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Class 6 - Cut and Cover Tunnels - Part 2
  • Timber vs. concrete decking.
  • Video excerpts from the Discovery Channel.
  • Rock blasting – blast mats.
  • Mixed face tunnel.
  • Defining terms and procedures. Mud slab, sand wall.
  • Waterproofing.
  • Underpinning existing subway structures with drilled piles.
  • Single face forms for sand wall.
  • Constructing the tunnel structure.
  • Restoring existing utilities and backfilling new tunnel.

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