8 基礎杭に作用するNFの進行過程シミュレーション

概要

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A three dimensional finite element method is presented to analyze the behavior of foundation with piles due to negative skin friction resulting from consolidation by dewatering. The effects of the subgrade reaction coefficient of the pile tip upon the downdrag forces and the neutral point transitions with the passage of time are discussed on the basis of analytical results. The settlement process of pile and soils, the axial force along the pile shaft and the pile group efficiency calculated by this method are compared with those measured by full scale experiments of closed-ended steel pipe piles driven in alluvial cohesive deposits. As a result, we conclude that the present method, in which the boundary condition of the test site is incorporated and the excess pore water pressure caused by the pile driving is considered, is suitable to simulate the field test.
一般社団法人日本建築学会の論文
1998-03-20