2011 Newcastle Meetings

Drilled Shaft Instrumentation for O-cell Tests

The O–Cell is a device for determining inplace drilled shaft skin friction and end bearing. It can be used in single or multi-layer stratigraphy and is generally more convenient than traditional load testing methods. In this talk, the general requirements for O-cell instrumentation will be presented, including the differences in instrumentation required for O-cell bi-directional …more

Gunnedah Basin Geology

The Gunnedah Basin hosts large resources of predominantly thermal coal within an Early Permian to Middle Triassic structural basin that is currently the subject of much exploration and mining activity. The limits of the Gunnedah Basin extend from Williow Tree to Dubbo to Moree. Coal in the Gunnedah Basin is present within two Permian packages: …more

Building 3D models of rock strength using geophysical logs

In Australian coal mining, geophysical logs are run in most exploration boreholes. The conventional suite of logs includes the natural gamma, density and sonic logs. A qualitative examination of these logs allows the basic geological section to be inferred. For many years, geotechnical engineers and geologists have also used sonic data to empirically estimate UCS. …more

Palmers Road landslides: 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

Ballast!! Who needs it?

Rail track ballast is often ignored in the rush to deliver on rail upgrades with money going into more obvious tangible assets like sleepers, rails, fastenings, signalling, and “big yellow machines” etc. As has been witnessed lately with the problems of track geometry on the Main Southern Railway, the condition and depth of ballast is …more

2011 NSW Research Awards

Cone Penetration Tests in Unsaturated Soils Mohammad Pournaghiazar, University of New South Wales The Cone Penetration Test (CPT) is a widely used in situ test. CPT data are used to evaluate the engineering properties of soils based on a number of correlations proposed for saturated or dry soils. However, no such correlations currently exist for …more

Newcastle geology: 250 million challenges for the engineering geologist

This presentation will outline classical aspects of the geology of the Newcastle region, concentrating on the Newcastle Coal Measures, and how various aspects impinge on the work of engineering geologists. The presentation considers stratigraphic variation, including the unusual occurrence of conglomerates, and sedimentary variation, notably the occurrence of expansive clayrocks; tectonics, mainly through the examination …more

Lessons from the Yallourn Batter Failure Inquiry

The Northern Batter of the Yallourn Mine collapsed at approximately 2:00am on 14th November 2007. The collapse diverted the Yallourn River into the mine, resulted in the immediate loss of one fifth of Victorias Power Generation capacity and cost the mine over $200 million. Because of the environmental and infrastructure damage, the Victorian Government decided …more

A Framework For Forensic Engineering

Co-hosted with EA Civil/Structural Branch, EA Engineering Practice and ASCE Australia Section Forensic geotechnical engineering is gaining increasing importance in many countries where foundation failures may lead to litigation and even criminal action. This lecture describes a relatively simple framework for investigating the possible causes of foundation failures in a systematic manner. Attention is confined …more

Working platform assessments for tracked plant

Every year piling rigs fall over or are subject to near misses due to inadequately prepared or maintained site surfaces – often such incidents involve potential fatalities or serious injury to operatives and extensive damage to equipment. Modern piling equipment is becoming increasingly heavy, often with higher centres of gravity, to cater for the demand …more

Limit Analysis for post-failure analysis: application to structural geology

The objective of this talk is to present a simple approach to predict the internal de- formation of frictional wedges resting on weak decollements. The fundamental mode of deformation is by thrusting, corresponding to the onset of two faults (shear bands), the ramp and the hinge, rooting at the same point on the decollement and …more

AGS Newcastle City Geology Tour

The AGS Newcastle City Geology Tour is loosely based on the excursion given in Field Geology of New South Wales by Branagan and Packham (2000), and Dr. Branagan himself has kindly agreed to offer his expert commentary at the various destinations.  The morning component of the tour (approximately 8:00-12:00) will commence at King Edward Park …more