真空预压联合电渗法处理软土试验研究  

Experimental study on soft soil treatment by vacuum preloading combined with electroosmosis

作　　者：刘巍巍[1] 娄晨阳 陈博涵 LIU Weiwei;LOU Chenyang;CHEN Bohan(Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China;Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]黄河水利科学研究院,河南郑州450003 [2]河南工业大学,河南郑州450001

出　　处：《水利建设与管理》2022年第12期19-23,44,共6页Water Conservancy Construction and Management

基　　金：国家自然科学基金(42041006-04-03);水利部堤防安全与病害防治工程技术研究中心开放课题基金(LSDP202106)。

摘　　要：本文在对大连大窑湾港区软土进行真空预压与电渗联合作用试验的基础上,分析了试验软土出水量及出水速率、含水率、抗剪强度等参数的变化规律,探讨了真空预压法和电渗法处理软土的效果。结果表明:真空预压与电渗联合作用后土体发生变形,阳极附近土体颜色改变,作用效果明显;联合作用的不同阶段,真空预压和电渗排水作用程度不同,土体出水量和出水速率有差异。试验结束后,土体含水率减少了37.4%,真空预压的作用范围主要集中在土体表层和排水板附近;电渗对阳极附近的土体排水起主要作用。土体的抗剪强度提高程度与阴极和阳极的位置有关,电渗法对土体抗剪强度的提高有一定的作用。Based on the experiment of the soft soil in Dalian Dayaowan port area by the combined action of vacuum preloading and electroosmosis,this paper analyzes the variation law of parameters such as water output,water output rate,water content and shear strength,and discusses the effect of vacuum preloading and electroosmosis in treating soft soil. The results show that the soil is deformed and the color of the soil near the anode is changed after the combined obvious effect of vacuum preloading and electroosmosis. In different stages of combined action,the drainage degree of vacuum preloading and electroosmotic is different,and the soil water output and water output rate are different. After the experiment,the moisture content of soil decreases by 37. 4%,and the range of vacuum preloading mainly concentrates on the surface of soil and near the drainage plate. Electroosmosis plays a major role in soil drainage near the anode. The improvement degree of shear strength of soil is related to the position of cathode and anode,and the electroosmosis method has a certain effect on the improvement of shear strength of soil.

关 键 词：港区 软土地基 真空预压 电渗 联合作用 

分 类 号：TV522[水利工程—水利水电工程]