| 摘要 |
PROBLEM TO BE SOLVED: To provide an execution method of a steel pipe pile capable of effectively expecting tip bearing power and peripheral surface frictional force, and capable of shortening execution time. SOLUTION: A spiral blade 6a of an intermediate steel pipe pile 6 provided with the spiral blade 6a is buried in an intermediate part over the total length to the intermediate layer 7 having an N value of 10 to 30 by a standard penetration test, and a spiral blade 1a of a lower steel pipe pile 1 provided with the spiral blade 1a is buried only in a tip part to a lower support layer 8 having an N value of an average N value of +5 or more of the intermediate layer 7. |
