07/1571 - Response to Information Request [As Published] · 142007.1571

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Project 305-2325

 

February, 2006 . 7 we oe Page 7

 

6.0 ENGINEERING ASSESSMENT
6&1 Iraffickability and Site Preparation

The fieldwork for this investigation which required site access along the beach was
carried out using a track mounted Hydrapower drilling rig, therefore no problems were
encountered over the loose sands on the site. A truck mounted drilling rig was utilised for
the borehole located in the front eastern carpark.

It is recommended that the exposed surface in the construction area be proof rolled to
delineate loose areas and improve traffickability.

The use of a sub-base gravel overlay (MRS 11.05, Subtype 2.3, B or C Grading/150mm
nominal layer thickness) should also be considered in vehicle access areas to improve
general traffickability during construction. Use of tracked equipment may be necessary for
traffickability on the sand subgrade.

The relevant contractors should therefore fully inform themselves of the ground conditions
on site prior to commencement of earthworks.

§.2 Earthworks

It is understood that the proposed earthworks will consist of excavations to construct
ground floor level at RL 2.0m.

Earthwork procedures should be carried out in a responsible manner in accordance with
AS.3798-1996 "Guidelines on Earthworks for Commercial and Residential
Developments".

6.2.1 Subgrade Preparatio,

Subgrade preparation procedures should include the following:-

* Clearing, stripping and grubbing should be carried out in areas subject to earthworks.
Also all soils containing organic matter should be stripped from the construction area;
this material is not considered suitable for use as structural fill.
* The subgrade should be proof rolled (where appropriate) under the supervision of
Soil Surveys Engineering using a vehicle with a tare of at least 5.tonnes and then
compacted to the required degree.

 

# SOIL SURVEYS ENGINEERING