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Geogrid Installation on Curved Walls
- Geogrid is installed in layers as the wall is constructed.
The Geogrid Design Tables located on pages 20 to 25 specify
the layers where geogrid should be placed.
- The installation of geogrid on curved walls usually
requires that two levels of geogrid be installed: the
main geogrid is installed at the specified layer shown
in the different Design Tables (level "A").
The supplementary overlapping geogrid is installed in
the next course (level "B").
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For Radius Less than 50 Feet
- Place the main geogrid at the layers specified in the tables
as shown below. The layers in the tables are for Level "A".
Note the direction of the geogrid's reinforcement. In the next
course, install Level "B" geogrid with the reinforcement running
90° to the direction of reinforcement in Level "A".
(The red dashed box indicates where Level "B" will be placed
in the next course of units.)
For a concave turn, place geogrid in Level "A" (shown as
solid lines). For Level "B" (shown in red dashed lines), place
the geogrid in the next course in a manner to reinforce gaps
left by the previous layer of geogrid.
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For Radius More than 50 Feet
- For a convex turn, the geogrid will overlap as shown below.
Geogrid is installed on the specified layer, with no Level
"B" required. Place a minimum of 3" of soil between the geogrid
where the geogrid overlaps.
- For a concave turn, place geogrid in Level "A" (shown as solid
lines). For Level "B" (shown in red dashed lines), place the
geogrid in the next course in a manner to reinforce gaps left
by the previous layerof geogrid. The minimum width of geogrid
to cover the space shall be equal to 3 times the space width.
Additional geogrid not required when the space is less than
1'.
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