Development Application Part 2 of 2 Planning report Geotechnical report and plans MCU11/0168 & OPW11/0257

GeoConsulting, Report 015988, July 11                                                                         Page 5
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                                        Table 2 Bearing Capacities at DCP2

                                                                                                            Bearing
   Depth
                          N                 ts '                Cn                   0               Ni     Capacity
      (m)
                                                                                                             (kPa)
      1.0                 2               17.0                 1.60                 25°              3.2      30

      1.5                 3              25.5                  1.46                 25°              4.4      35

      2.0                 6              34.0                   1.36                36°              8.2      100

      2.5                 9              42.5                   1.29                40°              11.6     130

      3.0                 15              51.0                  1.23                46°              18.5     225



                                        Table 3 Bearing Capacities at DCP4

                                                                                                            Bearing
    Depth
                          N                 Q'„                 Cn                   0'              Ni     Capacity
      (m)
                                                                                                             (kPa)
      1.0                  1              17.0                  1.60                25°              1.6      20

      1.5                 3               25.5                  1.46                25°              4.4      35

      2.0                 6              34.0                   1.36                36°              8.2      100

      2.5                 8              42.5                   1.29                43°              10.3     120

      3.0                 15              51.0                  1.23                46°              18.5     225



Notes:
      ♦     N         = Standard Penetration Resistance
      ♦     a',       = Shear stress of the soil (Note: y = 17 kN/m3)
      ♦     Cn        = Correction factor
      ♦     (t'       = Shear strength parameter
      ♦     Ni        = Corrected Penetration Resistance
      ♦     Allowable bearing capacity has been calculated using Ni and a typical footing width of 0.5
            metres.




4.0         LANDSLIDE CHARACTERISATION

4.1         Definition of Landslide
The term landslide is defined as the movement of rock, debris or earth down a slope. The phenomena
described as landslides are not limited to either "land" or to "sliding" and usage of the work has
implied a much more extensive meaning than its component parts suggest.


4.2         Causes of Landslides
Landslides occur when the inherent strength of the soil or weathered rock is no longer sufficient to
resist the forces of gravity acting on the materials. Compared with mountainous areas in other parts of
                                                                                                                       C
the world, the ranges in Southeast Queensland are relatively subdued and mature. In such areas, slopes


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