Secant Pile Wall at a Metro Station

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David Moloney

Underground Metro Station constructed using Secant Piles. A secant pile wall is constructed using intersecting cast in-situ bored piles. Soft Piles do not have reinforcement, are constructed firstly alternatingly. Hard piles that have reinforcement are constructed between and are cut into the soft piles. The secant pile wall forms an underground retaining wall that will support the faces of excavation and hold back the ground water.

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