Abstract
This paper presents a back analysis method for determining the complete three-dimensional initial state of stress and elastic constants of the ground, from a set of displacements measured during excavation of underground openings.
The method proposed here is formulated by the boundary element method, so that it can easily be applicable to three-dimensional problems, considering the sequence of steps for excavation, and the period for installation of measuring instruments in the back analysis.
In order to verify the applicability of the proposed method, computer simulations are carried out and the numerical stability of the method is demonstrated. The effects of scattering measurement data are also discussed in relation to the accuracy of the results.
