近年研究顯示，在電動力化學灌漿工法中，增加給定的電壓可以提高電滲透的效果，進而降低試驗時間。其結果能有效增加室內錐頭阻抗強度至中間區域，但中間至負極區域之強度仍不理想。這種現象的發生可能是由於化學溶液的高流速隨著電壓的升高而引起的。因此，為改善此問題，本研究嘗試: (一) 給定電壓35V下，觀察氫氧化鉀溶液在土壤中的物化性質及溶液在土壤中流動狀況；(二) 給定電壓35V下，觀察矽酸鈉溶液在土壤中的物化性質及溶液在土壤中流動狀況；(三) 排除氯化鈣的影響，觀察灌入去離子水後的強度發展；(四) 藉由前三階段的結果，歸納出電動力化學灌漿中強度增加的機制。研究結果指出，由於前三個階段缺乏氯化鈣的參與，土壤中電滲透作用減弱，導致排水和電化學反應的效果不好。此外，本研究藉由控制鹼性溶液的灌注時間，解決了遠離陰極處(FC)酸鹼值過高的問題，然而也因此導致了灌注量不夠的現象。

Recent studies have shown that in ECT, the increasing voltage can improve the effect of electroosmosis, thereby reducing the duration. As a result, the strength of treated soil increased from anode to middle area, however, the strength from middle to cathode area still remained weak. The occurrence of this phenomenon may be due to the high flow rate of the chemical solution as increasing voltage. Therefore, in order to improve it, this study attempts to: (1) Observe the physical and chemical characteristic and flow modes of potassium hydroxide solution in the soil at a given voltage of 35V; (2) Observe the physical and chemical characteristic and flow modes of sodium silicate solution in the soil at a given voltage of 35V; (3) Exclude the effect of calcium chloride and observe the strength improvement after the injection of deionized water; (4) Based on the results of the first three phases, the mechanism for the strength improvement of ECT tests would be summarized. Results indicate that due to the absence of calcium chloride in first three phases, the effect of electroosmosis in the soil was reduced, leading to the poor effects of drainage and the electrochemical reaction. In addition, this study solved the problem of high pH value at FC by shortening the injection time of the alkaline solution, but it also caused the phenomenon of insufficient injection.

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