电渗处理软基的电极转换规律试验研究

发布时间：2018-03-11 20:30

本文选题：电渗　切入点：电极转换周期规律　出处：《岩土工程学报》2015年S1期 　论文类型：期刊论文

【摘要】：电渗处理软基过程中,为探寻电极转换周期规律,运用耐腐蚀的新型EKG电渗排水板分别进行了等时间周期、等排水量的电极转换试验。前者以单元土体为模型,通过观测电流、排水量随电极转换产生的变化以及数据分析,证明了等时间周期的电极转换不利于电渗排水;而后一组平行试验是以长方形土体为一维模型,控制等排水量以进行电极转换,记录电极转换时间以及周期并将数据进行数值拟合,揭示出一种呈指数函数的拟合曲线,并且运用铁作为电极材料也能得到理想的电极转换周期规律和相近的排水效果,但铁耐腐蚀性能较差,不可长期使用。最后将电极转换与常规电渗试验所得土体含水率和电导率分布示意图进行对比,证实了EKG电渗排水板进行等排水量的电极转换试验能获得处理均匀的土体,为EKG材料代替铁在电渗领域的运用提供可靠的试验依据。
[Abstract]:In the process of electroosmotic treatment of soft foundation, in order to find out the law of electrode conversion cycle, a new type of EKG electroosmotic drainage board with corrosion resistance was used to carry out the electrode conversion test of equal time period and equal displacement. The former was based on the model of unit soil and observed the current. The change of displacement with electrode conversion and the analysis of data show that the equal-period electrode conversion is not conducive to electroosmotic drainage, and the latter group of parallel tests is based on the rectangular soil mass as one dimensional model to control the equal displacement to carry out electrode conversion. The conversion time and period of the electrode were recorded and the data were fitted numerically to reveal a fitting curve with exponential function. The ideal electrode conversion cycle and similar drainage effect could also be obtained by using iron as the electrode material. However, the corrosion resistance of iron is poor and can not be used for a long time. Finally, the diagram of soil moisture content and conductivity distribution obtained by electrode conversion and conventional electroosmotic test is compared. It is proved that EKG electroosmotic drainage board can obtain uniform soil mass through the electrode conversion test of equal displacement, which provides a reliable experimental basis for the application of EKG material in the field of electroosmosis instead of iron.
【作者单位】：河海大学岩土力学与堤坝工程教育部重点实验室;河海大学岩土工程科学研究所;
【基金】：长江学者和创新团队发展计划资助项目(IRT1125) 中央科研业务费重点培育项目(2014B04914)
【分类号】：TU447;TU472

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