Grouted piles secure base for 60m mast
A 60m wind monitoring mast was recently erected at Ferrybridge, Doncaster, by specialist tower erection company, FLI Structures. To ensure that the mast was secured at its base, Albion Drilling undertook the installation of 22m long grouted piles to which main contractor FLI could then bolt its steel interface frame.
Site investigation had indicated soft made ground, overlying a hard layer. This meant that a traditional concrete raft solution would not be practical and FLI’s own all steel helical piles would not penetrate the hard layer sufficiently to achieve the required tension capacity. A compromise solution was designed combining the steel frame with compatible Ischebeck piles.
Using a geotechnical crawler rig, Albion Drilling installed 6 No. 22m x 150mm Ischebeck Titan grouted piles. The piles were drilled, at an angle, into the hard ground in a circular formation to provide sufficient resistance to all tension loadings. With the steel base levelled and secured to the piles the mast was erected and the whole operation was successfully completed in only 12 days on site.
Technical
- 22m x 150mm Ischebeck Titan grouted piles
- Angled installation using geotechnical crawler rig
