Geosynthetics April/May 2020 - 29

wall reinforcement is connected to the
face by looping the reinforcement through
the connector such that the movement
of one reinforcement affects the other as
in a pulley system. The tensile breakage
calculated in the design assumes that the
strength of the pair of strips is equal to
twice the strength of the strip itself. To
achieve this concentric loading, all the
slack is removed from the reinforcement
during construction as described below.

Construction
Installation method
The facing panel is cast off-site in a precast
facility with in-house quality-control measures. A typical facing panel consists of four
omega-shaped connector inserts embedded in the panel, as shown in Figure 5. The
openings for the geosynthetic strip recess
are covered with tape and caps to prevent
concrete, dirt and water from entering the
recess during precasting and storage.
An unreinforced concrete leveling pad
is poured to ensure even panel placement.
Facing panels are set at a slight batter
toward the backfill. A batter of 1.5 inches
(38 mm) over 5 feet (1.5 m) is generally
used as a starting point. Coarse backfill
such as crushed stone may require less
batter, as was done on this project. If
finer backfill such as sand is used, more
batter may be required. The wall batter

is monitored and adjusted according to
field conditions.
The geosynthetic strip is threaded
through the recess opening cast in the
back of the precast facing panel after the
panels are set in the wall. The opening is
protected during precast operations by a
removable cap. The geosynthetic strip is
unrolled in the field and cut to twice the
reinforced length shown in the design plus
3.3 feet (1 m) to account for the length
inside the recess. Each geosynthetic strip
is pulled through the connection to form
two parallel equal-length reinforcing strips
extending into the MSE fill zone perpendicular to the facing panel (Figure 6).
Tensioning the geosynthetic strip is
very important to maintain wall alignment. Before backfilling, the geosynthetic
strip is anchored by securing the strip free
end with a trench, nail, staple or soil pile.

FIGURE 6 Geosynthetic strip pulled
through facing panel

MSE backfill
The geosynthetic strip MSE wall consists
of compacted select granular backfill
interlayered with geosynthetic reinforcing strips that are connected to facing
elements. The structure relies on the
interaction between the frictional soil,
as the geosynthetic strip resists stresses
produced within the soil mass. This composite mass retains compacted random
backfill beyond the reinforced zone. The

FIGURE 5 Typical precast facing panel, connector insert and geosynthetic strip
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Geosynthetics April/May 2020

Table of Contents for the Digital Edition of Geosynthetics April/May 2020

Geosynthetics April/May 2020 - Cover1
Geosynthetics April/May 2020 - Cover2
Geosynthetics April/May 2020 - 1
Geosynthetics April/May 2020 - 2
Geosynthetics April/May 2020 - 3
Geosynthetics April/May 2020 - 4
Geosynthetics April/May 2020 - 5
Geosynthetics April/May 2020 - 6
Geosynthetics April/May 2020 - 7
Geosynthetics April/May 2020 - 8
Geosynthetics April/May 2020 - 9
Geosynthetics April/May 2020 - 10
Geosynthetics April/May 2020 - 11
Geosynthetics April/May 2020 - 12
Geosynthetics April/May 2020 - 13
Geosynthetics April/May 2020 - 14
Geosynthetics April/May 2020 - 15
Geosynthetics April/May 2020 - 16
Geosynthetics April/May 2020 - 17
Geosynthetics April/May 2020 - 18
Geosynthetics April/May 2020 - 19
Geosynthetics April/May 2020 - 20
Geosynthetics April/May 2020 - 21
Geosynthetics April/May 2020 - 22
Geosynthetics April/May 2020 - 23
Geosynthetics April/May 2020 - 24
Geosynthetics April/May 2020 - 25
Geosynthetics April/May 2020 - 26
Geosynthetics April/May 2020 - 27
Geosynthetics April/May 2020 - 28
Geosynthetics April/May 2020 - 29
Geosynthetics April/May 2020 - 30
Geosynthetics April/May 2020 - 31
Geosynthetics April/May 2020 - 32
Geosynthetics April/May 2020 - 33
Geosynthetics April/May 2020 - 34
Geosynthetics April/May 2020 - 35
Geosynthetics April/May 2020 - 36
Geosynthetics April/May 2020 - 37
Geosynthetics April/May 2020 - 38
Geosynthetics April/May 2020 - 39
Geosynthetics April/May 2020 - 40
Geosynthetics April/May 2020 - 41
Geosynthetics April/May 2020 - 42
Geosynthetics April/May 2020 - 43
Geosynthetics April/May 2020 - 44
Geosynthetics April/May 2020 - 45
Geosynthetics April/May 2020 - 46
Geosynthetics April/May 2020 - 47
Geosynthetics April/May 2020 - 48
Geosynthetics April/May 2020 - 49
Geosynthetics April/May 2020 - 50
Geosynthetics April/May 2020 - 51
Geosynthetics April/May 2020 - 52
Geosynthetics April/May 2020 - 53
Geosynthetics April/May 2020 - 54
Geosynthetics April/May 2020 - 55
Geosynthetics April/May 2020 - 56
Geosynthetics April/May 2020 - 57
Geosynthetics April/May 2020 - 58
Geosynthetics April/May 2020 - 59
Geosynthetics April/May 2020 - 60
Geosynthetics April/May 2020 - Cover3
Geosynthetics April/May 2020 - Cover4
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-october-november-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-july-august-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-case-studies-guide-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-april-may-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-february-march-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-december-2023-january-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-october-november-2023
https://www.nxtbook.com/ata/geosynthetics/geoysynthetics-august-september-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-june-july-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-april-may-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-february-march-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-december-2022-january-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-october-november-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-december-2021-january-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-october-november-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2021
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https://www.nxtbook.com/ifai/geosynthetics/1020GS
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