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利用改进的一维电渗固结试验装置对饱和软黏土进行电渗试验,通过监测电渗过程中的电流、电压、电势、排水量、电渗前后的含水率和抗剪强度,利用电渗透系数、电迁移系数、能耗系数来研究不同电源输出方式下的电渗排水状况。试验结果表明:相比于稳压输出方式,压流模式下的累积排水量更小且排水速率更慢,有效电势利用率变化幅度略小,电渗透系数和电迁移系数衰减得更快,含水率的总下降值和归一化抗剪强度略大;相比于稳流输出方式,流压模式下的累积排水量更大且排水速率更快,有效电势利用率变化幅度更小,电渗透系数和电迁移系数衰减得更慢,含水率总下降值和归一化抗剪强度更大。通过对不同电源输出方式下能耗系数递增速度的对比,得出流压模式下电渗工况更经济合理。
The improved one-dimensional electroosmotic consolidation test device was used to conduct the electro-osmosis test on saturated soft clay. By monitoring the current, voltage, potential, displacement, moisture content before and after electroosmosis and the shear strength during electroosmosis, , Electromigration coefficient, energy consumption coefficient to study the different power output mode of electro-osmotic drainage. The experimental results show that compared with the steady voltage output mode, the cumulative displacement and the drainage rate are lower under the pressure flow mode, the change range of the effective potential utilization is slightly smaller, the electric permeability coefficient and the electromigration coefficient decay more rapidly, And the normalized shear strength is slightly larger than that of the steady flow. Compared with the steady flow output, the cumulative displacement and the drainage rate are faster and the effective potential utilization rate is smaller. The electromigration coefficient decay more slowly, and the total water content decrease and the normalized shear strength are greater. By comparing the rate of increase of energy consumption coefficient under different power output modes, it is concluded that the electroosmosis condition in flow mode is more economical and reasonable.