弾性波速度の低減を考慮した合理的なトンネル設計について

抄録

Elastic wave exploration is very useful to evaluate the rock mass. So, the support design of the mountain tunnel is normally determined by the applicable standard support pattern to ground classification according mainly to the elastic wave exploration result. In fact, however, the rock mass come loose by constructing tunnel. So, we need to design the tunnel support in considering of that.
In this paper, we connected the loosening of the rock mass and decrease of elastic wave rate by investigating elastic wave rate around the tunnel as excavated and suggested the efficient tunnel support design method incorporated loosening of rock mass by use of decrease of elastic wave rate.