6) SOME PROBLEMS ON BEARING CAPACITY AND IMPACT STRESSES IN STEEL PILE (PART-1)

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  • 鋼ぐいの支持力・打撃応力に関する2,3の問題(その1)
  • 鋼ぐいの支持力・打撃応力に関する2,3の問題-1-
  • コウグイ ノ シジリョク ダゲキ オウリョク ニ カンスル 2 , 3 ノ モンダイ 1

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In Part 1 of this paper the writers discuss the way of determining the bearing capacity of a steel pile on the baris of number of blows in standard penetration tert of the subsoil and recommend a formula as shown in the following: [numerical formula] where R_a: allowable bearing capacity (t) A_p: closed area at the tip of steel pile (m^2) ψ_p: closed perimeter of steel pile (m) for pipe pile ψ_p=π×outer diameter for H pile ψ_p=2 (flange width+web height)[numerical formula] N_1: N-value at the level of pile tip N_2: average N-value in the range of 10B upward from the pile tip B: diameter or width of the pile (m) Ns: average N-value of sandy soils adjacent to the pile L_s : length of the portion of pile driven through randy soils N_c: average N-value of clayey soils adjacent to the pile L_c: length of the portion of pile driven through clayey soils.

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