2006 Newcastle Meetings

41st Karl Terzaghi Lecture: Unsaturated Soil Mechanics in Engineering Practice

Unsaturated soil mechanics has rapidly become a part of geotechnical engineering practice as a result of solutions that have emerged to a number of key problems (or challenges). The solutions have emerged from numerous research studies focusing on issues that have a hindrance to the usage of unsaturated soil mechanics. The primary challenges to the …more

Numerical algorithms for large deformation analysis in geomechanics

Large deformation analysis is very important in some problems of geomechanics. Soft clays experience large amounts of settlements under applied loads and consolidation, for which the small deformation assumption does not result in precise solutions. The large deformation considerations are vital for these problems especially in Australia, since there is a large amount of soft …more

Solid Waste Landfill Geotechnics

Solid waste is a particulate material that is analogous to soil in many respects, although with somewhat extreme engineering properties. The presentation concerns the application of geotechnical engineering concepts to solid waste landfill behaviour. A number of applicable geotechnical engineering analysis approaches will be discussed and illustrated. The major topics covered by the presentation comprise …more

Hydraulic Containment at Landfill Sites

The world’s deepest continuous trench groundwater barrier wall is currently under construction at the former Newcastle Steelworks site. Contractor Austress-Menard (A-M) was engaged by the Regional Land Management Board (RLMC) to design and construct the barrier wall to reduce migration of contaminated groundwater to the adjacent Hunter River, as part of the remediation strategy for …more

Hydraulic Containment at Landfill Sites

A hydraulic containment system of some description is commonly required to abate the offsite migration of leachate and/or contaminated groundwater at landfill sites, and to a lesser extent other contaminated sites (i.e. industrial facilities). In Australia, these systems typically comprise pumping leachate/groundwater from a series of extraction bores to maintain an inward hydraulic gradient, with …more

Characteristics of Vacuum Consolidation

Laboratory consolidation tests under odometer conditions were conducted under both vacuum pressures and surcharge loads. The characteristics of vacuum consolidation have been investigated by comparing vacuum pressure and surcharge load induced consolidations. Firstly, regarding the magnitude of consolidation settlement, vacuum pressure induced less or the same settlement as that by a surcharge load with the …more

Recent applications of the “square” impact roller

Impact roller technology has been available in Australia since 1985, and it has found use in a wide range of applications. Examples of some of these show the breadth of innovative projects and how the Australian civil and geotechnical fraternity have embraced the concept. More recent applications in the mining sector and on large-scale earthworks …more

“Who Needs Constitutive Models?”

Constitutive models are essential in any rational theoretical modelling in geotechnics. How the stress-strain response of soil or rock is represented in these models is usually the key to successful prediction of the behaviour of geotechnical structures. However, the important details of these models, particularly the idealizations that are made, are often poorly understood or …more

2005 Poulos Lecture “Soft clay engineering: site characterisation and design of shallow foundations and anchoring systems”

The worldwide trend in the offshore industry is towards ever deeper water, where the seabed sediments mostly comprise normally or lightly overconsolidated soft, fine-grained sediments. This has brought particular challenges in characterising the soil, with much greater reliance on in situ testing, and designing seabed foundation and anchoring systems. The upper 0.5 to 1 m, …more