Bowles' and Mayerhof's Bearing Capacity Based on SPT - Excel Calculator - CivilEngineeringBible.com (Download FREE!)Files > Download Bowles' and Mayerhof's Bearing Capacity Based on SPT - Excel Calculator - CivilEngineeringBible.com (FREE!)
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.
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