Abstract

The results of ultrasonic measurements using P- and S-waves on a sample of a fully water-saturated medium-grained sand in a temperature range from –20 to +20°C, viz., the dependences of kinematic and dynamic parameters of an ultrasonic signal on temperature, as well as on the elastic wave attenuation, are presented. The proposed method made it possible to calculate P- and S-wave attenuation on the ultrasonic frequencies for a wide temperature range. The value of the attenuation in the range of negative and positive temperature values differs by a factor of 40–50 for P-waves and by two orders of magnitude for S-waves. A smooth change in the attenuation from –5°C (–10°C) to 0°C was observed for P- (S-) waves. The attenuation that affects the dynamic parameters reacts faster to thawing of frozen ground than the velocity, which is more relevant in the case of plastic frozen rocks and at a temperature close to 0°C.

中文翻译：

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在–20至+ 20°C温度范围内水饱和砂的声学特性的实验研究结果

摘要

使用P波和S波对温度为–20至+ 20°C的全水饱和中粒砂样品进行超声测量的结果，即，运动学参数和动力学参数的依赖性介绍了超声波信号在温度以及弹性波衰减方面的作用。所提出的方法使得有可能在较宽的温度范围内计算超声波频率上的P和S波衰减。在负温度值和正温度值范围内的衰减值，对于P波，相差40–50倍，对于S波，相差两个数量级。对于P，观察到从–5°C（–10°C）到0°C的衰减平滑变化。-（S-）波。影响动态参数的衰减对冻结地面融化的反应比速度更快，这对于塑性冻结岩石和温度接近0°C的情况更为重要。