AUGER-CAST PILES
Auger-cast
piles, too identified as continuous flight auger piles (CFA), are deep
foundation elements that are cast-in-place, using a hollow stem auger with uninterrupted
flights. The auger is drilled into the earth and/or rock to design depth. The
auger is then gradually extracted, removing the drilled soil/rock as concrete
or grout is pumped all the way through the hollow stem. The grout pressure and
volume should be carefully controlled to construct a continuous pile exclusive
of defects. Reinforcing steel is next lowered into the wet concrete or grout.
The completed foundation element resists compressive, uplift and lateral loads.
The method has been used to carry buildings, tanks, towers and bridges.
No comments:
Post a Comment