Soil body electrical parameter space-time distribution testing device and method for triaxial experiment

Abstract

The invention provides a soil body electrical parameter space-time distribution testing device and testing method for a triaxial experiment. The testing device comprises a triaxial compression experiment device, an insulating rubber film, conducting strips and an electrodes. The insulating rubber film, the conducting strips and the electrodes are added into a confining pressure chamber in the triaxial compression experiment device; the insulating rubber film is used as a soil sample to be isolated from the confining pressure chamber in the triaxial compression experiment device; the conductingstrips and the electrodes are used for testing electrical parameters of the soil body; the conducting strips are arranged at the end parts of the two ends of a soil sample of the triaxial compressionexperiment; the electrodes are inserted into the soil body through the small holes of the insulating rubber film and are uniformly arranged along the circumferential direction of the insulating rubber film to form a group of conductive electrodes; and a plurality of groups of electrodes are arranged along the axial direction of the insulating rubber film to test the resistivity of each layer of soil body. The soil body electrical parameter space-time distribution testing device and testing method are applied to subgrade engineering of different soil bodies, soft soil and silt foundation engineering, various soil body landslides and other engineering, the soil body performance and damage state are evaluated, and the relation between damage and strength is established.

Description

technical field [0001] The present invention relates to the field of civil engineering, in particular to a device and method for testing the time-space distribution of soil electrical parameters in a triaxial experiment; Test the system and how it works. Background technique [0002] During the failure process of engineering soil, the decrease of soil strength is closely related to the damage of internal structure, but in the laboratory test, it is relatively difficult to obtain relevant structural information inside the soil while realizing the measurement of strength. For triaxial experiments, the soil sample will deform under the action of dynamic load or static load, and the strength parameters will continue to change until it is destroyed. In this process, the external deformation characteristics of the soil sample can only be observed directly, or the high-speed camera and other technologies can be used to achieve Quantitative measurement of the surface deformation of...

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Problems solved by technology

[0002] During the destruction process of engineering soil, the decrease of soil strength is closely related to the damage of internal structure, but in the laboratory test, it is relatively difficult to obtain relevant structural information inside the soil while realizing the measurement of strength

For triaxial experiments, the soil sample will deform under the action of dynamic load or static load, and the strength parameters will continue to change until it is destroyed. In this process, the external deformation characteristics of the soil sample can only be observed directly, or the high-speed camera and other technologies can be used to achieve Quantitative measurement of the surface deformation of soil samples, but neither can quantitatively describe the deformation characteristics inside the soil, nor can it establish the internal relationship between internal structural damage and the measured strength parameters

Existing methods for testing physical and mechanical parameters of soil mainly through drilling and sampling indoor experiments, which have disadvantages such as low efficiency

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