试验研究层间错动带动孔压增长的影响因素  

Experimental Study of the Influences of Dynamic Pore Pressure Increase of the Bedding Fault

作　　者：朱凌[1] 裴向军[1] 崔圣华 孟祥瑞[1] 

机构地区：[1]地质灾害防治与地质环境保护国家重点实验室(成都理工大学),成都610059

出　　处：《科学技术与工程》2017年第22期177-181,共5页Science Technology and Engineering

基　　金：国家自然科学基金(41572302)资助

摘　　要：对大光包滑坡层间错动带材料进行动三轴试验,研究在不同条件下动孔压的增长特性,试验结果表明:(1)频率对动孔压的增长没有影响,不同频率下试样达到液化的时间基本相同;(2)动应力越大,孔压增长越快,达到液化需要的振次越少;(3)饱和度对动孔压的增长有较大影响,饱和度越高,样品动孔压增长越快,达到液化需要的振次越少;饱和度降低,动孔压的增速减缓,在应变达到5%时样品没有液化;(4)干密度越小,动孔压增长越快;干密度越大,颗粒之间的咬合力和摩阻力越大,孔压增长缓慢。In this paper,based on the triaxial test which is the bedding fault material in the Daguangbao landslide to research the growth characteristics of dynamic pore pressure under different conditions,the experimental results showed that：（1） Frequency has no effect on the growth of dynamic pore pressure,the time of sample liquefaction is the same under different frequency;（2） The pore pressure increase faster with the greater the dynamic stress,and the less the vibration times required for liquefaction;（3） Saturation has a great influence on the growth of the pore pressure,the faster dynamic pore pressure increase and the less vibration times required for liquefaction while sample has the higher the degree of saturation,with the reduce of saturation,the dynamic pore pressure of the growth is slowing and sample no liquefaction in the strain of 5%;（4） The faster dynamic pore pressure increase in the small of dry density,the pore pressure increase slowly for the greater the bite force and frictional resistance between particles when the dry density is the greater.

关 键 词：层间错动带 动三轴试验 动孔压 

分 类 号：P642.22[天文地球—工程地质学]