| 摘要 |
PURPOSE: A composite file which is a concrete pile into which a steel pile is inserted is provided to uniformly disperse a driving stress on the head of the steel pipe into the concrete pile, thereby preventing the head of the concrete pile from being damaged by the direct transmission of the driving stress. CONSTITUTION: A composite file (100) includes a steel pipe (20), a concrete pile (10), a reinforcing nut (30), and a fixing bolt (40). The steel pipe is inserted into the hollow portion of the concrete pile with being in contact with the hollow portion. The concrete pile includes a body part having the hollow portion and a reinforcing bar structure inside. The reinforcing nuts corresponding to multiple bolt holes at the middle portion of the steel pipe are buried in the concrete pile. The fixing bolts are fastened with the reinforcing nuts and the bolt holes, and reinforce a joint between the steel pipe and the concrete pile. |
