Device and method for electroosmosis consolidation of high-water-content soft soil in mixed power-on mode

Abstract

The invention discloses a device and a method for electroosmosis consolidation of high-water-content soft soil in a mixed power-on mode, and belongs to the technical field of electroosmosis drainage consolidation. The device comprises a soil sample chamber and a water collection chamber, a partition plate is arranged between the soil sample chamber and the water collection chamber, a plurality of holes are formed in the partition plate, a cathode plate and an anode plate are arranged in the soil sample chamber, and a power supply and a data acquisition device are connected between the cathode plate and the anode plate. The data acquisition device comprises a current acquisition module and a potential acquisition module, the data acquisition device is in data connection with an upper computer, the water collection chamber is connected with a water collection bucket, a camera device is arranged on one side of the water collection bucket, and the camera device is in data connection with the upper computer. Different power output modes are used in a mixed mode, the electroosmosis speed can be increased in a constant voltage-constant current mixed input mode, and the shear strength of a soil body is improved; and in a constant current-constant voltage mixed input mode, heat generated in the later period of electroosmosis consolidation can be reduced, and the energy consumption of electroosmosis consolidation is reduced.

Description

technical field [0001] The invention relates to a device and method for electroosmotic consolidation of soft soil with high water content under a mixed power supply mode, and belongs to the technical field of electroosmotic drainage consolidation. Background technique [0002] In recent years, with the development of economy and technology, a large number of land reclamation projects have been carried out in the coastal and lakeside areas of our country. The land formed by dredging needs to be reinforced due to its high water content and low strength. Traditional foundation reinforcement methods include surcharge preloading, vacuum preloading, etc. Heap load preloading is to apply preloading load to the foundation before building the building, so that the soil body can complete part of the foundation settlement in advance, and through the preloading load, the soil particles can be aggregated, the pore pressure can be reduced, the effective stress of the soil body can be inc...

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Problems solved by technology

The advantage of intermittent energization is that using an appropriate energization cycle and on-off time ratio can slow down electrode corrosion and improve the electroosmosis effect, but the disadvantage of intermittent energization is that it will prolong the electroosmosis time and reduce the electroosmosis efficiency; the advantage of electrode reversal is that It can make the soil consolidation and deformation more uniform, but the average shear strength is worse than conventional electroosmosis, and the shorter the reversal period, the worse the effect; a reasonable step-by-step loading voltage scheme can reduce power consumption, increase electroosmosis drainage and The efficiency of electroosmosis in the later stage increases the shear strength of the soil near the cathode and makes the soil more uniformly reinforced, but multiple loading schemes make it difficult to implement

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