Correlation of fully-softened shear strength of clay soil with index properties : phase I.

Details

• Creators:
  Gregory, Garry H. ; Baryun, Azmi
• Corporate Creators:
  Oklahoma State University. School of Civil & Environmental Engineering
• Corporate Contributors:
  Oklahoma. Dept. of Transportation. Planning & Research Division
• Subject/TRT Terms:
  • Shear strength
  • Clay soils
  • Soft clays
  • Slope stability
  • Slope failure
  • Shear strength, Fully-softened clay,
  • Slope stability
• Publication/ Report Number:
  FHWA-OK-10-04
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oklahoma
• Corporate Publisher:
  Oklahoma. Dept. of Transportation. Planning and Research Division
• Abstract:
  Shallow slope failures in clay soils cause many millions of dollars of damage annually on highway ; embankments and cut slopes and necessitate difficult and expensive repairs that negatively ; impact budgets, traffic flow, and the environment. The embankments typically fail when clay soils ; become “fully softened” due to shrink-swell action during wet-dry-wet cycles and experience ; downhill creep. Slope analyses using either peak or residual strength properties do not properly ; model most slope failure or potential failure conditions. The use of peak strength in the analyses ; tends to overestimate the factor of safety (stability) and the use of residual shear strength in the ; analysis tends to underestimate the factor of safety (stability). The use of fully-softened shear ; strength values results in a more accurate analysis and leads to designs or repair methods that ; provide long-term stability at reasonable costs. Understanding the mechanisms of these slope ; failures and being able to economically predict the fully softened shear strength of clay soils is key ; to successful design, repair, and stabilization of clay slopes.
  More +
• Format:
  PDF
• Funding:
  ODOT SPR Item Number 2225
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23206/dot_23206_DS1.pdf
• File Type:
  [PDF - 2.48 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:a18ef66e4c67a0243b74137a3c10d347be79ecc642002d5bacbc55240262eff14821b3440c70f08b43db53a0c92f0223ab652f1dcfeae434c69e77bea1551262