PDF(344 KB)
Analysis of Construction Technology of Tunnel Portal in Unfavourable Geological Section
PENG Wei,LIU Jin-hua
Journal of Railway Engineering Society ›› 2007, Vol. 24 ›› Issue (8) : 66-70.
PDF(344 KB)
PDF(344 KB)
Analysis of Construction Technology of Tunnel Portal in Unfavourable Geological Section
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