Appendix B- Geotechnical Investigation

Project No. 1
            115-17158
April, 2015
Ref: 1-17158,, 2015-04-08, BR VE
                               ER 1                                                                       Page
                                                                                                          P    |6
John Jamies son – GEOTECHNIC   CAL INVESTIGATION
                                               N - Proposed Resid
                                                                dence, 38 Park Cres
                                                                                  scent, Sunshine Bea
                                                                                                    ach




5.0      ENGINEERING ASSES
                         SSMENT

    5.1 Traffickabiility

Due to the steep nature of the
                             e site traffickkability characteristics are consideered to be poor.
                                                                                           p

Potentiial trafficka          blems with this site should not be
                   ability prob                               b underesstimated. The
                                                                                   T site
will verry quickly become untraffickab
                              u          ble if appro
                                                    opriate see
                                                              epage and d drainage control
measures, along with cons     struction p ractices ap
                                                    ppropriate for site co
                                                                         onditions, are not
maintained.

The co  ontractor shhould fully inform hi mself of the ground conditionss on site prior to
comme  encement of o earthworks. This requiremen             b explicit in any earrthworks
                                                   nt should be
specificcations or co
                    ontract.

    5.2 Earthwork
                ks

It is und
        derstood thhat earthworks will com                     an 2.0m in height. No filling is
                                         mprise cuts of less tha
expecte ed and is no
                   ot recommeended due too the steep nature of th
                                                                he site.

           5.2.1       Exc
                         cavation Su
                                   upport

The upper level ve ery loose sa and soils ha
                                           ave the pottential to “collapse/fail”” unexpecte
                                                                                          edly in a
       ng situation
trenchin           n, particularrly where sseepage is encountere   ed. Excavvations on this site
should be conside   ered unstable; shorin g of any excavations
                                                     e            s is recomm   mended. Suitable
precauttions to satisfy Health & Safety reqquirements must be ad  dopted.

It is re
       ecommende
               ed that a suitable ssheet pile system be
                                                      e considereed to supp
                                                                          port the
excavattions.

    5.3 Site Classiification

Consideering the proposed
                 p        developmen
                          d            nt and site investigation results,, the site may be
designa
      ated Class 'A'
                 ' (non rea
                          active) in acccordance with
                                                 w AS2870    0-2011 ‘Ressidential Slabs and
Footing
      gs’.

    5.4 Building Foundation
                 F         s

           5.4.1       Gen
                         neral

Shallow
      w foundationns are not recommend   ded for the propsed sttructure at tthis site due to the
steep nature of the
                  e site and ve
                              ery loose to
                                         o loose dens
                                                    sity of the upper
                                                                u     level ssands.

Low be earing presssures and settlementss exceeding 20mm co      ould be exxpected for shallow
footingss founded in the veryy loose/loosse sands. Settlement
                                                     S            may occurr immediate ely upon
construction due to
                  t the appliied load, bu ut also in the
                                                     t   long terrm due to nnatural vibrration or
water innduced setttlement of the
                              t sands. It is recom  mmended that all foottings and slab on
ground d floors be suspended  d on deep ffoundation  ns.