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Lateral Resistance of Steel Pipe Pile with Wings by Static Cyclic Loading Tests

Conference paper
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Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

Steel pipe piles subjected to lateral loads exhibit toughness even after yielding of the steel, and thus possess a high earthquake resistance. A steel pipe pile with wings attached to its tip can be driven into the ground by rotation. However, because the wings are larger than the pile diameter, the soil around the pile shaft is loosened, resulting in an alteration of the lateral subgrade reaction of the pile. In the present study, static lateral loading tests were conducted to ascertain how the lateral resistance of a pile was affected by the attachment of wings and the wing diameter, and to examine the occurrence of secular change after one year.

The soil deposit at the test site was a weak volcanic ash. Four types of piles of diameter (Dp) 267.4 mm and length 5000 mm were tested, namely, piles without wing, piles with wing diameters 2.3Dp and 3.0Dp, respectively (used to investigate the effect of the wing diameter), and a pile with wing diameter 2.3Dp after one year of its insertion into the ground (used to evaluate the recovery of the loosened soil). The cyclic load applied to a pile was gradually increased by displacement control at the pile head, and the lateral displacement of the pile head and the bending moment along the pile were measured. The test results showed that (1) the lateral resistances of the winged piles were smaller than that of the piles without wing, owing to the loosening of the surrounding soil by the wings; (2) the maximum bending moments of the winged piles tended to be smaller than that of the piles without wing for a given pile head displacement; (3) the pile wing diameter had little effect on the lateral resistance; and (4) there was no aging in the lateral resistance of the loosened soil around a winged pile, even one year after insertion of the pile.

Keywords

Steel Pipe Piles Lateral Resistance Pile Head Load Wing Diameter Bending Moment Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors would like to express their special gratitude to Dr. Eng. Kashiwa and Dr. Eng. Nakano for their useful suggestions for this study. The study was supported by JSPS KAKENHI (Grant No. JP17H03342).

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Architectural Engineering, Division of ArchitectureOsaka UniversityOsakaJapan
  2. 2.Sansei IncTokyoJapan

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