This paper summarises 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 and cohesion to describe the transition of passive lateral earth pressure development from the initial to the ultimate lateral loading condition. Finally, the developed formulation was used to compare the results with those obtained from field and laboratory model testing. Included are comparisons of the ultimate lateral load, the point of rotation, and the distribution of the passive lateral earth pressure.
Samenvatting