In practice, the bearing capacity of foundations on soft clay can be improved by In placing a layer of compacted sand or gravel. The lack of detailed design information concerning the bearing capacity of such inhomogeneous soil profiles is due primarily to the difficulty in obtaining exact solutions. In recent years, approximate solutions have been presented for a number of commonly encountered inhomogeneous soil profiles in an attempt to provide acceptable design data, with methods such as that of Hanna & Meyerhof (1980) frequently cited for the case of a sand layer overlying soft clay.
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