山岳トンネル (9)

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[VI-1050] Study of Tunnel Excavation Work in Serpentinite Ground for Lane Widening(Two Lanes to Four Lanes)

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

Keywords:

Two Lanes to Four Lanes,Serpentinite,Study of Tunnel Excavation Work,Measuring engineer,Evacuation tunnel

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