A Site-Specific Comparison of Simplified Procedures for Evaluating Cyclic Resistance of Non-Plastic Silt
Publication: Dynamic Response and Soil Properties
Abstract
Assessing the liquefaction potential of silts is a challenging problem for practicing engineers. A common approach to performing such assessments is to apply a fines content "correction" factor to field-based correlations that were developed primarily for sands that relate cyclic resistance and in-situ indices (i.e., standard penetration test (SPT) N-value, cone penetration test (CPT) qc-value, or shear wave velocity (VS)). This paper compares the cyclic resistance estimated using these methods for a site in Providence, Rhode Island which is characterized by deep deposits of non-plastic silt. Standard penetration tests with energy measurements were performed in conjunction with seismic cone penetration tests, and representative samples were collected for laboratory testing. A site-specific VS-based cyclic resistance correlation was developed from cyclic triaxial tests with shear wave velocity measurements and was used as a baseline for comparing the results of current SPT- and CPT-based simplified approaches. The analysis suggests that the existing SPT- and CPT-based methods, provide reasonable predictions of cyclic resistance of the non-plastic silt when the recommended fines content corrections are applied.
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Copyright
© 2007 American Society of Civil Engineers.
History
Published online: Jun 20, 2012
ASCE Technical Topics:
- Comparative studies
- Design (by type)
- Engineering fundamentals
- Engineering materials (by type)
- Fluid mechanics
- Geomechanics
- Geotechnical engineering
- Geotechnical investigation
- Hydrologic engineering
- Laboratory tests
- Load and resistance factor design
- Load factors
- Materials engineering
- Methodology (by type)
- Penetration tests
- Plastics
- Research methods (by type)
- Shear resistance
- Shear tests
- Silt
- Soil liquefaction
- Soil mechanics
- Soil properties
- Soils (by type)
- Structural design
- Synthetic materials
- Tests (by type)
- Viscosity
- Water and water resources
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