Bearing Capacity of Soil
Bearing Capacity of Soil 1. Ultimate bearing capacity It is the maximum gross pressure on soil at the base of footing at which soil fails in shear. 2. Net bearing capacity It is the maximum net pressure at which soil fails in shear and is equal to ultimate bearing capacity minus overburden pressure where D is the depth of the foundation. 3. Net safe bearing capacity = 4. Gross safe bearing capacity = 5. Safe settlement pressure It is the net pressure which the soil can carry safely without exceeding the allowable settlement. 6. Allowable bearing pressure It is the maximum allowable net bearing pressure from the consideration of shear failure and settlement failure. It is also known as allowable bearing capacity of soil. * Minimum depth of foundation: Rankine’s theory is used to determine minimum depth of foundation. According to it, Dmin = , where q = Intensity of loading According to I.S. specifications in any case it should not be less than 800 mm and 900 mm in sand and clay res...