9 results about "Deformation modulus" patented technology

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 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 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 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 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 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.