improved, and the limitation that a single physical parameter dominates in traditional blocking design is broken through.

The invention relates to the technical field of PCB detection, and discloses an online defect detection method and system in the PCB production process and computer equipment, the detection accuracy can be improved by combining production parameters, image information and a design circuit diagram, potential defects can be found in the early stage, the PCB is divided into a plurality of areas, and the detection efficiency is improved. According to the PCB, each area can be independently welded and detected, the complexity of the whole PCB is reduced, the PCB is divided into a plurality of areas which are detected one by one, a specific defect area can be effectively positioned, through the regionalized detection and maintenance process, the unqualified area can be locally processed, the production efficiency is improved, and the production cost is reduced. By adopting the strategy based on multi-round detection, feedback and regional repair, through accurate positioning, local repair, detection efficiency improvement and automatic processing, the rejection rate of unqualified products is greatly reduced, the maintenance success rate is improved, and the problems of difficulty in PCB defect detection and resource waste in the prior art can be effectively solved.

The invention discloses a slope stability evaluation method based on micro-seismic signal double-dominant-frequency mechanism characteristics, and relates to material analysis and application. The method is based on the objective principle that rock acoustic emission dominant frequency characteristics and micro-seismic signal dominant frequency characteristics have consistency and relevance, and the phenomenon of double dominant frequency characteristics existing in acoustic emission tests and micro-seismic monitoring. A rock sample dominant frequency characteristic rule obtained by an acoustic emission test is used for processing micro-seismic signal waveform data obtained by micro-seismic monitoring, so that a dominant frequency characteristic evolution rule of slope rock damage can be obtained through a micro-seismic signal, and the stress condition of the slope rock is more accurately judged based on the dominant frequency characteristic evolution rule; the stability of the slope is evaluated, so that the accuracy of an evaluation result is remarkably improved; the evaluation method combines an acoustic emission test and micro-seismic monitoring, has the advantages of high evaluation accuracy and good universality, and is suitable for large-scale application in monitoring and prevention of geological disasters such as landslide and the like.

The invention relates to the technical field of ultra-high performance concrete, particularly discloses a fatigue performance evaluation method for a steel-UHPC combined bridge deck slab, and is used for solving the problem that the fatigue damage evolution process of the steel-UHPC combined bridge deck slab in the life cycle is difficult to accurately predict due to the fact that an existing evaluation method does not consider the influence of structural fatigue performance degradation. And the evaluation result is likely to be unsafe. According to structural parameters and material attributes of a reinforced UHPC layer, fatigue performance evaluation of a reinforced UHPC component under the action of an axial tension fatigue load is carried out, fatigue performance analysis of a stud connecting piece in ultra-thin UHPC under the action of a shear fatigue load is carried out, bending fatigue performance analysis of a steel-UHPC-pavement composition board is carried out based on a five-point bending test, and the bending fatigue performance of the steel-UHPC-pavement composition board is analyzed. And a time-varying fatigue analysis framework of the steel-concrete composite effect degraded steel-UHPC composite bridge deck is established, so that the evaluation result is more reliable, and the risk of unsafety is reduced.

The invention provides a cooperative early warning method, system, equipment and medium for deformation stress of soft soil around a pile, and relates to the technical field of underground engineering, and the method comprises the steps that monitoring data of the soft soil around the pile are obtained based on monitoring points, and the monitoring points comprise pile body monitoring points and soil body monitoring points; feature extraction is conducted on the monitoring data, and monitoring indexes reflecting pile periphery soft soil deformation and stress evolution are obtained based on information contribution degree difference and sensitivity selection; performing model construction based on the monitoring data and the monitoring indexes, and obtaining a deformation-stress collaborative map of the soft soil around the pile by considering risk assessment and spatial heterogeneity; and on the basis of the deformation-stress collaborative atlas, abnormal recognition of the soft soil around the pile is carried out, an abnormal area is obtained through embedded learning and clustering analysis, graded early warning is carried out according to the abnormal area, and an early warning result of the soft soil around the pile is obtained. The problem that an existing early warning method for the soft soil around the pile lacks dynamic sensing and combined early warning in the pile-soil interaction process is solved.

The invention discloses a tower footing side slope stability limit balance evaluation method under a lightning impulse condition, which comprises the following steps of: simulating a lightning stroke side slope tower test in a laboratory by inputting a potential sliding surface parameter and a rock-soil body material parameter of a certain side slope; calculating to obtain a conversion coefficient of the stress variation of the potential sliding surface of the side slope and heat generated by lightning impulse current, and further obtaining a calculation formula of the stress variation value of the potential sliding surface of the tower footing side slope of the tower under the lightning impulse condition, and taking the stress variation value of the potential sliding surface of the tower footing side slope of the tower under the lightning impulse condition as an input parameter; according to the method, the stability safety coefficient of the slope is calculated, the stability of the tower footing slope under the lightning impulse condition is evaluated according to the stability safety coefficient, accurate evaluation of the stability of the tower footing slope under the condition that the lightning impulse influences the stability of the tower footing slope is achieved, and the accuracy of slope stability analysis under the extreme weather condition is improved.

A borehole wall spin-shearing device includes a load applying assembly, a soil shearing assembly, and a data acquisition assembly, where the load applying assembly is configured to apply a vertical load and an axial rotational load to the soil shearing assembly; the soil shearing assembly includes a plurality of shear plates; the plurality of shear plates are configured to penetrate into undisturbed soil after being ejected due to the vertical load and then shear the undisturbed soil due to the axial rotational load; and the data acquisition assembly is configured to acquire torque values of the plurality of shear plates during a process of shearing the undisturbed soil. The borehole wall spin-shearing device can directly conduct an in-situ borehole shear test in an exploration borehole with a conventional diameter in China, reducing the cost of drilling. The borehole wall spin-shearing device achieves a high degree of automation throughout the test.

The invention belongs to the field of rock-soil mechanical test equipment, and particularly discloses a shear slip test device for testing mechanical properties of high-temperature fractured rock mass, which comprises a shear test platform, a shear test box, a sound wave emission system, and a temperature control module and a circulating cooling system integrated in the shear test box. The shear test platform realizes independent control of normal force and shear force through a first loading block and a second loading block; the temperature control module and the circulating cooling system can simulate a high-temperature environment and perform a cold and hot cycle test; the acoustic emission system is used for monitoring acoustic emission signals in the rock sample in real time. The device can accurately simulate a high-temperature and cold-hot cycle environment, has high-precision mechanical loading capacity and a multi-parameter monitoring function, provides an effective experimental means for researching the mechanical property and damage mechanism of a high-temperature fractured rock mass, and can be widely applied to the research fields of deep geothermal resource development and enhanced geothermal systems.

The invention provides an analysis method and system for dynamic fracture of a quasi-brittle material. The method is used for solving the technical problem that an existing method is insufficient in dynamic fracture capturing capacity in quasi-brittle materials. The method comprises the following steps: constructing a representative volume element RVE of a quasi-brittle material with two embedded fracture planes; a dual-scale model of the RVE is constructed, the dual-scale model comprises a macroscale sub-model and a mesoscale sub-model, and the crack traction force and the displacement jump increment in the mesoscale sub-model meet the rate-dependent cohesive friction law; identifying the parameters of the dual-scale model; and embedding the dual-scale model into finite element software to simulate the dynamic fracture of the quasi-brittle material. The contained mesoscale crack plane has the key characteristics of the dynamic fracture behavior of the quasi-brittle material, and has remarkable advantages compared with a classical empirical model.

The invention discloses a collapsible loess foundation deformation analysis system and method based on variable monitoring, and relates to the technical field of collapsible loess foundation deformation analys.The collapsible loess foundation deformation analysis method comprises the steps that a structural attenuation model is established, and the structural attenuation model establishes the relation between a structure degree index and compression structure yield stress; calculating a self-weight collapsibility coefficient of the loess under the saturated self-weight action by utilizing a compression curve and a structural attenuation model; monitoring a deformation correlation variable of the collapsible loess area in the foundation; and evaluating the self-weight collapsing deformation of the collapsible loess area in the foundation based on the deformation correlation variable and the self-weight collapsing coefficient. According to the method, the structure degree indexes are used for quantitatively describing the structure of the loess, and the indexes comprise the material composition of the loess and the structure characteristics of the loess of different deposition years. The relation between the yield stress of the structure and collapsing deformation is established, wherein the relation between the yield stress of the compression structure of the loess and the structure degree of the compression structure of the loess and the relation between the void ratio change and the compression stress in the loess compression deformation process are established.

The invention provides a heat-water-force coupling experimental device and a testing method based on dynamic true triaxial electromagnetic Hopkinson bar system loading. The experimental device comprises an X-axis dynamic loading system, a Y-axis lateral anti-seepage loading system, a Z-axis normal static pressure servo control loading system, a seepage system, a temperature control system and a data monitoring and collecting system. According to the device, on the basis of a dynamic true triaxial electromagnetic Hopkinson bar system, a shear loading module, a temperature regulation and control module and a seepage control module are creatively integrated, so that the true working condition of a deep rock mass under the coupling action of dynamic disturbance, osmotic pressure and temperature is simulated. The device breaks through the limitation that a traditional experiment system is difficult to realize multi-field coupling loading under a high-speed shearing condition, and provides an experiment means for dynamic response research of fractured rock mass under a complex multi-field environment.

The invention relates to the field of material testing, and particularly discloses a shear box for simulating lunar soil ring shear testing and a testing device.The shear box comprises a lower box body, an upper box body, an axial loading assembly, a vacuum air channel and a shear seam adjusting mechanism; the testing device comprises a ring shear apparatus and a shear box, the ring shear apparatus comprises a torsional shear measurement and control module, an axial loading measurement and control module and a sensing module, and the sensing module comprises a temperature sensing assembly, an acoustic emission sensor and the like. According to the invention, multi-field coupled lunar soil environment simulation including vacuum, temperature, mechanical loading and the like can be provided, and multi-field collaborative analysis and cross-scale research of lunar soil mechanical behaviors are realized.

The invention discloses a prefabricated pipe pile connection node mechanism character intelligent sensing system and method, and relates to the field of engineering monitoring, the prefabricated pipe pile connection node mechanism character intelligent sensing system comprises the following steps: an intelligent sensing module is used for embedding an intelligent sensing sensor at a corresponding position of a pile body, and the sensor is used for accurately sensing the strain and the inclination angle of a connection node; the data acquisition module is used for acquiring data from a sensor, and the data acquisition module adopts a high-precision data acquisition card and transmits the data to the data analysis and processing module through a built-in data transmission protocol; the analysis and processing module is used for carrying out filtering processing on the collected data, calculating the axial force, the bending moment and the inclination angle at a connecting node through a built-in algorithm, comparing the axial force, the bending moment and the inclination angle with preset parameter values, and carrying out stability checking calculation and prejudging the condition of a pile body; and the feedback and early warning module is used for generating a real-time feedback signal according to a calculation result of the processing and analysis module, displaying the real-time feedback signal to construction personnel through mobile equipment, and giving an alarm according to a preset safety threshold.

The invention provides a large-tonnage slideway beam accurate in-position method and system based on stress monitoring, and relates to the technical field of stress monitoring, and the method comprises the steps: obtaining stress data of a preset position of a slideway beam through a stress sensor disposed at the preset position; obtaining a slideway beam material of the slideway beam; environmental data are obtained through a sensor arranged on a construction site, and the environmental data comprise temperature data and humidity data; determining an allowable stress value according to the slideway beam material and the environmental data; according to the stress data and the allowable stress value, determining a stress uniformity identification result and a stress allowable identification result at the preset position; and according to the stress uniformity identification result and the stress permission identification result, determining whether to adjust the preset position. According to the method, the stress uniformity condition and the maximum allowable stress condition of the slideway beam can be evaluated, and the in-place accuracy of the slideway beam is improved.

The invention belongs to the technical field of civil engineering, and discloses and relates to an open pit coal mine slope multi-physical field action large-scale simulation platform which is used for simulating slope stability tests under various working conditions. Comprising a base, a plurality of box bodies are arranged in the middle of the base from left to right, and a first foundation pit and a second foundation pit are arranged at the bottom of each box body; the base is provided with a box rotating shaft located between the first foundation pit and the second foundation pit. A plurality of lateral overturning oil cylinders are arranged in the first foundation pit; the bottom of the front end of each box body is hinged to the tops of at least two lateral overturning oil cylinders, and the middle of each box body is connected with a rotating shaft fixed to the base. Wherein one box body comprises a forward overturning oil cylinder, a forward overturning base and a forward overturning box body; and the forward overturning oil cylinder is used for driving the forward overturning box body to overturn towards the adjacent box body. The device can realize loading of the open pit coal mine slope under various working conditions, and is reasonable in structure, convenient to operate and high in test precision.

The invention particularly relates to a method for predicting the service life of a boric acid solution corrosion concrete member in a nuclear power plant. The method comprises the following steps: determining boric acid solution accelerated corrosion concrete member test control parameters; based on the boric acid solution accelerated corrosion concrete member test control parameters, boric acid solution accelerated corrosion concrete member tests are carried out in groups; constructing a boric acid solution corrosion concrete member life prediction model based on boric acid solution accelerated corrosion concrete member test data; and predicting the boric acid solution corrosion concrete member service life based on the boric acid solution corrosion concrete member service life prediction model. According to the method, a model for predicting the service life of the concrete member corroded by the boric acid solution is established by considering the water-binder ratio of the concrete, the temperature, the concentration of the boric acid solution and the corrosion time on the basis of research test results of physical properties and macroscopic mechanical properties of the concrete member corroded by the boric acid solution or field actual measurement data; and the service life of the boric acid solution corroded concrete member is predicted.

The invention discloses a large indoor direct shear tester for geotechnical engineering, and relates to the technical field of geotechnical shear tests.The large indoor direct shear tester for geotechnical engineering comprises a sample container system, a shear loading system, a data acquisition control system and a base protection system.The sample container system is formed by splicing a plurality of modular sample containers; the modularized sample container is connected through a detachable connecting fastener, a replaceable lining plate is arranged in the container and is used for adjusting the size and interface conditions of the sample container, and an embedded porous pressure plate is arranged at the bottom of the container and is used for measuring the pore pressure change in the sample seepage process. By installing the base, the protection system and the normal loading system, the function of uniformly applying normal force in the shearing process is achieved, the problem that the test result is affected by eccentric errors in the shearing process is solved, and the precision and stability of the shearing test are improved.

The invention discloses an intelligent identification method for a rock tension-shear rupture mechanism based on acoustic emission RA-AF parameters, and belongs to the technical field of intelligent identification. The method comprises the following steps: carrying out indirect tension test and variable-angle shear test on rock, acquiring RA-AF data of the rock under tension and shear loads by adopting an acoustic emission technology, and respectively constructing RA-AF standard databases corresponding to tension and shear fracture mechanisms based on a DBSCAN clustering algorithm; wherein 4 / 5 is used as training set data, and 1 / 5 is used as test set data. A probabilistic neural network is used for learning RA-AF data feature information of a pulling and shearing fracture mechanism, an intelligent classification model of the pulling and shearing fracture mechanism is established, the accuracy rate of the model is detected, and the model which reaches the detection standard through adjustment is applied to quantitative recognition of the fracture mechanism of the same rock under different static loads. According to the method, the data processing workload of workers can be reduced, and the classification efficiency is improved.

The utility model discloses a tensile shear and stripping test piece sample preparation tool, which belongs to the field of adhesive detection and comprises a bottom plate, a tensile shear sample preparation component and a stripping sample preparation component, and the tensile shear sample preparation component and the stripping sample preparation component are arranged on the bottom plate. The tensile shear sample preparation assembly comprises a first test piece groove and a second test piece groove which are formed in the bottom plate, and the first test piece groove and the second test piece groove are formed in the first direction; the stripping sample preparation assembly comprises two guide stand columns arranged on the bottom plate, a plurality of pressing blocks are arranged between the two guide stand columns in a sliding mode in the second direction, and test piece mounting grooves are formed in the pressing blocks in the third direction; the first test piece groove and the second test piece groove are located between the two guide stand columns, the pressing block is located above the second test piece groove, and the first direction, the second direction and the third direction are perpendicular to one another. The device can be used for simultaneously preparing a tensile shear test piece and a stripping test piece, and the adhesive layer thicknesses of different adhesives can meet the standard requirements by adjusting the pressure.

The invention relates to the technical field of hydrofracture simulation experiments, in particular to a true triaxial hydrofracture fault slippage casing deformation monitoring method and system, and the method comprises the steps: preparing a target reservoir simulation sample; arranging and installing a shaft and a sensor; carrying out a water pressure physical model experiment and recording experiment data; and analyzing and processing the experimental data, and performing quantitative evaluation by combining the final state of the target reservoir simulation sample. According to the method, the shear deformation influence of fault slippage on the shaft casing under the true triaxial hydraulic fracturing condition can be quantitatively evaluated; scientific basis is provided for optimization of fracturing optimization design parameters, and engineering practical significance is achieved for optimization of the horizontal well casing damage prevention and control theory and on-site construction design.

The invention belongs to the technical field of ocean geotechnical engineering, and discloses full-strain range soil body strength characteristic testing equipment and a testing method for simulating a deep sea temperature and pressure environment. The system comprises an integrated probe, a stepping motor, a linear module, a hollow probe rod, a torsion module, a loading platform, a sample box, a water depth simulation system and a temperature control system. The hydraulic source and the temperature controller are used for simulating the deep sea low-temperature and high-pressure environment, the simulation effect is good, soil sample visualization is achieved, static sounding and vane shear tests are combined by designing the integrated probe, the soil permeability coefficient, the consolidation coefficient, the undrained shear strength and the sensitivity are measured, the precision and the efficiency of soil parameter analysis are improved, and the method is suitable for popularization and application. And data complementation, efficiency optimization and precision improvement are realized.

The invention relates to a comprehensive performance verification method for a wear-resistant layer of a turbine blade, and belongs to the technical field of turbine blades, the comprehensive performance verification method comprises a melting performance test, a pressure-resistant performance test, a wear-resistant performance test, a high-temperature hardness test and a tension shear test, and the melting performance test is performed on a welding rod made of a first material; the first wear-resistant layer made of the first material is subjected to a pressure resistance test, the second wear-resistant layer and the third wear-resistant layer made of the first material are subjected to a wear resistance test, the fourth wear-resistant layer made of the first material is subjected to a high-temperature hardness test, and the blade crown wear-resistant layer made of the first material is subjected to a tension shear test. The device has the beneficial effects that a fusion performance test, a pressure resistance test, a wear resistance test, a high-temperature hardness test and a tension shear test are carried out on the welding rod made of the first material, so that the comprehensive performance test on the welding rod made of the first material is realized, and whether the welding rod made of the first material can be used for processing a blade or not is judged; and the machining quality and safety of the blade are ensured.

The invention belongs to the technical field of direct shear-seepage tests of rock joints, and discloses a numerical test method for direct shear-seepage of rock joints under different boundary conditions, which comprises the following steps of: establishing a joint surface numerical model by using finite element software, and performing tests for simulating joint shear mechanical behaviors by applying different boundary conditions. And the contact state and the opening distribution of the joint surface under different shear displacements are obtained, so that the shear stress evolution mechanism of the joint surface is better revealed, and the mechanical behavior of the rough joint surface in the shear process is accurately expressed. According to the method, the evolution law of mechanical properties in the joint shearing process can be reflected, the influence of shearing deformation on the joint seepage characteristics can be reflected, joint opening data distribution is imported into programming software to be processed, a joint seepage numerical model is constructed, then multi-physics field simulation analysis software is imported, and the joint seepage performance is improved. The flow velocity, the osmotic pressure and the streamline distribution characteristics in the flowing process are calculated, so that the joint permeability characteristics are analyzed.

The invention belongs to the technical field of mechanical property testing, and particularly discloses and provides a coal rock sample mechanical property intelligent testing system and method.The coal rock sample mechanical property intelligent testing system comprises a consistency verification module, a test piece dividing module, a density testing module, a triaxial testing module and a report generating module; standardized screening is carried out on the size, morphology and structural integrity of the test piece, physical characteristics are ensured to be unified, individual difference interference is avoided, then density and triaxial testing are integrated, density, triaxial compressive strength and shear strength parameters are synchronously obtained, a multi-dimensional data system is constructed, the problem that in the prior art, parameters are single is solved, and the test efficiency is improved. The method comprehensively supports comprehensive evaluation of coal rock mechanical properties, and meanwhile, by outputting a structured report containing a measured value, an adaptive threshold value, a judgment result and an unqualified item and clearly marking the unqualified item, the limitation that manual secondary processing is needed in the prior art is solved, seamless connection of testing, evaluation and engineering application is achieved, and the engineering application value is improved.

The invention provides a system and method for testing the shear resistance of an anchoring structural plane under water-force coupling, and the system comprises a prestress loading device which provides a prestress for an anchoring body sample, so that the structural plane is provided with a water flow channel with controllable opening degree; the shearing device is used for applying shearing force to the anchoring body sample to enable the structural surface to slide so as to damage the mortar protective layer; the high-pressure corrosion device is used for providing an osmotic pressure environment for the anchoring body sample so that a corrosion solution permeates into the structural surface to corrode the anchor cable, and the data acquisition device is used for monitoring sliding displacement, shearing force, pulling force, water pressure and ion concentration of the structural surface; the anchor cable corrosion damage coefficient calculation device is used for obtaining an anchor cable corrosion damage coefficient in the anchoring structure surface; the residual shear strength calculating device is used for obtaining the residual shear strength of the anchored structural surface after corrosion; and the anchoring body safety evaluation device is used for evaluating the safety state of the anchoring body. The method solves the problem of testing the residual shear strength of the anchoring structural surface considering the corrosion damage of the anchor cable under the synergistic effect of multiple factors.

The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a subsurface erosion particle system mechanical property testing method based on physical state reproduction and dynamic expansion, which comprises the following steps: S1, subsurface erosion test and fine particle collection: filling a sample soil body by using a subsurface erosion tester, and carrying out a seepage action test; s2, lossless sampling and CT image acquisition: carrying out lossless sampling on the residual soil sample after the subsurface erosion test, and acquiring a CT scanning image of a particle system of the residual soil sample; s3, image processing and structural feature extraction: processing the CT scanning image, and extracting structural features; s4, establishing a numerical model: establishing the numerical model to simulate the mechanical properties of the soil body; and S5, three-axis simulation and mechanical property calculation: carrying out a three-axis simulation experiment on the numerical model. According to the invention, high-precision modeling and intelligent analysis of the microstructure and mechanical behavior of the subsurface erosion soil body are realized, and the test efficiency and the reliability of engineering application are remarkably improved.

The invention discloses a high-voltage frequency converter driving load shaft system torsional resonance monitoring method. The method comprises the following steps: arranging an encoder on a shaft system to collect shaft system rotating speed information in real time; inputting the encoder signal into a rotating speed acquisition and processing module in a frequency converter master control system so as to process the encoder signal into a signal format which can be identified by a storage and calculation chip of the frequency converter master control system; inputting the processed encoder signal into a torsion angle calculation and analysis module in a storage calculation chip so as to carry out shaft system torsion angle calculation and torsion angle harmonic analysis; and according to the calculated torsion angle amplitude condition, a torsional vibration alarm module in the storage calculation chip gives an alarm. As a further scheme of the invention, the encoder is an electromagnetic pulse encoder. The method can be used as an online monitoring and alarming means for torsional vibration of a high-capacity fan and water pump load variable-frequency driving shaft system, the problems of system shutdown and the like caused by irreversible fatigue damage of the shaft system due to hidden torsional vibration of the shaft system are solved, and the implementation cost is low.

The invention relates to the field of geotechnical engineering and rock mechanics research, in particular to a bolt-grouting joint shear failure evolution monitoring method and system based on three-dimensional scanning, and the method comprises the steps: carrying out the multi-view three-dimensional scanning of a target rock mass at different load stages, and obtaining a time-sharing three-dimensional point cloud reflecting crack dislocation and surface deformation; and multi-modal data collected by a strain sensor, a vibration sensor and the like are input into a multi-scale feature extraction algorithm to generate automatic regulation and control parameters for the grouting pressure and the load mode. During application, a researcher can dynamically adjust a grouting scheme or a load strategy, and the whole crack propagation process is displayed by using a three-dimensional deformation diagram and a crack distribution diagram, so that the monitoring process is more visual and operable. According to the method, the key damage symptom of the rock mass in the loading process can be captured, the plugging effect of bolting and grouting can be effectively evaluated, and more visual and accurate data support is provided for rock mechanics research and engineering field reinforcement decision making.

The invention relates to the technical field of UHPC (Ultra High Performance Concrete) shear resistance research, and discloses an analysis method for predicting UHPC shear resistance based on a neural network, which is characterized by comprising the following steps: data acquisition and preprocessing, selection of a UHPC test piece for a shear failure experiment, acquisition of damaged image and sound wave data by using an ultrasonic detector and a camera, and calculation of the UHPC shear resistance based on the neural network. Graying processing is carried out on the image data; building and training a model, building a prediction model based on a depth separable convolutional neural network, taking the preprocessed image and sound wave data as input, building a sample data set, and carrying out model training; model verification and optimization: verifying the model by using the test set, evaluating the prediction performance, and optimizing the model according to the verification result; and deploying and applying the model. The analysis method for predicting the shear resistance of the UHPC based on the neural network aims to realize rapid and accurate prediction of the shear resistance of the UHPC prefabricated member by combining image processing and deep learning technologies.

The invention discloses an ionic type rare earth ore body pressurization, permeation and shearing combined test device. The device comprises a shear box, a load system, a dynamic permeation structure, a graded filtration structure, a data assembly and a processing terminal, the load system is used for applying a horizontal load and a vertical load to the shear box; the dynamic permeation structure is used for containing a leaching solution and enabling the leaching solution to flow into the shear box; the graded filtration structure is used for collecting a leaching solution reacted with the rare earth ore body sample and acquiring graded filtration analysis data; the data assembly is used for summarizing monitoring data in the penetration and shearing processes; the processing terminal is used for controlling; the shear box comprises an upper box, a lower box, an upper seepage pressing plate, a lower seepage pressing plate, an upper filter screen plate, a lower filter screen plate, a cover plate, a microporous metal plate and filter paper. According to the invention, the integration of fine simulation and penetration and shear test of the in-situ ore leaching injection-production process is realized, and a test basis can be provided for in-situ ore leaching injection-production parameter design, rare earth ore body stability analysis and disaster risk assessment.