摘要
利用动扭剪三轴仪对压实黄土进行了不同振动频率下的试验研究,分析了振动频率f对压实黄土的动强度和动强度参数的影响规律。研究表明,在一定围压下,压实黄土动强度均随振动频率f的升高而增大,与振动频率呈正相关关系;在试样振动频率确定的情况下,压实黄土的动强度随围压的增加而增大;压实黄土的动黏聚力cd和动内摩擦角φd均随着频率的增大而升高;动强度参数中cd和φd随振次的增加均呈减小并最终趋于稳定的趋势。
Shear failure of compacted loess in different frequencies is studied using a torsion shear apparatus and the effects of frequency on dynamic strength and dynamic strength parameter are investigated. （1） At a certain defined confining pressure, dynamic strength of compacted loess is increased with the rise of the frequency, showing a posi- tive relation with frequency. （2） At a certain defined frequency, dynamic strength of compacted loess is increased with the rise of confining pressure. （3） Both dynamic cohesion and internal fraction angle of compacted loess are in- creased with the rise of frequency. （4） The dynamic cohesion and the internal fraction angle are decreased and tend to be steady with the increased vibration.
出处
《水土保持通报》
CSCD
北大核心
2009年第4期130-133,共4页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金资助项目(50578134)
教育部新世纪优秀人才支持计划(NECT-06-0864)
关键词
压实黄土
振动频率
动强度
动强度参数
compacted loess
frequency of vibration
dynamic strength
dynamic strength parameter
