Geology Reference
In-Depth Information
Common failings
Comments
Desk study inadequate
No site reconnaissance and mapping of
exposures.
Failure to interpret the landscape
e.g.
colour of soil, topography, vegetation, seepage.
-
Lack of anticipation of geological
associations, e.g.:
These are really tasks for a
trained and experienced
engineering geologist.
General
-
Link between landscape and geological
history.
-
Significance of soil origin.
-
Metamorphic and igneous associations.
-
Origins of discontinuity networks.
-
Lateral and vertical variation,
especially in weathered terrain.
Inadequate or incompetent investigation.
Investigations must be targeted at
important unknowns.
Failure to examine samples (designer).
May miss vital clues.
Misinterpretation of data.
Over-reliance by designer on
interpretation by ground
investigation contractor.
Ignoring signi
cance of lost samples and poor
Poor recovery often equates with
poor ground conditions.
recovery.
Designer fails to recognise signi
cance of ground
Most soil and rock mechanics
textbooks say little about
geology and training in civil
engineering courses is often
super
information.
Site-speci
c
cial.
Contractor fails to examine samples or site.
Tender restrictions might
constrain accessibility but if
prevented from so doing
contractor should document this.
Instrumentation inadequate (type, location and
monitoring arrangements).
Installation must enhance
ground models and allow
prediction for project
construction and lifetime.
strong to strong Great Oolite limestone with well-de
ned bedding
planes dipping shallowly at about 4 degrees to the northeast. The
rock also had many joints orthogonal to bedding, many of which
were open, partly as a result of dissolution and partly due to
blasting damage. The limestone overlies Fullers Earth, which is a
clay-rich formation. The land
ll operatives had been advised that
