| 摘要 |
PURPOSE:To form a pile having good bending performance at low cost by a method in which a concrete layer is provided on the inside of an outer shell cylinder formed by spirally rolling a steel plate of a specific thickness, and reinforcing bars are set in the axial direction in the concrete layer of a pile. CONSTITUTION:A thin steel strip of a thickness of 0.25-1.6 is spirally rolled and both sides of the joint of the spirally rolled steel strip are folded and clamped to form an outer shell cylinder 1. Concrete layer 3 of a hollow cylinder form is lined on the inside of the cylinder 1 and reinforcing bars 2 are set in the axial direction in the concrete layer 3 of the pile. |
