| 摘要 |
PROBLEM TO BE SOLVED: To reduce inserting resistance of a friction pile, and to prevent fluctuation and reduction in pile peripheral surface frictional force. SOLUTION: A first node part 12 and a second node part 13 having a diameter larger than a pile main body 11 are alternately formed in lengthwise directional plural places of the pile main body 11 formed in the long size. Defective parts 16 for passing cement milk muddy water 21 in a hole when inserting a pile into an excavating hole 22 are formed in a plane cut-down shape in these node parts 12, 13. These defective parts 16 are arranged by changing an arranging angle by 90 deg. in the first node part 12 and the second node part 13.
|
