Full-Flow Penetrometer Rate Effects on the Strength Measurement of Peat
Publication: Geo-Congress 2024
ABSTRACT
This paper presents the effects of penetration rate on peat penetration resistance measured with miniature full-flow penetrometers (T-bar and ball). The accuracy of the 20 mm/s standard penetration rate of penetration testing in peat is doubtful. The investigation is conducted by performing a series of miniature full-flow penetration tests in a pressure chamber using various penetration rates under different vertical effective stresses. The results show that the T-bar and ball penetrometers exhibit comparable penetration resistance values at the same penetration rates and effective stresses. The rate effect is interpreted in terms of a non-dimensional penetration rate with the aid of coefficient of consolidation values obtained from one-dimensional oedometer tests. The non-dimensional rate shows that the penetration resistance decreases with an increase in the penetration rate. A transition point from partially drained to undrained responses was determined from the interpretation. Finally, penetration rates for standard field testing were recommended.
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Information
Published In
Geo-Congress 2024
Pages: 477 - 487
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Bars (structure)
- Chemicals
- Chemistry
- Design (by type)
- Effective stress
- Engineering fundamentals
- Engineering mechanics
- Environmental engineering
- Equipment and machinery
- Field tests
- Geotechnical engineering
- Geotechnical investigation
- Load and resistance factor design
- Load factors
- Measuring instruments
- Organic chemicals
- Organic compounds
- Organic matter
- Penetration tests
- Static loads
- Statics (mechanics)
- Stress (by type)
- Structural analysis
- Structural design
- Structural engineering
- Structural members
- Structural systems
- Tests (by type)
- Vertical loads
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