Appendix B- Geotechnical Investigation

Project No. 1
            115-17158
April, 2015
Ref: 1-17158,, 2015-04-08, BR VE
                               ER 1                                                                                      Page
                                                                                                                         P    | 10
John Jamies son – GEOTECHNIC   CAL INVESTIGATION
                                               N - Proposed Resid
                                                                dence, 38 Park Cres
                                                                                  scent, Sunshine Bea
                                                                                                    ach




TABLE
    E3                 RET
                         TAINING WALL
                                 W    DESIG
                                          GN PARAM
                                                 METERS
                                             Density
                                             D                       Earth Pre
                                                                             essure Coeffficient                Long Term Drained Ø
             Material
                                              kN/m3)
                                             (k                       Ka         Ko           Kp                     (degrrees)
          Fill 2                                17                   0.27       0.43         3.70                       355
Very Loo
       ose to Loose
                  e Sand                        17                   0.36       0.53         2.70                       288
  Mediuum Dense Sand                            18                   0.29       0.46         3.40                       333
      D
      Dense Sand                                19                   0.27       0.43         3.70                       355
Notes:-
    1. If fill is compa
                      acted against a retaining wa all the actual earth pressure could exceedd the vertical pressure
                                                                                                            p        (ie.
        Ka > 1.0).
    2. Infers granula ar free draining
                                     g material placced behind the e retaining wa
                                                                                all as a drainagge layer.




                                     NGULAR DISTRIBU
                                 TRIAN      D      UTION
                               Lateral Ea
                                        arth Pressu
                                                  ure                                       Laterral Pressurre Due to Surcharge
                                                                                                                      S




                                                                                         +                      +
                                                                                




                       H
                                            K(H- hw)




                                 hw
                                                        w w(1-K)
                                                K H + hw
                                    K = app
                                          propriate eartth pressure coefficent
                                                                     c                                    UDL       Point Load
                                                                                                                          L     or
                                    H = Verrtical height of
                                                         o the wall                                                 Strip Footing
                                                                                                                          F
                                    hw = Height of desig gn water tablle
                                     = Soil bulk densityy (kN/m3)
                                    w = Water
                                         W        bulk density (kN/m3)
                                                                                                                    FIGUR
                                                                                                                        RE 2 3
                                                                                                                     FIGU
                                                                                                                        URE



6.0      SLOPE STA
                 ABILITY AS
                          SSESSMEN
                                 NT

    6.1 General

The No oosa Counccils ‘Easterrn Beachess Natural Hazard:
                                                       H         Lan
                                                                   ndslide andd Flooding Overlay
(Map OOM 4.3), indicates this site
                              s is withinn a Landslid   de Hazard Area.
                                                                   A     Refer Figure 3 be elow. As
such, an assessme ent of the overall stabillity of the site and surro
                                                                    ounds has bbeen carried out by
an expeerienced Geeotechnical Engineer a at the same time as the   e geotechniccal investigation.