Abstract:In order to study the impact of sample disturbance on shear-wave velocity,a comparative survey was carried out both in situ and in laboratory. The results show that variation levels of shear-velocity differ according to the property of soil. For cohesive soil,the differences between the two sets of results are generally less than 11 percent with the utmost value about 13 percent. For sandy soil,the indoor shear-wave velocity is smaller than that of the in-situ test and the differences are generally under 14 percent with the utmost value of 20 percent. Such conclusion offers an objective reference to estimate the in-situ shear wave velocity through indoor test. In the same time,the differences between the two sets of results provide useful reference parameters to evaluate the disturbance level during sampling.