分层强夯联合电渗法处理疏浚淤泥宏细观试验研究  

Macro and Micro Experiment on Dredged Slurry Treatment by Layered Dynamic Compaction Combined with Electro-osmosis Method

作　　者：杨展鹏 汤家郗 宋琢 YANG Zhanpeng;TANG Jiaxi;SONG Zhuo(Guangyuan Municipal Construction Co.,Ltd.,Guangzhou 510040,China;Department of Civil Engineering,Shanghai University,Shanghai 200444,China;Canton One Construction Group Co.,Ltd.,Guangzhou 510040,China)

机构地区：[1]广州市广园市政建设有限公司,广州510040 [2]上海大学土木工程系,上海200444 [3]广州一建建设集团有限公司,广州510060

出　　处：《华南地震》2022年第3期85-93,共9页South China Journal of Seismology

基　　金：国家自然科学基金项目(51878402)。

摘　　要：为提高强夯联合电渗法处理疏浚淤泥的效果,提出了分层强夯联合电渗法处理疏浚淤泥的方法。设计了4组室内模型试验,分别采用纯电渗、分1层、2层及3层强夯联合电渗法对疏浚淤泥进行处理,研究分层强夯联合电渗法的处理效果,并通过扫描电镜分析了试验后阴极附近土体的孔隙特征。结果表明:分层强夯联合电渗法加固效果优于纯电渗法,且分层数越多、促进效果越好;分3层强夯的排水量达到6.35 kg、电流强度的衰减得到了较好的抑制效果;分3层强夯比纯电渗法的排水量增加了37.15%,十字板剪切强度增加了41.42%;电镜扫描结果显示,分3层强夯时阴极附近的土体裂缝明显减少,均一化程度最高。In order to improve the effect of treating dredged slurry, the method of layered dynamic compaction combined with electro-osmosis was proposed. 4 groups of laboratory model tests were designed,and the dredged slurry was treated by pure electro-osmosis, 1-layer, 2-layer and 3-layer dynamic compaction combined with electro-osmotic method. The paper studied the treatment effect of layered dynamic compaction combined with electro-osmosis, and analyzed the pore characteristics of the soil near the cathode by scanning electron microscope. The results show that the reinforcement effect of layered dynamic compactions combined with electroosmosis is better than that of electro-osmosis alone,and the more layers,the better the promotion effect;the drainage of the 3-layered is 6.35 kg and the attenuation of current is well restrained;the drainage of 3-layered compared with electro-osmosis increased by 37.15% and the vane shear strength increased by 41.42%;the SEM results showed that the soil cracks near the cathode were significantly reduced and the degree of homogenization was the highest during 3-layered dynamic compaction.

关 键 词：地基处理 宏观结构 细观结构 电渗法 疏浚淤泥 

分 类 号：U416.1[交通运输工程—道路与铁道工程]