SETTLEMENTS OF SHALLOW FOUNDATIONS ON SAND
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概要
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The estimation of settlements of foundations on granular soils requires both a mechanical model for the footing on the soil and an appropriate method for evaluating soil parameters. Both aspects are considered. In the usual case the loads are mainly monotonous and remain below the failure load with an adequate margin of safety. Observed settlements of foundations show considerable scattering. A general trend, however, can be recognized : The settlement per contact pressure increases somewhat with the breadth of the footing. This observation is compared with the predictions of different soil models. The best model is shown to be a heterogeneous half-space whose modulus increases with the square root of depth. The modulus has elastic and plastic features which need not be considered separately. The settlement of larger footings can be fully explained by the well-known behaviour of sand under one-dimensional compression. Applying dimensional analysis to the footing on this heterogeneous half-space yields results that permit consideration of the form of the contact area and of mutual dependence of adjacent footings. The factor inherent in all calculated results is determined by a comparison of observed settlements with Standard Penetration Test data.
- 社団法人地盤工学会の論文
- 1984-12-15