A Study for improvement of the credibility of evaluation method for the long-term dynamical behavior of near-field rock mass

Hiramoto, Masayuki; Kobayashi, Yasushi; Aoyagi, Shigeo*; Miyanomae, Shunichi*; Morita, Atsushi*

For the study on the long-term stability of near-field rock mass, the following studies were carried out in this report. (1) Inspection of applicability of a valuable-compliance-type constitutive equation that used the measurement data of the existing tunnel. (2) Suggestion of the informatization construction that used a valuable-compliance-type constitutive equation (1) FEM model was developed to estimate the time dependet behavior of rock mass surrounding tunnel. The calculated results such as tunnel convergence and the axial force exerted on tunnel support were compared with the measured results in-situ. It was found that the calculated results reasonably well coincided with the measured results. (2) The informatization construction that used a valuable-compliance-type constitutive equation was suggested. This method will be used for disposal ground construction. It will be led to improving reliability of long-term evaluation after closedown.