Indoor vacuum electro-osmosis combined solidification tester

Abstract

The invention relates to an indoor vacuum electro-osmosis combined solidification tester. An anode iron wire is arranged around a main cylinder and is connected with electrode collars. The soil sample layer and the water storage layer of the main cylinder are communicated through a vertical drain pipe. The vertical drain pipe is covered by a layer of geotextile. A cathode iron wire is wound outside the geotextile. The cathode iron wire, the anode iron wire, an ampere meter and a power supply are serially connected to form a loop. Four rows of guide holes are centrosymmetrically arranged on a top plate at the upper part of the main cylinder. Hole pressure sensors, level sensors, surface settlement marks and layered settlement marks respectively penetrate through the four rows of guide holes. The sensors are connected with a computer through acquisition instruments. A water storage layer at the lower layer of the main cylinder is communicated with a gas-water separation device. The upper part of the gas-water separation device is communicated with a vacuum meter and a vacuum pump. The indoor vacuum electro-osmosis combined solidification tester can be used for conducting indoor exploration tests to different soil body samples through a vacuum electro-osmosis combined effect or a single effect, can monitor the real-time change situation of various parameters in soil samples in the process and can quantitatively analyze the solidification result.

Description

technical field [0001] The invention relates to a test device, in particular to an indoor vacuum electroosmosis combined consolidation tester, which can carry out indoor exploration tests of vacuum electroosmosis combined or single action on different soil bodies. Background technique [0002] In recent years, with the continuous development of my country's economic construction, there are more and more projects such as various coastal industrial parks, artificial islands (airports), and tourist attractions, such as the construction of Macau International Airport and Hong Kong International Airport. In cities, subway and high-speed rail technologies have also been rapidly developed and widely used. All these practical projects are faced with a major problem, that is, the handling of soft clay foundations. In addition, the treatment of tailings and sludge, which has attracted more and more attention in recent years, has also become a difficult problem. Soils such as soft cl...

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Problems solved by technology

[0006] However, at present, there are relatively few studies on the vacuum electroosmosis combined consolidation method, and the research on its internal mechanism of action and design issues in engineering practice is not thorough enough. In practical applications, most of the relevant parameters are determined by the experience of designers.

At present, the existing indoor vacuum electroosmosis test equipment cannot accurately reflect the stress and deformation of the soil in actual engineering, and cannot measure the development of ultra-static pore water pressure at different positions inside the soil, the development of surface settlement, and the different radial directions inside the soil layer. Monitoring the development of settlement at depth and the change of soil resistance, etc., which makes it impossible for researchers to accurately grasp the stress and deformation inside the soil sample during vacuum electroosmosis combined consolidation, and cannot accurately obtain relevant design calculation parameters

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