考虑有效电势变化的软土一维电渗固结理论  

1-D electro-osmotic consolidation theory considering variation in effective potential in soft soil

作　　者：龚明星[1] 王档良[1] 詹贵贵 

机构地区：[1]中国矿业大学资源与地球科学院,江苏徐州221116 [2]中国矿业大学化工学院,江苏徐州221116

出　　处：《水文地质工程地质》2015年第4期61-66,共6页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目(51204183)

摘　　要：通过前人研究成果和电渗室内试验,发现了电渗中有效电势先随时间线性减小后保持不变的规律。将此规律作为基本假设,与Esrig一维电渗固结理论相结合,列出了工程中常见的阳极不排水、阴极排水情况下考虑有效电势变化的一维电渗固结方程。求解出了考虑有效电势变化的孔隙水压力和平均固结度的解析式。与实际情况相比,考虑有效电势变化的一维电渗固结理论解较Esrig理论解误差更小,将两理论进行了对比,求出了任意时刻排水量的误差减少量,为实际工程提供参考。On the basis of previous studies and the electro-osmotic indoor experiment,it is founded that the effective potential obeys the law of declining linearly first and then remaining unchanged. Taking this law as a basic assumption,and combining the assumption with the Esrig 1-D electro-osmotic consolidation theory,this paper lists 1-D electro-osmotic consolidation equation of the situations of anode closed and cathode open considering the effective potential change. The equation of anode closed and cathode open is solved,and the analytic formula of the pore water pressure and the average degree of consolidation considering the effective potential change is derived. Compared with the actual situation,the deviation of solution of 1-D electroosmotic consolidation theory considering effective potential change is smaller than that of the Esrig theory.Compared with two electro-osmotic consolidation theories,the error reduction of displacement at any time is calculated.

关 键 词：有效电势 电渗固结方程 孔隙水压力 平均固结度 

分 类 号：TU411.5[建筑科学—岩土工程]