摘要
为研究细粒尾矿的静态液化特性,基于内掺法配制不同细粒含量的尾矿试样,并通过固结不排水三轴试验,研究不同围压、不同细粒含量尾矿的静态液化特性。试验结果表明:有效固结围压越小,饱和尾矿的静态液化现象越明显,并且可以用不排水脆性指数、液化势指数和失稳势指数3个液化参数对尾矿的静态液化特性进行定量描述。随着细粒含量的增加,尾矿的3个液化参数均呈现出先增大后减小的趋势,并在细粒含量为30%时达到最大值,尾矿此时的静态液化潜势最大。最后基于修正状态参数将尾矿的静态液化特性进行分类,并通过其他种类尾矿试验结果和相关性检验对其进行分析,论证修正状态参数标准对尾矿的静态液化特性分类的合理性。
In order to study the static liquefaction characteristics of fine-grained tailings,the inner mixing method was used to prepare tailings with different fine-grained contents.The static liquefaction characteristics of tailings under different confining pressures and fine contents were studied by undrained consolidated triaxial tests.The test results show that the lower the effective consolidation confining pressure is,the more obvious the static liquefaction of saturated tailings will be.Meanwhile,three liquefaction parameters including undrained brittleness index,liquefaction potential index and instability potential index can be used to reflect the static liquefaction characteristics of tailings.With the increase of fine content,the three liquefaction parameters of tailings show a trend of first increasing and then decreasing,and reach the maximum value when the fine particle content is 30%,while tailings are most prone to static liquefaction at this time.Finally,the static liquefaction characteristics of tailings are classified by using modified state parameters.The rationality of classifying static liquefaction characteristics of tailings by modified state parameters is demonstrated by the test results of other tailings and correlation test analysis.
作者
胡再强
陈振鹏
张光昕
秦秋香
焦韩伟
吴朋
HU Zaiqiang;CHEN Zhenpeng;ZHANG Guangxin;QIN Qiuxiang;JIAO Hanwei;WU Peng(Institute of Geotechnical Engineering,Xi'an University of Technology,Xi'an,Shaanxi 710048,China;Ansteel Group Mining Design and Research Institute Co.,Ltd.,Anshan,Liaoning 114004,China;Beijing Branch,Shenzhen Water Planning and Design Institute Co.,Ltd.,Beijing 100071,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2022年第S01期3002-3009,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
陕西省自然科学基础项目(2017JM5059)
陕西省黄土力学与工程重点实验室项目(13JS073)
关键词
岩土工程
静态液化
细粒含量
液化参数
修正状态参数
geotechnical engineering
static liquefaction
fine content
liquefaction parameter
modified state parameters
