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Evaluation of geofabric in undercut on MSE wall stability
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Evaluation of geofabric in undercut on MSE wall stability
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Evaluation of geofabric in undercut on MSE wall stability
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Description
Title
Evaluation
of
geofabric
in
undercut
on
MSE
wall
stability
Subject
Shear
;
Geofabric
;
Soil
;
Stress
;
PSI
;
Friction
; '
Friction
angle
'; '
Normal
Stress
';
MSE
wall
; '
Geofabric
friction
'; '
Large
scale
Shear
test
';
Sliding
resistance
;
TA455.G44
K53
2011x
;
Geotextiles--Ohio.
;
Shear
strength
of
soils--Testing.
;
Retaining
walls--Ohio--Design
and
construction.
;
OTP
1.23/7:2011-02
Description
"
February
2011.
"; "
April
,
2011"--Cover.
;
Executive
summary
report
(3
leaves)
laid
in.
;
Includes
bibliographical
references
(leaves
25-26).
;
Sponsored
by:
Ohio
Dept
. of
Transportation
;
State
job
no
.
134396
;
Harvested
from the
web
on
8/16/11
Creator
Khan
,
Lutful
I
.
Publisher
Ohio
Dept
. of
Transportation
,
Research
&
Development
;
Available
through
the
National
Technical
Information
Service
Contributors
Pearson
,
Cynthia.
;
Cleveland
State
University
.
Dept
. of
Civil
and
Environmental
Engineering.
;
United
States
.
Federal
Highway
Administration.
;
Ohio
.
Dept
. of
Transportation
.
Office
of
Research
and
Development
.
Type
Text
Language
eng
Relation
Also
available
online.
;
http://www.dot.state.oh.us/Divisions/Planning/SPR/Research/reportsandplans/Reports/2011/Structures/134396_FR.pdf;
http://worldcat.org/oclc/746952952/viewonline
Description-Abstract
Compaction
of
granular
base
materials
at
sites
with
fine
grained
native
soils
often
causes
unwanted
material
loss
due
to
penetration
at the
base
. In
2007
,
ODOT
began
placing
geotextile
fabrics
in the
undercut
of
MSE
walls
at the
interface
of the
native
soil
and
aggregate
fill
to
facilitate
construction
.
It
is
probable
that the
sliding
resistances
of the
MSE
retaining
walls
are
affected
by this
practice
. At this
time
,
it
is
unknown
if
shear
parameters
at the
base
of the
MSE
walls
are
altered
due
to the
presence
of
geotextiles
at the
soil/stone
(granular
backfill)
interface
and, if the
factor
of
safety
(FS)
against
sliding
failure
is
compromised
. To
address
this
issue
, a
systematic
investigation
of the
shear
parameters
at the
geotextile/stone
interface
and
native-soil/stone
interface
was
conducted
by
Large
Scale
Direct
Shear
tests
.
It
was
observed
that the
shear
strength
between
the
geofabric/stone
interfaces
were
lower
than those of the
soil/stone
interfaces
. The
extent
of the
shear
reduction
depended
on the
properties
of the
base
soil
. For the
same
stone
, the
shear
parameters
at the
geofabric
interface
changed
from those of the
cohesive
soil
interface
such
that
friction
angle
slightly
increased
and the
adhesion
slightly
decreased
.
However
, the
net
shear
strength
at the
geofabric
interface
,
calculated
with
25
psi
normal
stress
, was
generally
lower
. In
case
of
cohesionless
base
soil
, the
shear
parameters
at the
geofabric/stone
interface
reduced
noticeably
from those of
soil/stone
interface
. This, in
turn
,
produced
a
significant
(up
to
30%)
reduction
in
shear
strength
at the
geofabric/stone
interface
,
calculated
under
25
psi
normal
pressure
. The
findings
of this
research
indicate
that the
design
of
MSE
walls
with
geofabric
at the
undercut
may
require
modification
of the
sliding
safety
factor
to
reflect
the
reduced
shear
strength
at the
interface
.
Date-Issued
[2011]
Format-Extent
29
leaves
:
ill
.
(some
col.)
;
28
cm
.
Format-Medium
Government
Publication
OCLC number
746952952
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