Abstract
After completion of a tunnel, constructed in soft rock, some deformations and cracks were observed on the lining. This situation was dealt with experimental judgment based on similar situations in the past. In view of recent tunnel repairing, the authors proceeded with investigating the quantification of prediction and reinforcement to repair the tunnel based on monitoring the deformation progress. In this paper, long-term measured tunnel deformations were simulated by ground strength reduction model. In addition, in order to evaluate the effects of various countermeasures for deformation, the proposed model is studied to examine their applicability to actual countermeasures and remaining issues. And, the characteristic of ground strength reduction is analyzed through the analysis of the deformed tunnel, and prediction method of deformation is proposed.
