Execution 6 meter lengths are drilled with steel core piles of the same size 168.3x4.5mm and 193.7x5mm, where many of these are inclined piles. The steel cores ø90 and ø120mm are respectively placed in these casings. The other half of the total quantities are RD piles of the dimension RD140, RD170 and RD220/10mm. Also here are some of these oblique points. The drilling system used here is the Robit Prime Drill thrue, as it has been under-drilled for footings for tension piles. The advantage of this the system is that you can easily disengage from the ring shoe to drill further down into the mountains without having to change to the mountain crown. A mini rig with 1.0 meter RD pipe has also been used inside the building where the ceiling height and weight restrictions make this impossible with a normal one 6-meter drilling rig.
Referansekontakt:
Backe Østfold AS – Kenneth Torstein Larsen
Kennethtorstein.Larsen@backe.no
