Geotechnical Report

                                                                       METHOD OF SOIL DESCRIPTION
                                                            USED ON BOREHOLE AND TEST PIT REPORTS
                 FILL                                                                                                               CLAY (CL, CI or CH)


                 GRAVEL (GP or GW)                                                                                                  ORGANIC SOILS (OL or OH or Pt)


                 SAND (SP or SW)                                                                                                    COBBLES or BOULDERS


                 SILT (ML or MH)


Combinations of these basic symbols may be used to indicate mixed materials such as sandy clay.
CLASSIFICATION AND INFERRED STRATIGRAPHY
Soil and Rock is classified and described in Reports of Boreholes and Test Pits using the preferred method given in
AS1726 – 1993, (Amdt1 – 1994 and Amdt2 – 1994), Appendix A. The material properties are assessed in the field by
visual/tactile methods.
                             Particle Size                                                                                               Plasticity Properties

  Major Division        Sub Division            Particle Size                                      40
              BOULDERS                            > 200 mm                                                                                                                 CH
                                                                                                                                                           CI         High plasticity
               COBBLES                          63 to 200 mm                                       30
                                                                                                                                CL
                                                                                                                                                        Medium             clay
                                                                                                                            Low plasticity
                                                                            Plasticity Index (%)




                                                                                                                                clay                    plasticity
                        Coarse                   20 to 63 mm                                                                                              clay

   GRAVEL               Medium                  6.0 to 20 mm
                                                                                                   20
                                                                                                                                                                                OH or MH
                          Fine                  2.0 to 6.0 mm                                                                                                                 High liquid limit
                                                                                                                                                                                     silt
                        Coarse                  0.6 to 2.0 mm
                                                                                                   10                                                   OL or ML
    SAND                Medium                  0.2 to 0.6 mm                                                                                           Low liquid
                                                                                                                  CL/ML Clay/Silt                        limit silt
                          Fine                0.075 to 0.2 mm                                                OL or ML - Low liquid limit silt

                  SILT                       0.002 to 0.075 mm                                     0
                                                                                                        0            10             20          30      40       50            60            70         80
                  CLAY                           < 0.002 mm                                                                                       Liquid Lim it (%)



 MOISTURE CONDITION                                                                                     AS1726 - 1993
 Symbol              Term           Description
      D                Dry          Sands and gravels are free flowing. Clays & Silts may be brittle or friable and powdery.
      M              Moist          Soils are darker than in the dry condition & may feel cool. Sands and gravels tend to cohere.
     W                Wet           Soils exude free water. Sands and gravels tend to cohere.

 CONSISTENCY AND DENSITY                                                                             AS1726 - 1993
  Symbol                Term                 Undrained Shear                                       Symbol       Term                                    Density Index %                     SPT “N” #
                                                Strength
     VS              Very Soft                  0 to 12 kPa                                             VL                  Very Loose                    Less than 15                             0 to 4
      S                  Soft                   12 to 25 kPa                                            L                        Loose                         15 to 35                           4 to 10
      F                  Firm                   25 to 50 kPa                                            MD              Medium Dense                           35 to 65                       10 to 30
     St                  Stiff                 50 to 100 kPa                                            D                        Dense                         65 to 85                       30 to 50
    VSt              Very Stiff               100 to 200 kPa                                            VD                  Very Dense                       Above 85                        Above 50
     H           Hard              Above 200 kPa
In the absence of test results, consistency and density may be assessed from correlations with the observed behaviour of
the material.
# SPT correlations are not stated in AS1726 – 1993, and may be subject to corrections for overburden pressure and
equipment type.



Explanation of Notes, Abbreviations & Terms Used on Borehole and Test Pit Reports                                                                                                           Date: 08/10/2015
FRM-068                                                                                                                                                                                     Ver. 1.01