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Recent content by Mickeycc

  1. Mickeycc

    What is closed-face tunnelling

    Q1) What is a closed-face tunnelling? So far I know open-face tunnelling is the tunnel face of the ground being excavated will stand up with no support for a short period of time. There is few common method to tunnel that i know: 1) TBM (Tunnel boring machine) 2) NATM (New Austrian Tunnelling...
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