TAPERED STEEL PIPE PILE AND METHOD FOR PULLING OUT THE SAME

To provide a tapered steel pipe pile which can be easily pulled out at the time of removal and a method for pulling out the same.SOLUTION: A tapered steel pipe pile according to the present invention is a tapered steel pipe pile (4) installed on the underwater ground to support a floating structure, and has a straight portion (41) having a cylindrical shape that forms, at one end, a circular first opening (43) orthogonal to the central axis (O) of the tapered steel pipe pile and a tapered portion (42) which is connected to the other end of the straight portion (41), which extends to the opposite side of the first opening (43), which is reduced in diameter at a predetermined taper angle (θ) in the central axis (O) direction and which has a circular second opening (44) at the tip end orthogonal to the central axis (O).SELECTED DRAWING: Figure 2 【課題】撤去時に容易に引き抜き可能なテーパー付鋼管杭及びその引き抜き方法。【解決手段】本発明に係るテーパー付鋼管杭は、水上構造物を支持するために水底地盤に設置されるテーパー付鋼管杭(4)であって、一端にテーパー付鋼管杭の中心軸(O)に直交する円形の第１開口部(43)を形成する円筒形状を有するストレート部(41)と、ストレート部(41)の他端に連接し且つ第１開口部(43)の反対側に延伸し、中心軸(O)方向に所定のテーパー角度(θ)で縮径し、先端に中心軸(O)に直交する円形の第２開口部(44)を形成するテーパー部(42)と、を有することを特徴とする。【選択図】図２