Geotechnical Report

 J000206-001-R-Rev0                                                                                       April 2016

All existing and proposed footings should found such that they are not adversely affected by any adjacent
excavations, batter slopes, trenches, or retaining walls that are not designed to support building or fill loads.
To minimise the potential for any adverse interaction effects, footings should found at least below a plane
extending 1 m horizontally from the base of trenches/batter slopes/excavations/ retaining walls, then rising
up at 1V:1H. This requirement is illustrated in the following diagram.




          Pavement design parameters (CBR values)
Laboratory CBR testing on the clay subgrade materials returned CBR values of 5 % to 9 %.
Therefore, based on our experience with similar materials, we recommend that preliminary pavement design
should be based on a CBR value of 5 % for the natural clayey soils.
Design parameters for pavements will be dependent upon the subgrade materials present after earthworks
and the type, depth and quality of any fill used to bring the site to design levels. Further subgrade evaluation
should be undertaken during the construction stage.
Perimeter, subsurface cut-off drains should be installed adjacent to any sealed pavements in order to
intercept and divert subsurface seepage.

7.0     ACID SULFATE SOILS ASSESSMENT
The proposed development area is shown on the Queensland Government 1:100,000 Acid Sulfate Hazard
map (Redcliffe to Teewah, Map 2, 2002) as being on the border of “not assessed” and “acid sulfate on
disturbed land”.




                                                                               Indicative site location




Plate 2 – QLD Government ASS Redcliffe to Teewah map clipping (1:100,000)




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