Electroosmotic treatment method of expansive soil

Abstract

The invention discloses an electro-osmosis treatment method for expansive soil. The electro-osmosis treatment method includes steps of driving a plurality of electro-osmosis electrodes into the expansive soil to form an electrode array comprising a plurality of rows of electro-osmosis electrodes; respectively connecting each two adjacent rows of electro-osmosis electrodes in the electrode array to an anode and a cathode of a power source; burying two metal wires in the expansive soil, enabling one metal wire to be close to an electro-osmosis electrode connected with the anode, and enabling the other metal wire to be close to an electro-osmosis electrode connected with the cathode; respectively connecting the two metal wires to the cathode of the power source by voltage measuring meters; performing electro-osmosis treatment on the expansive soil, particularly, turning on the power source, recording a numerical value acquired by the voltage measuring meter connected with the metal wire which is close to the electro-osmosis electrode connected with the anode, turning off the power source when a certain period of time elapses and then a numerical value acquired by the voltage measuring meter drops and is 40-60% of an initial voltage, and changing the anode and the cathode connected with the electro-osmosis electrodes in the electrode array; repeatedly carrying out electro-osmosis treatment steps.

Description

technical field [0001] The invention relates to a method for electroosmosis treatment expansion. Background technique [0002] Expansive soil is a kind of soil with special engineering geological characteristics. Its severe dehydration shrinkage and water absorption expansion characteristics often cause geotechnical engineering disasters, such as cracking of house walls, landslides, slides of subway lines, etc. There are a large number of expansive soil slopes (foundations) in the sections of my country's South-to-North Water Diversion Project passing through Henan, Hubei and other places, especially in Nanyang, Handan, Xinxiang and other places, where the free expansion rate of expansive soil can even be as high as 150%. [0003] There are two main expansion mechanisms of expansive soil, which can be explained by lattice expansion theory and diffusion electric double layer theory respectively. The theory of lattice expansion points out that clay minerals, especially montmo...

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Problems solved by technology

[0005] However, most of the research on the above-mentioned methods is to take soil from expansive soil on-site and carry out admixture tests in the laboratory. There is no large-scale treatment of expansive soil on-site, and its on-site construction methods and processes need further research.

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