砂地盤における基礎の沈下量の予測について : その2実験的研究

概要

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In this paper, deformations in a ground are discussed through the experiments. Very small deformations are measured in the following method. The strains in a ground caused by loading are measured by the strain gauges, and then the deformations were derived through the measured data. Distributions of vertical strains under the center of the base have the following characteristics. The depth where the maximum vertical strains are caused by foundation continuous footing (the depth is dimensionless) becomes less deep as the width of the foundation increases. Moreover, the depth where the strain can be regarded as almost zero becomes less deep as the width of the foundation increases. In case of circular foundation the vertical strains under the center of the base show almost the same distributio!is. These facts have the totally same characteristics as was shown by the previous paper in A. I. J. No. 365. Moreover, the predicted settlements of foundation in the previous paper are almost the same with the results of the experiments. In case of foundation continuous footings, 80 % of the settlement of foundation is caused by deformation of sand bases less deep than the double value of the width of the foundation. As for circular footings, about 70 % of the settlement of foundation is caused by the deformation of sand bases less deep than the diameter of the footing.
社団法人日本建築学会の論文
1987-06-30