【摘要】 本文采用自制的电渗试验装置，对广州南沙区淤泥质黏土进行室内电渗试验，探讨阳极添加氯化钙溶液对电渗加固软土效果的影响。通过监测4组电渗试验过程中电流值、排水量和沉降量的变化，测试电渗后土体的抗剪强度和微观结构差异，进而评估氯化钙下不同浓度的土体电渗固结效果，得出以下结论：在阳极添加氯化钙溶液可以增强土体电导率，提高土体电渗排水量；电场作用下Ca²⁺离子与OH-离子反应生成胶结物质，从而使阴极附近土体抗剪强度显著增大；氯化钙的加入改变了土颗粒接触方式，土体微观结构更加紧密，粒间孔隙显著降低；氯化钙对土体电渗加固效果的提升存在一个限值，本次试验为12.0%左右，超过此限值后，氯化钙的存在反而不利于淤泥质黏土的电渗排水。更多还原

【Abstract】 A series of electroosmosis laboratory tests on Nansha mucky clay were conducted in the self-made apparatus to investigate the effect of calcium chloride on electroosmosis.In this work,four soil samples treated with different concentrations of calcium chloride were treated with electroosmosis.By analysing the difference of electric current,drainage,shear strength,settlement and microstructure of soil samples,the efficiency of electroosmosis incorporated with calcium chloride were assessed. The conclusions can be obtained as follows:Adding calcium chloride solution can effectively improve the soil’s conductivity,increasing the final electric drainage;Under the action of electric field,Ca²⁺ ions reacted with OH^-ions to form cementing agents,which significantly increased the shear strength of soil near the cathode;The addition of calcium chloride changed the contact mode of soil particles,the soil microstructure became tighter and the intergranular pores decreased significantly;There was a reasonable range for calcium chloride to improve the electroosmotic reinforcement effect,which was about 12.0% in this work.When the limit was exceeded,calcium chloride was not conducive to electroosmotic drainage.更多还原