生活源污染土电渗加固试验

发布时间：2018-12-19 07:20

【摘要】：为了研究生活源污染土的电渗加固特性,在改进的Miller Soil Box中进行生活源污染土电渗排水试验.分析含水量降低百分比、单位排水量能耗、抗剪强度、土体沉降4个参数,得出影响生活源污染土电渗排水加固效果的主次因素顺序:电源电压通电时间初始含水量CaCl2添加量电极材料.结果表明:电源电压极差最大,对生活源污染土电渗加固处理效果起到主要作用;考虑经济成本和电渗效率,通电时间不宜过长,否则能耗系数会急剧增大;CaCl2添加量越高则初始电流越大,但CaCl2含量过高反而会导致排水量减少;铁和铜电极排水效果最好,铝电极的能耗最小,石墨电极的电渗效果最差,建议在实际工作中选用铁电极.最后验证了电渗加固的最优组合及水平,并与普通土的加固效果进行对比分析.
[Abstract]:In order to study the characteristics of electroosmotic reinforcement of live-source contaminated soil, an electroosmotic drainage test was carried out in an improved Miller Soil Box. Four parameters such as water content reduction percentage, energy consumption per unit displacement, shear strength and soil settlement are analyzed. The sequence of primary and secondary factors affecting the effect of electroosmotic drainage on contaminated soil is obtained: the initial water content of power supply voltage electrification time CaCl2 adding electrode material. The results show that the maximum voltage difference of power supply plays a major role in the treatment effect of electroosmotic treatment of contaminated soil, considering the economic cost and electroosmotic efficiency, it is not necessary to keep the power supply time too long, otherwise the energy consumption coefficient will increase sharply. The higher the amount of CaCl2 is, the larger the initial current is, but the higher the content of CaCl2 is, the lower the displacement is. Iron and copper electrodes have the best drainage effect, aluminum electrodes have the least energy consumption, and graphite electrodes have the worst electroosmotic effect. It is suggested that iron electrodes should be used in practical work. Finally, the optimal combination and level of electroosmotic reinforcement are verified, and the results are compared with that of ordinary soil.
【作者单位】：浙江大学滨海和城市岩土工程研究中心;浙江大学宁波理工学院;中国矿业大学资源与地球科学学院;
【基金】：国家自然科学基金项目资助项目(51378469;41372326) 浙江省公益技术应用研究资助项目(2017C33034)
【分类号】：TU472.5

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