Geosynthetics October/November 2020 - 32

A geosynthetic wrap-face vegetated wall system

FIGURE 5 Initial placement of geogrid and first lift of GWFV wall

FIGURE 6 Completed first lift (wrapped layer) of GWFV wall

32

with paint lines along the ground. Then
a base geogrid layer was laid out, with a
length prescribed according to the wall
design specifications. If necessary to
keep the geogrid flat, stakes were driven
through it after stretching it taut in its
position. A thin layer of structural fill
soil was spread across the geogrid, and
the first HPTRM wrap was moved into
position with the face braces already
installed (Figure 5). The face of the lift
was positioned along the painted toeline, then staked in position along the
front and back of the base layer, using a
stake about every 6 to 8 feet (1.8 to 2.4
m) along the fabric length. The local
area around braces was backfilled first
to hold them down and to keep them
vertical, followed by filling across the
entire width of the wrap. Compaction
of the first 6-inch (15.2-cm) soil lift was
accomplished using a walk-behind plate
compactor near the face and a large
vibratory roller at distances farther than
2.5 feet (0.8 m) from the face.
A second lift of soil was then added
to fill up the remaining wrap height and
was likewise compacted; topsoil was used
directly behind the face fabric (about
0.8-foot [0.25-m] thick), with structural
fill comprising all the remaining backfill.
A prescribed grass-seed mix was scattered along the edge of the topsoil at the
face; then the upper flap of the HPTRM
wrap lift was pulled back over the soil
infill and stretched taut and staked. This
completed the initial wrap lift along the
base of the wall, as shown by the example
in Figure 6.
The toe-line of the next lift was surveyed (located using a high-resolution
GPS) and again marked with paint, this
time along the top of the completed wrap
lift. In regard to maintaining elevation
grade, the slight bulging in the face wrap
resulted in the actual lift height being
slightly less than 1 foot (0.3 m), meaning
that the thin layer of soil spread across

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Geosynthetics October/November 2020

Table of Contents for the Digital Edition of Geosynthetics October/November 2020

Geosynthetics October/November 2020 - Cover1
Geosynthetics October/November 2020 - Cover2
Geosynthetics October/November 2020 - 1
Geosynthetics October/November 2020 - 2
Geosynthetics October/November 2020 - 3
Geosynthetics October/November 2020 - 4
Geosynthetics October/November 2020 - 5
Geosynthetics October/November 2020 - 6
Geosynthetics October/November 2020 - 7
Geosynthetics October/November 2020 - 8
Geosynthetics October/November 2020 - 9
Geosynthetics October/November 2020 - 10
Geosynthetics October/November 2020 - 11
Geosynthetics October/November 2020 - 12
Geosynthetics October/November 2020 - 13
Geosynthetics October/November 2020 - 14
Geosynthetics October/November 2020 - 15
Geosynthetics October/November 2020 - 16
Geosynthetics October/November 2020 - 17
Geosynthetics October/November 2020 - 18
Geosynthetics October/November 2020 - 19
Geosynthetics October/November 2020 - 20
Geosynthetics October/November 2020 - 21
Geosynthetics October/November 2020 - 22
Geosynthetics October/November 2020 - 23
Geosynthetics October/November 2020 - 24
Geosynthetics October/November 2020 - 25
Geosynthetics October/November 2020 - 26
Geosynthetics October/November 2020 - 27
Geosynthetics October/November 2020 - 28
Geosynthetics October/November 2020 - 29
Geosynthetics October/November 2020 - 30
Geosynthetics October/November 2020 - 31
Geosynthetics October/November 2020 - 32
Geosynthetics October/November 2020 - 33
Geosynthetics October/November 2020 - 34
Geosynthetics October/November 2020 - 35
Geosynthetics October/November 2020 - 36
Geosynthetics October/November 2020 - 37
Geosynthetics October/November 2020 - 38
Geosynthetics October/November 2020 - 39
Geosynthetics October/November 2020 - 40
Geosynthetics October/November 2020 - 41
Geosynthetics October/November 2020 - 42
Geosynthetics October/November 2020 - 43
Geosynthetics October/November 2020 - 44
Geosynthetics October/November 2020 - 45
Geosynthetics October/November 2020 - 46
Geosynthetics October/November 2020 - 47
Geosynthetics October/November 2020 - 48
Geosynthetics October/November 2020 - Cover3
Geosynthetics October/November 2020 - Cover4
Geosynthetics October/November 2020 - Geosynthetics Conf. Brochure 1
Geosynthetics October/November 2020 - Geosynthetics Conf. Brochure 2
Geosynthetics October/November 2020 - Geosynthetics Conf. Brochure 3
Geosynthetics October/November 2020 - Geosynthetics Conf. Brochure 4
Geosynthetics October/November 2020 - Geosynthetics Conf. Brochure 5
Geosynthetics October/November 2020 - Geosynthetics Conf. Brochure 6
Geosynthetics October/November 2020 - Geosynthetics Conf. Brochure 7
Geosynthetics October/November 2020 - Geosynthetics Conf. Brochure 8
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https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2021
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https://www.nxtbook.com/ifai/geosynthetics/0618GS
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