Experimental Study on the Effect of Potential Gradient on the Vacuum Preloading Combined with Anode Follow-up Electroosmosis
To solve the issue of the electrode corrosion and high energy consumption in the vacuum preloading combined with e-lectroosmosis,an improved method,namely,the vacuum preloading combined with the anode follow-up electroosmosis is pro-posed in this paper.The soil improvement effect of the vacuum preloading combined with the anode follow-up electroosmosis under different potential gradients was evaluated by a series of laboratory model tests.The test results show that the anode fol-low-up electroosmosis method with the pre-inserted electrode can significantly improve the soil strengthening effect.Compared with the vacuum preloading combined with the electroosmosis,the vacuum preloading combined with the anode follow-up elec-troosmosis methods can increase the water discharge by 31.3％,the average soil surface settlement increase by 15.9％,the o-verall water content in the improved soil is also lower.The vacuum preloading with the high potential gradient combined with the anode follow-up electroosmosis method can improve the overall soil strengthening effect,while the soil homogeneity with the low potential gradient is better and the energy consumption per unit water discharge is lower.
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