Abstract

Electroosmotic consolidation effect of electrode configuration and fracture grouting with sodium hydroxide were investigated. In this study, a series of laboratory tests were performed by using a homemade electroosmotic cell. Results indicate that electroosmotic consolidation that uses fracture grouting with sodium hydroxide effectively improved the mechanical properties of dredged clay sediment, and the optimised ratio of the number of cathodes to anodes was 1:2. In terms of drainage, current, water content, and vane shear strength, electroosmotic consolidation did not improve by increasing the number of cathodes. When the sodium hydroxide solution was injected into the soil, it neutralises the acidity near the anode, suppresses the development of electrode corrosion, reduces the voltage loss between electrodes, facilitates water drainage, and increases soil consolidation. The technique can provide design guidance for the treatment of dredged clay sediment.

摘要

研究了电极配置和氢氧化钠裂缝灌浆的电渗固结效果。在这项研究中，使用自制的电渗池进行了一系列实验室测试。结果表明，采用氢氧化钠裂缝注浆进行电渗固结有效地改善了疏浚黏土沉积物的力学性能，优化的阴阳数比为1:2。在排水、电流、含水量和叶片剪切强度方面，电渗固结并没有通过增加阴极数量而得到改善。当氢氧化钠溶液注入土壤时，它中和了阳极附近的酸度，抑制了电极腐蚀的发展，降低了电极之间的电压损失，有利于排水，并增加土壤固结。该技术可为疏浚黏土沉积物的处理提供设计指导。