抄録
In order to evaluate the bearing capacity of steel piles with continuous helical wing fixed around a pipe shaft, full-scale loading tests were conducted on eight piles in sand & clay deposits. The results have shown that the shaft resistance of the continuous helix piles is significantly larger than that of the driven piles and/or the steel piles with a helical plate attached near the tip and it can be determined with the frictional resistance of soil acting along the cylindrical surface of pile having a diameter of Dw (Dw = continuous helical wing diameter).