飛騨トンネル本坑ＴＢＭにおけるカッタの摩耗と破損

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タイトル別名
  • Disc-Cutter Wear and Failure of TBM at Hida Tunnel
  • ヒダ トンネル ホンコウ TBM ニ オケル カッタ ノ マモウ ト ハソン

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The Hida Tunnel for Tokai-Hokuriku Highway was excavated by a world-largest-class TBM with the diameter of 12.84 m. The TBM have bored over 4.3 km of the tunnel through Nouhi Rhyolite, Granite Porphyry and Hida Gneiss. The uniaxial compressive strength of these rocks was found to be extremely high. Such high strength resulted in significantly not only high wear rate of the disc cutters but also failure of those mounted on the TBM.<BR>In this study, cutter wear and failure were carefully measured and recorded together with the operation conditions such as thrust force, penetration rate, cutter-head rotation rate and rock strength.<BR>It was found that the extent of cutter wear largely depends on position of the disc cutter; cutter wear per unit tunnel length near the fringe of cutter head was extremely larger than that near the center of cutter head. The number of cutter replacements was found to show a good correlation with the cumulative cutter wear. It was found that the interval distribution of cutter replacements follows the exponential distribution and the number of cutter replacements follows the Poisson distribution.

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  • 資源と素材

    資源と素材 126 (7), 425-431, 2010

    一般社団法人 資源・素材学会

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