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A retaining wall structure for filling and levelling the site for the construction of a warehouse and a distribution centre at Arndell Park, Sydney
| CASE HISTORY | |
 Warehouse and tank located as close as 1.5m from retaining wall |
|
| Product | BORAL KEYSTONE retaining wall system, |
| Location | Sydney, Australia 2002 |
| Developer | Australand, Commercial & Industrial Division |
| Engineer | Connell Wagner |
| Installation | UCBC Pty Ltd |
| Project | Cnr Great Western Hwy & Walter Street, Arndell Park, Sydney |
 View of completed parking area  External view of completed TENAX TT geogrid reinforced soil wall  Corner detail |
|
Problem
The development site chosen for this warehouse and distribution
centre had a natural fall of 7 metres over the length of the
property.
One boundary also ran alongside an old creek bed.
In order to maximise the usable land area, a retaining wall
would be required around the property boundary to allow filling
and levelling of the site.
Solution
Poor foundation material along the creek bed was removed and replaced
with compacted crushed sandstone to improve the bearing capacity.
The Keystone® Retaining Wall System was then constructed on
the improved compacted foundation to a maximum height of 7 metres.
Geogrid soil-reinforcement layers were incorporated and compacted
in the backfill zone to attain the design live load capacity of
25kPa, and the design dead load capacity of 10kPa.
The high loadbearing
capacity of the Keystone® Retaining Wall System enabled the
construction of the warehouse to be as close as 1.5 metres from
the retaining wall.
| Products Used: | BORAL Keystone® Retaining Wall
System with  TENAX TT SAMP mono-oriented geogrids |
||
| Block: | Splitface | ||
| Colour: | Natural | ||
| Area: | 1,200 m2 | ||
| Maximum Wall Height: | 7 metres | ||
| Rate of Construction: | 60-120m2/day | ||
| Design Live Load (max.): | 25kPa | ||
| Design Dead Load max: | 10kPa | ||
| Retaining Wall Backfill: | Crushed sandstone Ø35° angle of internal friction | ||
 |
BORAL CLAY & CONCRETE |
Conclusions
The Boral Keystone® Retaining Wall System was chosen as the
most cost effective solution for this situation. It offered rapid
construction of a vertical wall with minimal foundation preparation
along the old creek bed, and could be easily engineered to accommodate
the intended loads from the warehouse structure, storage tank and
heavy container trucks.
Applications
Construction of retaining walls