A kind of black cotton soil electroosmosis test device and test method

Abstract

The invention discloses a black cotton soil electroosmosis test device and a test method. The test device includes a soil holding box, an anode box, a cathode box and a power supply; the test method includes: (a) mixing black cotton soil with ingredients and stewing materials After calculating the required soil samples, compress the soil samples to the set height; (b) inject the electroosmotic liquid and water into the anode box and the cathode box respectively, keeping the liquid level flush with the top surface of the soil sample; (c) put the anode box into The first graphite electrode, the cathode box is put into the second graphite electrode, and the power is turned on for electroosmosis; (d) the power is turned off, and the soil sample is compressed to the set height; (e) water is injected into the anode box and the cathode box, and the liquid level and the soil sample are Keep the top surface flush, and record the dial gauge readings at intervals until the soil sample no longer expands; (f) Compress the soil sample to the set height to obtain the expansion force. The device of the invention can effectively obtain black cotton soil treated by electroosmosis of cation solutions of different concentrations, and evaluate the effect of electroosmosis treatment in combination with expansion rate and expansion force; the operation is simple and easy to realize.

Description

technical field [0001] The invention relates to the field of black cotton soil treatment methods, in particular to a black cotton soil electroosmosis test device and a test method. Background technique [0002] Black cotton soil is composed of expansive clay minerals montmorillonite, illite, etc. It is a special kind of clay soil with expansion-shrinkage, over-consolidation, multiple fissures and strength attenuation characteristics. The volume of black cotton soil increases and expands, which can cause deformation and damage of roads or other buildings built on the soil foundation. If the soil is limited by external constraints when it absorbs water and expands, preventing it from expanding, an internal stress will be generated in the soil at this time, that is, expansion force or expansion pressure. Contrary to the expansion of the soil when it absorbs water, if the soil loses water, its volume decreases and shrinks, and the soil cracks. [0003] Since black cotton soil ...

AI Technical Summary

Problems solved by technology

However, there is still a lack of relevant test equipment and test methods for electroosmotic treatment of black cotton soil.

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