Abstract: According to theoretical relationship on the elastic constants with elastic wave speed,and the empirical relationship of strength with wave velocity,shear wave velocity is determined for the hole wall,in which core is sampled in the soil cement mixing pile and high pressure rotary jet pile center. By comparison of velocity of pile and ones of soil around the pile,as well as the integrity of the core samples, the size of strength and water permeability changes for pile were determined.Nine cement pile and a jet grouting pile of drill core,hole wall shear wave velocity of comparative study,the results showed that wave velocity did not increase.Then the intensity will not be increased,sealing effect will not be improved;Otherwise,wave velocity to improve more and more.The intensity increased the more obvious,The sealing effect may be significantly improved.That is possible to provide the experimental basis for the low-strain non-destructive testing of pile strength and water permeability.