Upward gradient EKG and electro-osmosis for deep soft ground consolidation

Yan-feng Zhuang, Zhitao Liu, Zhengxin Li, Hongwei Wang, Tong Yang, Ganglin Li. Upward gradient EKG and electro-osmosis for deep soft ground consolidation. 11th International Conference on Geosynthetics, 16th-21st September, 2018, KGSS, Seoul, Korea. (Flash Disk, paper SS3-01)

ABSTRACT:
Electro-Kinetic Geosynthetics (EKG) presents a new category of geosynthetics. It inspires enthusiasm to apply electro-osmosis (EO) in large scale engineering applications, such as soft ground improvement, sludge dewatering, soil remediation, etc. This paper presents a kind of specially designed EKG and DC power source to carry out electro-osmotic consolidation for soft ground in vertical direction instead of horizontal direction. It is aiming at providing a better consolidation effect without degradation along depth for deep soft ground improvement. In-situ experiment shows that bearing capacity of the hydraulically filled sludge could be increased to 80-90 kPa after upward gradient electro-osmosis treatment and consolidation effect along depth is more homogenous than that of horizontal electro-osmosis using normal E-board. Development of EKG materials and automated DC power source are two key breakthroughs that pushing forward both researches and applications EO technique, which has over 200 years of history already.

Keywords: Electro-osmosis; EKG; consolidation; soft ground improvement

Upward gradient EKG and electro-osmosis for deep soft ground consolidation