线性堆载下软黏土一维电渗固结理论与试验分析

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摘要考虑线性堆载下水流和电流的相互作用以及孔隙水压力的消散情况，通过将单向渗流固结过程的普遍方程推广到电渗领域，建立线性堆载下软黏土一维电渗固结方程，并给出阴极排水、阳极不排水和阴阳极都排水2种情况下孔隙水压力和平均固结度的解析解。通过参数和试验分析，研究最大堆载和加载速率对孔隙水压力消散的影响，以及电压对理论固结度和试验固结度的影响，绘制不同最大堆载和加载速率时，单面排水和双面排水下孔隙水压力消散曲线、不同电压下理论固结度和试验固结度变化曲线。结果表明：最大堆载和加载速率越大，孔隙水压力消散得越快，同时最大堆载和加载速率对双面排水的影响要比对单面排水的更大；电源电压越大，理论固结度和试验固结度的增长速度都越快，在相同时间段内试验固结度的变化幅度小于理论固结度的变化幅度。

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关键词 ：土力学, 线性堆载, 电渗, 解析解, 孔隙水压力消散, 理论固结度, 试验固结度

Abstract：Taking into account the interaction between water flows and electrical currents as well as the pore pressure dissipation under the linear load，one dimensional electro-osmotic consolidation equation under linear load was established based on the extending consolidation process of the general seepage equation to the electro-osmotic field. The analytical solutions of the pole pressure and average degree of consolidation were given under two conditions of the cathode opened and anode closed and two poles opened. The effects of the maximum load and loading rate on the dissipation of pore pressure and the effect of supply voltage on theoretical consolidation degree and experimental consolidation degree were investigated by the method of parametric analysis and test analysis. The pore pressure dissipation curves in single and double drainage under different maximum loads and loading rates，and the curves of theoretical consolidation degree and experimental consolidation degree under different supply voltages were drawn. The results show that the greater maximum load and loading rate are，the faster dissipation speed of pore pressure is. At the same time，the effects of maximum load and loading rate on double drainage is greater than that on unilateral drainage. The greater supply voltage is，the higher the growth rate of theoretical consolidation degree and the experimental consolidation degree are，as well as the variable amplitude of theoretical consolidation degree is weaker than the variable amplitude of experimental consolidation degree in the period of time.

Key words： soil mechanics linear load electro-osmosis analytical solution pore pressure dissipation theoretical consolidation degree experimental consolidation degree

收稿日期: 2013-03-13

引用本文:

王军1，符洪涛1，蔡袁强1，曾芳金2，申矫健2. 线性堆载下软黏土一维电渗固结理论与试验分析[J]. 岩石力学与工程学报, 2014, 33(1): 179-188.
WANG Jun1 ，FU Hongtao1，CAI Yuanqiang1，ZENG Fangjin2，SHEN Jiaojian2. ANALYSES OF ONE DIMENSIONAL ELECTRO-OSMOTIC CONSOLIDATION THEORY AND TEST OF SOFT CLAY UNDER LINEAR LOAD. , 2014, 33(1): 179-188.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/I1/179

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