more resistant to UV degradation and may be exposed
to UV radiation for at least 28 days without damage.
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The geotextile shall be protected during installation from clogging, tears,
and other damage. Damaged geotextile shall be repaired or replaced as
directed. Adequate ballast (e.g. sand bags) shall be used to prevent
uplift by wind. The geotextile shall not be left uncovered for more than
[14] [_____] days after installation.
3.5
REPAIRS
Torn or damaged geotextile shall be repaired. Clogged areas of geotextile
shall be removed. Repairs shall be performed by placing a patch of the
same type of geotextile over the damaged area. The patch shall extend a
minimum of 300 mm 12 inches beyond the edge of the damaged area. Patches
shall be continuously fastened using approved methods. The machine
direction of the patch shall be aligned with the machine direction of the
geotextile being repaired. Geotextile rolls which cannot be repaired shall
be removed and replaced. Repairs shall be performed at no additional cost
to the Government
3.6
PENETRATIONS
Engineered penetrations of the geotextile shall be constructed [as shown on
the drawings] [by methods recommended by the geotextile manufacturer].
3.7
COVERING
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NOTE: This paragraph should be modified if the
geotextile will be covered by another geosynthetic
layer.
If large stones or riprap will be placed over the
geotextile, the drop height of the stones should be
addressed in the specifications. At some projects,
the Contractor is required to construct a small test
fill to verify his placement techniques will not
damage the geotextile and to determine the maximum
allowable drop height.
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Geotextile shall not be covered prior to inspection and approval by the
Contracting Officer. Cover soil shall be placed in a manner that prevents
soil from entering the geotextile overlap zone, prevents tensile stress
from being mobilized in the geotextile, and prevents wrinkles from folding
over onto themselves. On side slopes, soil backfill shall be placed from
the bottom of the slope upward. Cover soil shall not be dropped onto the
geotextile from a height greater than 1 m 3 feet. No equipment shall be
operated directly on top of the geotextile without approval of the
Contracting Officer. Equipment with ground pressures less than 50 kPa 7 psi
shall be used to place the first lift over the geotextile. A minimum of
[300][_____] mm [12][_____] inches of soil shall be maintained between
full-scale construction equipment and the geotextile. Cover soil material
type, compaction, and testing requirements are described in Section [_____].
Equipment placing cover soil shall not stop abruptly, make sharp turns,
spin their wheels, or travel at speeds exceeding [2.2] [_____] m/s [5]
[_____] mph.
SECTION 02373
Page 13
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