Effects of Anodic Grouting with Different Solutions During Electro-osmosis on a Soft Foundation Treatment

被引：0

作者：

Liu F.-Y. ^{[1
]}

Li L.-Y. ^{[1
]}

Wang J. ^{[2
,3
,4
]}

Fu H.-T. ^{[2
,3
,4
]}

Cai Y.-Q. ^{[5
]}

机构：

[1] Department of Civil Engineering, Shanghai University, Shanghai

[2] School of Architecture and Civil Engineering, Wenzhou University, Wenzhou, 325035, Zhejiang

[3] Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation, Wenzhou University, Wenzhou, 325035, Zhejiang

[4] Innovation Center of Tideland Reclamation and Ecological Protection, Wenzhou University, Wenzhou, 325035, Zhejiang

[5] Key Laboratory of Soft Soil and Environmental Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang

来源：

Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2019年 / 32卷 / 03期

关键词：

Alkaline solution; Anodic grouting; Electro-osmosis; Electrochemistry; Ground treatment; Road engineering;

D O I：

10.19721/j.cnki.1001-7372.2019.03.005

中图分类号：

学科分类号：

摘要：

To improve the effectiveness of electro-osmosis treatment of soil, the effects of adding chemical solutions during electro-osmosis on the reinforcement of a soil foundation were investigated. Self-made model boxes were used under an equal electric potential gradient of 0.5 V•cm -1 to conduct an experimental investigation of anode grouting with different solutions. The solutions tested included sodium hydroxide, sodium chloride, calcium hydroxide, and calcium chloride, and were applied as grouting when the soil was separated from the anode plate. The number of anions added to each sample was equal. The concentration of the sodium solutions was 2.0 mol•L-1, and that of the calcium solutions was 1.0 mol•L-1. Each test sample was grouted with 50 mL of solution after 15 h. Parameters such as the electric current, drainage rate, and coefficient of energy consumption during the electro-osmosis process, as well as the moisture content, electrical conductivity, and shear strength after the tests were analyzed. The results show that adding a chemical solution can clearly improve the drainage and strength. Compared with the control group, the average moisture content decreases by more than 10.5% to 34.7%, while the shear strength increases by 27.3% to 44.6%. The substance produced by the reaction of hydroxyl groups with the soil-filled pores increases the compactness and strength but blocks drainage paths. The effects of treatment with the chloride solution are superior; however, the electrode corrosion and average energy consumption are greater than that of the alkali solution. Calcium ions are better than sodium ions for improving drainage and electrical conductivity. The treatment with calcium chloride is the most effective among the four types of chemical solutions tested. © 2019, Editorial Department of China Journal of Highway and Transport. All right reserved.

引用

页码：44 / 52

页数：8

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