Blog Archiv1es

Advances in Geotechnics of Roads and Railways

Introduction The Sydney Chapter of the Australian Geomechanics Society (AGS) is proud to present its sixteenth annual Symposium to be held on 10 October 2012, titled “Advances in Geotechnics of Roads and Railways”. The Symposium forms part of the continuing program of events by the Sydney Chapter of the AGS, designed to keep the engineering …more

Posted in 2012 Meetings, Meeting, Sydney |

Some Mining Application of Unsaturated Soil Mechanics

Unsaturated soil mechanics continues to play poor relation to saturated soil mechanics, in part because of the dominance of conventional soil mechanics approaches involving saturated conditions, perhaps because the inclusion of another phase (air) adds considerable complexity, and because a soil at a given density is stronger, less compressible and less permeable (i.e. performs better) …more

Posted in 2012 Meetings, Meeting |

The NSW Research Award

Experimental investigations into using non-destructive techniques for Characterising compacted soil Ana Paula Heitor, University of Wollongong Conventional field compaction control methods, including nuclear gauge, sand cone and rubber balloon, perform well for controlling the compacted soil at time of placement; however because of their localised nature these techniques may not be suitable for deeper fills …more

Posted in 2012 Meetings, Meeting, Sydney |

Grouting at Ipswich and Hunter Expressway

Abstract – Part 1 – Ipswich Motorway, Bill Holz The upgrade of one of Queensland’s busiest road transport corridors, the Ipswich Motorway, between Dinmore and Goodna by the Queensland Department of Transport and Main Roads (DTMR) involved re-aligning the motorway corridor over two separate abandoned coal mines and adjacent a third. During the preliminary site …more

Posted in 2012 Newcastle Meetings, Meeting, Newcastle |

NSW Research Award Presentation

Experimental Investigations into Using Non-Destructive Techniques for Characterising Compacted Soil Ana Paula Heitor, University of Wollongong Conventional field compaction control methods, including nuclear gauge, sand cone and rubber balloon, perform well for controlling the compacted soil at time of placement; however because of their localised nature these techniques may not be suitable for deeper fills …more

Posted in 2012 Newcastle Meetings, Meeting, Newcastle |

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

Posted in 2011 Newcastle Meetings, Meeting, Newcastle |

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

Posted in 2011 Newcastle Meetings, Meeting, Newcastle |

What happened to the mechanics in rock mechanics and the geology in engineering geology?

A good thing is becoming a bad thing. Rock mass classification systems, that are so excellent for communications between engineers and geologists, and that can be valuable in categorising project experience, are emasculating engineering geology and rock mechanics. Some engineering geologists have been sucked in to thinking that Q and RMR values are all that …more

Posted in 2012 Newcastle Meetings, Meeting, Newcastle |

Geotechnical Investigation of Mount St. Helens’ New Roadway after May 18, 1980 Eruption

The May 18, 1980, eruption of Mount St. Helens was the deadliest and most economically destructive volcanic event in the history of the United States. Nearly 230 square miles of the forest was blown over or left dead and standing; 57 people were killed; and 47 bridges, 24 km (15 miles) of railways, and 298 …more

Posted in 2012 Meetings, Meeting, Western Australia |

Probabilities of Failure & Factors of Safety in Geotechnical Engineering

There has been a rapid growth of interest in both academe and industry in the use of probabilistic methods in geotechnical engineering. In hindsight this is not too surprising, since soils and rocks are among the most variable of all engineering materials, and geotechnical engineers must often make do with materials they are dealt with …more

Posted in 2012 Meetings, Meeting, Tasmania |

Ground Improvement in the Christchurch Rebuild – A Contractor’s Perspective

The talk will present the perspective of a specialty geotechnical contractor, now active in Christchurch, on the working environment within the ongoing seismic activity of the region. Ground improvement methods applicable for the lifting/leveling and seismic mitigation of structures will be presented. Several case histories of work performed will be presented to include some aspects …more

Posted in 2012 Newcastle Meetings, Meeting, Newcastle |

Design of Columnar-Reinforced Foundations

The design of columnar-reinforced foundation usually involves two verifications, first, the bearing capacity and, second, the settlement that can be completed by the acceleration of consolidation settlement. The basis of suggested methodology consists in estimating, first, a minimum improvement area ratio (IAR) complying with the allowable bearing capacity of reinforced soil; then a maximum IAR …more

Posted in 2012 Meetings, Meeting, Victoria |

Geology and Geomorphology of Bacchus Marsh Region: Field Trip

The geology and geomorphology of the Bacchus Marsh region has been of interest to geologists since the 1860’s, with a wide range of rock types of various ages and depositional environments present. The extraction of natural resources has been an important industry in the area, with brown coal, basalt, sands and gravels worked from the …more

Posted in 2012 Meetings, Meeting, Victoria |

Geology and Geomorphology of Bacchus Marsh Region

The geology and geomorphology of the Bacchus Marsh region has been of interest to geologists since the 1860’s, with a wide range of rock types of various ages and depositional environments present. The extraction of natural resources has been an important industry in the area, with brown coal, basalt, sands and gravels worked from the …more

Posted in 2012 Meetings, Meeting, Victoria |

Probabilities of Failure and Factors of Safety in Geotechnical Engineering

There has been a rapid growth of interest in both academe and industry in the use of probabilistic methods in geotechnical engineering. In hindsight this is not too surprising, since soils and rocks are among the most variable of all engineering materials, and geotechnical engineers must often make do with materials they are dealt with …more

Posted in 2012 Meetings, Meeting |

Bogong Power Development – Estimation of ground conditions under severe constraints

The completion of the Bogong Power Development Project during 2009 in the alpine region of north east Victoria involved construction of 7.6 km of tunnels and shafts and an underground power station. The project cost was $240 M and provided 140 MW of power. This project saw the completion of the ‘missing link’ in the …more

Posted in 2012 Meetings, Meeting, Tasmania |

Some Lessons From Geotechnical Failures

Dr David Tonks will discuss a number of recent significant geotechnical ‘failures’, many of which have resulted in substantial damage and cost. Some have ended up in complex and expensive litigation. Examples include construction on very soft ground, with some ongoing consolidation settlements exceeding 2 m, collapse of an arch tunnel structure during construction, movements …more

Posted in 2012 Meetings, Meeting, South Australia and NT |

Remote Sensing and GIS Based Materials Information Management

The state’s road pavements are required to perform under increasingly severe conditions with both increasing mass limits and increasing traffic volumes. Hence there is a critical need to locate new economic aggregate sources for future work on highways in the western part of the state such as the Newell and Sturt Highways. This presentation provides …more

Posted in 2008 Meetings, Meeting, Sydney |

AGM followed by the EH Davis Lecture: Foundations in Rock

Regardless of recent advances in testing, analysis, construction methods and materials, the geotechnical design of foundations in rock for many applications is still dominated by empirical correlations, rules of thumb and traditional values. These methods were developed at a time when our knowledge was less, analysis methods were relatively simplistic, our construction equipment was of …more

Posted in 2007 Meetings, Meeting, Sydney |

Soil-environment interactions in geotechnical engineering

In the lecture, a number of developments incorporating the effects of new phenomena and new variables on the behaviour of soils will be described and discussed. Recent developments in Unsaturated Soil Mechanics will be reviewed first. It will be shown that they provide a consistent framework for understanding the engineering behaviour of unsaturated soils and …more

Posted in 2007 Meetings, Meeting, Sydney |