Development of steel pipe pile with a casting screw

We developed steel pile that installed the screw made of the casting in steel pipe. This report intended for steel pipe pile which we developed, and we performed a bending test, a torque test and a load test. In various test results, 1), 2) became clear. 1) As a result of bending test, the permission load became 222kN by a normal type, and it was it with 170kN by the large wing type. 2) As a result of load test, Ap of the calculated support power became a value to take 0.75 for a screw cross section.