Shear wave velocity in saturated sand under different stress paths

抄録

Currently, shear wave measurement is an effective method for assessing the strength of foundation soils and is widely used in field engineering and laboratory tests. Bender element test has been widely placed as an indoor shear wave testing device to measure strength parameters such as shear modulus. However, the propagation characteristics of shear waves in a medium highly depend on the stress state of the medium itself and its changes. As the propagation medium of shear waves, the effective stress state and the skeleton structure of soil are inevitably affected when subjected to loading history. Therefore, in order to investigate the propagation characteristics of shear waves under multiple loading disturbance in the previous period, a series of indoor dynamic triaxial tests and bender element tests were carried out using Toyoura sand, and different stress paths were applied to the sand to investigate the propagation behavior of shear waves under the action of different dynamic loading stress paths and isotropic stress conditions.