Proceedings - 13th International Workshop on Micropiles - 2017, Vancouver, BC, Canada, (ISM, DFI, ADSC)
A POST-TENSIONED MICROPILE FOUNDATION SYSTEM WITH GROUTABLE VOID FORMS (GVF)
Horst Aschenbroich, Dipl. Ing.
This is a foundation solution for renewable energy sources such as wind turbine towers, solar collector panels, hydropower and towers for transmission lines. In all cases the focus is to provide the most cost effective, safe, and environmentally friendly solution. For that reason, micropile solutions can be considered as an alternative to mass concrete foundations. Micropile foundation systems are constructible in different ground conditions without the need for changing the equipment or the method of installation. It is particularly desirable to have a deep foundation with a smaller footprint for wind turbine towers. To resist the imposed overturning moments, the concept of using posttensioned micropiles (PTMP) in compression and/or tension with groutable void forms (GVFs), relies on the activation of the soil mass under the foundation (Figure 1). This allows for reducing the size and depth of the now pre-tested foundation, which results in savings in reinforcing steel and concrete.
|article #2628; publication #1033 (ISM- 2017)|