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Evaluating Yield Stress of Soils From Laboratory Consolidation and in-Situ Cone Penetration Tests
For fine-grained soils, the stress history of soils is normally evaluated from series of one-dimensional consolidation tests performed on high-quality samples taken from selected depths below the ground surface. The effective preconsolidation stress (Pc' = σvmax' = σp'), or yield stress (σy'), is defined as the point which separates elastic from plastic behavior. For coarser soils, including silts and sands that are difficult to both sample and test in this manner, in-situ tests may be valuable. Herein, different overconsolidation mechanisms in a variety of geomaterials are discussed through the use of case studies. Interpretative means by geologic inference, consolidation testing, and in-situ cone penetration testing (CPT) are utilized to profile yield stresses. Examples are shown to include soft clay (Australia), calcareous sandy clay deposit (South Carolina), fissured desiccated clay (Louisiana), residual silt (Alabama), and clean glacially-deposited sand (Sweden).
Evaluating Yield Stress of Soils From Laboratory Consolidation and in-Situ Cone Penetration Tests
For fine-grained soils, the stress history of soils is normally evaluated from series of one-dimensional consolidation tests performed on high-quality samples taken from selected depths below the ground surface. The effective preconsolidation stress (Pc' = σvmax' = σp'), or yield stress (σy'), is defined as the point which separates elastic from plastic behavior. For coarser soils, including silts and sands that are difficult to both sample and test in this manner, in-situ tests may be valuable. Herein, different overconsolidation mechanisms in a variety of geomaterials are discussed through the use of case studies. Interpretative means by geologic inference, consolidation testing, and in-situ cone penetration testing (CPT) are utilized to profile yield stresses. Examples are shown to include soft clay (Australia), calcareous sandy clay deposit (South Carolina), fissured desiccated clay (Louisiana), residual silt (Alabama), and clean glacially-deposited sand (Sweden).
Evaluating Yield Stress of Soils From Laboratory Consolidation and in-Situ Cone Penetration Tests
Mayne, Paul W. (author)
Geo-Congress 2013 ; 2013 ; San Diego, California, United States
Sound Geotechnical Research to Practice ; 405-419
2013-02-25
Conference paper
Electronic Resource
English
Evaluating Yield Stress of Soils From Laboratory Consolidation and in-Situ Cone Penetration Tests
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