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    HomeTechniquesPilesLarge diameter bored pilesLarge diameter bored pile under support fluid

    Large diameter bored pile under support fluid

    The large diameter bored pile under thixotropic fluid is a cast-in-place circular cross-section concrete pile. For the construction of this non-displacement pile a borehole is made using purpose designed drill tools, with removal of soil. Where boreholes are required to penetrate considerable depths of unstable soil a support fluid, e.g. bentonite mud or polymer and a temporary recoverable top casing assist in stabilizing the bore and allow the perfect insertion of heavily reinforcement steel cages.

    Construction sequence

    Installation process in accordance with the requirements of standard  NBN EN1536:1999

    Fields of application

    • Executed as single pile, contiguous (tangent) or - less often - secant pile wall

    • Suitable for high point loads, important horizontal loads and bending moments

    • Bearing or embedment in firm strata or hard rock possible

    • Obstacle drilling (when other techniques cannot be implemented)

    • Important installation depths (up to > 50 m)

    • Create piles with a cut-off level beneath the working platform level possible  ("contrebas")

    • Infrastructure works, important industrial projects, large buildings.

    Environmental impact

    • Vibration-free

    • Pile with soil extraction: removal of spoil from the job site is required

    • Provision should be made to handle the thixotropic fluid

    • A stable, dry and flat work platform is required.

    Technical specifications