19 results about "Deformation modulus" patented technology

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 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 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 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 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 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 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 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.

The application relates to the technical field of tunnel construction, and particularly discloses a tunnel excavation deformation prediction method based on numerical simulation and parameter inversion, which comprises the following steps: (1) collecting deformation modulus and Poisson's ratio as parameters to be studied; (2) establishing a two-dimensional finite element model through abapus; (3) setting multiple test groups for the parameters to be studied, obtaining a functional relationship between vault displacement and deformation modulus and Poisson's ratio and a functional relationship between peripheral displacement and deformation modulus and Poisson's ratio under a first excavation condition; (4) substituting monitored values of vault and peripheral displacement under the first excavation condition into the functional relationship to obtain inversion values E1 and v1 of the deformation modulus and Poisson's ratio under the first excavation condition, and substituting E1 and v1 into the two-dimensional finite element model to obtain predicted values S of the vault and peripheral displacement under the first excavation condition. 拱顶2 and S 周边2 The tunnel excavation deformation prediction method based on numerical simulation and parameter inversion can improve the accuracy of tunnel excavation deformation prediction.

The invention provides a rock mass deformation modulus accurate prediction method, system and device based on adaptive Kalman filtering and a medium. The method comprises the following steps: according to dam foundation engineering rock mass rigid bearing plate in-situ experiment data and sound wave test experiment data, calculating a rock mass deformation modulus of a dam foundation; and taking the acoustic wave velocity and the deformation modulus of the rock mass as state variables required by adaptive Kalman filtering. And performing real-time estimation on the dynamic noise variance matrix according to the existing information, and comprehensively adjusting the noise matrix to obtain a system filtering value so as to predict and evaluate the system state. The method is implemented on the basis of an adaptive Kalman filtering algorithm by referring to a wave velocity-deformation modulus prediction formula of engineering experience. According to the method, the prediction model is corrected according to the adaptive method, data divergence of the system in the filtering process can be effectively reduced, model errors are reduced, and prediction evaluation precision is improved.

The invention discloses a foundation settlement deformation calculation method based on a load test P-s curve, and relates to the field of foundation settlement deformation calculation, and the method comprises the following steps: S1, obtaining foundation settlement deformation test data points through the load test P-s curve; s2, converting foundation settlement deformation test data points into points in a semi-logarithmic coordinate system, fitting the points in the semi-logarithmic coordinate system to obtain parameters, and drawing a Pr-sr curve; s3, calculating an inflection point coordinate of the Pr-sr curve, and calculating a foundation deformation modulus and a foundation compression modulus; and S4, calculating the settlement deformation of the foundation according to the compression modulus of the foundation. According to the method, the more real, more accurate and more reliable foundation compression modulus can be obtained based on the static load test, and the accuracy of a foundation settlement deformation calculation result is greatly improved, so that the safety risk of foundation engineering is effectively controlled.