70 results about "Soil dynamics" patented technology

The invention relates to a soil sampler directly used for an undisturbed-sample dynamic characteristic test. The problems that an I-grade sand-soil undisturbed sample collected by an existing soil sampler is difficult during processing and preparing in a laboratory, and is prone to disturbing the undisturbed structure of a sand-soil sample are effectively solved. An outer upper cylinder and an outer lower cylinder are rotationally installed; sliding grooves are formed in the two sides of the outer lower cylinder, a spring in the lower portion of the outer upper cylinder is pressed at the top of an inner cylinder body in the outer lower cylinder, side lugs are arranged at the top of the inner cylinder body, flexible pipe holes are formed in the portions, below the side lugs, on the two sides of the inner cylinder body, and the inner cylinder body is rotationally installed on a waste soil pipe; the waste soil pipe is connected with a soil sampling pipe, and the soil sampling pipe is connected with the upper end of a pipe boot. The soil sampler is simple in structure and convenient to assemble and disassemble, and is one of ideal tools for collecting the I-grade sand-soil undisturbed sample for the soil dynamic characteristic test in drilling.

The invention provides a method for determining distributed explosive source triggering parameters. The method comprises the steps of (a) adopting a near-surface survey method to delimit a rock-soil layer horizon of a surface layer and determining basic physical parameters; (b) performing gun testing and triggering, and monitoring and recording ground vibration; (c) according to gun testing arrangement and rock-soil layering of the earth surface, establishing a finite element model of explosion action in rock-soil of the explosive source; (d) performing comparing regression analysis by finite element model calculation and test monitoring records, and determining rock-soil dynamic deformation model parameters; (e) performing analysis comparison on initial elastic wave energy and frequency in multiple distributed explosive source triggering schemes on the basis of the established on-site rock-soil layer model, combining exploration target layer characteristics and requirements, and determining that the distribution satisfying the energy and resolution is explosive source triggering parameters. The method for determining the distributed explosive source triggering parameters, provided by the invention, is rapid in speed, wide in application scope, low in cost, simple and convenient, and easy to implement.

The invention discloses an open trench vibration isolation design method based on quantitative analysis. The method includes the steps that 1, a finite element calculation model related to the foundation is established; 2, foundation soil dynamic material parameters and a dynamic load time travel curve are determined; 3, a dynamic finite element basic equation is established, vibration isolation trenches with different depths are set on the finite element calculation model, the finite element calculation model is analyzed, and the dynamic finite element basic equation is solved by utilizing the dynamic material parameters and dynamic load of foundation soil to obtain mass matrixes, damping matrixes, stiffness matrixes and nodal load vectors of all node units of the finite element calculation model; 4, transient analysis is conducted to acquire a post-trenching surface vertical velocity response value; 5, according to the post-trenching surface vertical velocity response value, a post-trenching vibration velocity maximum value and distance relation curve of the vibration isolation trenches with different depths is obtained by fitting, and the range of a velocity response enhancementzone and a building and vibration isolation trench distance corresponding to an expected vibration isolation effect of the vibration isolation trenches in later engineering construction of the reinforcement zone are obtained through the curve.

The invention relates to a roadbed soil dynamic rebound modulus predicting system and method. The system comprises a soil sampler, an electronic balance, a drying box, a volume-weight tester, a liquid-plastic limit combined tester, a triaxial experiment instrument and a computer. The liquid-plastic limit combined tester comprises a support, an electromagnet, a cone penetrator with a scaleplate, a sample cup, a control switch and a lifting base, wherein the electromagnet is installed in an upper frame of the support, the cone penetrator with the scaleplate is adsorbed to the portion below the electromagnet, the lifting base is installed in a lower frame of the support, the sample cup is located on the lifting base, and the control switch is located on the side face of the lower frame of the support. Compared with the prior art, the roadbed soil dynamic rebound modulus predicting system and method are based on a radial basis function neural network, selected input indexes have defined meanings, a predicting model is high in automation degree, and the roadbed soil dynamic rebound modulus predicting system has the advantages of being high in calculation speed and accuracy, and suitable for engineering realization.

The invention relates to a field operation machine for overcoming continuous cropping barrier soil.The field operation machine comprises a soil deep plowing, smashing and collecting device, a soil dynamic microwave disinfecting and sterilizing device and a soil ecological adjustment and fertilizer application device which are connected into a whole through a soil conveying belt.The soil deep plowing, smashing and collecting device and the soil ecological adjustment and fertilizer application device are fixed to the two ends of a metal housing of the soil dynamic microwave disinfecting and sterilizing device respectively.Hydraulic supporting wheels are arranged at the rear end of the metal housing and connected with tail wheel adjustment hydraulic cylinders.The tail wheel adjustment hydraulic cylinders are installed on the two sides of the rear end of the metal housing.The hydraulic supporting wheels are used for adjusting the height of the metal housing.The hydraulic supporting wheels adjust the height under the effect of the tail wheel adjustment hydraulic cylinders and play a supporting role in the working and transporting process.Two sets of bearing wheels are arranged on the lower portion of the metal housing.The multifunctional agriculture operation machine can complete soil deep loosening, sterilization and disinfection, soil nutrition and ecological improvements at a time, continuous cropping barriers are comprehensively overcome, no pollution or residues are caused, and the continuous cropping soil performance is efficiently improved.