摘要
在自制的模型箱中对吹填土进行一系列逐级加载电压的一维电渗试验,通过监测电流强度、出流量和电势分布,分析最终含水率、抗剪强度、能耗系数和电渗透系数等指标,研究逐级加载电压对电渗加固吹填土效果的影响。试验结果表明,不同方案的逐级加载电压对吹填土的处理效果有较大区别;相比于连续施加25 V电压的方案,合理的逐级加载电压方案能降低电能消耗,提高电渗排水量以及后期电渗效率,增大阴极附近土体的抗剪强度,使土体加固地更均匀;适当地提高初始加载电压能够显著增加电渗的排水量,但初始电压过高,不仅土体加固效果不明显,而且电压损耗还会更大。
A series of one-dimensional electroosmotic consolidation experiments with the test tank built in-house were carried out on dredger filling. The current intensity,the drainage and the electric potential were monitored. The final water content,the shear strength,the coefficient of electroosmotic permeability,and some other indices were analyzed to investigate the influence of applying stepped voltages on electroosmotic consolidated dredge fillings. Test results showed that different programs of stepped voltage yielded quite different treatment efficiencies for dredge fillings;In comparison to applying 25 V constantly,the technique of stepped voltage reduced energy consumption,improved electroosmotic efficiency at later stage and raised water drainage, enhanced the soil shear strength near the cathode region effectively and reinforced the soil more homogeneous. Appropriately raising the initial voltage increased the water discharge of electroosmosis significantly. Very high initial voltage did not lead to further improvement in soil consolidation,but to more energy consumption.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2014年第12期2582-2591,共10页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51278383)
国家自然科学基金重点项目(51238009)
上海市自然科学基金资助项目(14ZR1416100)
关键词
土力学
逐级加载电压
电渗
能耗
soil mechanics
applying stepped voltage
electroosmosis
energy consumption
