逐级加载电压对电渗加固吹填土的影响

doi:10.13722/j.cnki.jrme.2014.12.025

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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。

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关键词 ：土力学, 逐级加载电压, 电渗, 能耗

Abstract：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.

Key words： soil mechanics applying stepped voltage electroosmosis energy consumption

收稿日期: 2013-10-21

引用本文:

刘飞禹1，宓炜1，王军2，符洪涛2. 逐级加载电压对电渗加固吹填土的影响[J]. 岩石力学与工程学报, 2014, 33(12): 2582-2591.
LIU Feiyu1，MI Wei1，WANG Jun2，FU Hongtao2. INFLUENCE OF APPLYING STEPPED VOLTAGE IN ELECTROOSMOTIC REINFORCEMENT OF DREDGER FILL. , 2014, 33(12): 2582-2591.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.12.025 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/I12/2582

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