硬化粗质地基冻土层的速度参数与卓越周期的关系

本文给出了对共振现象出现概率的理论分析与实验数据间关系的思考。样品取自位于半空间的硬化粗质冻土地基,包括石质冻层。参考从三个场地14次地震记录的纵、横波速求得的土层相对频率特征,进行了对其共振频率的评估。纵、横波速在前贝加尔和后贝加尔地区的粗质冻土层中随湿度和温度而变化。将这些概括化的速度值与一个共振频率和纵、横波度之间的关系式结合起来,用于评估被调查土层的纵、横波速的概率值。结果显示,通过综合在实验室尺度获得的速度值和现场测量获得的速度值的数据,则利用地震记录波来确定在松散土层内传播速度的概率值是可能的。

Relationship between the Velocity Parameters and Dominating Periods for the Stiffly Frozen Coarse Ground Layer

Consideration is being given to the correlation between theoretical concepts of the probability of occurrence of resonance phenomena and experimental data by the example of stiffly frozen coarse ground layer lying on the half-space that is also composed of frozen rocky grounds. An assessment of resonance frequencies is made in reference to relative frequency characteristics of the layer obtained for longitudinal and transverse waves from 14 earthquakes recorded in three sites. The velocities of the longitudinal and transverse waves vary in the frozen coarse grounds of Pribaikalye and Trans-Baikal area with regard to humidity and temperature. The generalized values of these velocities in combination with an equality of relationships between the resonance frequencies and velocities of longitudinal and transverse waves are used in the assessment of the probability values of velocities of lingitudinal and transverse waves alone in the investigated layer. It shows a possibility to determine the probability values of velocities of the wave propagation in a loose ground layer from the earthquake records with the availability of generalized data on the values of velocities alone obtained on the laboratory scale and through full-scale measurements.