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case history
A retaining wall structure for filling and levelling the site for the construction of a warehouse and a distribution centre at Arndell Park, Sydney
PRODUCT   BORAL KEYSTONE
retaining wall system,
TENAX TT SAMP
mono-oriented geogrids
LOCATION   Sydney, 2002
DEVELOPER   Australand, Commercial & Industrial Division
ENGINEER   Connell Wagner
INSTALLATION   UCBC Pty Ltd
PROJECT   Cnr Great Western Hwy & Walter Street, Arndell Park, Sydney

 

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.
 

Warehouse and tank located as close as 1.5m from retaining wall
Warehouse and tank located as close as 1.5m from retaining wall


View of completed parking area
View of completed parking area

 

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.
     
Corner detail
Corner detail		   External view of completed TENAX TT geogrid reinforced soil wall
External view of completed TENAX TT geogrid reinforced soil wall
                     
BORAL CLAY & CONCRETE
 

BORAL CLAY & CONCRETE
A Boral Keystone® Retaining Wall System maximises the useful land area for this warehouse site. The vertical wall was constructed along the boundary to provide a cost effective retaining structure for filling and levelling of the site.
http:// www.boralbricks.com.au
 
Products Used:   BORAL Keystone® Retaining Wall System with
TENAX TT SAMP mono-oriented geogrids for Soil Reinforcement
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)

 

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.
 
PRODUCTS
TENAX TT SAMP
 
APPLCIATIONS
Construction of retaining walls
Slope crest enlargement
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