摘要
本研究利用自制的室内电渗排水固结装置,对福建省安溪县典型崩岗红土层、砂土层、碎屑层进行电动加固试验.通电过程中通过改变CaCl2溶液浓度,分析3个土层电流、排水量及排水速率变化特征,研究电化学加固对土体含水率及抗剪强度的影响.结果表明:电化学加固下,红土层的抗剪强度与CaCl2溶液浓度成正相关关系,当CaCl2溶液浓度为35%时加固效果最好,但同时土体含水率和抗剪强度分布不均现象明显,阴极区域含水率和粘聚力分别比阳极区域大50.11%和36.01%;相比于普通电渗法,砂土层、碎屑层阳极区域粘聚力分别增加了107.27%、93.98%,阳极区域土体抗剪强度有显著提高,中间区域及阴极区域受CaCl2溶液浓度影响的规律不明显.
Self-made indoor electroosmotic drainage and consolidation device were used to conduct electrodynamic consolidation experiments on typical collapsed red soil, sand and clastic layers in Anxi County, Fujian Province. The characteristics of current, drainage volume and rate of three soil layers were analyzed by changing the concentrations of CaCl2 solution. The effects of electrochemical reinforcement on the water content and shear strength of soils were studied. The results showed that under electrochemical reinforcement, the shear strength of red soil layer was positively correlated with the concentration of CaCl2 solution. The setup achieved optimum reinforcement efficacy when the concentration of CaCl2 solution was 35%. However, water content and shear strength was unevenly distributed during this process. Water content and cohesion in the cathode area were 50.11% and 36.01% higher than those in the anode area. Compared with the conventional electroosmosis method, shear strengths of sand layer and clastic layer increased significantly, with the cohesion increased by 107.27% and 93.98%, respectively in the anode area. But the influence of CaCl2 concentration in the middle and cathode regions of sand layer and clastic layer remained insignificant.
作者
汤海艳
黄炎和
林强
田培聪
蒋芳市
葛宏力
魏佳
陈嘉林
林金石
TANG Haiyan;HUANG Yanhe;LIN Qiang;TIAN Peicong;JIANG Fangshi;GE Hongli;WEI Jia;CHEN Jialin;LIN Jinshi(College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Fujian Soil and Water Conservation Test Station,Fuzhou,Fujian 350001,China)
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2020年第2期240-247,共8页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
国家重点研发计划项目(2017YFE0118100)
国家自然科学基金项目(41571272).
关键词
电化学加固
崩岗
电渗法
抗剪强度
排水速率
electrochemical reinforcement
collapsed hill
electroosmosis
shear strength
drainage rate
作者简介
汤海艳(1995-),女.研究方向:土壤侵蚀与治理.Email:tanghy0920@163.com;通信作者:林金石(1980-),男,教授,博士.研究方向:土壤侵蚀与治理.Email:linjs@163.com.
