EXPERIMENTAL STUDY ON CONSOLIDATION OF MARINE CLAYS IN ALTERNATING ELECTRIC CURRENT FIELD

概要

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From microscopic point of view, consolidation of clays takes place when the driving forces for pore water flow exceed the forces tending to hold the water to clay particles. To consolidate soft clays, theoretically two ways can be considered. One is to enhance the driving forces for pore water flow and the other is to reduce temporarily the forces tending to hold the water. While conventional methods for consolidation are based on the former way, this paper deals with the latter idea by making use of electro-chemical properties of clay soils. In order to reduce the forces tending to hold pore water, an electrical disturbance was imposed to clays by loading alternating electric current (AC). A series of consolidation tests of marine clays under AC field were carried out. It is found that the consolidation of clays can take place by the loading of AC whose magnitude is larger than a critical value. In AC consolidation, the initial swelling and the subsequent consolidation was observed. The initial volume increase is considered to be an unique characteristic of the AC consolidation.
社団法人地盤工学会の論文
1988-12-15