Rock and soil medium micron indentation testing method and system

Abstract

The invention discloses a rock and soil medium micron indentation testing method and system. The method comprises the following steps: a soil block sample is placed on an electronic balance; the actuator is controlled by the PC end to generate vertical displacement, so that the telescopic end of the actuator drives the measuring head of the digital display dial indicator to move close to or far away from the electronic balance, wherein when the telescopic end of the actuator continuously extends, the digital display dial indicator is driven to generate synchronous displacement, so that the measuring head gradually penetrates into the soil block sample; when the actuator stops extending, the measuring head penetrating into the soil block sample is kept static; when the telescopic end of the actuator contracts, the digital display dial indicator is driven to generate synchronous displacement, so that the measuring head gradually gets away from the soil block sample; and the instrument panel is used for displaying the change data of the pressure borne by the actuator when the actuator drives the measuring head of the digital dial indicator to extend, rest and contract. The method and system can be widely applied to the technical field of geotechnical engineering testing.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering detection, and in particular relates to a method and system for micron indentation testing of rock and soil media. Background technique [0002] At present, with the development of infrastructure construction, people pay more and more attention to the structural behavior of rock and soil materials. Arrangement, accumulation, cementation. At the macro scale, due to the traditional geotechnical test technology, the use of traditional indoor geotechnical experiments (triaxial, direct shear, etc.) methods and outdoor field tests (CPT, cross plate shear, side pressure, etc.) Precise and effective non-destructive detection of soil fabric. At the microscopic scale, nanoindentation technology realizes the characterization of the microscopic mechanical properties of materials, and can obtain the material properties of the microscopic components of rock and soil materials, but because the...

AI Technical Summary

Problems solved by technology

At the macro scale, due to the traditional geotechnical test technology, the use of traditional indoor geotechnical experiments (triaxial, direct shear, etc.) methods and outdoor field tests (CPT, cross plate shear, side pressure, etc.) Precise and effective non-destructive detection of soil fabric

At the microscopic scale, nanoindentation technology has realized the characterization of the microscopic mechanical properties of materials, and can obtain the material properties of the microscopic components of rock and soil materials, but because the scale is too small, it cannot fully reflect the mechanical characteristics of the material unit

[0003] It can be seen that there is still a lack of effective technical means in this field for testing the mechanical properties of rock and soil materials at the meso-mesoscopic (particle) scale;

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