This study aims to explore the possibility for estimating K0 in a level ground of granular soil by seismic methods on the basis of micromechanics theory. The idea was to simulate in situ cross-hole seismic method for the measurement of wave velocities along various directions of wave-propagation. This work made use of a field simulator to control a K0 condition (zero lateral strain condition) in specimens. A series of vertical loading containing subsequent loading and unloading were applied to the specimen prepared by pluviation. In general, the K0 values determined experimentally in this work agreed with the exiting empirical relations. K0 value was also calibrated from measured anisotropic wave velocities using an optimization procedure. From the comparison of the back-calculated and measured results of K0, it revealed the feasibility for the determination of the in situ lateral stress in granular soil by seismic methods and on the basis of micromechanics theory as long as enough wave-velocity measurements along various directions of wave-propagation were available. The potential for the usage of the presented methodology for the determination of the in situ lateral stress in level-ground of granular soil by seismic methods seems encouraging.
|Number of pages||25|
|Journal||International Journal for Numerical and Analytical Methods in Geomechanics|
|State||Published - 10 Dec 2004|
- Granular soil
- In situ lateral stress
- Wave velocities