山岳トンネル (8)

2:20 PM - 2:30 PM JST(5:20 AM - 5:30 AM UTC)

[VI-1041] Construction of large-section NATM tunnels in low-speed zones and directly under national highways

*Naoto Hiromatsu¹, Masamitsu Takagi¹, Tooru Itakura¹, Fumiharu Sou¹, Shinichi Chiku¹, Hiroyuki Takahashi¹ (1. ASUNARO AOKI CONSTRUCTION)

Keywords:

low speed zone,Drilling logging,extra bolt,AGF,Small soil cover

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