GEOTECHNICAL INVESTIGATION REPORT THE RENEWAL OF UNDERBRIDGEWEE WAA – 600.500KMTABLE OF CONTENTS1.INTRODUCTION..................................................................................................................................22.SITE DESCRIPTION...........................................................................................................................23.TOPOGRAPHY AND GEOLOGY.....................................................................................................24.INVESTIGATION METHODOLOGY.............................................................................................335.SUBSURFACE CONDITIONS AND APRAISAL.............................................................................335.1 SILTY CLAY - LAYER (1)...........3 3 5.2 MIXED SOIL LAYER - LAYER (2)4 4 5.3 SILTY CLAY - LAYER (3)................................................................................................................................................. 4 4 5.4 SAND AND SILT - LAYER (4)................................................................................................................8 6 5.5 SIMPLIFIED GEOTECHNICAL MODEL......................................................................................................8 6 5.5 LABORATORY TESTING.........................................................................................................................8 6 5.5 FOUNDATION TREATMENT AND GEOTECHNICAL PROPOSAL...................................................................9 7 5.5.1 Shallow Footings (Option 1)........................................................................................................975.5.2 Pile foundation (Option 2).........................................................................................................1086.CONCLUSIONS AND RECOMMENDATIONS.............................................................
