回転貫入杭の羽根径が施工能率および摩擦抵抗力におよぼす影響(構造)

概要

論文の詳細を見る
In construction process of small size rotary penetrated steel pipes, screw shaped guides attached to the pipes largely improve construction efficiency. On the contrary, the guide screw reduces the frictional resistance of soil around piles if the size of guide screw is too large. In this paper, effective size of guide screw is investigated through a series of loading tests carried out in actual muddy soil. The diameter of steel piles used in the test is 114mm, and different three sizes of guide screws are examined and compared with plain steel pile. As a result, it is concluded that enough frictional resistance can be expected and, at the same time, energy consumption can be reduced to 20% compared with plain pile, if the diameter of the screw is over 210mm.
社団法人日本建築学会の論文
2004-06-20