Abstract：Testing study is made on dynamic mechanics parameters，including dynamic elastic modulus and dynamic damping ratio，of silty-clay and fine-sand which are sampled from the Qinghai-Tibet railway. Analysis is also performed on the relations among those parameters，frequencies，temperatures and water contents. The following test results are obtained. (1) Variation laws of dynamic mechanics parameters of frozen silty-clay and fine-sand are the same. (2) Dynamic elastic modulus of frozen soil will increase with increment of frequency or decrement of temperature. (3) While soil water content increases，dynamic elastic modulus of frozen soil will increase at first，and reach its maximum value when the soil are water-saturated. (4) Dynamic damping ratio of frozen soil decreases with increment of frequency or decrement of temperature. (5) Dynamic damping ratio increases slightly with increment of water content.
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2003, Vol. 22 
