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Real Estate Management Strategy and Underpinning

Real Estate Management Strategy and Underpinning. Indications Timing Methods of underpinning. Need of underpinning. Existing foundations on wooden piles Settlements Potential risks of decayed wooden piles Cracking of superstructures. Economy of underpinning.

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Real Estate Management Strategy and Underpinning

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  1. Real Estate Management Strategy and Underpinning • Indications • Timing • Methods of underpinning IWM 2003 Seattle Jouko Lehtonen

  2. Need of underpinning • Existing foundations on wooden piles • Settlements • Potential risks of decayed wooden piles • Cracking of superstructures IWM 2003 Seattle Jouko Lehtonen

  3. Economy of underpinning • Earlier stage in renovation construction (i) => less settlements (ii) bigger collection of potential underpinning methods and less problems in superstructures => less costs • Later working => financing can be done later • Optimal date for underpinning? IWM 2003 Seattle Jouko Lehtonen

  4. Methods of underpinning in very soft soils • Jet grouting • Applicable only up to 10 m column length • Micropiling • Applicable to any pile length • Various pile types up to foundation conditions • Impact driven micropiles • Conventional driving against the pile head • Side Grip Piling • Jacked micropiles • Conventional pushing against the pile head • Side Grip Installation • Drilled micropiles • DTH • Top Hammer Installation • Conventional driving against the pile head • Side Grip Installation? IWM 2003 Seattle Jouko Lehtonen

  5. Micropiling method has impact to the building and use of it • Settlements during construction • Noise • Timing • Some methods are available only in the earlier stages of the potential underpinning time IWM 2003 Seattle Jouko Lehtonen

  6. Decision to underpin • Today: no policy to follow => decisions made by chance or by accident • Tomorrow? • Tools for strategic planning • Collection of underpinning methods => decisions will be made based on good understanding on the problems and challenges => less costs, less damages in superstructures => more business to the micropile industry => win-win IWM 2003 Seattle Jouko Lehtonen

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