Measured Soil Setup of Steel HP Piles from Windsor Bypass Project in North Carolina

Restrikes were performed on piles driven for a North Carolina Department of Transportation highway construction project to verify the required bearing capacity, which was not achieved at the end of initial drive (EOID). Driving records of 98 piles with both initial driving and restrike blow counts and hammer stroke were collected. Six of these piles were driven with a pile-driving analyzer, and Case Pile Wave Analysis Program analysis was performed on the collected pile-driving analyzer data. All piles were steel H-pile piles, and the restrikes were done within 144 h after the EOID. The pile bearing capacities of both EOID and restrike were estimated from the blow counts and hammer stroke using the GRL Engineers Inc. Wave Equation Analysis Program, Version 2005. Soil setup ratios of these piles were computed and statistically analyzed to find a reliable setup ratio that can be applied to the bearing capacity obtained at the EOID of the remaining piles in this project to ensure the required bearing without a restrike. The mean soil setup ratio of all piles in this project was estimated at 1.41. However, no setup ratio can be applied to the EOID bearing capacity of an individual pile with a 98% confidence level. Restrike of every pile is required to ensure this level of confidence. A setup ratio of 1.10 can be applied with a 90% confidence level. The setup ratios vary greatly from pile to pile. Soil setup occurs rapidly after EOID in this project. Soil setup is more significant in loose or soft soils than in dense or stiff soils.

• Record URL:
  https://doi.org/10.3141/2004-01
• 
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Measured+Soil+Setup+of+Steel+HP+Piles+from+Windsor+Bypass+Project+in+North+Carolina&author=K.+Kim&author=C.+Kreider&publication_year=2007
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/159491.aspx
• Authors:
  • Kim, Kyung Jun
  • Kreider, Chris A
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 3-11
• Monograph Title: Soil Mechanics 2007
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2004
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bearing capacity; Bearing piles; Bridge foundations; Bypasses; Pile driving; Road construction; Sheet piling; Soft soils; Support piles
• Identifier Terms: Windsor Bypass Project (North Carolina)
• Uncontrolled Terms: Pile setup; Soil stiffness; Steel piling
• Geographic Terms: North Carolina
• Subject Areas: Construction; Geotechnology; Highways; I42: Soil Mechanics; I51: Earthworks and Soil Drainage;

Filing Info

• Accession Number: 01044050
• Record Type: Publication
• ISBN: 9780309104302
• Files: PRP, TRIS, TRB
• Created Date: Mar 16 2007 10:55AM