摘要
利用自制电渗模型箱,采用电渗-化学灌浆联合方案处理顶管废弃泥浆,对其进行减量化研究.试验前,先将泥浆静置脱水,使泥浆试样含水率达到67.6%.电渗过程中加入氯化钙溶液作为灌浆材料,促进泥浆的排水固结.试验结束后采用微型贯入仪和微型十字板剪切仪等测量固化泥浆的各项强度指标,探讨顶管泥浆固结过程中含水率、沉降量、承载力等指标的变化规律.结果表明:通过电渗-化学灌浆联合处理,能够有效促进泥浆的排水,增强其导电性,提升泥浆的平均排水速率,有效缓解固化过程中裂缝的增长.同时,固化泥浆的承载力和抗剪强度增幅显著,大致呈现从阳极向阴极递减的趋势,且沉降较为明显.研究结果可为顶管废弃泥浆的减量化处理与资源化利用提供一定参考.
This study aims to conduct experimental investigations on electro-osmotic consolidation combined with chemical grouting for waste mud using self-designed electro-osmotic modeling tank.The tested mud was dehydrated to make the soil samples with water content of 67.6%.The calcium chloride solution was added as the grouting material in the laboratory tests to improve the efficiency in dewatering and consolidating.The strength parameters of the tested soil,including water content,displacement,bearing capacity,etc.,were measured using a mini penetrometer and a miniature shear vane tester to examine the tested soil properties.The test results indicated that the electro-osmotic consolidation combined with chemical grouting effectively improved the dewatering efficiency for the waste mud and increased the conductivity and average dewatering speed,along with the delayed development of crack formed in the consolidating process.Furthermore,the bearing capacity and shear resistance of the tested soil were significantly enhanced,and the soil capacity exhibited the reducing distribution from the anode to the cathode.The research results provid suggestions and references for the waste minimization and recycling utilization of waste mud.
作者
金海晖
张雷
王炳辉
贾仲泽
栾佶
JIN Haihui;ZHANG Lei;WANG Binghui;JIA Zhongze;LUAN Ji(School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212100,China;Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2023年第6期108-114,共7页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
江苏省研究生实践创新计划项目(SJCX22_1972)
江苏省自然科学基金资助项目(SBK20200996)
中国博士后科学基金项目(2020M681566)
国家自然科学基金资助项目(51978317)
江苏省博士后科研资助计划项目(2021K493C)。
关键词
电渗
化学灌浆
排水固结
顶管废弃泥浆
含水率
导电性
electro-osmosis
chemical grouting
drainage consolidation
waste mud
water content
electrical conductivity
