Secant and Tangent Walls

Secant pile walls are formed by installing a series intersecting reinforced concrete piles. First, primary shafts are drilled on a template with space in between them and left unreinforced. Secondary piles are constructed in the space between primary piles such that they intersect both surrounding primary piles. Secondary piles are reinforced with steel rebar cages or beams.

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Tangent pile walls are constructed such that there is no overlap between piles. The piles are installed either flush to the adjacent pile or with a very small clear space between piles. Typically all piles in a tangent wall are reinforced with steel cages or beams. Walls may be tied-back for increased lateral resistance, Both secant and tangent walls offer much stiffer lateral response than sheet piles or solider pile and lagging walls.

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Tangent pile walls are constructed such that there is no overlap between piles. The piles are installed either flush to the adjacent pile or with a very small clear space between piles

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