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

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of super-soft mud soil drainage consolidation foundation treatment, and more specifically relates to a dual-channel variable pole vacuum electroosmosis accelerated ultra-soft mud soil drainage consolidation foundation treatment method, and also relates to a dual-channel variable pole A device for vacuum electroosmosis to accelerate the drainage and consolidation of ultra-soft silt soil. This method and device are not only suitable for the reinforcement of various types of saturated soft clay foundations with high sensitivity, but also especially suitable for ultra-fine particles and extremely low initial bearing capacity. All kinds of dredged silt dredging and filling the deep and shallow layers of the foundation at the same time in the whole range. Background technique [0002] Ultra-soft silt soil is generally formed by dredging silt from harbor basins and waterways and filling it in the cofferdam by hyd...

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Problems solved by technology

①The loss of the anode is large, which leads to an increase in cost, and the "containment effect" of the cathode is obvious, which greatly affects the electroosmotic effect; ②It is only a simple combination of vacuum and electroosmosis, without considering the energy offset effect of the vacuum pressure field and the electric field, resulting in drainage efficiency Reduced, energy consumption per unit time increases

④The transmission efficiency of the vacuum degree is low. To deal with deep soft soil, secondary reinforcement treatment is required

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