Geotech Report - techtonic · RAL22/0021

                                            PROPOSED RESIDENTIAL DEVELOPMENT
                                            39 PICTURE POINT CRESCENT, 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

      4.7         Vegetation .................................................................................................................................................... 7

      4.8         Buildings and Other Structures ..................................................................................................................... 7

5.0   SLOPE STABILITY ASSESSMENT .......................................................................................................................... 8

      5.1         Existing Conditions ....................................................................................................................................... 8

      5.2         Stability Assessment..................................................................................................................................... 9

6.0   GEOTECHNICAL RECOMMENDATIONS .............................................................................................................. 11

      6.1         Development Limitations & Stability Discussion ......................................................................................... 11

      6.2         Earthworks .................................................................................................................................................. 12

      6.2.1            Site Preparation and Trafficability ......................................................................................................... 12

      6.2.2            Excavations ........................................................................................................................................... 13

      6.2.3            Filling..................................................................................................................................................... 13

      6.3         Building Foundations .................................................................................................................................. 14

      6.3.1            Indicative Site Classification.................................................................................................................. 14

      6.3.2            Footing Design ...................................................................................................................................... 14

      6.4         Temporary and Permanent Retention......................................................................................................... 15

      6.5         Drainage ..................................................................................................................................................... 16

7.0   SUMMARY & CONCLUSIONS................................................................................................................................ 17

8.0   LIMITATIONS .......................................................................................................................................................... 17




10 February 2023
Report No. 22511-001-Rev0                                                              iii