Effect of electrochemical treatment on consolidation of soft clay

Xiaobing Li , Guohui Yuan , Hongtao Fu , Jun Wang , Yuanqiang Cai

Abstract

In this study, a method of electrochemical consolidation is applied. This method utilizes electro-osmosis, which is an effective ground improvement technique for soft clays, and soil treatment using lime, which is the oldest traditional soil stabilizer. The mechanism of lime treatment for soil involves cation exchange, which leads to the flocculation and agglomeration. Five representative laboratory tests-an electro-osmotic test and four electrochemical tests with various proportions of lime-were performed on dredged marine clay. The objectives of this study are to investigate the effect of electrochemical treatment and to determine the optimum dose for optimal consolidation performance of dredged marine clay. The results show that a better consolidation effect was achieved in terms of current, temperature, and vane shear strength by using electrochemical treatment. The best results were observed for the electrochemical test using 4% lime content.

Key Words

electro-osmosis, electrochemical treatment, lime, dredged marine clay, vane shear strength

Address

Xiaobing Li, Hongtao Fu and Jun Wang — 1.) College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang, China 2.) Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation, Wenzhou University, Wenzhou, Zhejiang, China 3.)Innovation Center of Tideland Reclamation and Ecological Protection, Wenzhou University, Wenzhou, Zhejiang, China
Guohui Yuan — College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang, China
Yuanqiang Cai — 1.) College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang, China 2.) Innovation Center of Tideland Reclamation and Ecological Protection, Wenzhou University, Wenzhou, Zhejiang, China 3.) Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou, Zhejiang, China

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