打込み時における鉄筋コンクリートぐい頭部の打撃ひずみ

概要

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This study has been carried out to decide the reinforcement method of the impacted concrete pile by the pile driving. From the analysis of measured values of the dynamic strain on the pile head, the following conclusions have been obtained. Moreover, the author wishes to promote this study and to find out the behaviours of the pile driven in the ground. (1) The relation between the dynamic energy of the hammer and the dynamic strain in the pile. ε_<V.100>=F(1-k)/(EA(S+R/2)) (1) ε_<V.50>=F(1-k)/(EA(S+R)) (2) where ε_<V.100>=the dynamic strain at the point of 100cm from the top of the pile ε_<V.50>=dynamic strain at the point of 50 cm from the top of the pile F=dynamic energy of hammer A=sectional area of the pile E=Young's modulus of concrete S=penetration R=rebound (1-k)=efficiency of the dynamic energy of hammer W=hammer weight H=hammer stroke For F,(1-k) and E in Eqs. (1) and (2), the following values in Table I and Table II is available. [table] [table] (2) The relation between the sectional area of the pile and the dynamic strain of the head of the pile.
社団法人日本材料学会の論文
1967-08-15