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Introduction to Micropile Activities in Nordic Countries

Jouko Lehtonen. Introduction to Micropile Activities in Nordic Countries. Micropile activities in Nordic Countries. Several research projects DATU, Turku Polytechnic Pyramit, HUT&TUT TUT laboratory tests Growth of business significant in Sweden, Norway and Finland

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Introduction to Micropile Activities in Nordic Countries

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  1. Jouko Lehtonen Introduction to Micropile Activities in Nordic Countries IWM 2004 Jouko Lehtonen

  2. Micropile activities in Nordic Countries • Several research projects • DATU, Turku Polytechnic • Pyramit, HUT&TUT • TUT laboratory tests • Growth of business significant in Sweden, Norway and Finland • Sustainable growth in traditional appications • Rapid growth in new applications • New applications • New steel grade IWM 2004 Jouko Lehtonen

  3. IWM 2004 Jouko Lehtonen

  4. New applications of micropiles: • steel foundations of detached houses • steel foundations of wind power stations towers • very shallow pilings • Very shallow pilings: • complementing impact driven piles < 4 m • complementing shallow foundation; no excavation IWM 2004 Jouko Lehtonen

  5. IWM 2004 Jouko Lehtonen

  6. New steel grade • RD piles • S550 • D140…220 • s8…12,5 IWM 2004 Jouko Lehtonen

  7. Micropiles in the windmill towers • Substitutive structure when gravity foundations normally in use • Savings in excavations and volumes of concrete • Micropiles as • Passive anchors / tension piles • Compression piles • Case: Raahe wind farm • RD220-12,5 S550 IWM 2004 Jouko Lehtonen

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