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在自制的模型箱中进行一维电渗排水试验,通过监测排水量、电势分布、含水率和电流来研究不同电源电压对电渗排水的影响。试验结果表明:较大的电压会导致排出单位体积水所需的能量消耗较高;较大的电压和较短的电渗时间会导致土体含水率分布异常,两极中间最高,阳极附近最低;排水量的逐渐减小是因为电极接触电阻的增大和电渗渗透系数的减小;电极和土体接触面上存在的接触电阻使得实际用于电渗的电压小于电源输出电压,而且电源电压越大,阳极接触电阻随电渗时间增加的速率越快,但是阴极接触电阻在高电压时缓慢增长,在低电压时迅速增大,而这与电渗排水速率有关。
One-dimensional electroosmotic drainage test was carried out in a self-made model box to study the effects of different power supply voltages on the electro-osmosis drainage by monitoring displacement, potential distribution, moisture content and current. The results show that the larger voltage will lead to higher energy consumption for discharging water per unit volume. The larger voltage and shorter electroosmotic time will lead to the abnormal distribution of soil moisture content, the highest in the middle of the two poles and the lowest in the vicinity of the anode. The gradual decrease of displacement is due to the increase of the electrode contact resistance and the decrease of the electroosmotic permeability coefficient. The contact resistance existing on the contact surface of the electrode and the soil body makes the voltage actually used for electroosmosis less than the output voltage of the power supply, and the larger the power supply voltage , The contact resistance of the anode increases as the electroosmotic time increases, but the cathodic contact resistance increases slowly at high voltage and increases rapidly at low voltage, which is related to the electroosmotic drainage rate.