Civil Engineering Orientation Module 4 : Geotechnical Engineering Flashcards
is the technical specialty that deals with soil and rock as supporting materials for structures.
Geotechnical Engineering
It deals with the various foundation types that work between the structure and the ground. In addition, it deals with the stability of soil or rock slopes whose failure may cause loss of human lives or damage to property.
Geotechnical Engineering
is a basic science that is concerned with the study of the history of the Earth, the
rocks of which it is composed and the changes that it has undergone or is undergoing.
Geology
the science of rocks and earth processes
Geology
the application of geologic
fundamentals to engineering
Engineering Geolory
Examples of Engineering Geology
mapping of active seismic faults that are to be avoided when making plans for human habitat development, roadway
construction, or power plant construction.
are formed from rock as it is acted upon by physical, chemical, and biological forces.
Soil
Engineering viewpoint of making soil
soil is any earth material that can be removed with a spade, shovel or bulldozer and is the product of natural weathering
Geological viewpoint of making soil
soil may be considered
as the superficial unconsolidated mantle of disintegrated
and decomposed rock material
Pedological viewpoint of making soil
soil is the weathered transformation product of the outermost layer of the solid crust differentiated into horizons varying in type and amounts of mineral and organic constituents,
usually unconsolidated and of various depths.
serve as parent material for natural soil formation
Rocks
rocks that are solidified from a molten or partly molten siliceous solution.
Igneous Rocks
molten or partly molten siliceous solution
Magma
When magma cools and solidifies in direct contact with the atmosphere
Extrusive cooling
When magma cools and solidifies in the subsurface
Intrusive cooling
formed naturally by consolidated or unconsolidated transported materials.
Sedimentary Rocks
rocks that form as a result of subjecting
igneous or sedimentary rocks to elevated temperatures and pressures.
Metamorphic rocks
the study of the ways in which rocks or sediments are arranged and
deformed on the earth.
Structural Geology
Any rock unit that is
recognizable and mappable in the field
Formation
boundaries between formations
Contacts
two-dimensional
view of rock distribution
Map view
a view of a vertical slice of
the earth
Geological cross section
combination of those two
representations and gives a 3-D view of formations and contacts
Block Diagram
Geological structures regularly encountered in civil engineering work
folds, faults, joints and unconformities
wavy undulations developed in the
rocks of the Earth’s crust due to horizontal compression resulting from gradual cooling of the Earth’s crust,
lateral deflection and intrusion of magma in the upper strata.
Folds
rocks bent around an
imaginary line
Fold Axis
where the continuity of the rock mass breaks.
Fracture
fractures in crustal strata
along which appreciable shear displacement of the adjacent rock blocks have occurred relative to each
other, probably due to tectonic activities.
Faults
fracture along which the shear displacement has taken place
Fault plane
a fracture where little or no movement has taken place.
Joint
Occur in several sets and are approximately parallel within a specific
set.
Discontinuities
a material whose
physical, mechanical property, etc., are not all the same in each direction.
Anisotropic
the surface/ plane of separation
between two series of rock beds/geological formations that belong to two different geologic ages and they
are, in most cases, different in their geologic structure.
Plane of Unconformity or the Unconformity
occurs when there is erosion of a layer or layers of deposited rock followed by the
deposition of new sedimentary rock on top.
Unconformity
happens when the ages of the layers of
rock that are abutting each other are discontinuous
Unconformity
Sedimentary layer deposited over eroded horizontal sedimentary layer
Disconformity
Sedimentary layer deposited over eroded angular(tilted or folded) rock
Angular unconformity
Sedimentary layer deposited over eroded igneous or
metamorphic rock.
Nonconformity
a branch of mechanics that studies the mechanical properties of various types of soil and its strength at different
moisture-content levels
Soil Mechanics