stress-driven

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Category: Research (page 1 of 3)

An uncommon look at frost wedging in the lab under ‘autumn’, ‘winter’, and ‘spring’ conditions

Frost wedging describes the process by which pressure from the expansion of freezing water in pre-exising fractures generates sufficient tensile stress to propagate the crack further into intact rock. Although this seems like a reasonably common sense interpretation (given the transition from water to ice involves a 9% expansion that’s often associated with the bursting […]

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MSc Jonas von Wartburg: Constraining the age and source area of the Molveno landslide deposits in the Brenta Group, Trentino Dolomites.

Candidate: Jonas von Wartburg Supervisors: Susan Ivy-Ochs, Kerry Leith, Prof. Dr. Silvana Martin (U. Padua) Institution: ETH Zurich, University of Padua Activity: Beginning Fall 2017 Introduction A detailed understanding of prehistoric landslides provides fundamental information on the inherent causes of massive rock slope failures in the Alps. In Trentino, a key issue in assessing hazards from rock wall […]

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Find me at EGU 2017

As usual, there’s plenty happening at EGU this year. You can find me at any one of these locations: Monday Mon, 24 Apr, 15:30–15:45, Room N1, GM1.6/BG9.38/HS11.11/NH8.8/TS4.7 | | Highlight Dynamic fracture development in response to extreme summer temperatures: 27/7/2014, Långören Island, Finland (EGU2017-16387) by Kerry Leith, Matthew Perras, Topias Siren, Tuomas Rantanen, Suvi Heinonen, […]

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Reconnaissance of ongoing fracturing in the Bedretto tunnel

An important aspect of our envoronmentally-driven fracturing project is a study of ongoing fracturing under relatively stable conditions in the 50 year old Bedretto tunnel. Yesterday Matthew Perras, Prof. Kurosch Thuro (Technical University of Munich), and myself made the first reconnaissance of the 5 km long tunnel and collection of baseline data from a recently […]

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A new SFM model for our Finland field site

Before the winter set in and a long twilight fell on the Finnish archipelago a group of us from ETH Zurich and Aalto University ventured out to Langören island to winterize the measuring equipment and gather data for numerical and structural analyses of the fracturing events. Following from a recent paper from Gonçalves et al. […]

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A documentary on work leading up to the GlacierRocks project

Find out more with the following links:

Homepage: http://www.georesearch.at/de/bereiche/forschungsbereiche/geo/projekt-glacierrocks
Facebook: https://www.facebook.com/georesearch/
ResearchGate: https://www.researchgate.net/project/GlacierRocks-Glacier-Headwall-Interaction-and-its-Influence-on-Rockfall-Activity
LinkedIn: https://www.linkedin.com/company-beta/17889341/

MSc Stefanie Diener: Environmental controls on bedrock fracturing and rockfall production adjacent to the rapidly thinning Schmiedingerkees glacier (Hohe Tauern Range, Austria)

Candidate: Stefanie Diener Supervisors: Kerry Leith, Dr. Matthew Perras, Ingo Hartmeyer (GEORESEARCH Forschungsgesellschaft mbH) Institution: ETH Zurich Activity: Beginning Fall 2017 Since 1880 mean annual air temperatures in Austria have risen by 2 °C, more than twice the average global warming of 0.85 °C. Glacier retreat has evolved into one of the most visible consequences of this climatic change […]

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MSc opportunity: Monitoring progressive fracture propagation in response to environmental stress variations

Candidate: Open Supervisors: Kerry Leith, Dr. Matthew Perras, Valentin Gischig Institution: ETH Zurich Activity: Beginning Fall 2017 Exceptionally warm summer temperatures in northern Europe during the summer of 2014 were accompanied by active fracturing and small rockbursts from flat-lying postglacial bedrock surfaces on a small Finnish Island. Employing a new portable acoustic emission detection system, this project will investigate […]

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Research project: Static and cyclic load compression tests under controlled climatic conditions

Matthew A PerrasSimon LoewKerry Leith We aim to advance the frontier of progressive rock failure combining laboratory data derived from new custom built creep testing machines (capable of regulating temperature, humidity, and mechanical load over at least 100 days) with measurements from existing field equipment. Initial testing will be focused on unique natural and man-made […]

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Research project: GlacierRocks – Glacier-Headwall Interaction and its Influence on Rockfall Activity

Ingo HartmeyerMarkus KeuschnigJan-Christoph Otto Kay HelfrichtKerry Leith Michael Krautblatter Institutions: GEORESEARCH Forschungsgesellschaft mbH, University of Salzburg, Technische Universität München, Austrian Academy of Sciences, ETH Zurich Goal: The proposed project GlacierRocks will establish the worldwide first research site for long-term monitoring of stability-relevant processes inside a randkluft system. Based on the acquired monitoring data GlacierRocks is pursuing […]

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