摘要
以福州地区花岗岩残积砾质粘性土为试验研究土料,与粉煤灰进行不同比例的混合,形成以粉煤灰改良的花岗岩残积土,采用击实、直剪、渗透和湿化试验,研究粉煤灰改良花岗岩残积土的工程特性,得到养护时间和粉煤灰掺量的不同对花岗岩残积土抗剪强度、渗透性和水稳定性的影响规律.研究表明,掺入粉煤灰可有效提高花岗岩残积土的抗剪强度,降低其渗透系数和崩解率,且龄期越长越明显.
The granite residual soil in Fuzhou was selected as the soil sample in order to gain its engineering characteristics by means of mixing it with different quantities of fly ash,which were studied via compaction tests,direct shear test,seepage test as well as wetting test,and the influent trends of the mixed quantities of fly ash and curing time on shear strength,permeability and water stability characteristics of granite residual soil were obtained. The results show that the fly ash content can effectively improve the shear strength of granite residual soil,reduce its permeability coefficient and disintegration rate,moreover,the trends become more pronounced as the mixed time goes on.
作者
刘胜
陈志波
陈伟文
韦毅
LIU Sheng;CHEN Zhibo;CHEN Weiwen;WEI Yi(Key Laboratory of Geohazard Prevention of Hilly Mountains,Ministry of Land and Resources,College of Environment and Resources,Fuzhou University,Fujian Provincial Universities Engineering Research Centerof Geological Engineering,Fuzhou,Fujian 350116,China)
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2018年第5期712-717,共6页
Journal of Fuzhou University(Natural Science Edition)
基金
国土资源部丘陵山地地质灾害防治重点实验室开放基金资助项目(ZY-2017-16)
福建省自然科学基金资助项目(2017J01481)
河海大学岩土力学与堤坝工程教育部重点实验室开放基金资助项目(2016003)
关键词
花岗岩残积土
粉煤灰
土体改良
抗剪强度
渗透性
水稳定性
granite residual soil
fly ash
soil conditioning
shear strength permeability
water stability
