周期性裂缝灌浆对电渗处理淤泥软土的影响  

Influence of intermittent fracture grouting electroosmosis for dredged slurry st reng thening

作　　者：刘飞禹[1] 周杰 王军[2] 李玲玉 LIU Feiyu;ZHOU Jie;WANG Jun;LI lingyu(Department of Civil Engineering,Shanghai University,Shanghai 200444,China;College of Architecture and Civil Engineering,Wenzhou University,Wenzhou 325035,China)

机构地区：[1]上海大学土木工程系,上海200444 [2]温州大学建筑工程学院,浙江温州325035

出　　处：《上海大学学报（自然科学版）》2020年第4期651-661,共11页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(51878402)。

摘　　要：电渗过程中由于土体裂缝的开展导致土体电阻增大、电渗效率降低,裂缝灌浆是解决这个问题的方法之一。在等电势梯度的前提下,设计了5组一维固结电渗对比试验,并采用质量分数为1.5%的NaOH溶液进行裂缝灌浆,通过对比不同频率下电渗试验的排水量、排水速率、沉降等数据,分析了灌浆频率对电渗加固效果的影响。结果表明,裂缝灌浆能明显提高电渗加固的效果;试验存在最优灌浆频率,且当采用最优频率时,可延长电渗通电时间,使得土体含水量和有效排水能耗降到最低。During electro-osmosis,the electrical resistance of the soil increases and electroosmotic efficiency decreases owing to the appearance of fractures in the soil.Fracture grouting is a method that can be applied to solve this problem.In this study,under the equipotential premise gradient,experimental laboratory tests through electro-osmosis were performed to investigate the effects of various fracture-grouting intermittence frequencies using 1.5%NaOH solution on each of five dredged slurry samples.The results were analysed based on the extracted water mass,drainage rate,surface settlement,electric current,energy consumption effect,water content,and undrained vane shear strength.The results showed that fracture grouting could improve the effect of electro-osmosis.In addition,the experimental findings indicated that an optimal grouting ratio existed,which effectively decreased the water content,increased the vane shear strength,and reduced the energy consumption effect.

关 键 词：电渗 裂缝灌浆 周期性 淤泥软土 

分 类 号：TU447[建筑科学—岩土工程]