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Construction of retaining walls for access ways and landscaping on a sloping residential development located in Balmain overlooking Sydney Harbour

 

Construction of retaining walls for access ways and landscaping on a sloping residential development

 

 

PRODUCTS:

TENAX TT mono-oriented geogrids

with Keystone

 

Location

Balmain (Sydney), Australia, 2000

Owner

Australand

Project

ARUP Engineers

Contractor

UCBC Pty. Ltd.

 

 

Problem
The sloping terrain has been benched out to accommodate the residential apartments and townhouse leaving 4 to 5 metre drops from one platform to another sloping down towards the waters edge.

The owner required a flexible, attractive, durable retaining wall system which could utilise the existing site fill and provide access ramps throughout the residential complex.

 

A retaining walls for access ways and landscaping on a sloping residential development

 

 

Solution
Use an attractive cost-effective segmental block system together with TENAX geogrids to reinforce the on-site backfill. This style of retaining wall system allows maximum flexibility with wall design and geometry.

Using TENAX TT geogrids permitted the use of poor quality on-site fill which had to be utilised. This tyle of retaining wall construction suited this sloping terrain which forced the contractor to work under difficult conditions.

 

 

Conclusions
The use of segmental blocks with TENAX TT045/060 geogrids, instead of the other traditional rigid retaining wall systems provided the following benefits:

  • The use of poor on-site backfill to be used
  • Superior construction damage factors versus other geogrids
  • Substantial cost savings versus other rigid methods
  • Quick and simple staged construction: normal machinery and equipment and unskilled labour were utilised
  • Addressed the concerns of the corrosive site conditions
  • A free draining reinforced soil structure
  • Ability to create any combination of wall profiles to satisfy the overall design concept
  • A retaining wall structure which can withstand ground movements and adjust to new condition

 

 

 

 

 

Construction of retaining walls

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