EVD与金属电极电渗对比试验研究

电极材料是制约电渗法发展的关键因素,在室内试验中开展导电塑料排水板(EVD)与铁、铜、铝金属电极的电渗对比试验,通过对土体中电流、电势及排水量、加固后土体含水率等数据的分析,研究了EVD电极与金属电极的电渗加固效果差异。试验结果表明EVD可以作为电渗电极使用,在通电一段时间后其导电性能要优于金属电极,由于设计试验排水方案为水平侧向排水,不能凸显EVD的竖向排水优势。铝作为阴极时,由于其金属的活泼性较强,发生溶解、销蚀形成凝结剂物质,从而以电化学加固的形式降低了阴极附近土体的含水率,因而电渗法可以通过在阴极处制造局部的电化学反应来降低阴极附近土体的含水率。

Comparative Experiment of Electro-osmosis of EVD and Metal Electrode

Electrode material is a key factor for the development of electroosmosis. Comparative experiment of electroosmosis of electric vertical drain (EVD) and metal electrode was made in laboratory. Compare the electroosmotic strengthing effects of different electrodes by analyzing data on current, potential, water discharge and moisture content of renforced soil. Experimental results showed that EVD can be used as electrode whose conductivity was superior to metal electrodes after electricity some time. In this experiment, the vertical discharge advantage of EVD has not demonstrated due to a problem with drainage scheme. When aluminum was used as cathode, it was dissolved and eroded and formed coagulant like substances. So the moisture content of soil around the cathode was decreased by electrochemistry reinforcement. This can be served as a way to decrease the moisture content of soil around the cathode.