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:
  Bridge Foundations Bridge Piers Bridges Bridges--Foundations And Piers--Live Loads--Wyoming Bridges--Wyoming--Foundations And Piers--Testing Excavation Rock Excavation 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7014986374c51bcfcd953f9ce4191a95575f00513bf30c595832fdaddf8fe847
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17648/dot_17648_DS1.pdf
• File Type:
  [PDF - 1.69 MB ]