|
|
Formation levels are prepared and a concrete strip foundation
is laid for the first course of facing panels. Fill material
is placed and compacted behind the facing, and a single
course of base units should be bedded on mortar to the
correct line and level. |
|
|
|
|
|
|
Place the prepared end of the grid over the rebate in
the block and locate the connectors around the transverse
bar. Ensure that each aperture of the geogrid is covered
by a connector. |
|
|
|
|
|
|
Position the assembly neatly into the rebate with the
trimmed ribs towards the face. Repeat this procedure for
the whole course ensuring that adjacent lengths of grid
are abutted at the wall face. Fill material is placed
and compacted to specified heights, particular care being
taken to ensure that the geogrids are adequately tensioned.
|
|
|
|
|
|
|
Fill is placed to a depth not less than 150mm before
each pass of the compaction plant.
Fill should be placed by plant such as an excavator bucket
or dozer with an opening bucket, which causes the fill
to cascade onto the grids. |
|
|
|
|
|
|
Compaction should always commence nearest the facing
units, working away toward the free end of the grid. No
traffic or site plant shall be permitted to travel directly
on the grids. |
|
|
|
|
|
|
In order to achieve good line and level, the coping
units should be bedded on mortar. When alignment of the
wall is curved or angled, the coping units require cutting
on site to achieve best fit. |
|