Geotech Report Reference Document OPW19-0239 · OPW19/0239

Gympie Terrace Noosaville Pty Ltd



Table of Contents

1.0       INTRODUCTION .................................................................................................................................... 1
2.0       PROPOSED DEVELOPMENT ............................................................................................................... 1
3.0       SITE DESCRIPTION .............................................................................................................................. 1
4.0       METHOD OF INVESTIGATION ............................................................................................................. 2
4.1       Review of available information .............................................................................................................. 2
4.2       Fieldwork................................................................................................................................................. 2
4.3       Geotechnical Laboratory Testing............................................................................................................ 2
5.0       RESULTS OF INVESTIGATION ............................................................................................................ 3
5.1       Published Geological Information & Acid Sulfate Soil Information ......................................................... 3
5.2       Subsurface Conditions............................................................................................................................ 4
5.3       Groundwater ........................................................................................................................................... 4
6.0       GEOTECHNICAL COMMENTS & RECOMMENDATIONS ................................................................... 5
6.1       Site Preparation and Trafficability ........................................................................................................... 5
6.2       Excavatability & Stability ......................................................................................................................... 5
6.2.1         Temporary Support & Dewatering ...................................................................................................... 5
6.3       Material Suitability for Re-use ................................................................................................................. 6
6.4       Basement Design ................................................................................................................................... 6
6.5       Foundations ............................................................................................................................................ 6
6.5.1         High Level Footings ............................................................................................................................ 6
6.5.2         Piles .................................................................................................................................................... 7
6.5.3         General ............................................................................................................................................... 7
6.6       Retaining structures ................................................................................................................................ 8
6.7       Drainage ................................................................................................................................................. 8
6.8       Aggressivity of soils ................................................................................................................................ 8
7.0       ACID SULFATE SOIL ASSESSMENT ................................................................................................... 9
7.1       ASS Summary ........................................................................................................................................ 9
8.0       LIMITATIONS ....................................................................................................................................... 10
C1.0      ACID SULFATE SOILS INVESTIGATION METHOD AND RESULTS ................................................ 15
C1.1      Laboratory testing ................................................................................................................................. 15
C1.2      Groundwater Quality Analysis .............................................................................................................. 15
C1.3      Preliminary Screening........................................................................................................................... 16
C1.4      Quantitative Soils Analysis ................................................................................................................... 16



Tables
Table 1: Summary of laboratory testing............................................................................................................. 3
Table 2: Summary of Groundwater Conditions (14 November 2018) ............................................................... 4
Table 3: Retaining structure design parameters. .............................................................................................. 8
Table 4: Liming Rates ........................................................................................................................................ 9




J000799-002-R-Rev0                                                                                                                                      Page ii