地中構造物③

[25-9-2-03] Study of Tunnel Excavation Work in Serpentinite Ground for Lane Widening (The Doto Expressway Two Lanes to Four Lanes)

*SEGA TATSUO¹, Minori Yamada¹, Kazuyuki Murakami¹ (1. East Nippon Expressway Company Limited)

Keywords:mountain tunnel, full face excavation method , serpentinite