Blog Archiv1es

46th Terzaghi Lecture Downunder – Geosynthetic Reinforced Soil: From the Experimental to the Familiar

The lecture begins with a historical review of reinforced soil technology, from the ancients, the developments by H. Vidal and K. Lee on Terre Armée and Reinforced Earth, the early uses of geosynthetics for soil reinforcement in France (Bidim), Sweden (Wager and Broms), and the USA (USFS, FHWA, J. R. Bell, T. A. Haliburton, B. …more

Posted in 2012 Meetings, Meeting, Sydney |

Laboratory testing and hydromechanical behaviour of unsaturated soils

The presentation focuses on the hydro-mechanical behavior of unsaturated soils. It is a challenging area of research, from both experimental and theoretical point of view. The role of unsaturated soils is of paramount importance in the design of engineered barriers, in the collapsible and expansive behavior of fills and natural soils, in the driving mechanism …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Coastal Change Monitoring using Geomatic Techniques

In recent years change monitoring has become an increasingly important issue, particularly for landforms and areas that are potentially hazardous to human life and assets. The coastal zone is currently a sensitive policy area for those involved with its management, as phenomena such as erosion and landslides affect the stability of both the natural and …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Darwin to Alice… By Rail

The Alice Springs to Darwin rail link project has been 100 years in gestation and only became reality as a result of co-operation between Federal and State Governments and the investment of private enterprise. Tendering started in 1997 with preferred construction and management team the Asia Pacific Transport Corporation nominated out of short list of …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

2003 Darcy Lecture: Ground and surface water contributions to chemical mass discharge

Richelle presented the 2003 Darcy lecture, which included the results of investigation and modelling of the migration of agricultural chemicals to groundwater. The pathways by which agricultural chemicals (nonpoint pollutants) move from fields to streams vary in time, exemplified by work from the semi-arid Palouse River watershed in eastern Washington. Precipitation is strongly seasonal, occurring …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Geotechnical Engineering in Antarctica

At least three Australian Geotechnical Engineers have visited Antarctica in the past eight years to conduct geotechnical investigations. Most recently, Sam was contracted by the Australian Antarctic Division to visit Davis Station for a period of five months over the 2002/2003 summer. The specific geotechnical issues associated with development in the cold regions of the …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Two presentations

Properties of a model for the yield and flow of granular materials Dr David Harris, Department of Mathematics, UMIST, UK Some properties of a continuum model for yield and flow of granular materials are presented in which a physical quantity analogous to grain rotation is incorporated by using a reduced Cosserat model. The intrinsic spin …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Tensile & compressive capacities of piles in sand under repeated loading

A series of pile load tests were carried out in a geotechnical test pit and in a geotechnical centrifuge to determine the shaft resistance in compression and in tension during repeated loading. In the geotechnical test pit open ended steel pipe piles were jacked into compacted moist sand and after eliminating the end bearing by …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Poulos Lecture: Engineering Geological Challenges for the Active NZ Environment

New Zealand is a highly varied landmass with many different terrains displaying defective and difficult rock and soil masses crafted by a collection of hazardous geologic processes. This presents a unique challenge to engineering development. This talk offers a personal view of the contribution engineering geology has made to our understanding of this active New …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Numerical Investigation into the influence of bored piles on existing tunnels

In the urban environment, deep foundations are often constructed in locations very close to existing tunnels. Many tunnels can often only tolerate minimal movements. Tunnel owners are concerned that the process of bored pile construction and/or the subsequent loading of the piles may cause intolerable movements or stress levels that might cause cracking of the …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

D H Trollope Lecture: The Mathematics of Engineering

Boundary conditions are critical to the solution of most differential equations encountered in the physical sciences and engineering. In many mathematical models great lengths are taken to derive and explain the governing differential equations, the boundary conditions seem to be an optional extra! It is an easy procedure to show how a small change in …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Slope Stability Analysis & Risk by Finite Elements

The seminar started by briefly reviewing the power and advantages of the finite element method in tackling slope stability problems, especially in non-uniform soils. A closely related method called the Random Finite Element Method was described, which enables analyses to be made of slopes with highly non-uniform properties, in which the shear strength is described …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Applications & Benefits of Cold Spray-Applied Membranes

Cold spray-applied membranes are an economic and practical solution for waterproofing of buildings, tunnels, canals, ponds and reservoirs, and as gas vapour barriers over industrial sites and sites affected by landfill gases. Membrane technologies have produced materials that are easy to apply, non-toxic, odourless, solvent free, with seamless application and high strength and bonding characteristics. …more

Posted in 2003 Newcastle Meetings, Meeting, Newcastle |

Energy Method for Structures Interacting with Dissipative Soils

The combination of energy methods and variational principles has provided a valuable tool to analyze the behaviour of elastic structures for quite a long time. It has also been used infrequently to study soil-pile interaction problems, considering the soil as elastic material by following the traditional method that was developed for the elastic structures. However, …more

Posted in 2004 Newcastle Meetings, Meeting, Newcastle |

Regional landslide hazard maps of Tasmania

Land stability is a significant problem in parts of Tasmania but useful information outlining the spatial and temporal distribution of this hazard is limited. To address this problem a methodology has been developed to record known areas of instability and predict areas where various landslide process could occur in the future. Specifically the project models …more

Posted in 2004 Newcastle Meetings, Meeting, Newcastle |

Special Function

To celebrate the completion of the 2004 Geotechnical Design Project at the University of Newcastle, the Newcastle Chapter of the Australian Geomechanics Society invited its members to join the 4th year design students to a recovery function on 29 October 2004 (just after they submitted their major assignment work). It proved to be an excellent …more

Posted in 2004 Newcastle Meetings, Meeting, Newcastle |

Risk Assessment for Civil Engineering Systems

The talk presented an overview of how measures of risk can assess and manage the safety and performance of civil engineering systems such as dams, embankments and buildings. Typical measures of risk include the probability of system failure, annual fatality risk or expected damages or losses. Techniques for quantifying uncertainty and risk were described, as …more

Posted in 2004 Newcastle Meetings, Meeting, Newcastle |

A Study of Direct Shear Testing using a Large Shear Box

Reinforced soil walls are finding increasing application in Australian civil engineering infrastructure. The commonly applied Q181C ‘Test Method’ of Direct Shear Testing to estimate the ‘Effective angle of internal friction at constant volume conditions for granular (coarse grained) materials’ is commonly applied to assess the suitability of backfill soils. This presentation presented the outcomes of …more

Posted in 2004 Newcastle Meetings, Meeting, Newcastle |

Geosynthetics in Reinforced Earth Structures

The presentation provided a brief overview of the world of Geosynthetics and latest technologies, with an emphasis on reinforced soil structures and other typical civil engineering applications. Some interesting case studies, local and abroad, were briefly discussed. Innovative technologies in the field were also looked at, including instrumentation using geosynthetics and the use of poor-draining …more

Posted in 2004 Newcastle Meetings, Meeting, Newcastle |

Geotechnical Stability Analysis: New Methods for an Old Problem

In practice, geotechnical stability analysis is usually performed by a variety of approximate methods that are based on the notion of limit equilibrium. Although they appeal to engineering intuition, these techniques have a number of major disadvantages, not the least of which is the need to presuppose an appropriate failure mechanism in advance. This feature …more

Posted in 2004 Newcastle Meetings, Meeting, Newcastle |