Geosynthetics October/November 2020 - 23

The geomembrane was then cut
along the edges of the excavation,
removed and flipped over. A grid of
holes from the geomembrane bottom
spikes was readily apparent in the subgrade, as was a scattering of No. 57
aggregate and one medium-sized stone
(Figure 3 on page 21), which accounted
for the depressions in the geomembrane.
The medium-sized subgrade stone had
subrounded corners. The No. 57 stones
were angular but were pushed about
halfway into the subgrade. The underside of the geomembrane had obvious
depressions where it had been over
the subgrade stones, but there were no
scratches or other signs of geomembrane
damage (Figure 4).

Subarea F excavation
The exhumation of Subarea F proceeded
in a similar manner. The goal at this location was to examine the geosynthetics in
the path of the tires where the loaded haul
truck had made 100 passes in 2016. The
2018 Subarea F excavation was 6.7 feet (2.0
m) × 11.5 feet (3.5 m). Again, the area was
excavated partway down with the excavator; then the general depth of geotextile
was located by hand shoveling. Note that
the location of the 2016 geotextile patch in
Subarea F had previously been exhumed
(after trafficking) and re-covered with soil
in 2016. Two large rocks were found close
to, but not directly on, the geotextile. The
cover soil was again predominately soil
but had more large rocks than the cover

The geomembrane
was then cut along the
edges of the excavation,
removed and flipped
over. A grid of holes
from the geomembrane
bottom spikes was
readily apparent in
the subgrade, as was
a scattering of No. 57
aggregate and one
medium-sized stone.

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www.GeosyntheticsMagazine.com

1020GS_p18-25.indd 23

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9/22/20 12:52 AM


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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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