テーパー剛杭の鉛直押込み力〜沈下量関係の一解析法

概要

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For a tapered pile of which the top cross section is greater than the bottom cross section, an increase in the side resistance can be expected when the pile is pressed into cohesive and/or cohesionless soils from the ground surface. This paper presents a theoretical method for the analysis of the vertical response of the tapered pile being pressed into the ground. The method considers two ultimate resistances, the side friction and point bearing capacity of the pile. In this method, the finite cavity expansion theory is used to model an increase of the side resistance due to the radial ground expansion, and the theory of the second ultimate point bearing capacity proposed by Takano (1981) is applied for the point resistance. The limited parametric studies are made for the tapered piles and uniform cross-sectional piles, i.e. the straight piles. From the studies, it is found out that the tapered pile has the advantage of the straight pile in the vertical response.
社団法人日本建築学会の論文
2006-05-30