Abstract (EN):
: Cemented soils are often seen as non-textbook materials, since they don´t fit into the usual behavior of transported
soils in the light of classical Soil Mechanics theories. This fact creates several problems on the interpretation of in-situ
test results, when the classical approaches are used, limiting the application of common in-situ tests. Departing from a long
experience in characterizing Portuguese granitic soils with Marchetti¿s Dilatometer (DMT) a large calibration box (CemSoil
Box) was constructed to work with artificially cemented silty sands, aiming the evaluation of static penetration influence in the
loss of cementation strength, and the overall effects on the stiffness response, giving rise to adequate correlations for deriving
design parameters. The experience was based in the development of artificially samples tested in triaxial cell and in the CemSoil
Box, where blades could be pre-installed and pushed in. Water level, suction and seismic velocities were monitored during the
experience. The final results allowed for the establishment of specific correlations to derive strength (cohesion intercept and
angles of shearing resistance) and stiffness (deformability and small strain shear modulus) parameters, as well as a specific
methodology for controlling suction influence on the respective results.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Contacto:
viana@fe.up.pt
Notas:
www.jrosspub.com: DOI: 10.3328/IJGE.2012.06.02.239-244
Tipo de Licença: