205 results about "Triaxial shear test" patented technology

The invention relates to the technical field of mine safety monitoring, and discloses a roadway surrounding rock stability evaluation method, which comprises the following steps: step 1, collecting roadway surrounding rock geological data, step 2, constructing a three-dimensional geomechanical model, step 3, inverting mechanical parameters, step 4, calculating a stability coefficient, and step 5, outputting an evaluation result. According to the method, rock mass types, structural plane occurrence, crustal stress vectors and permeability parameters are integrally collected through geological radar scanning, drilling coring and crustal stress measuring devices, the problem of model distortion caused by single data in a traditional method is solved, deformation of a stress concentration area is accurately captured by adopting a non-uniform grid division strategy, inversion mechanical parameters are combined, and the method is suitable for large-scale popularization and application. The network is trained by using in-situ direct shear and triaxial test data, the inversion efficiency is improved compared with manual trial and error, the whole surrounding rock fracture process is simulated based on a finite element-discrete element coupling algorithm, plastic zone distribution and a comprehensive index S are output, and automatic judgment of the stability level is realized.

The invention discloses a breakable rock-soil granular material triaxial test simulation method based on a lattice spring-discrete element coupling framework, which comprises the following steps: establishing a triaxial test model rectangular boundary condition, and generating a non-breakable spherical rock-soil granular material in the boundary; replacing the generated non-crushable spherical particle material with rock-soil particles considering particle crushing based on a lattice spring-discrete element coupling frame, and assigning parameters; replacing wall bodies on the two sides of the rectangular boundary condition with a large number of bonded spherical particles to generate a flexible membrane boundary; and applying confining pressure to the boundary of the generated flexible membrane, and carrying out shear simulation. According to the method, the Young modulus and the Poisson's ratio can be matched in a high-precision mode, the heterogeneity of elastic response is reduced, strength degradation and friction characteristics are simulated, and the calculation efficiency is greatly improved.

A deep engineering hard rock true triaxial dynamic disturbance aging fracture testing device belongs to the technical field of rock mechanics tests and comprises a counter-force frame, a pressure chamber and six main stress linear disturbance actuators. The main stress linear disturbance actuator comprises a linear disturbance motor and a main stress hydraulic cylinder; the linear disturbance motor is coaxially and fixedly installed at the outer end of a cylinder barrel of the main stress hydraulic cylinder, a dowel bar is arranged in a central hole channel of a piston rod of the main stress hydraulic cylinder, and a power output shaft of the linear disturbance motor is coaxially and fixedly connected with the dowel bar. According to the utility model, the matching form of a traditional dynamic actuator and a hydraulic oil source is abandoned, the linear motor is introduced into the true triaxial test equipment as a power disturbance source, the long-time dynamic disturbance structure of the true triaxial test equipment is simplified, and the energy consumption of the equipment is greatly reduced after the linear motor is used as the power disturbance source; the maintenance process is simpler, the maintenance cost is greatly reduced, the installation and debugging processes of the linear motor are more time-saving and labor-saving, and no extra floor area is needed.

The invention belongs to the technical field of rock mass performance research, and discloses a method for preparing composite rock with fractures, which comprises the following steps: transforming a cubic ABS (acrylonitrile butadiene styrene) plastic mold, and marking a groove in the center inside the mold for placing a steel plate; for a rock sample with a crack located in the middle of a similar rock, different crack inclination angles, lengths and positions are drawn through Microsoft Visio drawing software, the crack inclination angles, lengths and positions are printed, sheared and pasted to the surface of a mold to determine the positions of the cracks, thin steel sheets heated at high temperature are used for scalding and melting at specific positions of the two sides of the mold, and a reserved opening is obtained, and the steel sheets can be placed in advance before slurry is poured. The rock sample preparation process comprises the steps of mold preparation, slurry preparation, pouring and vibrating, mold removal and maintenance, core drilling and sampling, end cutting and sample polishing. The method for manufacturing the fissure-containing composite rock cylindrical standard test piece for the indoor triaxial test is convenient to operate, high in practicability and accurate in fissure positioning, and can be generally used for preparing fissure-containing composite rock samples.

The invention provides a method for establishing a deep hard rock dynamic disturbance three-dimensional mechanical model, and relates to the technical field of rock mechanical properties and engineering. The method comprises the following steps: carrying out a true triaxial test without power disturbance and a true triaxial test under the action of power disturbance on a deep hard rock taken from a certain tunnel project in the deep part, and recording test data of the whole mechanical behavior process of each test; determining failure modes of the deep hard rocks under different dynamic disturbances by comparing all the tested deep hard rocks; the method comprises the following steps: determining a parameter evolution model of cohesion and an internal friction angle under the dynamic disturbance true triaxial condition by constructing a mechanical model of a deep hard rock under the dynamic disturbance true triaxial condition on the basis of mechanical behavior whole-process test data of the deep hard rock under the dynamic disturbance action and failure modes of the deep hard rock under different dynamic disturbances; according to the method, the mechanical behavior of the hard rock under the influence of multi-source dynamic disturbance can be predicted, and a basis is provided for surrounding rock stability evaluation in the construction process of a deeply-buried hard rock area.

The invention discloses a shear strength parameter determination method considering earthquake action, which comprises the following steps: collecting a soil sample of a research area, air-drying, dispersing the soil sample into single particles, and sieving to obtain the stone content of the soil sample; the method comprises the following steps: preparing a compacted cylindrical sample from a soil sample, and placing the compacted cylindrical sample in a triaxial testing machine for a triaxial test to obtain static strength parameters of the soil sample; collecting seismic magnitude data of the research area, and determining the seismic magnitude of the research area; and according to the stone content, the static strength parameter and the earthquake magnitude, calculating the shear strength parameter of the research area under the earthquake action by adopting a shear strength damage cracking model. Based on PFC numerical simulation software, dynamic triaxial numerical simulation of the accumulation body is carried out and compared with an indoor test result, the change rule and numerical value of the numerical simulation result are close to those of the indoor test result, the parameter error is smaller than 50%, and the reasonability of the established accumulation body sample model and the calculated dynamic strength parameters is verified.

The invention discloses a rock shear seepage coupling true triaxial test system, which relates to the technical field of rock mechanical tests, and comprises a host, a sigma 1 / sigma 2 direction loading module, a sigma 3 direction confining pressure module, a pressure chamber auxiliary system, a sample clamp, a pore water seepage system, a temperature system, a control module and a data acquisition and processing module, through servo closed-loop linkage double-pump loading in the sigma 1 / sigma 2 direction, synchronous output of the double pumps and coordination of pressure supply of the two oil cylinders by the controller, a strain correction algorithm is combined, stability of a stress loading center is guaranteed, strain measurement accuracy is improved, confining pressure is accurately controlled in the sigma 3 direction through a double-balance pressure chamber and a pressure regulation algorithm, and the stress measurement accuracy is improved. The pressure chamber is in full-automatic operation, manual steps are omitted, errors are reduced, efficiency is improved, a stress-free blank angle clamp eliminates friction interference, a seepage system supports a double-loading mode, a control module achieves multi-control-mode impact-free switching, a data processing module is combined with an elastic modulus calculation algorithm, rock mechanical parameters are accurately obtained, and the multi-field coupling test requirement is met.

The invention provides a high-stress rock mass disturbance catastrophe real-time early warning method based on a fracture comprehensive signal, which belongs to the technical field of geotechnical engineering, and constructs a comprehensive acoustic parameter ASCP by fusing various parameters such as amplitude, dominant frequency, energy distribution, crack fractal characteristics, rock mass fracture event density and the like in an acoustic emission signal. The calculation process is combined with contribution weights of different parameters to the destruction stage, and weight values are jointly calibrated through data analysis. On the basis of a large amount of engineering field monitoring and indoor true triaxial test data, the evolution law of the ASCP in the rock mass damage process is analyzed, multiple early warning thresholds of an ASCP evolution curve starting early warning threshold and an ASCP catastrophe early warning threshold are provided, and the early warning accuracy and timeliness are improved. According to the early warning method, various parameters of sound signals are integrated, a multi-threshold early warning method is established, the contribution degrees of various main sensitive parameters of high-stress rock mass disturbance damage sound emission are integrated, and the early warning accuracy, timeliness, high efficiency and economical efficiency are improved.

The invention provides a high-temperature and high-pressure rock triaxial and hydraulic fracturing test system capable of loading a plurality of samples in different bins, which comprises a fracturing test bin arranged in a thermal insulation bin, a computer display, control and storage system is arranged outside the fracturing test bin, and the fracturing test bin is controlled by signals of a high-temperature heating and control system, an axial pressure loading and control system, a confining pressure loading and control system, a fracturing fluid injection pump and a control system; the computer display, control and storage system is respectively in communication connection with the high-temperature heating and control system, the axial pressure loading and control system, the confining pressure loading and control system, the fracturing fluid injection pump and control system as well as an acoustic emission monitoring system and an injection pressure monitoring system which are arranged in the fracturing test bin; the fracturing test cabins are arranged in different cabins; the system comprises a high-temperature and high-pressure triaxial test method and a high-temperature and high-pressure hydraulic fracturing test method. The device has the advantages that the test efficiency is improved, the test period is shortened, a plurality of rock core samples can be tested at the same time, and a visual contrast test can be formed.

The invention relates to a method for simulating a complex earthquake load in a triaxial test, and belongs to the field of geotechnical engineering indoor test methods. The invention mainly overcomes the defects in the prior art, and provides a simulation method for complex earthquake load in a triaxial test, which comprises the following steps: acquiring a near-field strong earthquake record, and carrying out baseline correction and filtering processing on the near-field strong earthquake record; decomposing and synthesizing the near-field strong earthquake record; performing time-history conversion on the near-field strong earthquake record, and determining experimental parameters; preparing a soil-rock mixture sample, and saturating the sample; performing an indoor triaxial test on the saturated sample according to the determined experimental parameters; calculating the correlation between the input waveform and the output waveform according to the test result; and analyzing typical dynamic characteristics of the soil-rock aggregate under the action of the near-field strong earthquake according to a test result. The invention provides a method for analyzing test data under the action of earthquake load, and provides an indoor triaxial test method for carrying out research on dynamic characteristics of a rock-soil body by near-field strong shock of an active fault zone.

The invention relates to the technical field of rock indoor loading tests, in particular to an intelligent true triaxial mechanical test system and method based on parameter self-adaptation, and the method comprises the following steps: S1, testing a known rock sample based on known test data, historical parameter data, historical operation data, historical experiment data and rock characteristic data of the rock sample are obtained; s2, marking corresponding time points for the historical parameter data and the historical experiment data based on the operation time data to obtain a parameter subset and an experiment subset; s3, analyzing the parameter subset and the experiment subset to obtain an intervention relation; s4, determining a data relationship between the rock characteristics and test parameters of true triaxial test equipment to obtain a basic parameter relationship; s5, testing and data monitoring are carried out on a rock sample to be tested, rock experiment data are obtained, judgment and self-adaptive parameter adjustment are carried out based on the intervention relation, and the reliability and accuracy of a test result are guaranteed while the analysis rate is increased.

The invention discloses a true triaxial test device and test method capable of realizing arbitrary rotation of principal stress, and belongs to the technical field of geotechnical engineering.The true triaxial test device comprises a shear stress device, the shear stress device comprises a shear stress pressure head used for being connected with the surface of a sample, and the shear stress pressure head is connected with two shear stress applying systems; the shear stress applying system applies shear stress parallel to the surface of the sample to the sample, and the directions of the two shear stresses are vertical; the main stress device is connected with the shear stress pressure head, and the main stress device applies pressure perpendicular to the surface of the sample to the sample. According to the invention, random rotation of the principal stress can be realized through the shear stress device, so that the direction and size of the principal stress applied to the rock sample can simulate a real path to continuously change, and the deformation fracture behavior in the rock mechanical bearing process can be more accurately obtained; and a technical support is provided for correctly and accurately evaluating the bearing characteristic, the fracture characteristic and the instability mechanism of the rock.

The invention relates to the technical field of geotechnical engineering intelligence, in particular to a multi-field coupling intelligent triaxial test method and system combined with machine learning, and the method comprises the following steps: initializing a test device, and establishing a material parameter prior distribution function; defining a target test path and obtaining a target control sequence; acquiring real-time test data through a multi-source fusion sensing array, and preprocessing the real-time test data to obtain multi-dimensional feature fusion data; establishing an online parameter identification module to obtain real-time correction material parameters; establishing a heat-water-force multi-field coupling prediction model to obtain an optimal control sequence; acquiring latest test data, and performing rolling optimization on the model to establish a lightweight control model; and generating an intelligent control instruction to realize self-adaptive intelligent control of the triaxial test. According to the invention, through combination with machine learning, the spanning of the triaxial test from experience control to intelligent control is realized, and an intelligent technical means is provided for the research of the multi-field coupling characteristic of the geotechnical material.

The invention discloses a visual seepage test device and method for shear fracture of a rock structural surface under true triaxial. The visual seepage test device comprises a fixed base, a lower shear box, an upper shear box, a seepage water inlet pipe, a seepage water outlet pipe, a seepage water inlet shear head and a seepage water outlet shear head, the fixed base is connected with a normal loading block of a true triaxial testing machine through pin nails, the lower shear box is fixed on the fixed base, the upper shear box and the lower shear box are oppositely arranged, and the seepage water inlet shear head and the seepage water outlet shear head are respectively embedded into the lower shear box and the upper shear box to form a water injection cavity I and a water injection cavity II; after the lower shearing box and the upper shearing box are closed, a closed sample cavity for clamping a rock sample and a transparent block is formed, and meanwhile, the water injection cavity I and the water injection cavity II form a seepage cavity. According to the device and the method, the visual shear simulation of the rock mass structural surface under the multi-field coupling environment of true three-dimensional stress-high osmotic pressure-chemical corrosion and the like is realized.

The invention relates to the technical field of rock mechanics true triaxial tests, in particular to a rock cylinder sample true triaxial test analysis method which comprises the following steps: applying a point load to the cylindrical surface of a cylinder sample, performing integration by using a linear superposition principle, and calculating an analytical solution of an internal stress field in the circular surface of the rock cylinder sample; applying a symmetry plane load to the cylindrical surface of the cylinder sample, and calculating an internal stress field of the circular surface of the cylinder sample under the symmetry plane load by using an analytical solution; setting a constraint condition of a stress state similar region, calculating a relation function between symmetrical surface loads in a corresponding loading mode, and determining the relation function as a linear gradient loading mode; and performing finite element analysis on the cylindrical sample of the rock, and verifying the feasibility of the linear gradient loading mode determined by the analytical solution. According to the invention, true triaxial test analysis of the cylinder sample is realized, the internal stress state of a larger area of the sample is ensured to be similar, and the problems of boundary effect, friction effect, fluid channeling and the like of a cubic sample are avoided.

The invention belongs to the technical field of geotechnical engineering and rock mechanics testing, discloses a stress-strain mixed control-based rock stable failure testing method, and aims to solve the problem that a stress path cannot be maintained and brittle failure cannot be inhibited simultaneously after rock peak strength is detected in an existing true triaxial test. The method comprises the following core steps: firstly, determining a target stress state and a strain growth rate threshold value; then hydrostatic pressure loading is carried out; loading and unloading at a fixed proportional rate in a stress control mode; and when the strain rate reaches a threshold value, switching to a stress-strain hybrid control mode, converting the maximum principal stress direction into strain control to stabilize the damage process, and dynamically coordinating stresses in the other two directions based on real-time feedback to enable the whole damage process to maintain a preset stress path all the time. According to the invention, the complete and stable test of the pre-peak-post-peak mechanical behavior of the rock under any complex stress state can be realized, and a key technical support is provided for accurately verifying the strength criterion and researching the failure mechanism.

The invention relates to the technical field of data analysis, in particular to a rock shear strength prediction method and system based on an improved machine learning algorithm. The invention discloses a rock shear strength prediction system based on an improved machine learning algorithm. The rock shear strength prediction system comprises a data acquisition module and a rock shear strength analysis module. According to the method, the shear strength of the rock is predicted through the longitudinal wave speed, the density, the uniaxial compressive strength and the uniaxial tensile strength which are easy to obtain, complex work of a triaxial test can be not needed, a physical embedded input layer is arranged in a set rock shear strength analysis model, input features are expanded through priori knowledge of a physical rule, and the shear strength of the rock is predicted. The problem of low prediction accuracy caused by data sparsity is solved, so that the prediction is more accurate; and a knowledge enhancement adjustment layer is also arranged, and feature enhancement is carried out by taking rock shear strength prediction modes in different scenes as priori knowledge, so that the accuracy of rock shear strength prediction can be improved on the premise of interpretability.

The invention relates to the field of geotechnical engineering, in particular to an undisturbed soil body sample saturation method and application of the undisturbed soil body sample saturation method in an indoor triaxial test, according to the method, light white oil W2-40 is adopted as a saturation material to replace pure water for soil body saturation, the basic physical index of the light white oil W2-40 is close to the index of the pure water to the maximum extent, and the light white oil W2-40 can be used for soil body saturation. And in the aspect of chemical property, chemical reaction with various inorganic matters / polar molecules in the soil body is avoided, so that the problem of structural damage of the soil body can be fundamentally solved, and the most real strength index can be obtained through an indoor triaxial test for guiding engineering application. And the light white oil W2-40 has no danger and is high in operability.

This invention discloses a temperature-compensated seepage-shear coupling true triaxial testing apparatus and control method. The apparatus includes a pressure chamber, a shear box, a temperature control system, a pressure application system, and a temperature-displacement corrector. The shear box is housed within the pressure chamber. The temperature control system includes a heat transfer jacket, multi-point thermometers, and a temperature controller. The heat transfer jacket is fitted over the shear box, and the multi-point thermometers are located within the cavity. The pressure application system includes a confining pressure loading device, a pressure head, and a pressure controller. The confining pressure loading device injects a confining pressure medium into the pressure chamber, and the pressure head applies a force to the shear box. The temperature-displacement corrector is electrically connected to the temperature control system and the pressure application system. This apparatus features a temperature control system to precisely regulate the temperature during the test, thereby simulating deep environments at different temperatures. Furthermore, the temperature-displacement corrector dynamically corrects the force applied by the pressure application system, reducing additional forces caused by thermal expansion or contraction and improving stress control accuracy.

This invention relates to the field of deep learning technology, specifically to a numerical simulation method for true triaxial tests of coarse-grained soil materials based on principal stress effects. The method includes the following steps: acquiring three-dimensional geological parameters and boundary condition data of the coarse-grained soil material; and constructing a true triaxial finite element simulation model of the coarse-grained soil based on the three-dimensional geological parameters and boundary condition data. This invention utilizes a loading increment step size for trial calculations and calculates the reward function value based on the convergence state and iteration count of the trial calculation results to update the network parameters, enabling the control strategy to continuously evolve through interaction with the environment. This allows for the identification of dangerous regions with highly nonlinear constitutive relations or near-singular stiffness matrices. In these regions, the step size is automatically reduced to ensure computational convergence, while in stable regions, the step size is increased to improve computational efficiency. This solves the problem that traditional fixed step sizes or simple adaptive step sizes easily lead to computational divergence or excessive iterations under complex stress paths.

The invention discloses a true triaxial test device for rock heat conduction parameter in-situ measurement under a controllable temperature-stress coupling condition. The device comprises a triaxial pressure chamber, a temperature adjusting system, a double-electric servo loading system and an automatic control unit, the temperature adjusting system tightly surrounds the outer side wall of the triaxial pressure chamber, and the temperature applying value of the temperature adjusting system ranges from 10 DEG C to 150 DEG C; an upper seat and a base are arranged at the upper end and the lower end of the triaxial pressure chamber respectively, and a test space is defined by the triaxial pressure chamber, the upper seat and the base; the upper end of the side wall of the testing space is provided with an exhaust channel and a temperature sensor channel which are communicated with the outside from inside to outside, and the lower end of the testing space is provided with an oil conveying pipeline and a flat cable channel. The device has the advantages of being simple in structure, convenient to use and high in precision. The invention further discloses a method of the true triaxial test device for in-situ measurement of the heat conduction parameters of the rock under the controllable temperature-stress coupling condition.

The invention discloses a test device and method for simulating fracture of a mine earthquake source. The method comprises the following steps: putting a rock sample into the test device and mounting the test device to a triaxial testing machine; a loading method is determined according to the fracture type of the mine earthquake source needing to be simulated, a triaxial testing machine is used for applying load, and if pressure or tension needs to be applied to the rock sample, the tension or pressure is applied to the inner frame to drive the upper clamping part and the lower clamping part to apply required stress to the rock sample; when shear force needs to be applied to the rock sample, pressure is applied to the two shear stress loading parts at the same time, then the lower clamping part is driven to move along the horizontal sliding groove relative to the upper clamping part, the needed shear force is applied to the rock sample, and a compression-shear composite fracture or tension-shear composite fracture test is achieved. The fracture processes of different mine earthquake sources are effectively simulated, so that the acoustic emission data corresponding to the fracture processes of the different mine earthquake sources are obtained, and data support is provided for revealing fracture evolution mechanisms of the different earthquake sources and disaster source early warning.

The invention relates to the technical field of geotechnical engineering tests, in particular to a modular three-way confining pressure seepage loading box and a triaxial test system and method. The loading box comprises an outer box body, a loading seepage assembly and a force transmission assembly; the outer box body is internally provided with a sealing chamber for accommodating a test block, the outer wall of the outer box body is provided with a seepage interface communicated with the sealing chamber, and the top surface and the side surface of the outer box body are provided with loading holes; the loading seepage assembly is arranged between the test block and the outer box body and comprises a bearing plate and a loading plate, the bearing plate and the loading plate are respectively divided into a seepage plate and a non-seepage plate, the inner end face of the seepage plate is provided with a seepage channel, and the inner end face of the non-seepage plate is a plane and is in sealing contact with the test block; the force transmission assembly is installed on the loading hole of the outer box body, and the inner end of the force transmission assembly abuts against the loading plate. According to the loading box, three-way confining pressure seepage coupling tests under various working conditions are carried out with lower cost and higher flexibility on the premise that core triaxial equipment is not transformed.

The invention provides a static and dynamic triaxial test method and system for realizing an ultralow confining pressure environment, and belongs to the technical field of geotechnical engineering. The method comprises the steps that a triaxial test system is assembled, the triaxial test system is provided with a loading space so as to conduct triaxial loading on a sample, and the sample comprises an elastic sample and a soil body sample; the elastic sample coated with the latex film is arranged in a loading space for triaxial loading; acquiring a strain and stress relationship of the elastic sample coated with the latex film so as to acquire a correction relationship between the latex film and the deformation of the sample; the soil body sample coated with the latex film is arranged in a loading space for triaxial loading; in the process of obtaining the strain and stress relationship of the soil body sample coated by the latex film, the stress of the soil body sample is corrected according to the correction relationship between the latex film and the deformation of the sample. The triaxial test method provided by the invention can reduce the influence of the latex film on the mechanical behavior of the soil body sample so as to obtain a more accurate strain and stress relationship of the soil body sample.

The application discloses a variable-angle triaxial test device for simulating cross-tunnel excavation and considering external disturbance, which comprises a counterforce frame, a hydraulic loading module, a vertical disturbance module and a variable-angle triaxial test module arranged on the counterforce frame, lateral confining pressure is applied through first and second horizontal loading oil cylinders, vertical load is applied through a vertical loading oil cylinder, until a set stress state is reached, vertical disturbance to the rock sample is formed by vertically moving the disturbance block along the slide rail, and cross-tunnel excavation simulation is performed on the rock sample through the excavation hole. In the case of realizing the conventional six-surface loading true triaxial test, cross-tunnel excavation is simulated, and disturbance can be applied in the vertical direction, thereby realizing single-hole, cross-double-hole excavation of the rock sample under the true triaxial loading condition and stability analysis of the rock sample under vertical disturbance after the excavation is completed.

The utility model provides a rock core testing device based on an expanding agent. The rock core testing device comprises a filling body, an adjusting flow guide structure, a sleeving assembly and a pressure sensor. The filling body is arranged in a drill hole of the rock core and is used for filling the expanding agent; the adjusting flow guide structure communicates with the filling body and is used for adjusting the position of the filling body in the drill hole and conducting flow guide on the expanding agent; the sleeving assembly is arranged on the periphery of the rock core, and the sleeving assembly comprises an acoustic emission sensor used for monitoring sound production of the rock core; the multiple pressure sensors are arranged on the pouring body at intervals around the central axis of the pouring body and used for monitoring the expansion cracking stress of the rock core. The utility model provides a rock core testing device based on an expanding agent, and aims to solve the problem that in the prior art, a triaxial test is adopted to carry out a stress test on rock in a laboratory, and the state of a rock sample is changed, so that an experimental result is inaccurate.

The application belongs to the technical field of road engineering and relates to a static pressure demolding integrated geotechnical triaxial shear sample static pressure forming device and method. The device comprises a lower support module, a sample containing module, a force transmission module and a demolding elongation middle section. The lower support module comprises a static pressure demolding support, a sample containing barrel limiting hole penetratingly arranged at the top of the static pressure demolding support and a static pressure bearing table detachably arranged at the sample containing barrel limiting hole. The sample containing module comprises a sample containing barrel provided with a through hole communicating with the sample containing barrel limiting hole. The force transmission module is arranged at the upper opening of the through hole and used for applying static pressure to the soil sample to be statically pressed. The demolding elongation middle section is used for abutting against the force transmission module after the static pressure bearing table is removed from the sample containing barrel limiting hole, so as to push the geotechnical triaxial test sample out of the sample containing barrel limiting hole. Compared with the prior art, the application has the advantages of simple sample preparation, scientific method, small mold deformation and strong economy.

The present application relates to the field of testing and numerical analysis control technology, and in particular to a simulation method, apparatus, equipment, medium, and program for a true triaxial test. The method comprises: obtaining a test target for the true triaxial test; determining a specimen based on the test target and applying a preset axial strain increment to the specimen; collecting the true axial stress value, the true longitudinal stress value, the true transverse stress value, and the axial strain of the specimen; identifying a stress control target and a drainage control target within the test target, calculating a transverse stress target based on the true longitudinal stress value and the true axial stress value, generating a strain control matrix based on the stress control target, the drainage control target, the true axial stress value, the true longitudinal stress value, and the axial strain; and controlling the specimen to apply strain increments in three directions based on the strain control matrix to obtain simulation results of the true triaxial test. This method solves the problem in related arts that the simulation model for true triaxial testing cannot meet the requirements of various drainage conditions, resulting in low applicability and practicality.

The invention discloses an acoustic emission monitoring clamp box for disturbing a true triaxial test and a use method of the acoustic emission monitoring clamp box. The acoustic emission monitoring clamp box comprises a box body, a sensor mounting assembly, a sample fixing assembly, a sealing assembly and an anti-interference assembly, the box body is of a hollow cubic structure, openings are respectively formed in six surfaces of the box body, and the sensor mounting assembly and the sample fixing assembly are respectively mounted at the openings of the box body; the sealing assembly is used for enhancing the sealing performance of the box body, and the anti-interference assembly is used for reducing external interference; the side wall of the box body is provided with a cable hole with a rubber sealing ring. By arranging the sensor mounting assembly, stable mounting and position adjustment of the acoustic emission sensor can be realized, good contact between the acoustic emission sensor and the sample is ensured, and the accuracy of a monitoring signal is improved. The sample fixing assembly can adapt to samples of different sizes, has a good fixing effect, prevents the samples from sliding in the test process, and ensures smooth proceeding of the test.

The utility model provides a dynamic triaxial test sample preparation device which comprises a sample hitting cylinder, a plurality of first glass sheets are arranged in the sample hitting cylinder, a protective ring, a first cylinder hoop and a second cylinder hoop are arranged on the peripheral side of the sample hitting cylinder, a plurality of pull blocks are arranged on the side face of the sample hitting cylinder and correspond to the second cylinder hoop, a plurality of second glass sheets are arranged in the protective ring, and the first cylinder hoop and the second cylinder hoop correspond to each other. A compaction device is arranged in the sample compaction barrel, the compaction device comprises a pressing plate and a sliding shaft, scales are arranged on the sliding shaft, a connecting plate is arranged in the pressing plate, and a plurality of inserting blocks are arranged on the lower side of the connecting plate. According to the utility model, the protective ring, the first cylinder hoop and the second cylinder hoop are arranged on the peripheral side of the sample striking cylinder, and the pull block is arranged on the side surface of the sample striking cylinder, so that the stability of the sample striking cylinder can be ensured, and the sample striking cylinder can be disassembled through the pull block, so that the demolding is convenient, the first glass sheet is arranged in the sample striking cylinder, and the second glass sheet is arranged in the protective ring; the compaction degree of the soil sample can be observed through the first glass sheet and the second glass sheet.