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Research project (§ 26 & § 27)
Duration : 2021-12-01 - 2022-11-30

ÖBB-Infrastruktur maintains and operates about 150 tunnel structures with an age of more than 100 years. The majority of these are masonry tunnels whose lining can be of various types (e.g. quarry stone masonry, brick masonry, concrete molds). Damage caused, for example, by aging and influences from operation as well as requirements for current clearance specifications require in part extensive repair or renewal measures on the existing masonry. These measures, some of which are carried out during ongoing rail operations, are usually accompanied by a temporary weakening of the existing tunnel vault. In this research project, monitoring systems are to be developed that can be used reliably and economically in the course of vault repairs of old masonry tunnels under tunnel conditions.
Research project (§ 26 & § 27)
Duration : 2022-10-15 - 2024-10-14

In the course of climate change, the framework conditions for agricultural production will change significantly. The ability of the soil to absorb water quickly and efficiently on the one hand and to store as much water as possible in a plant-available form on the other are prerequisites for maintaining agricultural production potential, even under changing climate conditions. The ClimZIEGEL project deals with the application of recycled brick sand in agriculture as a climate change adaptation measure. Under aspects of a circular economy, the ClimZIEGEL project is investigating how valuable soil and water resources can be protected and effectively used by introducing recycled brick sand into the agricultural production cycle. In the first phase, micro- and mesoscale laboratory and field tests will be carried out on the water storage capacity of soil-brick mixtures and their interaction with plants. The results will subsequently (phase 2) be used for the planning and implementation of a field trial on a macro scale. Plant condition and growth will be observed dynamically over an annual cycle and will be the basis for regional modelling with regard to soil water balance, microclimatic effects, erosion control and life cycle assessment. The project results are summarised in the form of an integral assessment and recommendations for action for Lower Austria are derived from it.
Research project (§ 26 & § 27)
Duration : 2022-07-01 - 2024-06-30

DRAGON is a follow-up project to VIGILANS and addresses the open questions that arose from VIGILANS to achieve an improved hazard analysis of slow slope movements for society. To determine the hazard potential of different deformation types, the depth and geometry of the fracture surface (sliding surface) is determined using the vector inclination method (VIM) based on 3D motion vectors obtained by combining 2D InSAR data (Sentinel-1 and TerraSAR-X) with ground-based InSAR data (GB-InSAR). In addition, Envisat and Sentinel-1 analyses are used to retrospectively determine the slope deformation trajectories for the two selected active slope movements (Steinlenen & Malgrube, Tyrol) for the past twenty years. This allows to assess whether the documented spontaneous rockfall events are directly coupled to the progressive failure of the large slope movements. Time series analyses will identify potential acceleration phases and will be compared with meteorological data series. Due to the known, complex motion behavior of deep-seated slope deformations, it is important to adopt a research approach that integrates multiple technologies and platforms. DRAGON combines for the first time satellite data with ground-based remote sensing (GB-InSAR, TLS, tacheometry, drone photogrammetry) and in situ measurements (D-GNSS, convergence measurements, seismic monitoring). The goal is to create a three-dimensional kinematic model for the two large slope movements that is as accurate as possible and reflects the results of the different measurements and also allows a forecast of the further course of the slope failure. The results form an important contribution to the process understanding of deep slope deformations and can be applied to a large number of mass movements of this type.

Supervised Theses and Dissertations