RESEARCH ARTICLE


Electro-Osmosis Chemical Treatment of High-Salinity Soft Marine Soils: Laboratory Tests



Lei Zhang1, Li-ping Jing1, *, Ning-wei Wang2, Chen Fang3, Yong-qiang Li1, Zhen-dong Shan1
1 Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
2 School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China
3 Department of Civil Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA


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© Zhang et al.; Licensee Bentham Open

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China; Tel: +86-130-3999-79-363, +86-185-0210-2765; E-mails: ray_iem@163.com, jing_liping@126.com


Abstract

The electro-osmosis chemical treatment (ECT) is a useful method for improving soil strength. Some laboratory tests on ECT for strengthening high-salinity soft marine soils were investigated using self-designed laboratory facilities in this research. This study focused on improving the mechanical properties by using ECT method and analyzed the effects of using CaCl2 solution on soil strength owing to the electrolyte is an important factor for improving the bearing capacity of the high-salinity marine soils. Three groups of tests with different time for consolidation were performed to analyze the effective consolidation time on the ECT. In addition, several practical issues, including the current, voltage, energy consumption and the bearing capacity of the treated soils before and after experiments, were considered in the tests. The laboratory tests results demonstrated that the ECT technique is an effective method for improving the high-salinity marine soft soils. Furthermore, the definition of the effective time for consolidation was proposed for the ECT of high-salinity soft marine soils to improve the feasibility and economical efficiency of the ECT. This study provides some references and suggestions for practical application of the ECT technique for marine soft soils.

Keywords: High-salinity soft marine soils, Electro-osmosis chemical treatment, Effective time for consolidation, Bearing capacity, Calcium chloride solution.