支持杭の載荷試験における降伏荷重の力学的意義に関する考察(第1報)

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タイトル別名
  • 5) A STUDY ON "YIELD BEARING CAPACITY" OF BEARING PILES (PART I)
  • 支持杭の載荷試験における降伏荷重の力学的意義に関する考察-1-
  • シジ クイ ノ サイカ シケン ニ オケル コウフク カジュウ ノ リキガクテキ イギ ニ カンスル コウサツ 1

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In this study, the author has tried to obtain a answer to the question what happens on pile under the ground surface when loading on a bearing pile reaches to "yield bearing capacity". In Part I, first of all the relations between the character of the load-settlement curve and the definition of "yield bearing capacity" are discussed. As the result, it is explained that load (Q_0)〜settlement (u_0)〜time (t) curves are fairly suitable to the expression of the following formula, [numerical formula]・・・・・・(1) where α, β and n are constant, until some limit value of load is reached, wich is defined as "yield bearing capacity". As a rule, the settlement of pile toe is composed of the deformation of pile and the settlement of pile point. Accordingly, the characters of stress-strain curves of pile materials as concrete and steel, skin friction-displacement curves of soil at pile surface and load-settlement curves of plate loading tests on foundation are discussed in comparison with formula (1).

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