Attachment 5 - Geotechnical Assessment · MCU18/0015

 

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The results of shear strength testing are summarised in the following table:

Table 1: Summary of Shear Strength Testing

 

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BHI SAND (SP) 6 42
(0.8-0.9 m)
BH4A SAND (SP) 11 40
(2.0 m) :
TP9 Silty CLAY (CH) 12 14
(0.6-0.8 m)
Full laboratory reports for the geotechnical testing are presented\in Appendix B.

 

 

 

 

 

 

 

 

 

 

6.0 SLOPE STABILITY ASSESSMENT

A quantitative slope stability assessment has been conducted for the site using the limiting
equilibrium software package SLOPE-W withy input. parameters obtained from the
geotechnical investigation to calculate factors of safety for specific sections of the site. This
information has been used to assess the level of risk and)implications for development.

Two sections (A-A (east) and A=A (west)) based on Section A-A on Figure 2 for the east and
west sides of the creek have been analysed. The following geotechnical parameters were
adopted for the model based on the investigation test results and our experience with similar
materials in the vicinity,

Table 2+ Modelled Geotechnical Parameters

 

    

 

 

 

 

 

 

 

Very Loose Sand 17 0 32
Very Loose Sand + Root 17 2 32
Matter

Loose-Medium Dense 17 0 36
Silty Sand

Dense Silty Sand 18 2 40

Dense-Very Dense 19 5 38
Colluvium

Very Stiff Clay 18 10 32

Diorite - Bedrock . . -

 

 

 

 

 

 

Golder Associates