Attachment C - Soil Survey Report · MCU18/0013

Project No. 1-20119                                                                                                        Page | 19
March, 2018
Ref: 1-20119, 2018-03-02, BR VER 2
Sam Hopper – Slope Stability Assessment and Geotechnical Report - Proposed Residence, 24 Arakon Crescent, Sunshine Beach




Given no structural filling is a currently proposed, no further specific earthworks
recommendation will be provided. The author can be contacted if further information is required.

           7.1.3       Batters

It is understood that all cuts will be supported by temporary and later permanent retaining walls
with no requirements currently for batters on the site. Should batter angles be required, please
contact to author to discuss their use.

    7.2 Building Foundations

           7.2.1       General

Given the subsurface profile encountered, the expected loads and likely excavation depths, a
high level strip and pad footing system may be possible to be adopted for the proposed
development provided all footings are founded into at least medium dense sand and the
presence of loose sand is taken into account. Deep foundations could also be adopted as an
alternative foundation system and/or for retention systems.

           7.2.2       Site Classification as per AS 2870-2011

General

A site classification, in accordance with AS 2870 'Residential Slabs and Footings' (it is
recommended that the reader satisfy themselves that the use of AS 2870 is applicable for the
proposed design) has been carried out with the following information:-

          Subsurface profile:
                      Possible minor fill
                      Residual sand soils
          Proposed earthworks:
                      Cuts of up to approx. 4.0m to 5.0m with minor filling (< 0.5m if any)
          Soil Moisture Model:
                      A zone of moisture variation of 1.5m
                      A crack zone of 0.75m
                      pF = 1.2

Site Classification

According to AS 2870-2011, the site has been designated Class 'P' due to:-

          The potential presence of uncontrolled fill in excess of 0.4m in depth as defined in AS
           2870-2011 Clause 2.5.3;
          The site being potentially subject to other factors resulting in foundation movement
           beyond the reactive soil movements resulting from moisture changes due to the normal
           site conditions described in AS 2870-2011 Clause 1.3.2 (i.e. Clause 1.3.3 abnormal
           moisture conditions).
          The site being potentially subject to landslip.