An existing building is to be renovated. One of the existing footings is 1.5 m by 1.5 m in area and 1 m below the adjacent soil surface. The structural changes for the building would require this footing to support a loading of 2,000 kN. Determine if the footing size and soil bearing capacity are adequate. Soil investigation indicates that the foundation soils are medium-dense to dense sands, with a rigidity index value of 140. The soil angle of internal friction is 34°, and the unit weight is 19 kN/m3. The soil surrounding the foundation is well compacted, and the depth factors should be applied. Base the calculations on use of the extended bearing capacity equation, applying a factor of safety between 2.5 and 3.
An existing building is to be renovated. One of the existing footings is 1.5 m by 1.5 m in area and 1 m below the adjacent soil surface. The structural changes for the building would require this footing to support a loading of 2,000 kN. Determine if the footing size and soil bearing capacity are adequate. Soil investigation indicates that the foundation soils are medium-dense to dense sands, with a rigidity index value of 140. The soil angle of internal friction is 34°, and the unit weight is 19 kN/m3. The soil surrounding the foundation is well compacted, and the depth factors should be applied. Base the calculations on use of the extended bearing capacity equation, applying a factor of safety between 2.5 and 3.
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