電滲透化學灌漿工法於現地試驗的電極佈置方式，目前仍採用電滲透排水工法研究所建議的值進行試驗；對於電滲灌漿試驗的結果，膠結硬化僅發生在靠近電極管周圍的情況，若電極佈置失當，改良的範圍將遠不如預期。本研究以室內模型試體，對高嶺土灌入氯化鈣溶液進行電滲透化學灌漿試驗。試驗設計對於不同電極尺寸、不同輸入電壓及鄰近兩對電極，在電力相互影響下，對不同電極間距進行試驗。電滲試驗結束後量測土樣鈣離子含量、pH值及於負極膠結的改良範圍，來分析負極土壤於電場作用下的膠結改良範圍。最後以試驗的結果配合理論，提出現地適當電極間距佈置的預測方法。研究結果顯示：當負極附近土內pH值達到9以上的區域，均可產生膠結硬化反應。小電極鈑尺寸，在不受儀器邊界影響下，其膠結形狀會受電場強度分佈的影響，於電極鈑向外形成圓柱體。以4種不同電極鈑尺寸，在輸入電壓17.5V的情況下，其膠結範圍的延伸半徑均為40mm。隨著土內電場強度放大N倍，其膠結延伸半徑放大N^0.5倍，並經由此關係，可由一組試驗結果，對其他試驗條件的改良範圍作預測。

Nowadays the electrode arrangement of the electroosmotic chemical grouting in the field still adopts that suggested in the pure electroosmotic method because of deficiency in research. Therefore, the cemented zone of soil often occurs only near the electrode pipe. If the electrode arrangement is inappropriate, the cemented zone will be less than expected. The objective of this study is to investigate the cemented zone when calcium chloride solution is used as an injection material. A series of laboratory electroosmotic chemical treatment tests was carried out for different electrode sizes, input voltages and spacing of steel pipes. After the tests, cemented zones, pH values, cone resistances, water contents, and concentrations of Ca2+ in kaolinite at different locations were measured and discussed. Finally, the experimental results are analyzed with a suitable theory of electricity. Results show that the cemented zone normally occurs when pH values near the cathode is greater than 9. for small size of electric plates, which the boundary of the electroosmotic cell does not restrained from the development of cemented zones, the shape of cemented zones are highly related to the electric field and close to cylinder centering to the electric plate. The extensions of cemented zones for four different sizes of electro-plates are all equal to 40 mm. The extension of cemented zones is enlarged to N^0.5 times when the electric field increases by N times. A simple method is thus developed to estimate the possible range of cemented zone for different sizes of electrodes based on an electroosmotic experimental result.

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