Currently, over half of China’s trunk railways are located in permafrost regions. But to tackle the railway subgrade disease has always been the difficulty in the railway construction there. The influence that the dynamics performance of frozen silty clay has on permafrost subgrade is an important component in the researches towards permafrost subgrade. In this paper, the dynamics performance o...

A series of triaxial repetitive impact tests were conducted on a 50-mm-diameter split Hopkinson pressure bar testing device to reveal the characteristics dynamic stress–strain sandstone under confining pressure, and in this study was set as 5 10 MPa. The results showed that is very sensitive strain rate. As rate increases, strength, critical absorbed energy also however with increases number im...