Design of Combined Foundation With Piles
The first problem facing the designer of a foundation is to determine whether or not the site conditions are such that piles must be used. Piles are used where upper soil strata are compressible or weak; where footings cannot transmit inclined, horizontal, or uplift forces; where scour is likely to occur; where future excavation may be adjacent to the structure; and where expansive or collapsible soils extend for a considerable depth.