The behavior of cast-in-drilled-hole pile has been investigated in detail with an instrumented
model test pile embedded in either level or sloping ground of sand or silty clay soil. Upslope
and downslope as well as parallel directional lateral loads were applied to the model test
pile to measure the lateral resistance and the load-deflection relationship. Parameters such
as the embedment length, the slope of the ground, the distance from the edge of the slope,
and the cyclic loading were included in the study. A large number of subsurface structures …

This paper summarizes the results of an analytical study of laterally loaded cast-in-drilled-
hole (CIDH) piles, which are typically used as the foundations for signposts and sound
barrier walls along urban freeways. The CIDH pile derives its bearing capacity from passive
earth resistance and is typically considered to be rigid in design and analysis. The analytical
formulation, which calculates the ultimate lateral resistance and the point of rotation,
considers (a) the nonplane strain soil wedge and (b) the concept of developed friction angle …