Attachment 4 - Geotech Report · MCU23/0030

                                            50 NOOSA PARADE, NOOSA HEADS
                                            PROPOSED RESIDENCE



Table of Contents

1.0   INTRODUCTION ........................................................................................................................................................ 1

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

3.0   SITE DESCRIPTION .................................................................................................................................................. 2

4.0   METHOD OF INVESTIGATION ................................................................................................................................. 4

      4.1         Fieldwork ...................................................................................................................................................... 4

      4.2         Geotechnical Laboratory Testing .................................................................................................................. 4

      4.3         Environmental Laboratory Testing ................................................................................................................ 4

5.0   INVESTIGATION FINDINGS ..................................................................................................................................... 5

      5.1         Regional Geology ......................................................................................................................................... 5

      5.2         Subsurface Conditions.................................................................................................................................. 5

      5.3         Groundwater ................................................................................................................................................. 6

      5.4         Geotechnical Laboratory Testing .................................................................................................................. 7

6.0   ENGINEERING ASSESSMENT ................................................................................................................................ 7

      6.1         Earthworks .................................................................................................................................................... 7

      6.1.1            Site Preparation ...................................................................................................................................... 7

      6.1.2            Excavations ............................................................................................................................................. 7

      6.1.3            Material Re-Use ...................................................................................................................................... 8

      6.1.4            Trafficability ............................................................................................................................................. 8

      6.1.5            Filling....................................................................................................................................................... 8

      6.2         Temporary and Permanent Retention........................................................................................................... 9

      6.3         Building Foundations .................................................................................................................................. 10

      6.3.1            Footing Options ..................................................................................................................................... 10

      6.3.2            Raft Footing Design .............................................................................................................................. 10

      6.3.3            Piled Footing Design ............................................................................................................................. 11

      6.3.4            Earthquake Design Considerations ....................................................................................................... 12

      6.3.5            Site Classification .................................................................................................................................. 12

      6.4         Permanent Drainage................................................................................................................................... 12

      6.5         Additional Investigation ............................................................................................................................... 12

7.0   ACID SULFATE SOIL ASSESSMENT .................................................................................................................... 13

      7.1         General ....................................................................................................................................................... 13

      7.2         DERM ASS Mapping .................................................................................................................................. 13


2 February 2023
Report No. 22500-001-Rev0                                                               ii