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Research project (§ 26 & § 27)
Duration : 2018-06-01 - 2021-05-31

Slope Deformations often emerge as large-scale slope instabilities affecting entire valley flanks, reaching several hundreds of 100–300 m in depth. These slow movements may move only few millimetres per year and their activity status is often unknown. Furthermore, over the last decade, research have identified the importance of studying these slope instabilities as long-term processes switching between periods of activity and inactivity, with the reactivations potentially causing localized catastrophic failures such as partial slope failure systems, rock falls, debris flows and rock avalanches out of mountain slope deformations. VIGILANS will develop and establish a monitoring system for active slope deformations based on spaceborne InSAR and UAV-P methods. We will quantify the accuracy and uncertainty of the novel monitoring systems and test complementary to existing instrumentation in geometrically difficult mountainous environments. A qualitative comparison of InSAR and UAV-P uncertainties applied to slope deformation monitoring is essential in the long term to achieve acceptance for these promising methods for market applications. The integration of stakeholder needs, responsible authorities and parties to improve risk management of slope deformations are an essential component of VIGILANS.
Research project (§ 26 & § 27)
Duration : 2018-01-01 - 2021-02-28

Large-scale landslides are common phenomena in the Alps that possess potential hazard to human lives and infrastructures. Just recently, a dramatic event causing several fatalities occurred in Bergell (Switzerland) last summer. In order to perform comprehensive hazard assessment and risk mitigation, it is therefore essential to identify and profoundly understand the behaviour of landslide processes. In the framework of the dissertation thesis of Christina Rechberger, M.Sc., an active deep-seated rockslide at Marzellkamm in Vent, Tirol is comprehensively investigated. The aim of this project is the characterization of the kinematics, the temporal variable deformation behaviour and the determination of the hydro-mechanical processes with regard to glacier retreat. Therefore, a comprehensive monitoring system will be installed which comprises a) extensometers and cameras for continuous surveillance, b) regular tachymetric survey campaigns of installed reflectors, c) remote sensing data from ortho-images and laserscanner measurements (ALS-/TLS-measurements). The designed monitoring system is described in more detail in the proposal submitted to the Austrian Society for Geomechanics.
Research project (§ 26 & § 27)
Duration : 2017-09-20 - 2020-09-19

Based on the chemical composition and boundary conditions in drainage-pipes, massive precipitation of sinter deposit may occur. Due to this sinter process, the free cross-section of drainage pipes can be significantly reduced. Ultimately, this can lead to insufficient draining of water and media in tunnels, increasing the risk of damage to the structure. Therefore, drainage pipes in tunnels have to undergo maintenance and cleaning procedures on a regular base. Pipe cleaning procedures in pipes are not only very costly and time consuming, but can also further damage the drainage pipes themselves. Damaged surfaces of drainage pipes can in return accelerate the growth of sinter deposits, increasing the amount of cleaning procedures necessary to uphold the function of the whole system. In addition, repetitive cleaning poses the danger of completely destroying the pipes due to high forces and impact damage during the cleaning procedures. This worst-case scenario requires the exchange of the whole drainage-system which can only be achieved via massive construction works in the tunnel systems. To reduce the problems which are accompanied by increased cleaning efforts, aim of this project is the development of new pipe materials. These should not only be more resistant against necessary cleaning procedures, but, in best case, can also actively obstruct the formation of sinter deposits. Modifying commercial polymer grades by adding special additives can be used to specifically change the properties of pipe grade plastics. By producing special compounds, properties such as toughness, surface hardness, surface tension or electronegativity can be altered. By thoroughly investigating the influence of mechanical, chemical or physical parameters of the material on the speed of sinter formation, it should be possible to develop materials which satisfy the special requirements of drainage pipes in tunnel applications.

Supervised Theses and Dissertations