Geotehnical Investigation Report · OPW22/0140

                                            PROPOSED UNIT DEVELOPMENT
                                            37 BOTTLEBRUSH AVENUE, NOOSA HEADS

Table of Contents
1.0   INTRODUCTION ........................................................................................................................................................ 1

2.0   PROPOSED DEVELOPMENT ................................................................................................................................... 1

3.0   METHOD OF INVESTIGATION ................................................................................................................................. 2

4.0   RESULTS OF INVESTIGATION ................................................................................................................................ 2

      4.1         Site Description............................................................................................................................................. 2

      4.2         Topography................................................................................................................................................... 4

      4.3         Geology ........................................................................................................................................................ 5

      4.4         Subsurface Conditions.................................................................................................................................. 5

      4.5         Groundwater ................................................................................................................................................. 6

      4.6         Surface Drainage .......................................................................................................................................... 6

5.0   SLOPE STABILITY ASSESSMENT .......................................................................................................................... 7

      5.1         Existing Conditions ....................................................................................................................................... 7

      5.2         Stability Assessment..................................................................................................................................... 7

      5.2.1            Quantitative Assessment ........................................................................................................................ 8

6.0   GEOTECHNICAL RECOMMENDATIONS .............................................................................................................. 10

      6.1         Development Limitations ............................................................................................................................ 10

      6.2         Earthworks – General ................................................................................................................................. 10

      6.2.1            Site Preparation and Trafficability ......................................................................................................... 10

      6.2.2            Excavations ........................................................................................................................................... 10

      6.2.3            Filling..................................................................................................................................................... 11

      6.3         Building Foundations .................................................................................................................................. 12

      6.3.1            Indicative Site Classification.................................................................................................................. 12

      6.3.2            Footing Design ...................................................................................................................................... 12

      6.4         Temporary and Permanent Retention......................................................................................................... 13

      6.5         Drainage ..................................................................................................................................................... 14

7.0   SUMMARY & CONCLUSIONS................................................................................................................................ 15

8.0   LIMITATIONS .......................................................................................................................................................... 15




13 May 2022
Report No. 22151-001-Rev0                                                              iii