Shear Strength of Clay and Silt Embankments

The highway embankment is one of the most common large-scale geotechnical facilities constructed in Ohio. In the past, the design of these embankments was largely based on soil shear strength properties that had been estimated from previously published empirical correlations and/or crude soil test results. This is because either the actual soil fill material is not available for testing at the time of embankment design or detailed shear strength determination of soil samples in the laboratory tends to be time-consuming and expensive. Structural stability of these embankments is vital to the state economy and public safety. There is a strong need to conduct a study to examine whether the empirical correlations are truly applicable to Ohio soils and to develop comprehensive geotechnical guidelines concerning the shear strength properties of cohesive soils typically used in Ohio. In this study, soil samples from nine highway embankment sites scattered across Ohio were tested both in the field and laboratory to establish comprehensive geotechnical properties of cohesive soil fills, which represent a wide range of geological features existing in the state. The large volume of soil data produced in the study was then analyzed to evaluate reliability of the empirical correlations and derive statistically strong correlations for shear strength properties of cohesive soil fill materials found in Ohio. Based on the outcome of these analyses, multi-level guidelines are proposed by the author for estimating shear strength properties of Ohio cohesive soils more confidently.


  • English

Media Info

  • Media Type: Web
  • Edition: Technical Report
  • Features: Appendices; Bibliography; Figures; Photos; Tables;
  • Pagination: 319p

Subject/Index Terms

Filing Info

  • Accession Number: 01146828
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/OH-2009/7
  • Contract Numbers: 134319
  • Created Date: Dec 22 2009 3:36PM