地震探査によるトンネルのゆるみ測定について

抄録

This paper deals with experi mental method for estimating the rock pressure in pilot tunnels by seismic prospecting.
By the seismic prospecting, the author measures the distribution of P Wave velocities in pilot tunnels and estimates the rock pressure from the degree of the decreace of P Wave Velocities in the rock and geological conditions.
Still more, he estimates the rock pressure in tunnels by the experimental method of K Terzaghi.