Triaxial test apparatus of soil under water-soil chemical action and method thereof

Abstract

The invention discloses a triaxial test apparatus of soil under water-soil chemical action and a method thereof, and relates to a testing technique of soil under a special environment. The device comprises a device frame (10), a triaxial pressure chamber (20), a confining pressure exerting and deformation test device (30), a solution cyclic displacement device (40), a stress/strain control loading device (50), a displacement sensor (60) and a data collecting and processing device (70). The uniformity of ingredients and concentration of internal pore water solution of a specimen is ensured by solution circulation; the change rules of soil deformation and strength caused by chemical solution transfusion under constant stress can be simulated and researched; the confining pressure exerting principle is improved; accurate measurement of body deformation is achieved; and the conversion of strain control and stress control can be achieved.

Description

technical field [0001] The invention relates to the test technology of soil under special environment, in particular to the triaxial test device and method of soil under the chemical action of water and soil. [0002] Specifically, the present invention relates to the testing of deformation characteristics and strength of soil under the chemical action of chemical solutions such as acids, alkalis, and salts with different concentrations, and relates to the deformation of soil caused by the change of seawater salinity concentration caused by the decomposition of hydrate in the seabed hydrate mining process. Research on soil deformation characteristics and strength attenuation laws under special circumstances such as deformation, soil pollution, increase of ion concentration, and soil drought / flood cycle in extreme climates leading to ion concentration cycle. Background technique [0003] Modern society is facing many problems such as energy shortage and environmental pollutio...

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Problems solved by technology

[0004] At present, the research on the deformation and strength characteristics of soil under the influence of water-soil physical and chemical interaction is still in its infancy. Many tests are carried out on the original equipment with different concentrations of chemical solution saturated samples. This method is difficult to simulate. Study the deformation characteristics and strength evolution of soil during the seepage and diffusion of chemical solutions

After searching, there is no relatively mature test device and method that can effectively simulate the mechanical properties of soil under the influence of water-soil chemical interaction.

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