摘要
海相吹填土黏粒含量、含水率和压缩性都很高,抗剪强度低,渗透性差,后期施工时地基沉降量大,稳定性较差,难以满足工程实际需要,须先行有效排水加固进行地基处理。电渗联合注浆加固吹填土多为室内模型试验研究,现场试验及应用较少,为提高吹填土地基承载力及进一步探究电渗联合注浆法加固吹填土地基的可行性和加固效果,依托具体工程进行现场试验,在无砂垫层真空预压法处理地基的基础上,采用电渗联合注浆的方法加固新近吹填土。结果表明:与无砂垫层真空预压法相比,电渗联合注浆的方法加固时间可缩短30 d以上,地基承载力可提高1.6倍。电渗联合注浆是一种快速加固高含水率、低渗透性的海相吹填土的有效处理方法。
The clay content,water content and compressibility of marine dredger fill are very high,which results in its low shear strength,poor permeability,and for the very same reason its foundation settlement is large and its stability is poor in the later stage of construction,so it is difficult to meet the actual needs of the project.Therefore,effective drainage and consolidation should be carried out.In order to improve the bearing capacity of dredger fill foundation and further explore the feasibility and reinforcement effect of electro-osmosis combined grouting method for dredger fill foundation,field tests are carried out relying on specific projects.On the basis of vacuum preloading without sand cushion,electro-osmosis combined grouting method is adopted to treat dredger fill foundation.Reinforcement of newly dredged fill.The results show that compared with the vacuum preloading method without sand cushion,the consolidation time of electroosmosis combined with grouting can be reduced by more than 30 days,and the bearing capacity of foundation can be increased by 1.6 times.Electro-osmosis combined grouting is an effective method for rapid reinforcement of marine dredger fill with high water content and low permeability.
作者
吴松华
徐勇平
WU Songhua;XU Yongping(CCCC Water Resources and Hydropower Construction Co.,Ltd.,Ningbo,Zhejiang 315200,China)
出处
《水利与建筑工程学报》
2019年第6期77-81,共5页
Journal of Water Resources and Architectural Engineering
关键词
吹填土
电渗
注浆
电极
电化学加固
真空预压
化学电渗法
dredger fill
electroosmosis
grouting
electrode
electrochemical reinforcement
vacuum preloading
chemical electroosmosis method
作者简介
吴松华(1983-),男,安徽太湖人,硕士,高级工程师,主要从事水利与港航、市政及软基处理工程施工技术管理、科技研发和河口海岸动力方面的研究工作。E-mail:wusongh@163.com。
