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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]
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Vertical aperture building
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Installation of ground plant and pipes
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Installation of entrance and reaction wall
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Equipment Setting
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Early drilling
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Main drilling
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Main drilling
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Main drilling (blast tube input)
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Main drilling (installation of medium pressure pipe)
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Main drilling (using blast tube)
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Main drilling (tunnel measurement)
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Arrival drilling