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Download Bowles' and Mayerhof's Bearing Capacity Based on SPT - Excel Calculator (FREE!)
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Soil bearing capacity by SPT numbers

The buoyant unit weight must be used if the groundwater table is at or above the base of the footing (that is zw < D), for in this case the whole of the potential slip mechanism below the footing base is under water. Since the depth of the slip mechanism is of the order of B below the base of the foundation (that is, a total depth of D + B), if the water table is below this depth, the material unit weight must be used. A simple interpolation can be used for water table depths between D and D + B.

 

meyerhof, mayer hof, spt



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