山岳トンネル(9)

[VI-656] Characteristics of Seismic Wave Velocity in Tunnel Excavation Blasting

〇Kazuhiro Onuma¹, Masashi Nakeya¹ (1.Hazama Ando Corporation)

Keywords:Tunnel, Seismic survey refraction method, In-site Seismic Survey, Seismic Wave Velocity, Overburden

In this study, we examined the seismic wave velocities measured by seismic survey refraction method conducted from the ground surface and the elastic wave velocities in the tunnel measured by TFT survey, focusing on the overburden in the measurement section, and performing tunnel excavation blasting. We report the points to consider when using the measurement results of underground seismic wave survey used for selecting tunnel support patterns.