Abstract: An experimental study on the deformation and filtration of saturated sands underimpact loading is carried out by examining the behavior of a saturated sand column dropping tothe ground. The longitudinal drainage pathways and horizontal cracks in the skeleton of saturatedsands are discovered. By means of analyzing the images, the phenomena (Occurring in sand sampleNo.1) can be summarized as follows: (1) Some horizontal cracks cross the full sections, generally, thenumber of these cracks is three. Some small ...