The British Geotechnical Association (BGA) is the principal
association for geotechnical engineers in the United Kingdom.
The British Geotechnical Association (BGA) is the principal
association for geotechnical engineers in the United Kingdom.
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BGA on-line Meeting: The Engineering Geology of the Thames Tideway Tunnel and its Effects on Construction Performance presented by Tim Newman of Jacobs. This is a joint meeting of the BGA and the Engineering Group of the Geological Society (EGGS).
Speaker: Professor H. F. Schweiger (TU Graz)
Summary: Although limit equilibrium analyses currently dominate in practical geotechnical engineering to obtain factors of safety of natural and cut slopes, the finite element method is increasingly being used to calculate ultimate limit states and consequently factors of safety, usually by means of the so-called “strength reduction” technique. In many cases results obtained from the strength reduction approach are comparable to the those obtained with limit equilibrium methods, but in some cases significant differences are observed. By comparison with rigorous limit analyses, it is at first demonstrated that the strength reduction method is a reliable method for analysing failure of slopes. Secondly, it is shown that finite element analyses are superior to limit equilibrium analyses in assessing ultimate limit state conditions. Finally some guidelines for performing strength reduction analyses are given.
BGA Evening Meeting: the 2020 John Mitchell Lecture will be delivered by Martin Preene on 'Thinking Conceptually about Groundwater Problems'
The Chalk aquifer is a strategic resource for the water supply across ~21,500 km2 of the UK and is increasingly under pressure from changes in demand due to climate change.
Tony will discuss how his work in the field and lab aim to further understanding and characterisation of development of weathering in the chalk unsaturated zone (CUZ). Evaluating permeability and porosity in respect to flow regime, and geomechanical changes.
Tony is currently a PhD researcher at Imperial College London within the Geotechnics Cluster.