Improving foundation design in rock : load test at Burma Road Overpass, final report, December 2009.

Details

• Creators:
  Turner, John P.
• Corporate Creators:
  University of Wyoming. Department of Civil Engineering
• Corporate Contributors:
  Wyoming. Department of Transportation
• Subject/TRT Terms:
  • Bridges
  • Bridge foundations
  • Bridge piers
  • Excavation
  • Rock excavation
  • Bridges--Wyoming--Foundations and piers--Testing
  • Bridges--Foundations and piers--Live loads--Wyoming
  • Rock excavation--Wyoming
• Publication/ Report Number:
  FHWA-WY-09/10F
• Resource Type:
  Tech Report
• Geographical Coverage:
  Wyoming
• Edition:
  Final report; May 2009-Nov. 2009.
• Corporate Publisher:
  Wyoming. Department of Transportation
• Abstract:
  This report describes the results of a bi-directional load test on a drilled shaft foundation in weak sandstone. The test was conducted in ; conjunction with construction of a new bridge at Burma Road Overpass on I-90 in Gillette, Wyoming. The purpose was to provide much ; needed information on side resistance and base resistance in weak sandstone of the Tertiary Wasatch Formation. Load test results are ; compared to design equations for both soil and rock. Design equations based on treating the weak sandstone as cohesionless soil provide ; close agreement with side resistance values measured by the load test. Design equations based on treating the sandstone as rock also ; provide reasonable agreement with the load test results, but comparisons were limited by the inability to obtain representative intact core ; samples suitable for measuring the uniaxial compressive strength of the sandstone. Unit base resistance mobilized in the load test exceeds ; by a significant amount the value of unit base resistance predicted using AASHTO and FHWA design equations. The load-displacement ; response of the test shaft is analyzed by fitting to an analytical model, providing a practical tool for evaluation of trial designs to satisfy ; service limit states. Finally, results of the load test are used to illustrate the application of AASHTO LRFD methodology to design of drilled ; shafts for the bridge at Burma Road Overpass.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17648/dot_17648_DS1.pdf
• File Type:
  [PDF - 1.69 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7014986374c51bcfcd953f9ce4191a95575f00513bf30c595832fdaddf8fe847