Geology 571 – Engineering Geology
Soils – Part I (Midterm)
Geology (GLGY 571-UCAL) Soils
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Definitions and Key Concepts
The following list is based on the information from Geological Engineering textbook by Luis I. Gonzalez de Vallejo and Mercedes Ferrer (ISBN: 9780415413527). However, the definitions may have been re-worded, completely re-written or copied from open sourced projects to fit this particular course. Associated page number(s) are in parenthesis. Currently, the items are incomplete! This list may not even be updated until the end of 2014 Fall semester. Please use the above quiz for updated study guide.
activity(026,089): is the ratio of the plasticity index to the percentage of clay size particles.
anisotropic(041): preferred orientations that will change the behaviors of materials die to external forces.
Atterberg limits(024): The Atterberg limits are a basic measure of the critical water contents of a fine-grained soil, such as its shrinkage limit, plastic limit, and liquid limit.
biological action(020): changes in soil (also rock) properties due to biological activities and breakdown of organic matter.
bulk density(027): the ratio of total mass to total volume, ρ
bulk unit weight(027): TBA
cementing agents(093): TBA
coefficient of permeability(030): k TBA
coefficient of uniformity(024): Cu TBA
cohesive soils(085): TBA
compression index(061): CcTBA
consistency(024): is the ratio of the water mass in the soil to the solid particle mass.
consolidation(023, 050): TBA
consolidation curve(071): TBA
critical hydraulic gradient(048):
chemical processes(020): changes in soil (also rock) properties due to chemical alterations.
Darcy’s law(031): TBA
deformability(021-23): a property in which a materials undergoes change from its original state.
degree of saturation(027): TBA
deviator stress(082): aka deviatoric stress.
dispersion index(104): TBA
drained vs undrained(051): TBA
dry density(027): TBA
elevation head(029): is v2/2g where v is the discharge velocity at the point under consideration and g is the gravitational acceleration.
fall corn test(025): TBA
failure envelope(072): TBA
fine particle content(024): TBA
frictional soils(085): TBA
geo-engineering(005): filed that deals with all aspects of egineering geology, rock mechanics, soil mechanics and geotechnical engineering.
geological engineering(004): the application of geological and engineering sciences to design and construction in civil, mining and petroleum engineering, and to environment.
geological model(015): a scientific model which repents the spatial distribution of materials, tectonic structures, geomorphologic and hydrogeologic data, and other characteristics of a given site and its area of influence.
geomechanical classification(008): a standardized quantification of engineering geological properties for construction applications.
geotechnical model(015): representation of spatial distribution of materials, tectonic structures, geomorphologic and hydrological data and other characteristics of a given area. They are used to predict the behaviors of geological materials before, during and after construction projects. Also read on geomecanical model(015) and ground behavior model(015).
hydraulic head(029): TBA
hydraulic gradient(31): the loss of piezometric head per unit length.
isomorphic substitution(088): TBA
liquid limit(024): TBA
liquidity index(030): TBA
loading conditions(051): read drained and undreained loading conditions.
oedometer test(065): TBA
oedometric modulus(068): TBA
physical processes(020): changes in soil (also rock) properties due to mechanical processes.
plasticity index(025): TBA
plastic limit(024): TBA
pore pressure(42): TBA
porosity(026): ratio of volume of voids to the total volume of soil n.
pressure head(029): TBA
relative index (density index)(028): TBA
residual soils(020): soils that developed in situ and remain in their original location.
rock mechanics(001): is a theoretical and applied science of the mechanical behavior of rock and rock masses.
saturated unit weight(027): TBA
shrinkage limit(024): TBA
soil mechanics(001): is a branch of engineering mechanics that describes the behavior of soils.
saturation(021): the volume of fluid(s) over a given mass.
specific gravity of solid soil particles(027): TBA
specific surface area(088): TBA
swelling index(061): CsTBA
transported soils(020): soils that have been moved from the original location of formation.
unit weight of solids(027): TBA
unit weight (specific weight)(027): TBA
velocity head(030): TBA
virgin compression line(057): TBA
void ratio(026): ratio of volume of voids to the total volume of soil, e.
water content(024, 27): TBA
weathering profile(020): is a vertical profile of weathering zones from surface to the subsurface. It is usually developed based on the data associated with physical and chemical weathering and biological actions.