33 results about "Deformation modulus" patented technology

The invention provides a roadbed dynamic compaction construction quality control method and system based on rammer dynamic response. The control method comprises the following steps that an acceleration signal of a rammer in the current ramming process is obtained; data processing is carried out on the acceleration signal of the rammer, a plurality of key parameters used for predicting the dynamic deformation modulus are obtained, and the data processing comprises filtering processing, time domain analysis and frequency domain analysis which are carried out in sequence; on the basis of the multiple key parameters and a predetermined dynamic deformation modulus prediction model, the dynamic deformation modulus of the tamping point completing the current time of tamping is obtained; and comparing the dynamic deformation modulus of the tamping point with a set dynamic deformation modulus design value, and sending a tamping stopping prompt or a tamping continuing prompt based on a comparison result. According to the control method provided by the invention, the dynamic compaction construction is subjected to quality control based on the acceleration signal obtained in real time and the dynamic deformation modulus prediction model, so that the uniform compaction of the roadbed is ensured, and the construction efficiency and the construction quality are improved.

The invention discloses a landslide construction simulation method based on finite elements, particularly relates to the field of construction simulation, and realizes whole-process dynamic simulation through GTS-NX software. Firstly, a three-dimensional finite element model is established based on geological exploration data, a Mohr-Coulomb elastic-plastic constitutive model is adopted, and the bulk modulus and the shear modulus are calculated through the elastic modulus and the Poisson's ratio. The initial ground stress is simulated by adopting a self-weight stress field method, and the initial displacement influence is eliminated by adopting a displacement difference method. In construction process simulation, the unit passivation / activation technology is adopted to accurately reproduce the excavation and support time sequence, and cyclic calculation of excavation-stress release-support-balance is achieved. In nonlinear analysis, superposition of an elastic stress field and a plastic stress field is considered, and an unloading influence factor is introduced to correct anisotropy of a deformation modulus. A safety coefficient is calculated through a strength reduction method, a multi-working-condition evaluation system is established, a monitoring data fusion and parameter inversion mechanism is developed, and a three-level early warning system is formed.

The invention discloses a brittleness evaluation method and device based on rock uniaxial compression damage evolution characteristics, and belongs to the technical field of rock mechanics. The method comprises the following steps: determining a rock damage evolution curve by using a deformation modulus attenuation method based on a stress-strain curve; determining a peak strain according to the peak stress of the stress-strain curve, and determining a pre-peak damage variable corresponding to the peak strain according to the rock damage evolution curve; fitting the rock damage evolution curve to obtain a theoretical damage evolution equation of the rock sample; solving a first-order derivative of the theoretical damage evolution equation, and determining a maximum damage evolution rate and a corresponding strain value according to a peak point of the first-order derivative; and calculating the brittleness evaluation index of the rock sample by using a formula. According to the method, the rock brittleness evaluation index is established by comprehensively considering the rock pre-peak damage variable, the rock post-peak damage evolution rate and the peak strain from the angle of damage evolution characteristics of the whole rock compression damage process, and the method has reasonability and reliability and can be applied to engineering practice.

The invention discloses an equivalent deformation modulus calculation method and system for a complex uneven rock mass and a medium. Relates to the technical field of rock engineering. The method comprises the following steps: partitioning according to geological information of rock masses and counting proportions, then respectively carrying out sound wave testing on the rock masses in different regions to obtain single-hole sound wave velocities, and calculating deformation moduli of the rock masses in each region by utilizing a correlation relationship between the single-hole wave velocities and the deformation moduli; a mixed equivalent model of strain coordination and stress coordination is constructed based on the rock mass strain energy proportion so as to calculate the equivalent deformation modulus of the special uneven rock mass; a new thought is provided for obtaining deformation modulus parameters containing multiple types of altered rocks, meanwhile, a targeted investigation and test scheme is provided, and an important basis is provided for design of rock mass slopes, caverns and the like.

The present invention relates to a quantitative evaluation method for the rockburst proneness of surrounding rock considering the excavation disturbance effect. The basic quality grade, geological strength index, and uniaxial compressive strength of intact rock of the surrounding rock are directly obtained according to the engineering geological exploration data; preliminarily judge whether the surrounding rock has the proneness to rockburst; judge the on-site acoustic wave test conditions of the surrounding rock. If the conditions are not met, the damage factor characterizing the damage degree of the surrounding rock is determined according to the Hoek-Brown strength criterion in combination with the damage situation of the surrounding rock after excavation on-site; if the conditions are met, the acoustic wave velocities at different depths on the surface of the surrounding rock are obtained, and the ranges of the damaged area and the original rock area are determined; the deformation modulus of the rock mass in the original rock area is determined; the rockburst proneness of the rock mass in the original rock area and the damaged area is evaluated; the present invention aims to solve the problem of the cumbersome evaluation process for the rockburst proneness of surrounding rock with different degrees of damage caused by the excavation disturbance effect, so as to realize the rapid evaluation of the rockburst proneness of the surrounding rock.

The invention relates to the technical field of testing, and particularly discloses a drop hammer type dynamic deformation modulus testing device and method, and the device comprises a measuring unit which is used for measuring the dynamic deformation modulus data during the impact of an impact hammer; the load guiding unit is used for periodically releasing the impact hammer to the impact platform; the lifting unit is used for continuously conveying the impact hammer at the releasing end of the load guiding unit to the throwing end of the load guiding unit; the unloading unit is used for transferring the impact hammer at the release end of the load guide unit to the input end of the lifting unit; the loading unit is used for transferring the impact hammer at the output end of the lifting unit to the throwing end of the load guiding unit; the released impact hammer is continuously lifted to the throwing end of the load guide unit by using the continuously moving lifting piece, so that continuous throwing of the impact hammer can be realized, and compared with a traditional operation process of reciprocating releasing and lifting of a single impact hammer, the dynamic deformation modulus testing efficiency can be effectively improved.

The invention relates to the field of surrounding rock stability control of deep-buried roadway engineering, in particular to a surrounding rock stability control method based on a rigidity coupling mechanism, which comprises the following steps: measuring rock physical and mechanical parameters, investigating joint fissures in an engineering area, obtaining rock mass quality grades, calculating the deformation modulus of the rock mass in the engineering area, and designing an active support of the rock mass in the engineering area. And calculating the surrounding rock deformation modulus after supporting by combining the rock deformation modulus, and carrying out passive supporting design on the rock in the engineering area according to the surrounding rock deformation modulus after active supporting. By calculating the overall deformation modulus of surrounding rock after supporting and designing parameters such as passive supporting concrete proportion, an active supporting system and a passive supporting system have the same or similar deformation stiffness, and it is ensured that the two supports can synchronously coordinate deformation and share loads together; the risks of stress concentration and one-by-one failure of the supporting units caused by rigidity difference are effectively avoided, and the supporting reliability is improved.

The invention discloses a deep cutting rock high slope unloading damage dynamic evaluation method. The method comprises the following steps: determining an excavation range of a deep cutting rock high slope, determining physical and mechanical parameters of the deep cutting rock high slope, testing wave velocity values and deformation moduli at different positions of the high slope, and determining a reference wave velocity value when the deep cutting rock high slope is not damaged and a reference deformation modulus when the deep cutting rock high slope is not damaged; establishing a deep cutting rock high slope unloading area range determination model with coupling of an acoustic wave test and a drilling elastic modulus test; determining the range of the unloading damage area of the deep cutting rock high slope; calculating an unloading damage comprehensive evaluation coefficient value; and evaluating according to the calculated unloading damage comprehensive evaluation coefficient value of each coordinate point. According to the method, the single evaluation of the unloading damage of the deep cutting rock high slope in the past can be broken through, the unloading damage factors caused by engineering disturbance, rock mass degradation and environmental evolution are added, the evaluation system is more comprehensive, and quantitative evaluation of multi-factor coupling can be realized.

The application discloses a tunnel full-face surrounding rock deformation testing method and system, and relates to the technical field of geotechnical engineering, and comprises the following steps: driving a force sensor on a pre-constructed annular guide rail to rotate and position a target test point pair, and applying radial pressure to both ends of the force sensor, wherein the force sensor is arranged radially along the annular guide rail, and error compensation learning is further included after the rotation and positioning; collecting deformation data of the target test point pair, and obtaining a deformation modulus of the target test point pair through data analysis; testing each test point pair on the annular guide rail, constructing a deformation modulus distribution field according to a test result, obtaining a deformation modulus spatial distribution map through optimization correction, and determining a supplementary measurement position. The application is used to solve the problems of low efficiency and insufficient self-adaptation of a traditional tunnel surrounding rock deformation modulus testing method.

The invention relates to the technical field of intelligent sensing systems, and discloses a method and a device for detecting the bearing capacity of a pavement engineering construction material, and the method comprises the steps: synchronously collecting a mixed signal and a pure noise signal through a main measurement sensor and a reference noise sensor, constructing a multi-dimensional observation matrix, and carrying out the centralization and whitening preprocessing, thereby obtaining the bearing capacity of the pavement engineering construction material. And blind source separation is carried out by adopting an independent component analysis algorithm based on maximized non-Gaussian property, a target bearing capacity response signal with a super Gaussian characteristic is identified according to a kurtosis value of each source signal component, and then a dynamic deformation modulus is calculated. The system comprises a sensor array module, a synchronous acquisition module, a data processing module based on FPGA hardware acceleration and a result output storage module. According to the invention, strong coherent vibration noise can be effectively suppressed, signal details are completely reserved, and high-precision and real-time bearing capacity detection is realized.

The invention relates to a soft layer belt deformation modulus selection method, which comprises the following steps that soft layer belts are classified, measuring points are arranged, and it is ensured that each classified soft layer belt has a preset number of measuring points; carrying out a bearing plate test on the rock mass below the measuring point to obtain a deformation modulus value; carrying out a bearing plate test in a vertical layer belt direction on the test point of the soft layer belt to obtain a corresponding comprehensive deformation modulus value; measuring the thickness of the soft layer of the measuring point, and calculating to obtain the thickness of the rock mass under the measuring point participating in the testing; based on a common bearing principle, obtaining a deformation modulus calculation formula of the soft layer belt, and substituting a known quantity to obtain the deformation modulus of the soft layer belt; according to a deformation modulus calculation formula of the soft layer belt, calculating to obtain a stress deformation modulus value of the soft layer belt at the measuring point; and establishing a soft layer belt deformation modulus valuing principle, and determining a geological suggested value of the soft layer belt deformation modulus of the type according to the average value of the deformation moduli of the measuring points of the same type.

The invention relates to a staggered belt deformation test method, which comprises the following steps of classifying soft layer belts according to engineering characters, and arranging a preset number of test points in each type of soft layer belts; carrying out a rigid bearing plate test to obtain a test deformation curve; classifying the deformation curves, and establishing a deformation modulus calculation principle for different curve types; calculating a deformation modulus value based on the test deformation curve obtained by each test point; statistical analysis is carried out according to the soft layer belt character classification and the deformation modulus result, and the average deformation modulus corresponding to the soft layer belt type is obtained; according to the test method for the dislocation belt deformation test, the characters and the test curve of the soft layer belt are finely classified, and the obtained result is more reliable.

The invention discloses a simplified calculation and analysis method, device and system for stratum strength and settlement, and the method comprises the steps: S1, taking unsaturated soil as a test object, taking natural density as a test index, and obtaining the total stress strength of the introduced natural density by constructing the relationship between the natural density and an internal friction angle and the cohesive force; s2, by taking unsaturated soil as a test object and the natural density as a test index, obtaining a stress-strain constitutive model based on the natural density; and S3, by taking the unsaturated soil as a test object and the natural density as a test index, calculating the compression deformation of the unsaturated soil introduced with the natural density according to the relationship between the natural density and the deformation modulus and based on a load test s-p curve. By the adoption of the technical scheme, foundation strength and deformation analysis is simplified.

The present invention provides a method and system for controlling the quality of roadbed dynamic compaction construction based on the dynamic response of a rammer. The control method includes the following steps: obtaining the acceleration signal of the rammer during the current tamping process; performing data processing on the acceleration signal of the rammer to obtain multiple key parameters for predicting the dynamic deformation modulus, wherein the data processing includes filtering processing, time domain analysis, and frequency domain analysis performed in sequence; obtaining the dynamic deformation modulus of the tamping point that has completed the current tamping based on the multiple key parameters and a predetermined dynamic deformation modulus prediction model; comparing the dynamic deformation modulus of the tamping point with a set dynamic deformation modulus design value, and based on the comparison result, sending a prompt to stop tamping or a prompt to continue tamping. The control method provided by the present invention performs quality control on the dynamic compaction construction based on the acceleration signal and dynamic deformation modulus prediction model obtained in real time, so as to ensure uniform compaction of the roadbed and improve construction efficiency and quality.

The invention relates to the technical field of mechanical property detection of civil engineering materials, and discloses a dynamic deformation modulus tester, which comprises a mechanical supporting component, the active vibration isolation component is used for inhibiting external vibration interference; the load generating component comprises a guide rod, the bottom end of the guide rod is fixed with the damping piece, and the top end of the guide rod is fixed on the mechanical supporting component; the impact hammer sleeves the outer side of the guide rod in a sliding manner; the automatic lifting mechanism comprises a flexible connecting piece, a pulling assembly and a rotary driving assembly. According to the automatic lifting mechanism, the swing arm is driven to swing through the rotary driving assembly, and the full-process automatic action of lifting and releasing of the impact hammer is achieved by combining the synergistic effect of the pulling assembly and the flexible connecting piece. According to the automatic lifting mechanism, the swing arm is controlled to move through the rotary driving assembly, the flexible connecting piece is accurately pulled to complete lifting of the impact hammer, the unlocking part is triggered at the preset height to release the impact hammer, and the problems that manual operation is low in efficiency and large in labor intensity are thoroughly solved.

The application discloses a kind of earth-rock filling body compaction degree nondestructive testing method, collect the multi-source original feature data of earth-rock filling body, obtain dynamic deformation modulus, and establish dry density benchmark prediction model based on calibration test;Collect the original feature vector including dynamic deformation modulus, material characteristic parameter, construction state parameter and equipment impact parameter, and corresponding measured dry density;Establish benchmark relationship function, calculate target correction term;The original feature is standardized, and the standardized feature vector is obtained;Depth neural network model is constructed, second stage random forest model training, based on the parameter set and standardization feature, respectively calculate physical correction term and compensation term, sum to obtain comprehensive correction term;Final compaction degree prediction value.The application effectively solves the problems of backwardness of conventional earth-rock filling body density value detection means, damage to filling surface and low efficiency, and the obtained earth-rock filling body density value test meets the requirements of detection accuracy and construction progress.

The invention discloses a gravel pile construction whole process quality detection method, system and equipment and a medium. The whole construction process quality detection method of the gravel pile comprises the steps that detection points are selected before construction, soil body strength, deformation index parameters and wave velocity between the detection points are obtained, and bearing capacity and deformation modulus are obtained according to the selected detection surfaces; in the construction process, vibration information of the vibroflot is obtained, the compactness of the gravel pile is determined, and the wave velocity in the construction range is obtained according to vibration signals; after construction is completed, pile bodies and inter-pile soil detection points are selected according to the construction range and the number of the gravel piles, the strength and deformation index parameters of the pile bodies and the inter-pile soil detection points and the wave velocities between the different detection points are obtained, and the bearing capacity and the deformation modulus are obtained according to the selected detection face; and evaluating the quality of the whole construction process of the gravel pile according to measurement results before construction, in the construction process and after construction. By the adoption of the method, quality detection can be conducted on the whole gravel pile construction process from multiple dimensions, and therefore reliable guarantee is provided for construction quality.

The present invention provides a method and system for determining the failure mode and anchoring length of a steeply inclined thin-layer slope. A drilling experiment is carried out in the area where the slope to be supported has been partially excavated to obtain the measured value L of the rock mass relaxation depth M , the average longitudinal wave velocity C of the rock mass within the relaxation range p1 , the average longitudinal wave velocity C of the rock mass outside the range p0 and the bedding thickness δ of the thin-layer rock mass of the slope; a jointed model covering the slope to be supported is established; based on the material constant R, the average longitudinal wave velocity C of the rock mass within the relaxation range p1 , the average longitudinal wave velocity C of the rock mass outside the range p0 and the bedding thickness δ of the thin-layer rock mass of the slope, a damage coefficient D is constructed, and the threshold range of the damage coefficient D is confirmed: based on the measured value L of the rock mass relaxation depth M and the damage coefficient D, the deformation modulus E0, the bedding cohesion c L0 and the bedding internal friction angle φ L0 of the jointed model covering the slope are corrected; the corrected jointed model covering the slope is used to calculate the relaxation depth to determine the failure mode and anchoring length of different anchoring points.

The invention discloses a Duncan-Chang model parameter correction method for a soil body under a complex stress condition, and belongs to the technical field of water conservancy and hydropower engineering informatization system construction.The Duncan-Chang model parameter correction method comprises the steps that S1, according to different strength criteria, cohesive force expressions under different stress states are obtained; and S2, based on an incremental generalized Hooke's law, considering deformation generated by the effect of small principal stress difference in large principal strain superposition of the Duncan-Tensile model under the influence of medium principal stress, introducing stress state parameters, and correcting deformation modulus parameters. A natural loess consolidation drainage shear test is carried out under the true triaxial condition, the strength and deformation characteristics of a loess body in a complex stress state are revealed, the influence rule of principal stress on strength parameters is discussed from the strength parameter internal friction angle of a material under the true triaxial stress, and the stability of the loess consolidation drainage shear test is improved. The problem that the predicted tangent deformation modulus error is large due to the fact that an existing Duncan-Chang model does not consider the influence of the principal stress is solved, and the accuracy of the predicted tangent deformation modulus is improved.

The invention relates to an in-situ rock mass deformation modulus calculation method, which comprises the following steps: based on a data set containing a rock name, an elastic longitudinal wave speed and a deformation modulus, in combination with a relationship between a dynamic elastic modulus and density, a Poisson's ratio and the longitudinal wave speed, through an interval number operation rule, obtaining a relationship between a rock mass dynamic / static modulus ratio and the deformation modulus; calculating the theoretical relationship between the longitudinal wave velocity and the dynamic elastic modulus, density and Poisson's ratio of the complete rock mass and the jointed rock mass, and calculating the normalized damage degree of the in-situ rock mass through a binary function operation rule according to the principle that the ratio of the dynamic elastic modulus to the static elastic modulus between the complete rock mass and the jointed rock mass is equal; and calculating the P-wave modulus of the complete rock mass, and correcting the P-wave modulus to obtain the deformation modulus of the in-situ rock mass. The method is based on theoretical derivation instead of a specific engineering data set, so that the method can be suitable for different types of rock masses; and the secondary influence of density and Poisson's ratio is considered at the same time, so that the damage degree quantification is more accurate.

The application discloses a kind of deep cutting rock high slope unloading damage dynamic evaluation methods, determine the excavation range of deep cutting rock high slope, determine the physical and mechanical parameters of deep cutting rock high slope, test the wave velocity value and deformation modulus at different positions of high slope, determine the reference wave velocity value when deep cutting rock high slope does not occur damage, the reference deformation modulus when deep cutting rock high slope does not occur damage;Establish the coupling of acoustic wave test test and borehole elastic modulus test of deep cutting rock high slope unloading area range determination model;Determine the range of deep cutting rock high slope unloading damage area;Calculate unloading damage comprehensive evaluation coefficient value;According to the unloading damage comprehensive evaluation coefficient value of each coordinate point calculated, evaluation is carried out.The application can break through the single evaluation of deep cutting rock high slope unloading damage in the past, add unloading damage factors caused by engineering disturbance, rock mass deterioration, environmental evolution, and the evaluation system will be more comprehensive, quantitative evaluation of multi-factor coupling can be realized.

The invention relates to a method for calculating foundation settlement, which comprises the following steps of: partitioning a base plane of a building or a structure and the like into blocks, giving an additional pressure coefficient of each block area, and obtaining a geological section of a settlement part to be calculated and physical and mechanical parameters of soil; the method comprises the following steps: dividing foundation soil into a plurality of thin layers, calculating self-weight stress and additional vertical stress of each thin layer, determining an initial small strain modulus under a corresponding stress level, and determining initial rigidity of a spring for simulating a transverse constraint effect of a soil body; the initial deformation modulus and the spring stiffness are reduced according to the shear strain in the small strain stage, the tangent modulus and the vertical strain of each thin layer are calculated according to the shear stress level in the large strain stage, and then the compression amount of each thin layer is calculated and accumulated to obtain a foundation settlement value. According to the method, by considering the horizontal elastic-plastic constraint of the surrounding soil body on the soil body of the to-be-calculated settlement part, the problems that the lateral confinement compression modulus adopted by an existing method does not conform to the actual stress condition of the foundation, and settlement of saturated soil under the undrained condition cannot be calculated are solved.

The invention provides a calibrating device based on a dynamic deformation modulus tester, and relates to the technology of detection equipment. According to the device, one end of an adjusting support is connected with a fixed carrier, the other end of the adjusting support is provided with a dynamic deformation modulus tester, the dynamic deformation modulus tester is vertically arranged along the end face of a detected structure, the dynamic deformation modulus tester comprises a guide rod, a drop hammer and a damper, the drop hammer is connected to the guide rod in a sleeving mode, and the damper is arranged on the guide rod. The top of the guide rod is connected with the adjusting support, the bottom of the guide rod is connected with the damper, and the force value sensor is arranged at the bottom of the damper. One end of the displacement detection structure is connected with the fixed carrier, the other end of the displacement detection structure is provided with a plurality of displacement sensors, and the plurality of displacement sensors extend towards the dynamic deformation modulus tester to form detection ends. The device solves the problems that the impact time cannot be measured, the settlement value cannot be measured, and the measurement precision of the impact force is not high.

The utility model discloses a kind of dynamic deformation modulus testers, including drop hammer, guide rod and damping part, guide rod is vertically arranged, drop hammer is slidably connected on guide rod, damping part is fixedly connected at the bottom end of guide rod. Load plate, detachably connected at the bottom end of damping part. Bracket, bracket includes vertically arranged first support plate and second support plate, first support plate and second support plate top end between fixedly connected with crosspiece, crosspiece is detachably connected with the top end of guide rod. Automatic locking release assembly, fixedly connected on the inner wall of first support plate, for automatically locking and releasing drop hammer. Lifting assembly, for automatically lifting drop hammer. Controller, fixedly connected on the outer wall of first support plate, automatic locking release assembly and lifting assembly are electrically connected with controller. The utility model can automatically lift hammer and release drop hammer, reduce the working intensity of staff, eliminate manual operation error, improve the accuracy of test result.

The present invention provides a method and device for measuring the deformation modulus of soft clay, belonging to the field of geotechnical engineering measurement technology. The method comprises: obtaining the initial shear modulus and deformation modulus of the soft clay at each test point in a first state; based on the initial shear modulus of each test point, obtaining the elastic modulus of each test point using a conversion formula between the shear modulus and the elastic modulus; performing data fitting on the deformation modulus and the elastic modulus of each test point to obtain a first fitting relationship between the deformation modulus and the elastic modulus in the first state; and determining a measurement formula for obtaining the deformation modulus using the initial shear modulus using the conversion formula and the first fitting relationship. The present invention establishes a measurement formula for obtaining the deformation modulus from the initial shear modulus of soft clay by conducting a load test and a self-drilling lateral pressure test, providing a measurement method for obtaining the deformation modulus using a self-drilling lateral pressure test, which can improve the efficiency and accuracy of obtaining the deformation modulus.

The invention provides a roadbed compaction vibration parameter calculation method and device based on an indoor compaction test, and relates to the technical field of roadbed rolling, and the method comprises the steps: obtaining a filler used in a roadbed site, and carrying out an indoor compaction test by using the filler to determine the optimal compaction work corresponding to the filler with a preset water content; calculating strong vibration compaction energy and weak vibration compaction energy output by the vibratory roller according to the preset loose laying thickness of the filler and the preset compaction speed of the vibratory roller; the maximum strong vibration compaction times and the maximum weak vibration compaction times required by the optimal compaction work are calculated respectively, a plurality of strong and weak vibration working condition combinations are planned, the dynamic deformation modulus of each strong and weak vibration working condition combination is calculated in sequence, and the optimal strong and weak vibration working condition combination closest to the target dynamic deformation modulus is obtained. According to the method, the compaction work, the water content and the input energy of the vibratory roller are combined, so that accurate pre-planning of the vibration parameters is realized, the construction process is optimized, and the compaction efficiency is improved.

The application provides a method for quantitatively obtaining mechanical parameters of surrounding rock in a thermal-hydraulic environment, and relates to the technical field of rock mechanics. The method comprises the following steps: obtaining complete rock material constants, disturbance factors and geological strength index values of target surrounding rock at a target surrounding rock temperature; determining rock mass material constants of the target surrounding rock; determining rock mass tensile strength, compressive strength, cohesion, internal friction angle and rock mass deformation modulus in the thermal-hydraulic environment based on the rock mass material constants of the target surrounding rock. The application proposes a modified estimation formula suitable for the thermal-hydraulic environment based on the Hoek-Brown surrounding rock mechanical parameter estimation method; numerical simulation results show that the displacement error is less than 10%, which verifies the effectiveness of the modified surrounding rock mechanical parameter estimation formula and has engineering application value.

The invention belongs to the field of deep rock mass mechanical parameter measurement, and particularly relates to a deep rock mass deformation modulus in-situ measurement system and a calculation method. The method comprises the steps that a representative rock mass area is selected, and obvious cracks or fracture zones are avoided; cleaning a test area, and installing a bearing plate, a loading system and a measuring system in sequence; grading loading and grading unloading are carried out; and drawing a load-settlement curve, and obtaining the in-situ deformation modulus of the deep rock mass according to a calculation method. According to the technical scheme, in the geotechnical engineering investigation and design links, the deformation parameters of the deep rock mass under the in-situ condition can be directly obtained, and a key basis is provided for engineering foundation design. And in the face of complex geological conditions, by adjusting test parameters and methods and deeply analyzing test data, the stability and deformation conditions of the foundation under different stratum conditions can be accurately evaluated, and the safety and economical efficiency of engineering can be guaranteed to a greater extent.

The invention relates to a railway roadbed engineering dynamic deformation modulus test device and method, and belongs to the technical field of roadbed quality detection.The railway roadbed engineering dynamic deformation modulus test device comprises a base, a vibration measurement sensor, a damping device, a drop hammer, a guide rod, a hook device and a subsidence tester; the vibration measurement sensor, the damping device, the drop hammer, the guide rod and the hook device are all arranged on the guide rod from bottom to top, the subsidence tester is in communication connection with the vibration measurement sensor, and the driving device is used for driving the drop hammer to impact the damping device to rebound when the drop hammer impacts the damping device. And the drop hammer is driven to move along the vertical direction of the guide rod and towards the hook device. The method has the effect of improving the dynamic deformation modulus test efficiency.

The present invention relates to the technical field of mechanical property testing of civil engineering materials, and discloses a dynamic deformation modulus tester, comprising: a mechanical support component; an active vibration isolation component for suppressing external vibration interference; a load generating component, which comprises: a guide rod, the bottom end of which is fixed to a damping component, and the top end is fixed to the mechanical support component; an impact hammer, which is slidably sleeved on the outside of the guide rod; and an automatic lifting mechanism, comprising: a flexible connector, a pulling assembly, and a rotary drive assembly. The automatic lifting mechanism of the present invention drives the swing arm to swing through the rotary drive assembly, and combines the pulling assembly with the flexible connector to achieve a full-process automated action of lifting and releasing the impact hammer. The automatic lifting mechanism controls the movement of the swing arm through the rotary drive assembly, accurately pulls the flexible connector to complete the lifting of the impact hammer, and triggers the unlocking part at a preset height to release the impact hammer, completely solving the problems of low efficiency and high labor intensity of manual operation.