多段拡大場所打ち杭における中間拡径部の荷重–沈下関係及び拡大部間隔が支持力に与える影響に関する実験的研究

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  • EXPERIMENTAL STUDIES ON LOAD-SETTLEMENT RELATION OF INTERMEDIATE BELL AND EFFECT OF BELL SPACING ON BEARING CAPACITY IN MULTI-BELLED CAST-IN-PLACE PILE

抄録

<p>Aiming for accurate evaluation of bearing capacity and settlement behavior of multi-belled cast-in-place piles in sand, the characteristics of load-settlement relations and the effect of bell spacing on bearing capacity were investigated by experimental techniques. The findings are summarized as follows: 1) The average curves of the load-settlement relations of intermediate bells based on six full-scale load tests showed larger initial stiffness and curvature than the recommended curve for a pile tip by AIJ. 2) The results of centrifuge modelling tests indicated that smaller bell spacing brought lower resistance of an intermediate bell and the change of ground failure mechanism.</p>

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