shaft.fs_coyle_castello()

Unit shaft resistance of a driven pile in sand.

Usage

Source

shaft.fs_coyle_castello(
    sigma_v0,
    phi,
    z,
    width,
    delta_ratio=0.8,
)

Parameters

sigma_v0: array_like

Vertical effective stress, ksf.

phi: array_like

Friction angle, deg.

z: array_like

Depth below the ground surface, ft.

width: float

Pile width, ft.

delta_ratio: float = 0.8

Interface friction angle divided by phi.

Returns

ndarray

sigma'v0 K_t(phi) 10**(-0.017 z / B) tan(delta_ratio phi), ksf.

References

Coyle and Castello (1981).