Suppose while working as a Geotechnical Engineer, we encounter the following situation: a three-storied office building with load bearing walls has to be constructed. At the site, loosely dumped material exits down to a depth of 7 meters underlain by dense sand. Had the soil at shallow depth strong, such a building could have been founded on strip footings. Three decades ago you would have had to choose between either giving up this site altogether and finding a new site or founding the building on raft or on piles.
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