Meeting

Art Gallery of SA – Deep Basement Construction

The presentation will cover the construction of the recently completed $26 million extensions to the Art Gallery of South Australia. Particular emphasis will be on the construction of the 10 m deep basement as redesigned to accommodate “top down” construction and the locally developed interlocking bored pile retaining wall technique. The key features to be …more

Melbourne Crown Casino – Geotechnical Issues

The Melbourne Crown Casino, billed as one of the largest in the world, has been built on about a 6 hectare site on the south bank of the Yarra River in Melbourne. The $1.6 billion project includes 11 hectares of underground car parking, on two levels, theatres, gaming halls, restaurants and a 40 storey hotel. …more

Annual Half-Day Seminar – Environmental Geomechanics

Speakers included: Roger Parker, Linton Johnston, Clive Jenkins, Michael Cannell, Alex Eadie, Alan Ockenden, James Begg, Dr Peter Mitchell Geoenvironmental practice in Australia Urban stormwater contaminants Heavy metals in the sediments of constructed wetlands: safely locked up or mobile and toxic? Instrumentation for environmental geomechanics Environmental auditing of contaminated land in SA Managing urban catchments …more

Blanchetown Bridge Replacement – Geotechnical Investigation

Site work has started for the construction of a new bridge at Blanchetown. This bridge will be one of the biggest built in the state in recent times. A seismic study to provide information for the alignment of the new bridge was performed by Coffey Partners International. The geotechnical investigation for the new bridge was …more

Tailings Management at Olympic Dam – Current Practises and Future Options

Tailings management at Olympic Dam involves the monitoring and control of solid and liquid components of the tailings slurry. Tailings slurry is deposited in thin layers using a spigot system from the perimeter of each cell. The solids settle onto the tailings beach whilst the supernatant liquor is collected from the centre of each cell. …more

The Re-Use of Sediment Drained from the Patawalonga

Between the middle of 1995 and the middle of 1996, approximately 300 000 m3 of sediment was dredged from the Patawalonga Basin. The sediment was deposited in ponds along Tapleys Hill Road and the water drained from it. In July 1996 accelerated drainage measures were instituted which allowed the material to be removed from the …more

Annual visitors night: India – Roads and Life

Did you ever wonder why the Taj Mahal has lasted as long as it has? Did you ever wonder how they build roads in India? In this seminar Bob regaled us with pictures and words of his recent trip to the subcontinent where he went to exchange knowledge on the intricacies of road building, and …more

Construction of the Blanchetown Bridge

Construction of the new bridge at Blanchetown is nearly complete. The new bridge was incrementally launched and its deck is a post tensioned concrete box girder 407m long. Some difficult ground conditions and the close proximity of the existing bridge posed problems for both design and construction. Prior to construction, predictions were made of the …more

Collapsing Soils

Collapsing soil is defined in AS2870 as a weakly cemented soil subject to large settlements under load as a result of degradation by water on the cementing action. These soils are frequently encountered in South Australia and present challenges for geotechnical engineers and footing designers. Dr Mitchell described some experiences with collapsing soils, presented several …more

Cobblers Creek Retention Dam Project

The Cobbler Creek retention dam in the City of Salisbury was constructed in 1997. Exposures seen during excavation for the dam and spillway foundations provided interesting insights into the geological formations in the foothills of the Mount Lofty Ranges. These formations, including the Quaternary sediments and folding and faulting of the underlying rocks, were discussed …more

Southern Expressway Project

Stage 1 of the Southern Expressway project between Darlington and Reynella has been one of the most significant road projects in recent times both from environmental and geotechnical aspects. This seminar covered many of these aspects and included a detailed discussion of a number of slope stability “challenges” that were encountered.

Annual Half-Day Seminar – Recent Developments in Pavement Technology*

Speakers include: Richard Cavagnaro, Don Cameron, Bob Andrews, Doug McInnes, Ted Booth, Chris Mathias, Kevin Mills, Craig Gilbert Increased Legal Axle Loads Resilient Modulus Variations in Clay Subgrades Crushed Rocks Related to Pavement Performance Haul Road Design Recent Advances in Sealing Technology New Applications for the Falling Weight Deflectometer Recent Experience with Local Pavements

Enhanced Natural Biodegradation (ENB) of Diesel Contaminants at the Mile End Railyards

One of the largest “design and construct” above ground bio-remediation projects implemented in Australia has been completed recently at the former Mile End rail-yards site, Adelaide. A total of 8,000m3 of diesel and oil impacted soil was successfully treated using the ENB process. This process involved the growth stimulation of naturally occurring aerobic micro-organisms and …more

Mt Barker Road Project Visit

This meeting involved a visit to the South Eastern Freeway project and a talk by Andrew Campbell from Maunsell who is involved with the geotechnical design on the project. The visit and the talk covered all aspects of the project including the design and stabilisation of the rock slopes between the Tollgate and Crafers, the …more

Modelling of Offshore Foundations

The lecture focussed on recent results of physical and numerical modelling of a range of foundation systems in uncemented calcareous sediments typical of Australia’s offshore hydrocarbon fields. Foundation types included skirted foundations, suction-emplaced caissons, and drag anchors. In each case, simplified models of behaviour were described, and the results compared with those from more sophisticated …more

Inaugural Young Geotechnical Engineers Night and Annual General Meeting

A total of 5 young geotechnical engineering graduates and students individually gave a 10 minute presentation on a range of interesting projects. The winner of the Inaugural Geotechnical Engineer’s Night was Brendan Scott, Final Year Civil Engineering Student, University of Adelaide.

Construction and Hydrogeological Aspects of Melbourne’s City Link Project

The 15 m wide by 9 m high tunnels of Melbourne’s City Link Project presented a series of geotechnical and hydrogeological problems during design and construction. The 3.6 km and 1.6 km long tunnels were, at times, driven beneath a major confined alluvial aquifer with minimal rock cover. Mr. Hutchison gave an overview of the …more