摘要
通过室内模型试验,探究在干湿循环作用下泥岩颗粒料的崩解规律。利用基础熵量化泥岩颗粒料在干湿循环作用下的破碎程度,分析了土体级配随干湿循环的变化规律;引入破碎势的概念量化上覆荷载、粗颗粒含量等对泥岩颗粒料崩解破碎的影响。研究结果表明:崩解过程主要集中在前4次干湿循环中,其中2~4次的干湿循环作用下的颗粒崩解破碎最为剧烈,在经历9次干湿循环之后,泥岩试样由连续级配变为非连续级配;破碎势可以较好的量化分析上覆荷栽、粗颗粒含量在干湿循环前后泥岩颗粒料所具有的崩解破碎的概率,总破碎率可以量化描述从具有破碎的概率到发生破碎的这一类泥岩颗粒料占比情况。
Thedisintegration of mudstone particlesunder the action of dry and wet cycling was studied through laboratory tests.The basic entropy was used to quantify the fragmentation degree of mudstone particles under the action of dry and wet cycling,and the variation of soil gradation duringdry and wet cycling was analyzed.The concept of crushing potential was introduced to quantify the impact of the overburden and the content of coarse particles on the disintegration and breakage of mudstone particles.The results show that :the disintegration process mainly concentrates in the first four cycles,in which the particle disintegration and breakage are the most severe under 2--4cycles of drying and wetting.After 9cycles of drying and wetting,the mudstone samples change from continuous gradation to non--continuous gradation.Crushing potential could be used to quantify the probability of disintegration and breakage of mudstone particles before and after dry--wet cycling.Total breakage rate could quantitatively describe the proportion ofthe possible breakage particles to the broken particles.
作者
梁越
孙志伟
袁野
林加定
陈鹏飞
LIANG Yue;SUN Zhiwei;YUAN Ye;LIN Jiading;CHEN Pengfei(National Engineering Research Center for Inland Water way Regulation,Chongqing Jiaotong University, Chongqing 400074,China;School of River and Ocean Engineering,Chongqing Jiaotong University, Chongqing 400074,China;Land Resource Bureau of Lianyungang City,Lianyungang 222002,China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2018年第6期911-917,共7页
Journal of Disaster Prevention and Mitigation Engineering
基金
重庆市基础研究与前沿探索专项项目(cstc2018jcyjAX0559)
自然资源部中国地质调查局公益性项目(DD20160291)资助
关键词
干湿循环
泥岩
破碎势
基础熵
wetanddrycycling
mudstone
crushingpotential
basicentropy
作者简介
梁越(1985-),男,教授,博士。主要从事地下含水层层析扫描、渗透破坏数学模型及数值模拟方法研究。Email:liangyue2560@163.com.
