236
15 Risk-Informed Decision Making
Table 15.6 (continued)
2.2 to
2.4
II
Above
Average
Evaluate
design and
performances
of
nearby
structures
Run
standard
tests on
undisturbed
specimen
Determine FS
using
effective
stress
parameters
and pore
pressure
Part time
supervision
by
qualified
engineer
Periodic
inspection by
qualified
engineer
Exploration
program
tailored to
project
conditions
by qualified
engineer
Measure
pore
pressure in
strength
tests
Adjust for
significant
differences
between field
stress paths
and stress
path implied
in analysis
that could
affect design
No errors
or
omissions
No
uncorrected
malfunctions
Evaluate
differences
between
laboratory
tests
conditions
and field
conditions
Selected field
measurements
Routine
maintenance
0
0
0
0
0
III
Average
Evaluate
performances
of
nearby
structures
Index tests
on samples
from site
Rational
analyses
using
parameters
inferred from
index tests
supervision
Annual
inspection by
qualified
engineer
Estimate
subsoil
profile from
existing
data and
borings
Maintenance
limited to
emergency
repairs
0.6 to 0.7
0.2 to 0.3
0.2
0.6
0.6
IV Poor
No field
investigation
No
laboratory
tests on
samples
obtained at
the site
Approximate
analyses
using
assumed
parameters
No
construction
supervision
by
qualified
engineer
Occasional
inspection
No
construction
control
tests
No field
measurements
0
0
0
0
0
Informal
construction
No filed
measurements
0 0.2–0.3
0.2
0
0