Physical properties of frozen soils measured using ultrasonic techniques

The velocity of ultrasonic waves traveling in a media reflects the dynamic properties of that media, which should depend on the physical properties. Taking advantage of the easy-operation and non-destructive nature of the ultrasonic technology, it is possible to determine some physical properties of frozen soils indirectly by using this technique, either in the laboratory or in the field. A series of experiments were carried out to obtain dynamic properties of frozen soils and to establish relationships between ultrasonic velocities and unfrozen water contents, as well as the strength of frozen soil. Experimental results have indicated that the strength of frozen soil can be estimated as a function of a single factor by measuring the ultrasonic velocities. Additionally, ultrasonic velocities can be used to predict the unfrozen water content of frozen soil for different temperatures. Permafrost, Phillips, Springman & Arenson (eds) © 2003 Swets & Zeitlinger, Lisse, ISBN 90 5809 582 7