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| Retaining Wall Applications | |
| For most non-critical walls, and under
favorable soil conditions, Nicolock wall units are constructed as a
conventional gravity wall system.
Walls up to 3 feet in height (2' 6" for Sierra) are attainable without
the need of soil reinforcing (Geogrid). |
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Recommended installation procedures should be followed to insure the life of your wall structure. |
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For walls higher than 3 feet, Nicolock wall units will function as a highly effective engineered wall system when used with properly designed and installed GeoGrid soil reinforcing. |
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Top View of GeoGrid Soil Reinforcing Installation. |
| Geogrid |
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| Typically made of polypropylene, Geogrid stabilizes the soil mass behind the retaining wall and ties the wall face to the earth being retained. Height of the wall, soil conditions, and surcharges (i.e., slopes or traffic above the wall) will effect the type, length, and placement of the Geogrid. |
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| Geogrid - Make Retaining Walls Stronger | ||
| #50289 | 6' x 150' | |
| Retaining Wall Installation Guidelines | |
| The following procedures apply to all Nicolock Retaining Wall Units constructed as a conventional Gravity Wall System. | |
| Step 1. Excavate a trench 4" wider than the wall width of the unit being used. Excavate trench to a depth of 6" to 12", depending on height of wall. Compact the soil at the bottom of trench. Shape the slope behind wall to allow for 12" of drainage material. |
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| Step 2. Place filter fabric in trench and up the cut slope. Fill trench with clean, graded aggregate and compact to a depth of 6". |
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| Step 3.
Position a level string line at face of the unit to maintain alignment. Place the wall units side by side in the center of the prepared base. Bury the first coarse of block to a depth equal to 10% of the height of the wall, measured in inches. Level units from side to side, front to back. |
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| Step 4. Fill the space in front of wall with clean fill to grade to hold units from shifting. Place a perforated pipe behind wall on top of base for drainage. Fill drainage area with clean aggregate keeping filter fabric in place. Backfill soil on outer side of fabric and compact. |
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| Step 5. Place successive coursed by fitting the keys and grooves onto the units in the row below. Keep the tops of each course clean to maintain even levels. Stack units in running board (crossing joints) |
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| Step 6. Continue building the wall to the desired height. Backfill with clean aggregate behind each coarse as completed. Backfill and compact soil. Finish the wall by placing the coping stone with a suitable masonry adhesive. |
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or (631) 289-3500. © Copyright 2008 Bissett Nursery Corp.