Special underground construction
Large-diameter rotary drilling rigs
With our „Rotary Drilling Rig BG20H” and “BG24H” we are able to place 1,50 m thick
piles into the ground. According to the construction side and the respective underground
we work with the drilling cased boreholes which are technically more precise, or
with the more competitive uncased piles.
Furthermore we execute CFA-boreholes with long hollow stem augers and use special
drilling systems such as soil mixing wall systems, FOW piles and displacement piles.
We use bored pile walls as waterproof sheeting, as pit securing for areas with floodwater,
and also for launch and target pits in underground pipe drives and also for slope
and flotation control.
SONNTAG also offers a wide range of pile-drive work executed by own professionals
and machineries.
Anchor drilling rig
Due to the 360° blade angle with this machine we are able to execute
- GEWI-anchors
- Ischebeck-anchors
- blast hole drillings
under most difficult conditions.
SONNTAG also offers a wide range of pile-drive work executed by own professionals
and machineries. Already for years we have worked with different equipment and techniques
(please have a look at our spectrum „sheeting technology“).