Abstract
In this paper, we discuss a back-analysis method for determining the two-dimensional in-plane initial state of stresses and elastic constants of the ground, from a set of displacements measured during progressive excavations of underground tunnel.
The proposed method of solutions bases on the exact elastic theory by using of complex variable method with a conformal mapping transformation, which can be treated for an arbitrary shape of the tunnel.
The results of stresses, strains and displacements at arbitrary locations in rock ground are exactly computed by the given values of in-plane load, elastic constants and shape of the tunnel.
In order to verify the practical availavilities of this back-analysis, several numerical results are given in relation to the accuracy of the results.
