Abstract
Under various geological condition, many in-situ tests for predicting ahead of the tunnel face were carried out using TSP (Tunnel Seismic Prediction) system; the products of the Amberg Measuring Technique Ltd in Switzerland.
The TSP system has been succesfully utilized for predicting ahead of the tunnel face in Europe. We have been verifing the applicability of the system to the complicated geological situation in Japan. In any case, the predicted condition was very much in agreement with the rock mass actually exposed by the excavation. As a result, these in-situ tests have revealed that TSP system was very useful for Japanese tunnels.
