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Rock slope design criteria
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Rock slope design criteria
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Description
Title
Rock
slope
design
criteria
Subject
'
Rock
slope
design
';
Rockfalls
;
Undercutting
; '
Catchment
ditches
';
Drainage
; '
Rockfall
simulations
';
TA706.S53
2010x
;
Rock
slopes--Ohio--Design
and
construction.
;
OTP
1.23/7:2010-11
Description
"
June
2010.
"; "
FHWA/OH-2010/11--Technical
rept
.
documentation
p.
;
Includes
bibliographical
references
(p
.
281-287).
; For the
Ohio
Dept
. of
Transportation
,
Office
of
Innovation
,
Partnership
, and
Energy--Innovation
Research
&
Implementation
Section
;
State
job
no.
:
134325
;
Harvested
from the
web
on
12/1/10
Creator
Shakoor
,
Abdul
.
Publisher
Ohio
Dept
. of
Transportation
;
Available
through
the
National
Technical
Information
Service
Contributors
Admassu
,
Yonathan.
;
Kent
State
University.
;
Ohio
.
Dept
. of
Transportation.
;
United
States
.
Federal
Highway
Administration
.
Type
Text
Identifier
http://www.dot.state.oh.us/Divisions/TransSysDev/Research/reportsandplans/Reports/2010/Geotechnical/134325_FR.pdf
Language
eng
Relation
Also
available
online.
;
http://worldcat.org/oclc/688486210/viewonline
Description-Abstract
Based
on the
stratigraphy
and the
type
of
slope
stability
problems
, the
flat
lying
,
Paleozoic
age
,
sedimentary
rocks
of
Ohio
were
divided
into
three
design
units
:
1)
competent
rock
design
unit
consisting
of
sandstones
,
limestones
, and
siltstones
that
may
exhibit
discontinuity-related
failures
;
2)
incompetent
rock
design
unit
consisting
of
shales
,
claystones
, and
mudstones
that
may
exhibit
raveling
and
gully
erosion
; and
3)
inter-layered
design
unit
consisting
of
both
competent
and
incompetent
rocks
where
differential
weathering
may
result
in
undercutting-induced
failures
.
Data
regarding
geological
parameters
(stratigraphy
,
joint
orientation
,
joint
spacing
,
bedding
thickness
,
total
thickness
of
rock
unit)
,
geotechnical
parameters
(point
load
strength
index
,
slake
durability
index
,
plasticity
index
,
geologic
strength
index
,
rock
quality
designation)
, and
geometrical
parameters
(slope
height
,
slope
angle
,
catchment
ditch
width
,
catchment
ditch
depth)
were
collected
for
26
cut
slopes
containing
the
three
design
units
.
Twenty
three
additional
sites
were
later
added
to the
study
for a
more
detailed
investigation
of
undercutting-induced
failures
within
inter-layered
rock
sequences
and the
instability
caused
by
raveling
of
incompetent
rock
. The
data
were
used
to
perform
slope
stability
analyses
including
kinematic
analysis
using
discontinuity
data
,
global
stability
analysis
using
the
geological
strength
index
(GSI)
and the
Franklin
shale
rating
system
, and an
analysis
for
determining
the
stable
slope
angles
using
the
approach
described
in the
Ohio
Department
of
Transportation
Geotechnical
Bulletin
3
(GB
3)
.
Results
show
that
slopes
cut
at
0.5H:1V
and
0.25H:1V
are
adequate
in
minimizing
the
potential
for
discontinuity
related
failures
in
competent
rock
design
units
and
second-cycle
slake
durability
index
(Id???)
values
can
be
used
to
select
stable
slope
angles
for
incompetent
rock
and
inter-layered
rock
design
units
.
Based
on
Id??
?
values
, these
angles
range
from
<
2H:1V
to
0.5H:1V
.
RocFall
analysis
indicates
that
either
a
13
ft
(3.9
m)
wide
by
1
ft
(0.3
m)
deep
ditch
with a
10
ft
(3
m)
wide
flat
bottom
and a
3H:1V
foreslope
or
16
ft
(4.8
m)
wide
by
1
ft
(0.3
m)
deep
ditch
with a
10
ft
(3
m)
wide
flat
bottom
and a
6H:1V
foreslope
would
adequately
contain
at
least
95
%
of the
rockfalls
, as
long
as the
slope
height
does
not
exceed
a
certain
limit
. For
higher
slopes
,
either
rockfall
barriers
or
wider
and
deeper
catchment
ditches
will be
required
. The
choice
between
a
rockfall
barrier
and a
catchment
ditch
will
depend
on
economic
considerations
and/or
space
limitations
.
Based
on these
results
,
detailed
cut
slope
designs
,
including
slope
angle
,
catchment
ditch
and
bench
design
, and
stabilization
techniques
, are
recommended
for
each
of the
three
design
units
.
Date-Issued
2010]
Format-Extent
xx
,
706
p
. :
ill.
,
col
.
maps
;
28
cm
.
Format-Medium
Government
Publication
OCLC number
688486210
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