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TBM tunnel

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Semi-Shield method

Semi-Shield Construction Order

Semi-Shield construction photo

[Construction photo: Seocho branch electric power field field]

  • Vertical aperture building

  • Installation of ground plant and pipes

  • Installation of entrance and reaction wall

  • Equipment Setting

  • Early drilling

  • Main drilling

  • Main drilling

  • Main drilling (blast tube input)

  • Main drilling (installation of medium pressure pipe)

  • Main drilling (using blast tube)

  • Main drilling (tunnel measurement)

  • Arrival drilling