The geotectonics and geotechnics of Traveston Crossing Dam foundation
Traveston Crossing Dam is proposed for construction at AMTD 207.6 km on the Mary River about 25 km upstream of Gympie in South East Queensland. The Mary Valley at the damsite is located in a zone of complex geology resulting from formation in a tectonic accretionery wedge setting. This has been responsible for a complex current geological setting which has required a range of geological/geotechnical investigation and interpretation techniques to develop a model on which to base the dam's preliminary design. This paper describes the tectonic history and the innovative techniques used in developing the geological model for the dam foundation. The investigation involved the following specific investigative techniques; aerial photograph interpretation, geological mapping, geotechnical drilling including water pressure testing, seismic refraction profiling, downhole geophysical logging, excavation and geological mapping of large excavations, and hydrogeological investigation involving investigative drilling and pumping tests. A Vulcan 3D computerised geological model was constructed using borehole data, seismic refraction interpretation and downhole geophysics interpretation. The geological model has been used in the development of the preliminary design and confirms that the foundations are suitable for the proposed structure.
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|Item Type:||Conference Paper|
|Keywords:||Mapping, sedimentary rocks, dams, structural geology, trenching|
|Subjects:||Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > OTHER EARTH SCIENCES (049900)|
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) (040311)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Structural Geology (040312)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
Current > Research Centres > Science Research Centre
|Copyright Owner:||Copyright 2007 (please consult author)|
|Deposited On:||17 Mar 2008|
|Last Modified:||09 Jun 2010 22:57|
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