Microstructure evolution method based on soil dynamic parameters and anisotropy measuring instrument under k0 condition

Abstract

The invention provides a microstructure evolution method based on a soil dynamic parameter and anisotropy measuring instrument under K0 conditions. The soil dynamic parameter and anisotropy measuring instrument includes a loading device and a model box for providing loads. The model box is composed of a cavity for storing the soil to be tested and an openable cavity cover. The loading device is connected with the cavity cover of the model box. A piezoelectric sensor for measuring soil shear modulus and compressive modulus, the horizontal and vertical directions of the model box are also provided with pressure film sensors for detecting the horizontal earth pressure and vertical earth pressure of the soil to be measured, the A buffer pad is provided at the installation place of the piezoelectric sensor and the model box, and a strain detection device for detecting the variation of the soil stress to be measured is also provided on the chamber cover. The present invention improves the accuracy of the soil measurement modulus and the accuracy of the K0 state. Mechanical response, easy operation and high reliability.

Description

technical field [0001] The invention relates to a device and method for the evolution of basic mechanical parameters and microstructure of soil, in particular to a K 0 Microstructure evolution method based on soil dynamic parameters and anisotropy tester under certain conditions. Background technique [0002] The maximum dynamic shear modulus and dynamic compression modulus of sandy soil are the two most basic parameters of soil dynamics, and are very important basic parameters in the calculation and design of geotechnical engineering, and different soil particles under different loads The environment is also undergoing the evolution of microstructure, and this series of processes must be quantitatively analyzed in the laboratory before the design and construction of infrastructure, which provides a strong foundation for the improvement of safety and durability in the construction and operation of future projects. strong guarantee. At present, in domestic geotechnical engi...

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Problems solved by technology

At present, in domestic geotechnical engineering laboratory experiments, the maximum dynamic shear modulus is usually obtained by the resonance column experiment. Due to the limitation of the resonance column itself, first of all, it cannot really obtain the maximum dynamic shear modulus and dynamic compression modulus. It has been proved by experiments; secondly, it cannot guarantee that the experimental samples are under the K0 condition, so it cannot truly reflect the stress state of the soil under realistic conditions; finally, because the resonant column experiment process is very cumbersome, and requires the operation of very experienced experimenters to obtain reliable data

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