Friction Angle on Pile Skin
Reference values of friction angle between the pile skin material and the surrounding non-cohesive soil are listed in the following table:
Friction angle on pile δ [˚]
Pile material | δ [˚] |
Steel piles | 20 |
Timber piles | 0.75φ |
Steel reinforced concrete piles | 0.75φ |
where: | φ | - | angle of internal friction of the soil |
Literature:
NAVFAC DM 7.2, Foundation and Earth Structures, U.S. Department of the Navy, 1984.