Patent ID: 8777521

Claim:
A steel pipe pile characterized by comprising a first steel pipe pile that has a hollow first steel pipe and a first helical fin formed helically for at least one turn on the outer periphery of the first steel pipe from one end toward the other end of the first steel pipe at a constantly equal pitch; and a second steel pipe pile that has a hollow second steel pipe and a second helical fin formed helically for at least one turn on the outer periphery of the second steel pipe from one end toward the other end of the second steel pipe at a constantly equal pitch and that is joined at an end to the other end of the first steel pipe pile, the pitch of the first helical fin and the pitch of the second helical fin being equal, and the first helical fin and second helical fin being continuous along an imaginary helix at the joint between the first steel pipe pile and the second steel pipe pile, further comprising at one end of the first steel pipe, a first cut region extending the peripheral length of the first steel pipe along the first helical fin and a second cut region extending the peripheral length of the first steel pipe, wherein the first and second cut regions share a beginning and end point so as to connect and form a cut-out portion which defines a pile tip.