Method and device for accelerating ultra-soft soil solidification through dual-passage variable-polarity vacuum electroosmosis

The invention relates to a method and a device for accelerating ultra-soft soil solidification through dual-passage variable-polarity vacuum electroosmosis. The method comprises the following steps: 1) laying a geotextile; 2) inserting composite drainage plates in rows; 3) laying a dual-passage closed vacuum drainage PVC (Polyvinyl Chloride) main pipe and branch pipes; 4) connecting the composite drainage plates with the branch pipes by using closed quick plate and pipe connectors which can be connected with conducting wires; 5) serially connecting the composite drainage plates by using electroosmosis conducting wires to form an electroosmosis electrode array and laying a vacuum membrane; 6) starting a vacuum electroosmosis combined working mode and dynamically controlling polarity variation of a vacuum drainage main valve and composite drainage plates according to parameters such as water output. The device comprises the composite drainage plates, dual-passage vacuum pre-pressing drainage main and branch pipes and an electroosmosis variable-polarity system. The method and the device for accelerating ultra-soft soil solidification through dual-passage variable-polarity vacuum electroosmosis have the remarkable advantages that the effective superposition for facilitating water migration through the production of a vacuum pressure field and an electric field is realized, the loss of a single anode is reduced, the energy consumption per unit time is reduced, the drainage and solidification efficiency is improved by 2-5 times, the construction is simple and convenient to perform, the load time is short and the cost is saved.