Abstract: The stability of the tailing slopes under highspeed train induced vibrations is directly related to the train operation safety. This paper presents a case history of the stability of a tailing slope in Fujian. The development of dynamic shear modulus ratio (G/Gmax) and the change of the dynamic damping ratio (λ) with the dynamic shear strain (γ) under different confining pressures are obtained through the characterization of the dynamic parameters of the tailing silt other tiling soil samples with the dynamic triaxial shear tests and resonant column tests. Based on the measured vibration and the acceleration characterization of the highspeed trains, the stability and liquefaction of the tailing slopes are evaluated. The results indicate that the stability is not a concern and the liquefaction und the vibration is not likely.

Key words: High-Speed Train, Dynamic Parameters, Liquefaction Properties, Dynamic Stability