Device and method for testing mechanical property of soil which is improved through electrochemistry under action of dry-wet cycle

Abstract

The invention discloses a device and a method for testing the mechanical property of the soil which is improved through electrochemistry under the action of dry-wet cycle, which are applied to electrolytically treating viscous soil and testing the mechanical property thereof. The soil is electrolyzed by arranging electrodes at the upper end and the lower end of the shearing box, and the cation replacement inside the soil is achieved, therefore, the water absorption property of the soil is improved, the specific gravity of the combined water and the free water is changed, and the basis is provided for researching the change rule of the water absorption property of the soil on the mechanical property of the soil under the dry-wet cycle. By designing the steam humidification tube inside the shearing box to carry out humidity control, the soil sample is simulated under the dry-wet cycle, and the moisture content probe is arranged in the soil, so that the moisture content change of the soilin the dry-wet cycle can be tested. Through the design of the annular shearing box, the cyclic shearing can be achieved, and the problem of soil missing in the cyclic shearing is avoided, therefore,the test on the shear strength and the mechanical property, and the change rule of the soil under the condition of dry-wet cycle is achieved. The device is ingenious in structural design, convenient to implement, and high in practical value and popularization value.

Description

technical field [0001] The invention relates to the technical field of soil engineering, in particular to a device and method for testing the mechanical properties of electrochemically improved soil under the action of dry-wet cycle. mechanical properties under the condition. Background technique [0002] The dry-wet cycle will have a significant impact on the physical and mechanical properties of some unsaturated cohesive soils, such as expansive soil and loess. In engineering practice, it is often necessary to study the change law of soil mechanical properties and structural properties of such soils under dry-wet cycles, and the research results are particularly important for analyzing and improving the engineering properties of cohesive soils. [0003] However, in the prior art: [0004] (1) The improvement methods for the physical and mechanical properties of the soil mainly include adding geosynthetics to the soil and adding a curing agent to the soil. The main princi...

AI Technical Summary

Problems solved by technology

However, direct addition of cationic curing agent cannot effectively replace the original cations in the soil;

[0005] (2) In the shear strength test of soil, the main methods are direct shear test and triaxial shear test. Neither of these two test methods can directly test the shear strength of soil under the action of dry-wet cycles. The specific environment of dry-wet cycle is used to simulate and study the changes of soil internal mechanical properties and structural properties;

[0006] (3) For the test device for simulating the dry-wet cycle of the soil, the constant water head soaking method is used to replenish water for the sample, which cannot quantitatively control the soil humidity, resulting in a single and inaccurate simulation state, which does not conform to the dry-wet cycle in the natural state The actual law of change

Images