Analysis on the Anti Vibration and Liquefaction Properties of Silt Sands

In order to research the anti-liquefaction strength of the silt sands in subgrade engineering under the condition of vibration force, the soil samples of silt sands were used to do the dynamic triaxial test under different conditions using the bi-directional electromagnetic vibration triaxial apparatus. After that the influence of the anti-liquefaction strength caused by the dry density and fine particle content was analyzed. The results indicate that the larger dry density is, the stronger the property of anti-liquefaction will be; the anti-liquefaction strength won't increase with the increase of fine particle content, but will decrease to a nearly minimum value when the fine particle content is 40%. Analyze the increasing law of pore water pressure and deformation when the saturated silt sands are liquefied by the classical mathematical model, which resolves the characteristics of vibratory liquefaction of silt sands subgrade.