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CHAPTER 9 PRELIMINARY DESIGN OF TUNNEL - JICA

Excava- tion . Length . method (m) Spacing Construc- tion rangePer Thickness (cm) Upper half sizeLongitu Lower half size Arch & wall Invert . iph-eral (m) -dinal (m) B B-a 2.0 3.0 1.5 2.0 Upper half 120 5 - - 30 0 0 Full face with micro bench or top heading cut C I C I-a 1.5 3.0 1.5 1.5 Upper half 10 - - 30 (40) 0 ...

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  Tunnel, Excava

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Transcription of CHAPTER 9 PRELIMINARY DESIGN OF TUNNEL - JICA

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