08/1787 - Response to Information Request [As Published] · 132008.1787

 

 

 

Seahaven Development Pty Ltd- 9-19 Hastings Street Noosa QLD 4567 : 14
Figure 2.6.31, Structural cells. THON, oe
a. Detail. soils,
The

4.3.2, Wa

Y, Starctural calls fillod with soil sudable iar trees,

     
 

  

   
 

 

Leave air space above sai anc! del cell deck, rests ©

2. Apprepate sub base wilh dram line anel ty

3. Gooprid curtain and compacted backfill alone dent 0}

aQuier perimeter of cells. quiren

4, Gootextiie on top af coll deck. Wons.

5. Aapre no COSA dad paving. Hines 1

b. Structural-cell frames can be stacked ip to tires beyond
Javers higtlt.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Diagram No 2- showing typical design of structural cells on a site (Urban
2008, page 308). Note design may change based on site, design constraints
and subsoil types.

   
  

 

1 agemicnt: Under Pavement
“urban areas is'a litniting factor when it comes to water
ration inihe root zones of trees. The run off caused by hard impenetrable
surfaces éreates many problems for engineers in the form of stormwater. Ifa
tree has its roots and surrounding soil covered by hard surface that prevents
water penetration, then irrigation or the artificial supply of water to the roots
needs to be addressed.

Two methods are available to improve water penetration into the root zone and

soil surrounding a tree, with the added benefit of reducing stormwater runoff.

All systems have constraints (eg sediment) that need addressing in the design

stage.

1) Porous Paving- is a pavement type that allows water to penetrate into the
soil underneath (sec Diagram No 3). Porous concrete is a particularly
good method that is rarely used in Australia, but is detailed in the book
Porous Pavements by Bruce K Ferguson (USA).

2) Water Harvesting- is the use of surface drains to catch and funnel surface
runoff in the soit underneath (see Diagram No 4). This system is
particularly symbiotic with structural cells used to increase soil volumes.

 

Leaf and Limb Horticultural ConsultancyO
Preparéd by Samuel! Cowie 29" of January 2009

 

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