Geotechnical Investigation

                               PROPOSED CALILE HOTEL NOOSA DEVELOPMENT
                               3 – 7 SERENITY CLOSE, NOOSA HEADS

The analysed profiles represent two critical sections for the proposed development, which cover a section
through the east and west wings, depicted in Section 01 and Section 02 of the provided drawings (Ref.
Richard + Spence Project No. 2100004, Drawing Nos. SD-A-30-01 & 02 G, Rev C, dated 28 July 2022).
Modelling has been carried out for four separate cases, summarised as follows:

       Case 1 – Proposed upslope profile through the west wing.
       Case 2 – Proposed downslope profile through the west wing.
       Case 3 – Proposed upslope profile through the east wing.
       Case 4 – Downslope profile through the east wing.

Commonly adopted industry standards generally require minimum FOS values against slope instability of 1.5
for long-term conditions. Administering authorities such as NC normally require a minimum FOS of 1.5 or
greater for long-term conditions. Results of the stability analyses are presented in Table 4, with the Slope/W
outputs illustrated in Text Figure 11 to 14 on the following pages.
Table 4: Slope/W Analysis Results

   Analysis                                     Description                               Factor of Safety


                  Global instability of the proposed upslope profile through west
 Case 1                                                                                          1.5
                  wing.

                  Global instability of the proposed downslope profile through west
 Case 2           wing. Retaining wall supported on piles being 3 m in length with a             1.7
                  nominal 50 kN/m shear force resistance (unfactored).

                  Global instability of the proposed upslope profile through the east
 Case 3                                                                                          1.5
                  wing.

                  Global instability of the proposed downslope profile through the
 Case 4                                                                                          2.5
                  east wing.




Text Figure 11: Slope/W output for long term conditions – Case 1



7 October 2022
Report No. 22239-001-Rev0                                 11