摘要
电渗加固过程中常将真正作用于土体两端的电压称为有效电势,这是因为土体与电极之间接触电阻的存在会使得实际作用于土体两端的电压要远小于施加的电源输出电压。如果在电渗固结方程中不考虑该影响,其结果会高估电渗处理效果。为了能够更加合理反映电渗过程中土体固结情况,通过电渗试验探究了有效电势变化规律,结果表明了土体有效电势会随电渗持续开展显著降低,采用对数函数能够很好拟合其变化规律。基于此,本文又推导了考虑土体有效电势变化规律的阳极不排水、阴极排水情况下一维电渗固结方程。最后结合模型试验案例对所得方程的合理性进行了验证,有效证明了方程的合理性。
In the process of electro-osmotic reinforcement,the voltage that actually acts on both ends of the soil is often referred to as the effective voltage of the soil. It is because the existence of the contact resistance between the soil and the electrodes will make the voltage acting on both ends of the soil much smaller than the applied power output. If this effect is not considered in the electro-osmotic consolidation equation,the result will overestimate the result of electro-osmotic treatment. In order to reflect the consolidation of soil in the process of electro-osmotis more reasonably,this paper firstly explored the law of effective voctage variation through electro-osmotic test. The results show that the effective voltage of soil will decrease significantly with the continuous development of electrification process. The logarithmic function can fit its changing law well.Based on this,this paper also deduced the one-dimensional electro-osmotic consolidation equation considering the undrained anode and the drained cathode condition of the law of effective voltage change of the soil. Finally,the rationality of the obtained equation was verified in combination with model test cases,which effectively proved the rationality of the equation.
作者
阳龙
李少宇
YANG Long;LI Shaoyu(College of Civil and Transportation Engineering,Hohai University,Nanjing 210024,China)
出处
《粉煤灰综合利用》
CAS
2020年第6期35-40,115,共7页
Fly Ash Comprehensive Utilization
关键词
电渗固结方程
土体有效电势
对数函数
超静孔隙水压力
electro-osmotic consolidation equation
effective voltage of soil
logarithmic function
excess pore water pressure
