Page 289 - Analysis and Design of Energy Geostructures

264 Analysis and Design of Energy Geostructures

Questions and problems
Statements
a. Gravity forces dominate interactions between phases in fine-grained soils:
i. True
ii. False
b. Coarse-grained soils are generally more sensitive to temperature variations than
fine-grained soils:
i. True
ii. False
c. Define the OCR. State for which values of this parameter soils can typically be
considered normally consolidated (NC) or overconsolidated (OC).
d. Describe the essential features of the behaviour of fine-grained soils to one hea-
ting cooling cycle depending on the consolidation state.
e. The apparent preconsolidation pressure decreases at constant void ratio with
increasing temperature:
i. True
ii. False
f. Fine-grained soils under NC conditions expand upon heating:
i. True
ii. False
g. Describe the phenomenon of plastic accommodation.
h. Describe the relationship between plasticity index and thermally induced volu-
metric strains of fine-grained soils.
i. Coarse-grained materials can be characterised by the thermal collapse
phenomenon:
i. True
ii. False
j. The yield surface of fine-grained soils shrinks at constant void ratio with increas-
ing temperature:
i. True
ii. False
k. The shrinkage of the yield surface with increasing temperature that is observed for
fine-grained soils is not homothetic, depends on the stress history and is associated
with thermal softening:
i. True
ii. False
l. Compressibility parameters can be considered insensitive to temperature variations:
i. True
ii. False