Young Geotechicnal Professionals’ Night

Peter Retsos: Investigation of the Piles Creek Embankment Collapse An embankment at Piles Creek failed during heavy rain in June 2007. Five deaths occurred when a vehicle then drove into the void created by the collapse. The subsequent investigation of the collapse was undertaken by Connell Wagner in a collegial manner with expert representatives from …more

Reducing Slope Risk on Lawrence Hargrave Drive

Lawrence Hargrave Drive north of Wollongong is one of the most scenic coastal roads in New South Wales. Several years ago a section of the road was judged to have the highest slope risk in the state with a long history of rock falls, debris flows, embankment failures and road closures. In 2003, the State …more

Role of the Principal Contractor

An introduction to the role of the Principal Contractor, the level of skill and expertise necessary to fulfill the role and the risks and liabilities which companies and individuals assume when taking on this role. Summary discussion on the key legislative requirements and the different triggers that activate the principal contractor role, and in particular, …more

A Brief Introduction to the Monitoring of Urban Tunneling Projects

In this short talk, Dr Bassett will set out a complete philosophy of planning, installing and assessing instrumented tunnelling projects in soft soils and hard rock ground. Approaches to observing and recording factors such as tunnel displacement, vertical settlement and horizontal strains will be discussed, along with the purpose, importance and correct procedure of implementing …more

Geotchnical Aspects of the Eastern Busway and South East Queensland Infrastructure Plan Rail Program Alliance Projects

In May 2007, the Queensland Government updated its $82 billion blueprint for upgrading a range of infrastructure in South East Queensland (SEQ). The South East Queensland Infrastructure Plan 2006-2026 (SEQIP) outlines two decades of development of road, rail, water, energy, health, education and community infrastructure. Of this, $35 billion has been allocated for a roads …more

Engineering Geologists and Risk Management

Dr Mora is currently on a speaking tour of Australia and New Zealand and is eminently qualified to speak on the top of risk management having until recently held the position of Environmental, Natural Resources and Risk Management Specialist at the Inter-American Development Bank and before that Professor of Geotechnical Geology, Soils and Rocks Mechanics …more

Technical Meeting – “Blasting in the Urban Environment”

Drilling and blasting for civil construction is a process that is sometimes unnecessarily excluded from consideration in tenders and project specifications. However modern blasting technology has made breaking rock with explosives safer, more secure, and more productive than ever before. This talk will cover some of the practicalities of blasting in built up areas, with …more

Lane Cove Tunnel Retaining Structures

The Lane Cove Tunnel connects the M2 Motorway at North Ryde with the Gore Hill Freeway and the Pacific Highway at Artarmon. Design and construction involved about 70 retaining structures which included braced and anchored bored pile walls, soil nailing, reinforced soil wall systems and post-tensioned cantilever walls. Significant challenges related to restricted site access, …more

Design and Construction of Asphalt Concrete Core Embankment Dams

The application of asphaltic materials in hydraulic structures can be traced back 5000 years. In the previous 50 years, asphalt concrete (AC) has been used as the water sealing section of earth fill dams in some countries such as Norway, Germany, Iran, China and the USA. AC is often used when short construction times are …more

Vacuum Consolidation of Soft Clay via Vertical Drains

In many countries, the majority of population lives along the coast, which contains soft soil deposits that require ground improvement. Loose sandy soils and soft compressible clays are very common along the coastal regions. The use of vertical drains with vacuum preloading is considered as the most effective and economical method for improving soft clays …more

Performance Based Aseismic Design of Rigid Retaining Walls

Retaining walls have failed either by sliding or by a combined action of sliding and rocking displacements during earthquakes. Performance Based Design of the retaining walls in seismic areas must account for these displacements, in addition to the usual factors of safety against failure in bearing, sliding and overturning. A realistic model for estimating dynamic …more

The 2009 Terzaghi Lecture: “Uncertain Geotechnical Truth and Cost-Effective High-Rise Foundation Design”

The essential requirements for the design of foundations for the world’s tallest buildings, from a geotechnical perspective are presented. The basic types of foundation, special in-situ testing, and load testing techniques commonly used, and several key principles to remember including the need for close structural engineering and geotechnical engineer cooperation are discussed. Note that this …more

Geotechnical baseline reports as an underground risk management tool

The presentation will explore the nature of underground risk, and Singapore’s management of uncertainty and unforeseen conditions in recent underground work. This talk will look in particular at two projects, the 48km Deep Tunnel Sewerage System (DTSS) Project and the 5 km Marina Coastal Expressway (MCE). The projects have important similarities in their use of …more

Climate Change and the Challenges for Geotechnical Engineering

In this presentation climate change implications will be discussed by outlining a relationship between climate and reactive soil movements. The climate is defined in terms of the Thornthwaite Moisture Index (TMI) as used in AS 2870-1996 “Residential slabs and footings”. The yearly value of TMI determined for Adelaide, Melbourne and Sydney will be presented and …more