Abstract: A series of laboratory experiments were performed in a customized apparatus to investigate the effect of using electroosmosis and calcium chloride with percentages of 0，5% ，10% and 15% on reinforcing Wuhan silt clay． During the process of electrochemical treatment，the temporal evolution of electric current and drainage were monitored periodically． Also，the differences in moisture content，soil shear strength and microstructure before and after treatment were studied to assess the synchronous effect of electroosmosis and calcium chloride solution． The following conclusions can be drawn: injecting calcium chloride solution into anodic reservoir can significantly improve the efficiency of electroosmosis by shorting consolidation time and compacting soil microstructure，thus strengthening the properties of silt clay． Further，with injecting calcium chloride solution，the shear strength of cathodic soil increased by approximately 368. 6% ． However，there is a threshold value exists in the reinforcement effect，and the positive influence on reinforcing silt clay was negligible once the concentration of calcium chloride exceed 10% ． Adding calcium chloride solution would induce severe electrode corrosion，simultaneously．

Key words: silt clay, reinforce, electroosmosis, calcium chloride, shear strength, microstructure, electrochemical corrosion