‘We first came across sonic in 2004; my father and my brother went to a demonstration in Canada. However we started drilling with sonic six months ago.'
The sonic rigs are smaller and lighter compared to conventional drilling rigs, with the same depth performance.
'We also use the SingleWall CoreBarrel on the site here. It is planned to build a deep excavation, next to a railway, for a three-level underground car park that is all part of a hospital. But we also use the AquaLock and DoubleWall CoreBarrel for softer formations or alluvial formations. We carry out CPTs as well with the rig.’
‘We are drilling glacial formations mainly in moraine clay with stones and boulders. This is one of our projects with higher demands on the soil sample quality, as the excavation pit and also the foundations are depending on that. We go down to 18 metres and if we need more information about the subsoil we advise going deeper. We drill nine boreholes to get an overview of the whole subsoil area.’
‘With sonic we get the better quality samples in a shorter time. And the rigs are smaller and lighter compared to conventional drilling rigs, with the same depth performance. Royal Eijkelkamp is a very good support for all our challenges.’
Ulrich Geotechnik is a German engineering office for geotechnics. Luis Ulrich is the Co Managing Director, studied civil engineering and geotechnics and manages all operational processes now. The company started with a well drilling company, founded by the grandfather of Luis. His father build up the engineering office in 1975 and integrated the well drilling company five years later, in 1980.
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