Download mechanically stabilized earth (mse) wall systems

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DRAINAGE SOLUTIONS
SINCE 1908
MECHANICALLY
STABILIZED EARTH
(MSE) WALL SYSTEMS
PERMANENT AND TEMPORARY ENGINEERED
WALL SOLUTIONS
ECONOMICAL
DURABLE
VERSATILE
ARMTEC.COM
MSE RETAINING WALLS
Armtec Mechanically Stabilized Earth (MSE) walls and Reinforced Soil Slopes
provide a cost-effective earth retention solution for both permanent and
temporary applications.
TYPICAL APPLICATIONS
Mechanically stabilized earth technology allows the construction of slopes that
are steeper than those naturally permitted by the native soil’s internal friction
angle. Steeper slopes permit more efficient land usage reducing overall
development costs.
•• Preload embankments
Armtec systems utilize geosynthetics such as uniaxial geogrids or high strength
woven geotextiles to reinforce the soil and create a stable gravity mass to resist
potential lateral loading. When slopes become steeper than 70 degrees above
the horizontal, they require fascia materials to provide increased stability at the
face of the system. A variety of facing options are available such as welded wire
mesh, Bin-Wall, geocell and decorative concrete blocks.
•• Golf courses
•• Land development
•• Highway and road structures
•• Forestry, mining, and oil and
gas applications
•• Landscape projects
•• Residential properties
With Armtec’s MSE WALL SYSTEMS,
your project is on solid ground.
STRONG AND
DURABLE
• Increased soil stability
• Proven long-term
performance
• Exceptional erosion
protection
FUNCTIONAL
• Allows construction of
vertical or near-vertical
MSE walls
• Flexible system tolerates more movement than
rigid walls
ECONOMICAL
VERSATILE
• Efficient land usage
• Suitable for both permanent and temporary applications
• Potential for on-site soil to
be used as backfill
• Wide range of fascia options available
• Low upfront cost
WHISTLER SKI TRAIL
GEOGRID WRAP-BACK DESIGN USED TO
ACOMMODATE LOCATION’S SEISMIC ACTIVITY
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VEGETATED WALLS PROVIDE AN AESTHETICALLY
PLEASING, NATURAL APPEARANCE
MSE WALL DESIGN
TYPICAL MSE WALL COMPONENTS
MSE Walls are comprised of three components: soil reinforcement, backfill material and a facing unit.
1. Soil Reinforcement
Uniaxial geogrids or high strength woven geotextiles provide soil reinforcement.
2. Backfill Material
A free draining, granular material is typically recommended for soil reinforcement backfill.
The gradation of backfill material follows AASHTO LRFD construction specifications.
SIEVE SIZE
PERCENT PASSING (%)
100mm (4.0in)
100
4.25mm (No. 40)
0 – 60
75μm (No. 200)
0 – 15
• Minimum backfill compaction is typically 95% Standard Proctor Maximum Dry Density (SPMDD)
3. Facing Unit
Typical facing units include welded wire mesh, geocell, Bin-Wall, decorative concrete blocks
or vegetated face.
FIGURE 2: Typical MSE Retaining Wall
REINFORCED SOIL ZONE
NOTE:
The following industry accepted standards
of practice are used in design:
NATIONAL CONCRETE MASONRY
ASSOCIATION (NCMA) FEDERAL HIGHWAY
ADMINISTRATION (FHWA)
1 SOIL REINFORCEMENT
3
GEOCELL
FASCIA
NATIVE SOIL
2 COMPACTED
BACKFILL MATERIAL
PERFORATED
DRAIN PIPE
FOUNDATION SOIL
ARMTEC DRAINAGE SOLUTIONS
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PERMANENT WELDED WIRE MESH WALLS
ROCK FACED WELDED
WIRE MESH WALL
The combination of a welded wire
mesh facing, biaxial grid wrap and
uniaxial geogrid soil reinforcement
produces a rock aggregate facing that
is both cost-effective and reliable.
Rock aggregate faced systems are
best suited for structures with
geometries that are too steep to
support vegetation.
FLEXIBLE FASCIA IS IDEAL FOR AREAS WHERE SETTLEMENT MAY
OCCUR DUE TO COMPRESSIBLE FOUNDATION SOILS
VEGETATED WELDED WIRE
MESH WALLS
Vegetated welded wire mesh walls
are both environmentally friendly and
can provide an aesthetically pleasing
structure. Welded wire mesh facing
is combined with a biaxial green grid
wrap and uniaxial geogrid for soil
reinforcement. The facing system
provides an environment for
long-term vegetation growth on an
erosion controlled face. During
construction, seeded topsoil or
hydro-seed material is placed behind
the biaxial green grid at the face of the
wall to initiate vegetation growth.
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MSE VEGETATED WALLS PROVIDE A DURABLE FACING AND
SURFACE EROSION PROTECTION
VARIES
TYPICAL SECTION
NTS
FIGURE 2: Wire mesh unit detail
NOTE:
4 GAUGE WIRE WITH WIRE
STIFFENER AT 50mm SPACING (TYP)
Other sizes of wire mesh baskets are also
available. Contact an Armtec representative for
further information.
m
0m
50
mm
00
30
WIRE STRUT STIFFENERS
m
0m
mm
10
0
10
m
0m
40
FIGURE 3: Typical section of welded wire mesh wall facing unit
COMPACTED SOIL FILL
WELDED
WIRE MESH
TOPSOIL AND SEED
EROSION CONTROL
BLANKET OR
BIAXIAL GEOGRID
PRIMARY SOIL REINFORCEMENT
(UNIAXIAL GEOGRID)
NATIVE SOIL
OPTIONAL
SPRIGS
PERFORATED
DRAIN PIPE
FOUNDATION SOIL
MSE RETAINING WALLS ARE VERSATILE
AND CAN BE CUSTOM ENGINEERED TO SUIT
YOUR SITE CONDITIONS!
ARMTEC DRAINAGE SOLUTIONS
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PERMANENT WALLS
GEOCELL
Armtec’s cellular confinement systems
can be used in conjunction with
granular or weaker soils to create an
engineered-grade composite. Typical
applications include earth retention,
channel lining, slope protection and
load support. Geocells also provide an
economical option for structural end
treatments. Confinement of a weaker
soil within the individual cells of the
geocell mat allows these soils to
exhibit characteristics of stronger
soils. When utilized in conjunction with
uniaxial geogrids, geocells provide an
effective facing option. Geocell MSE
walls can be conventionally seeded or
hydro-seeded after construction to
create vegetative walls.
GEOCELLS CAN GREATLY REDUCE THE NEED FOR EXPENSIVE
GRANULAR MATERIALS
BIN-WALL MSE WALLS
Armtec’s Bin-Wall retaining wall
system is a four-sided bin-type earth
retention system. As a MSE wall,
Bin-Wall uses standard front-face
Bin-Wall components in conjunction
with uniaxial geogrid to create a
stable gravity mass. The geogrid
soil reinforcements allow Armtec’s
Bin-Wall to be easily altered to
accommodate obstructions and
improve stabilty. This system provides
an ideal solution for site locations
with limited or constrained access,
such as in the construction of long
walls in narrow corridors.
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A BIN-WALL MSE WALL WITH GEOGRID SOIL REINFORCEMENT
PROVIDES A COST–EFFECTIVE SOLUTION WHERE ACCESS IS
LIMITED AND OBSTRUCTIONS ARE PRESENT
TEMPORARY WALLS
Temporary walls can be constructed
utilizing high strength non-woven
geotextiles and temporary forms to
create geotextile wrapped faced walls
which are a cost effective and reliable
temporary wall solution.
Temporary walls reinforced with
geosynthetics are a valuable tool for
construction sites that need to divert
traffic, water flow or apply a surcharge
to consolidate foundation soils while
maintaining the existing surroundings.
TEMPORARY WALLS OFFER AN ECONOMICAL SOLUTION WITH THE
STRENGTH TO ACCOMMODATE SIGNIFICANT LOADING
When temporary forms cannot be
used due to site constraints, welded
wire mesh facing in combination with
geotextiles is an excellent alternative.
HEADWALLS
Headwalls are used in culvert and
structural plate installations to provide
slope retention, improved hydraulics
and protection against erosion, scour,
piping and uplift.
Armtec’s wire mesh and geocell
MSE walls provide an effective and
economical headwall solution. They
are easy to install and native material
can often be used for backfill, saving
both time and money.
MSE HEADWALLS PROVIDE AN ATTRACTIVE FINISH TO STRUCTURAL
PLATE STRUCTURES
ARMTEC DRAINAGE SOLUTIONS
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Find out how MSE Wall Systems can be used on your next project.
Contact us today.
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Armtec is a leading Canadian infrastructure and construction materials company combining
creative engineered solutions, relevant advice, dedicated people, proven products and a national
presence with a local focus on exceptional customer service.
1-877-5-ARMTEC | ARMTEC.COM
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Drawings and product details are for information and/or illustrative purposes only, and may vary.
Please contact your local Armtec representative for the most current product information.
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MECHANICALLY STABILIZED EARTH (MSE) SYSTEMS / PRODUCT GUIDE | 2016-11
PROD-C03-G01-PG-E-2016-11