摘要
用ＳＹＣ－２型声波探测仪，对取自淮南矿区井下冻粘土、冻砂土进行了测定。其声波纵横波速振幅衰减系数及动弹模与冻土温度、含水量、容重的关系均可用幂指数形式较好地描述。其中容重对波速、动弹模及振幅衰减的影响最大；其次为温度、含水量；冻土振幅衰减系数对其物理参数变化的敏感性大于波速。另外还研究了冻粘土与冻砂土声波特性差异。
In this article, the relation among longitudinal wave velocity, transversal one,cofficient of amplitude decay, the dynamic elestic modulus and temperature, the water content, the unit weight of frozen sand and clay are presented, according to a determination using SYC-2 rock acoustic detection device. The relations can be well described as exponent sign formulas, among them, the effects of unit weight on velocity, amplitude decay and dynamic elestic modulus are greatest. Then, it is temperature and water content by turns. The attenuation coeffisent of amplitude is more sensitive than longitudinal wave velocity to variation of physical properties of frozen soil. The difference between forzen sand and caly, and the acoustic wave properties of frozen soil varying with load and loading duration is studied, too.
出处
《冰川冻土》
CSCD
北大核心
1997年第2期149-153,共5页
Journal of Glaciology and Geocryology
关键词
冻土
声波波速
振幅衰减系数
动弹模
人工冻土
frozen soil, acoustic wave velocity, attenuation coefficent of amplitude, dynamic elestic modulus
