トンネル(3)

[III-21] Case study on geological survey ahead of excavation face in mountain tunnel with high overburden

〇Yomei Terao¹, Takeshi Sato¹, Masahito Yamagami² (1.Central Japan Railway Company, 2.TAISEI CORPORATION)

Keywords:high overburden, survey ahead of face, tunnel seismic probe drilling, T-SPD, Ultra-long controlled boring, energy of drilling