|dc.contributor.advisor||Cosentino, Paul J.||
|dc.contributor.author||Jansen, Jacob William||
|dc.description||Thesis (M.S.) - Florida Institute of Technology, 2017||en_US
|dc.description.abstract||The poorly graded sands found throughout Florida provide geotechnical engineers
with a difficult challenge when performing testing samples in laboratory tests.
These challenges have caused lab tests such as the triaxial compression test to be
overlooked. Since geotechnical engineers estimate strength and stiffness parameters
from basic field tests, they often produce overly conservative designs.
Understanding how the automated in-situ PENCEL Pressuremeter (PPMT) test
correlates with the triaxial compression test can reduce the time and costs
associated with laboratory triaxial testing. Results from triaxial tests yield a
Young’s Elastic Modulus, shear strength, and internal friction angle. Results from a
PPMT test yield a pressuremeter modulus, lift off pressure, and a limit pressure.
The different types of outputted data do not allow for direct comparisons to be
made between the triaxial compression test and the PPMT test. This research seeks
to correlate the outputted data.
This research involved twenty PPMT tests performed in poorly graded sands, with
loose to medium dense texture. PPMT results were compared with results from
twenty-one triaxial compression tests performed using soil removed from the test sites. The triaxial test density ranged from 20% to 65% of the soils relative density.
An equation from Baguelin (1978) was proven to correlate triaxial shear strength
with PPMT limit pressure.
Correlations indicate that triaxial elastic modulus and triaxial shear strength
correlate moderately well. The triaxial modulus is 93 times greater than the shear
strength. The PPMT modulus correlates well with the limit pressure, the PPMT
modulus is 8.3 times greater than the limit pressure in loose to medium dense sands
=0.89). The triaxial elastic modulus and PPMT elastic modulus correlation
show PPMT moduli being on average 60% greater than triaxial moduli in similar
density and confining conditions. The correlations from this study indicate that data
from the triaxial compression test and the PPMT test can be correlated.||en_US
|dc.rights||CC BY 4.0||en_US
|dc.title||Correlating Strength and Stiffness Data of the PENCEL Pressuremeter and Triaxial Compression Tests in Florida Sands||en_US
|thesis.degree.name||Master of Science in Civil Engineering||en_US
|thesis.degree.department||Civil Engineering and Construction Management||en_US
|thesis.degree.grantor||Florida Institute of Technology||en_US