Dynamic Cone Penetration Resistance of Soils — Theory and Evaluation
Publication: Geotechnical Engineering for Transportation Projects
Abstract
A theory based on the pore collapse concept applied to cylindrical cavity expansion is developed for evaluating Dynamic Cone Penetration (DCP) resistance and predicting Dynamic Cone Penetration Index (DCPI) in c-φ soils. A closed form solution for the penetration resistance and DCPI is developed. The present analyses assume the soil matrix to flow according to a rigid-plastic rule in the core region surrounding the cone. Thus, a free boundary defining the plastic domain develops and constitutes a part of the solution. The soil beyond that region is in its linear elastic state and is considered to have negligible contribution, since the mechanism governing the penetration is predominantly dependent on volumetric change due to pore compressibility. An energy balance criterion is utilized to calculate the DCPI, which is compared with experimental values observing good agreement. The effect of angle of internal friction φ, on penetration resistance/DCPI is much more significant than that of cohesion, c, especially at low initial porosity levels.
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© 2004 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Cavitation
- Closed form solutions
- Design (by type)
- Engineering fundamentals
- Field tests
- Fluid dynamics
- Fluid mechanics
- Geomechanics
- Geotechnical engineering
- Geotechnical investigation
- Hydrologic engineering
- Load and resistance factor design
- Load factors
- Mathematics
- Penetration tests
- Soil analysis
- Soil compression
- Soil dynamics
- Soil mechanics
- Soil properties
- Structural design
- Tests (by type)
- Water and water resources
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