2010 Meetings

Palmers Road Landslide: Investigation, Analysis & Remediation

Slope instability is a relatively common occurrence in the Gosford – Lake Macquarie – Newcastle area. The occurrence of landslides and their mechanisms are determined by the geology and hydro-geology of the various regions and care must be taken to understand this regional context when investigating and designing engineering works. In June 2008 a routine …more

50th Rankine Lecture: Stiffness at Small Strain- Research and Practice

The rapid development of computing power and of numerical modelling software over the past forty years has made sophisticated analysis of geotechnical problems accessible to most practising engineers. Typically computer packages now offer a wide range of constitutive models, which the design engineer needs to choose between, and then obtain parameters for. For those structures …more

Young Geotechnical Professional’s Night

Ana Heitor: Characterisation of Compacted Soil Using Shear Wave Velocity Field compaction testing is widely undertaken using nuclear density meters. Due to its localized nature however, the method is limited in assessment over larger depths and wider surface areas. Only a few studies have evaluated compacted soil behaviour under unsaturated conditions using alternative non-destructive testing, namely …more

Next Generation of Unsealed Roads

Low volume rural roads are typically unsealed roads and numerous Australian and international studies have been carried out to improve their durability and reduce dust. New products and equipment have been produced and tested, and unfortunately many of these new products are typical promoted by the so called ‘snake oil’ salesman. The goal of the …more

Concepts & Parameters Related to Ground Improvement Illustrated by Case Histories

The International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE) Technical Committee on Ground Improvement, has proposed a classification system of ground improvement techniques according to the general nature of the soil, (frictional or cohesive) and the inclusion or not of added material (http://www.bbri.be/go/tc17). This classification system has been detailed in the state of the …more

Ipswich Motorway Upgrade, Dinmore to Goodna: Remediation of Abandoned Coalmines

At $2bn the Ipswich Motorway, D2G Upgrade southwest of Brisbane is the largest federally funded project in QLD. The 8km section of road, Queensland’s busiest, crosses three abandoned coal mines worked at various times between the late 1800s and the 1980s. Following investigation and analysis of the stability of each of the mines the decision …more

A Practical Guide to Abandoned Mine Subsidence Assessment and Mitigation

Mine subsidence can take the form of sinkholes or troughs depending on mining and geologic conditions. Examples of the geology, mining, and subsidence features encountered in core and on the surface from US Bituminous Coal fields, particularly in the widely mined Pittsburgh Coal Seam; the Anthracite Coal field of north-eastern Pennsylvania; and the Sydney Basin, …more

The NSW Research Award: Advanced research in Geotechnical Engineering

Ali Ghandeharioon: Analytical and Numerical Studying of Disturbance and Pore Pressure in Soft Cohesive Soils Associated with the Installation of Mandrel-driven Prefabricated Vertical Drains This research investigates the installation of mandrel-driven PVDs and the associated disturbance in cohesive soils using a novel elliptical cavity expansion theory validated by laboratory experiments and numerical modelling. The pattern of …more

E.H. Davis Memorial Lecture: Recent Advances in the Application of Vertical Drains and Vacuum Preloading in Soft Soil Stabilization

Over the past 15 years, Prof. Buddhima Indraratna and his co-workers have developed numerous experimental, analytical and numerical approaches that simulate the mechanics of prefabricated vertical drains (PVD) and vacuum preloading including both two-dimensional and three-dimensional analyses and more comprehensive design methods. This lecture presents an overview of the theoretical and practical developments and salient …more

The 2010 Poulos Lecture : Modelling of Erosion

Following the discovery of sinkholes in the WAC Bennett Dam, British Columbia, in 1996, investigations showed that there had apparently been movement of fine material out of the core of the dam. The internal erosion (suffusion) is caused by continuing slow seepage but the concern is for the long term mechanical consequences. In order to …more