Abstract
The steel pipes with small diameter are often driven into the ground to support temporary scaffolds or fences. The steel pipe piles with tapered and closed end were developed to improve the bearing capacity. The tensile or compressive resistance of these piles was unidentified. We carried out the vertical loading tests of the piles. It was confirmed that the pull-out resistances of the piles with closed end were more than the twice the pipes with open end. It was supposed that the steel pipe pile with closed end extends and hardens the ground at the time of driving.
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