Geosynthetics in Road Pavement Design Methods

The use of geosynthetic materials such as geogrid, geotextile and geocomposite products in roads and pavements for reinforcement has been demonstrated to be a viable technology through studies conducted over many years. Research has shown the importance of design variables in the efficiency of geosynthetic materials. The use and specification of geosynthetics for pavement support …more

E.H. Davis Memorial Lecture 2012: Combined Loading of Offshore Foundations

Predicting the bearing capacity of a foundation under combined vertical (V), horizontal (H) and moment (M) loads is a fundamental soil mechanics problem. Traditional solutions utilise ad-hoc adjustment factors to reduce the pure vertical bearing capacity in order to account for inclination, eccentricity, foundation shape and soil strength gradients. These procedures have their roots in …more

Laboratory Testing, Theory and Practical Application

The course aims to provide information on geotechnical laboratory testing methods to professionals working in the civil and mining industry. Although the subject is often taught during formal education, the actual implementation of that knowledge is not always straight forward. Some of the issues that will be covered in this workshop are: How to determine …more

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