Overlapping (secant) piles or adjacent (contiguous) piles are installed to form structural or cutoff walls. From soil mixing to drilled shafts, Keller draws on its complete suite of techniques to optimise the design and construction of these walls.

Common Uses

  • Support of excavations
  • Provide slope stabilisation
  • Create barriers to groundwater flow

Technical Details

The columns are constructed using CFA piles, bored piles, soil mixing, or jet grouting methods. Sequenced construction of the elements helps ensure a tight seal for water cut off. Casting can be used to increase confidence in pile verticality and interlock for deeper walls profiles. Casting can be used with both CFA (Cased Secant Piles), or bored piles (segmental casing). The design can incorporate steel bar or beams for reinforcement. Anchors provide additional lateral support, if needed. Secant or contiguous pile walls can be constructed in a wide variety of soil conditions.