Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
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Zizka, Zdenek; Kube, Sebastian; Schößer, Britta; Thewes, Markus | Influence of stagnation gradient for face support calculation in Slurry Shield Tunnelling - Type of slurry pressure transfer mechanism expressed in terms of stagnation gradient f | Geomechanics and Tunnelling | 4/2020 | 372-381 | Topics |
KurzfassungIn slurry shield tunnelling, a reliable face support is presumed if a sufficient support pressure is transferred and the slurry excess pressure provides efficient support pressure on the soil skeleton. The required support pressure is calculated in reference to the groundwater pressure and the earth pressure. In this paper, the sliding wedge mechanism is applied. To ensure face stability, the support pressure transfer needs to be provided within the theoretical sliding wedge at the tunnel face. Therefore, the penetration depth of the bentonite suspension as a support medium has to be kept within limits. Research shows that certain penetration is required. x | |||||
Gilgen, Samuel; Weh, Markus | Eppenberg tunnel: Hydroshield TBM drive in highly permeable soils above the groundwater table - Unexpected problems and their solution / Hydroschildvortrieb über dem Grundwasserspiegel in hoch durchlässigen Schottern am Eppenbergtunnel - Unerwartete Probleme und ihre Lösung | Geomechanics and Tunnelling | 4/2020 | 382-398 | Topics |
KurzfassungAs part of the four-track improvement of the Zurich-Berne line near Aarau, the 3.1 km long Eppenberg Tunnel was bored using a multi-mode TBM. This involved driving more than 700 m in highly permeable soils, mostly above the groundwater table. The hydroshield drive was confronted with considerable problems. The static yield point of the bentonite slurry repeatedly fell below the critical limit of 10 N/m2, despite its frequent replacement. As a result, large quantities of slurry penetrated into the ground and large quantities had to be replaced. In addition, significant additional grout quantities were repeatedly observed for the filling of the annular gap. A systematic and analytical approach in cooperation with all parties involved made it possible to determine the behaviour of the system. Problems started with highly permeable open-framework gravel layers, which permitted the slurry to penetrate far into the ground. This resulted in overbreak in the crown and local underpressure of the slurry with respect to the grout around the shield. Consequently, the annular gap grout flowed past the shield tail seal and destroyed the thixotropic properties of the slurry by adding free Ca cations. The slurry became unusable and had to be replaced. An extensive set of measures finally made it possible to solve the problems and safely bring the excavation to breakthrough. x | |||||
Bäppler, Karin; Strässer, Michael | Forrestfield Airport Link Project - Challenges and TBM solution | Geomechanics and Tunnelling | 4/2020 | 401-405 | Topics |
KurzfassungA large number of successfully completed tunnelling projects in sensitive environments and airport areas show the highest technical and quality standards of mechanized tunnelling technology, mastering project challenges and individual tasks in the interest of customers, clients and the environment. The Forrestfield Airport Link, currently under construction in Perth, Australia, is one of these projects tackling challenges in an airport area sensitive to any kind of settlement and subsurface conditions. The paper highlights the project challenges that require a well-adapted TBM concept and experience with the use of variable density TBM technology from the manufacturer's point of view. x | |||||
Hegemann, Felix; Stascheit, Janosch; Maidl, Ulrich | Digitalisation and IoT in mechanised tunnelling - an integral approach / Digitalisierung und IoT im maschinellen Tunnelbau - Ein integraler Ansatz | Geomechanics and Tunnelling | 4/2020 | 406-420 | Topics |
KurzfassungThe article presents a platform approach, in which the almost complete linking of machine data analysis, Building Information Modelling, document management system and digital ground models can be carried out in real time during a mechanised tunnel drive. All processes of mechanised tunnelling are digitalised and further processed in various applications in real time. The subsequent examples should demonstrate that there are now practically no application limits to the digitalisation of tunnel construction sites. Furthermore the potential and limits of artificial intelligence and machine learning are presented. x | |||||
Lühr, Hans-Peter | Geomembranes for tunnel constructions - Applications, properties and release of pollutants | Geomechanics and Tunnelling | 4/2020 | 421-430 | Topics |
KurzfassungThe sealing of tunnel walls involves the use of membranes which, depending on the situation, are constantly exposed to the leaching action of groundwater, or of water emanating from the surrounding rock. In terms of ecological product compatibility, the question arises as to whether pollutants may be released in the process. Various geomembranes are examined in more detail and subjected to an evaluation system. It emerges that in particular geomembranes with especially worrying components such as phthalates should generally be kept away from the environment for precautionary reasons, even though some phthalate plasticisers have not yet been evaluated by the EU. Phthalates are characterised by the fact that they are released from the membranes in considerable quantities. x | |||||
Eichinger, Stefanie; Leis, Albrecht; Boch, Ronny; Seywald, Christian; Dietzel, Martin | Assessment and formation mechanisms of scale deposits in tunnels of the ÖBB-Infrastruktur AG - A subproject of the Task Force Drainage / Bewertung von Sinter und deren Bildungsbedingungen in Tunnelbauwerken der ÖBB-Infrastruktur AG - Ein Teilprojekt der Task Force Drainage | Geomechanics and Tunnelling | 3/2020 | 273-285 | Topics |
KurzfassungScale deposit formation in drainage systems of railway tunnels represents a major challenge for their functionality and maintenance. The removal of these scale deposits causes high costs and restrictions of system availability. Effective measures to reduce scale deposit formation range from specification of the composition and structure of building materials to the application of tailored prevention and cleaning strategies. This requires advanced knowledge of the origin and type of scale deposits. The aim of this study is a systematic compilation, characterization, classification, and evaluation of scale deposits in relation to their formation mechanisms and the influence of variable environmental factors. The scale deposits from the 16 investigated tunnels mainly consist of the minerals calcite, aragonite, brucite as well as iron (hydr)oxides and detrital components. Four major types of scale deposits are distinguished: (i) unconsolidated-particulate, (ii) shard-like, (iii) porous, and (iv) compact scales. Types (ii) to (iv) show clear indications of microbial activity affecting the formation and appearance of individual deposits by various metabolic processes. The determining factors for the formation of scales - in addition to the geogenic composition of the aqueous solutions in the drainage system (groundwater / surface water) - are the variable interaction of these waters with the binding agents of the building materials used and the tunnel atmosphere. Geogenic conditions and technical-operational specifications of a tunnel determine the type and character of scale deposits, which can be actively influenced based on the case-specific reaction mechanisms by individual adaptations of environmental conditions. x | |||||
Steiner, Walter | Sulphate-bearing rocks in tunnels - Lessons from field observations and in-situ swelling pressures / Verhalten von Sulfatgestein im Tunnelbau - Erfahrungen aus Feldbeobachtungen und In-situ-Quelldrücke | Geomechanics and Tunnelling | 3/2020 | 286-301 | Topics |
KurzfassungTunnels and underground works in sulphate bearing rocks are very challenging. For more than a century experience has accumulated in Switzerland and southern Germany with difficult conditions during construction and operation, which show the difficult conditions with extreme, long lasting heave of the invert and extreme swelling pressures. The analyses of published experience over more than a century and recent personal experience led to the compilation of many pieces of a puzzle and to a better understanding of complex processes. The swelling processes in sulphate bearing rocks are triggered by the formation of flow path for water, the dissolution, concentration and precipitation of minerals. In particular Anhydrite is dissolved and the solution becomes saturated, until precipitation and crystallization of Gypsum starts. The applied construction methods play an important influence on the rock mechanics and geochemical processes and finally the magnitude of in-situ swelling pressures. The in-situ swelling pressure are still large, but substantially less than the swelling pressures from laboratory tests. Estimated swelling pressures will be indicated. x | |||||
Irmler, Ralf; Türtscher, Matthias; Hagenhofer, Hannes; Schweiger, Horst | From dust till dawn - Experience from 14 km of "dry tunnel drive" / From dust till dawn - Baubetriebliche Erfahrungen aus 14 Kilometer "Trockener Vortrieb" | Geomechanics and Tunnelling | 3/2020 | 302-312 | Topics |
KurzfassungAs part of the reorganization of the Stuttgart railway node, many tunnels had to be driven through the rock formation of gypsum Keuper (Grabfeld Formation), which contains anhydrite. In contact with water, the mineral anhydrite converts into the mineral gypsum with a resulting increase of volume. To prevent damage to the tunnel structure and the buildings above the tunnel as a result of this swelling process, the tunnelling work had to be carried out dry. No water was allowed for cleaning, drilling or for dust reduction. Dry tunnelling for hundreds of metres in this form and intensity is a novelty. There were no empirical values. In this article the special features of a dry tunnelling are presented. A target-actual comparison or geotechnical deformations should be deliberately avoided, although some peculiarities only result from changes to the contractual framework. x | |||||
Gschösser, Florian; Tautschnig, Arnold; Auderer, Stefan | Work-sampling studies applied for unit rate determination of labour-intensive tunneling processes | Geomechanics and Tunnelling | 3/2020 | 315-326 | Topics |
KurzfassungWork-sampling studies are typically applied to determine unit rates (a measure of construction labour productivity) for labour-intensive building construction processes. This study analyses how this methodology can be adapted for application to labour-intensive tunnelling processes, e.g. the construction of the inner lining. Therefore, first, the application of the work-sampling methodology for typical building construction process (wall formwork processes for a classical reinforced concrete building structure) was analysed. On this basis, a detailed work-sampling study for constructing the inner lining of a railway tunnel was prepared and performed. Thereby, the usage of a tablet computer was tested instead of analogue execution with paper forms. The study demonstrated that work-sampling studies allow the determination of average unit rates of tunnelling processes (for specific project and construction properties). Furthermore, the methodology allows to identify detailed unit rates with the goal to demonstrate specific influences (e.g. disturbances), which can be further utilized in construction and site management as well as claim management processes, such as the determination of productivity losses. However, the double analysis carried out for the tunnel inner lining (reinforcing and tunnelling workforce) and the size of the analysed workforces (up to ten workers) showed the limits for a one-person work-sampling study. x | |||||
Latal, Christine; Bach, Holger; Thuro, Kurosch | Application of test methods for tool wear in quality control of railway ballast / Anwendung von Werkzeugverschleißtests zur Qualitätssicherung von Bahnschotter | Geomechanics and Tunnelling | 3/2020 | 327-337 | Topics |
KurzfassungThe resistance of aggregates to abrasion estimated by the Micro-Deval test is an important mechanical parameter for aggregates used as railway ballast. At present, testing intervals are sparse due to the cost of the tests. Cost-efficient testing methods would be greatly appreciated. A detailed study of the applicability of alternative testing methods, as commonly used to estimate the potential of a rock or soil to cause wear to a tool (LCPC Abroy test and Cerchar test), demonstrates the advantage of implementing these testing methods in addition to the recommended tests. x | |||||
Ehrbar, Heinz; Franz, Stefan; Weiner, Thorsten; Fentzloff, Wolfgang; Frodl, Stephan | Digital Design, Building and Operation of Underground Structures - DAUB Recommendation for BIM in Tunnelling / Digitales Planen, Bauen und Betreiben von Untertagebauten - DAUB-Empfehlung zu BIM im Untertagebau | Geomechanics and Tunnelling | 2/2020 | 147-163 | Topics |
KurzfassungThe digitalisation of many areas of the economy is progressing, also in construction, where the intention is to provide information about built facilities for decision-makers concerning the design, building and operation of construction works in a consistently high quality, easily read and data-based. Until now, digitalisation in construction has been retarded by the high complexity of construction, which should however now rapidly change. The DAUB recommendation “Digital Design, Building and Operation of Underground Structures” is intended to make a contribution in this regard. x | |||||
Goger, Gerald; Bisenberger, Tobias | Digitalization in infrastructure construction - Developments in construction operations / Digitalisierung im Infrastrukturbau - Baubetriebliche Entwicklungen | Geomechanics and Tunnelling | 2/2020 | 165-177 | Topics |
KurzfassungTransport infrastructure is a fundamental cornerstone for mobility of the population and also functions as a motor for the economy. New digital methods along the value chain will be used to digitally support the process in the future, from the very first project idea, through tendering and construction to the maintenance of infrastructure projects. The four levers of digital transformation - data, automation, networks and access - will have a significant impact on this process in infrastructure construction. Networking of data sources and storage of data in off-grid databases is already possible, a development which enables project participants to analyse the construction data, process it and at the same time use it as a documentation basis during the development phase and for later maintenance measures. Such a well-founded digital database can be used to evaluate, optimize and completely document construction-related processes. This paper deals with various digital application areas in infrastructure construction and provides an overview of digitalisation developments in this field. x | |||||
Cudrigh-Maislinger, Susanna; Hruschka, Sabine; Niedermoser, Christoph; Torggler, Nathan; Steiner, Peter | Karawanken Tunnel northern section, conception and execution of a BIM pilot project / Karawankentunnel Nord, Konzept und Ausführung eines BIM-Pilotprojekts | Geomechanics and Tunnelling | 2/2020 | 178-189 | Topics |
KurzfassungThe BIM pilot project for the Karawanken Tunnel North consists of three main components, 3D modeling of the geological prognosis and actual conditions, the inner lining and inner components of the tunnel and the portal building and road elements at the portal. The pilot project was started when the preliminary design of the tunnel was already done. Only the portal building was done in BIM from the beginning. For the tunnel lining, the 3D modeling, quantity check and simplified 4D and 5D procedures together with the contractor were the main issues. A major effort had to be invested into data structuring following IFC and Asfinag requirements. Currently the tunnel is being advanced. Regular workshops are held to re-define the project targets and improve the achievement of the pilot project. x | |||||
Marcher, Thomas; Erharter, Georg H.; Winkler, Manuel | Machine Learning in tunnelling - Capabilities and challenges | Geomechanics and Tunnelling | 2/2020 | 191-198 | Topics |
KurzfassungDigitalization will change the way of gathering geological data, methods of rock classification, application of design analyses in the field of tunnelling as well as tunnel construction and maintenance processes. In recent years, a rapid increase in the successful application of digital techniques (Building Information Modelling and Machine Learning (ML)) for a variety of challenging tasks has been observed. Driven by the increasing overall amount of data combined with the easy availability of more computing power, a sharp increase in the successful deployment of techniques of ML has been seen for different tasks. ML has been introduced in many sciences and technologies and it has finally arrived in the fields of geotechnical engineering, tunnelling and engineering geology, although still not as far developed as in other disciplines. This paper focuses on the potential of ML methods for geotechnical purposes in general and tunnelling in particular. Applications such as automatic rock mass behaviour classification using data from tunnel boring machines (TBM), updating of the geological prognosis ahead of the tunnel face, data driven interpretation of 3D displacement data or fully automatic tunnel inspection will be discussed. x | |||||
Weichenberger, Franz Peter; Schwaiger, Christian; Höfer-Öllinger, Giorgio | From geological mapping to representation in BIM / Von der geologischen Aufnahme zur BIM-Repräsentation | Geomechanics and Tunnelling | 2/2020 | 199-211 | Topics |
KurzfassungStarting with geological field mapping in the tunnel, a process can be implemented to transform all geological observations into data structures for later use in BIM systems. All necessary basics are already available and a reference implementation has been programmed. When corresponding standards become available, which will be the case in the next one to two years, universal interchangeability of the information will also be provided. This will ensure that the ground model can be maintained through the life cycle, and the ground - as part of the Digital Twin of the structure - is available in later project phases like operation, maintenance, enlargement und renaturation. x | |||||
Alsahly, Abdullah; Hegemann, Felix; König, Markus; Meschke, Günther | Integrated BIM-to-FEM approach in mechanised tunnelling | Geomechanics and Tunnelling | 2/2020 | 212-220 | Topics |
KurzfassungIn current tunnelling practice, Finite Element (FE) simulations form an integral element in the planning and the design phase of mechanised tunnelling projects. The generation of adequate computational models is often time consuming and requires data from many different sources, in particular, when manually generated using 2D-CAD drawings. Incorporating Building Information Modelling (BIM) concepts offers opportunities to simplify this process by using geometrical BIM sub-models as a basis for structural analyses. This paper presents a Tunnel Information Model (TIM) as a BIM specifically tailored to fit the needs of mechanised tunnelling projects and a “BIM-to-FEM” technology, that automatically extracts relevant information (geology, alignment, lining, material and process parameters) needed for FE simulations from BIM sub-models and subsequently performs FE analysis of the tunnel drive. The results of the analysis are stored centrally on a data server to which the user has continuous access. A case study from the Wehrhahn-Metro line project in Düsseldorf, Germany, is presented and discussed to demonstrate the efficiency and the applicability of the proposed BIM-to-FEM workflow. x | |||||
Weil, Jonas | Digital ground models in tunnelling - Status, chances and risks / Digitale Baugrundmodelle im Tunnelbau - Status, Chancen und Risiken | Geomechanics and Tunnelling | 2/2020 | 221-236 | Topics |
KurzfassungDigital data acquisition and processing in geology and geotechnics are essential in all phases of a tunnelling project. This article describes typical work flows of engineering geology and the digital tools used, and discusses the requirements, chances and risks associated with the integration of ground models into BIM projects. The handling of factual data is depicted, but the main topic is the development and application of interpreted geological models for tunnelling. Aspects like the transferred information and its localisation, uncertainty of a prediction and requirements for formats, data structures and software environment are discussed. Efficient exchange and long-term usability of information demands clear definitions for the specialist models and use cases to be covered. x | |||||
Wenighofer, Robert; Waldhart, Johannes; Eder, Nina; Zach, Katharina | BIM use case - Payment of tunnel excavation classes - Example Zentrum am Berg / BIM-Anwendungsfall (AwF) Abrechnung-Vortrieb am Beispiel des Zentrums am Berg | Geomechanics and Tunnelling | 2/2020 | 237-248 | Topics |
KurzfassungBIM modelling of infrastructure works is controlled by a global market consisting of few software suppliers and is contingent upon the functions provided by them. Customization options furnished by the software suppliers often enable enhancement of functions, which is essential for infrastructure BIM although not completely available. This enables improved interoperability of the software tools used in this area. IFC is most likely to become an established international format for data exchange with its constant but also intricate further development. However, in underground infrastructure construction, both international and national standards are used and the integration of the latter in IFC cannot be anticipated. Hence, the implementation of BIM has to apply national standards in the use cases of collaborative data exchange among the different disciplines in tunnelling. In this contribution, the use case of payment of excavation classes and its implementation in a BIM environment are addressed. It discusses the interoperable interlinkage of software tools commonly used in construction to generate consistent digital data transfer and it underscores the need for an interdisciplinary agreement to integrate national standards into adequate practice for the implementation of BIM. x | |||||
Hofmann, Robert; Vollmert, Lars | Rockfall embankments: Construction and Design / Steinschlagschutzdämme: Konstruktion und Bemessung | Geomechanics and Tunnelling | 1/2020 | 21-31 | Topics |
KurzfassungThe introduction of Austrian standard ONR 24810 provides a design concept for earth dams to protect against massive rockfall events. The essential basis for the concept is the differentiation into five construction types of rockfall embankments due to different system behaviour. The structure therefore has to be assigned to one type at the beginning of the design process. The types available for selection are a simple earth dam (type I), a dam with quarry stone facing (type II), a geosynthetic-reinforced dam without increased crosswise distribution of the impact loads (type III), a geosynthetic-reinforced dam with increased crosswise distribution (type IVa) and with strongly increased crosswise distribution (type IVb) of the impact loads. Eurocode 7 (EC 7) is considered accordingly. The design concept is currently being discussed and used in Austria, Switzerland, Germany and Norway. Presented are the design principle and the construction as executive summary. x | |||||
Marte, Roman; Hofmann, Robert | Creeping large-scale landslides - Characterisation and assessment of safety / Kriechförmig verlaufende Großmassenbewegungen - Charakterisierung und Bewertungen des Sicherheitszustands | Geomechanics and Tunnelling | 1/2020 | 32-51 | Topics |
KurzfassungThis article investigates to what extent a “condition and safety assessment” with a classically defined safety factor &eegr; (now partial safety factor or load factor) is useful or indeed possible for creeping slides of large masses as are often encountered in the Alps, or whether different quantities like the displacement rate and its change with time are more useful for the description of the condition of such large-scale slides. This discussion is held under the viewpoint that various procedures with different results are available for the determination of such a “safety factor” and consequently there are also justified discrepancies between experts in the assessment of such a “safety factor for the current state” of the moving slope. The authors are of the opinion that the partial safety factors required by standards or former “safety factors” are predominantly intended for engineering structures, earthworks and dams but not generally for creeping slopes. In this case, classification of creep rate and the geological engineering assessment are always preferred. This is illustrated with two examples. x | |||||
Nagl, Georg; Hübl, Johannes | Debris-flow impact and interaction with protection structures - Monitoring barrier at the Gadria torrent, Southern Tyrol / Einwirkung von Murgängen auf Schutzbauwerke - Das Messbauwerk am Gadriabach, Südtirol | Geomechanics and Tunnelling | 1/2020 | 52-56 | Topics |
KurzfassungThe interaction between a protection structure and an acting process (e.g. debris flow) has only been described in a few publications so far. In particular, the acting forces and stresses have only been measured under real conditions in a few cases. Therefore it was necessary to design a monitoring barrier that could measure both the process parameters and the forces involved and their transfer into the ground. Such a structure was built 2016 in the Gadria torrent (South Tyrol). Data has meanwhile been measured, recorded and evaluated from five debris flows. With flow heights up to 2 m, densities up to 2,200 kg/m3 and velocities between 1 and 6 m/s, the measured impact forces could be compared with the existing loading approaches. The findings serve as a basis for the improvement of approaches for the design of protection structures. x | |||||
Preh, Alexander | Falls originating from rock slopes - Runout evaluation using numerical models / Sturzprozesse ausgehend von Felsböschungen: Abschätzung der Reichweite mithilfe numerischer Modelle | Geomechanics and Tunnelling | 1/2020 | 59-73 | Topics |
KurzfassungRunout processes originating from rock slopes can be classified according to their process behaviour into rockfall, rock mass fall and rock avalanche. Their process behaviour is primarily determined by the volume of the detached rock mass, the degree of fragmentation of the moving mass and the morphology and nature of the runout path. The initial conditions of these processes depend on the initial failure mechanism. It is difficult to predict the runout and magnitudes of these types of rapid landslides since the complexity of the processes requires major simplifications in the calculation approaches. A good understanding of the process and clear mechanical model conceptions are therefore crucial in the development and choice of prediction models. The paper presents a classification of the runout processes originating from rock slopes on the basis of clearly defined mechanical models and provides an overview of the currently available models for prediction. x | |||||
Osten, Julian; Küppers, Jan; Dufresne, Anja; Huwiler, Andreas; Amann, Florian | Deep seated gravitational slope deformation of the southern Heinzenberg (Grison, Switzerland) / Tiefgreifende Hangdeformation am südlichen Heinzenberg - Geotechnical assessment of the refilling of the Lüschersee / Geotechnische Beurteilung der Wiederauffüllung des Lüschersees | Geomechanics and Tunnelling | 1/2020 | 74-87 | Topics |
KurzfassungA mass movement of several m/year towards the Nolla stream was detected at the southern Heinzenberg (Grisons, Switzerland) in the 19th century. Debris flows originating from the upper stream valley reached the Hinterrhein valley at irregular intervals, creating temporary dams, which raised the river > 10 m above normal levels. Since 1870, comprehensive mitiga tion strategies, including torrent control and drainage of the 3-ha Lüschersee lake situated in the landslide area, have reduced the deformation velocity to approx. 4.3 cm/year and prevented further debris flows. x | |||||
Hormes, Anne; Adams, Marc; Amabile, Anna Sara; Blauensteiner, Franz; Demmler, Christian; Fey, Christine; Ostermann, Marc; Rechberger, Christina; Sausgruber, Thomas; Vecchiotti, Filippo; Vick, Louise M.; Zangerl, Christian | Innovative methods to monitor rock and mountain slope deformation / Innovative Methoden zur Erfassung von Hangdeformationen | Geomechanics and Tunnelling | 1/2020 | 88-102 | Topics |
KurzfassungDisplacement rates of mountain slope deformations that can affect entire valley mountain flanks are often measured spatially distributed in-situ without spatial significance. The spatially explicit measurement and recording of time series of slope deformations is a challenge, as the unstable slopes are often disintegrated into several subdomains, which move with different deformation rates. The current state-of-the-art monitoring systems detect slow to very slow deformation rates between mm/a and several m/a. Using the examples of slope deformations in Saalbach-Hinterglemm and the deep rock slide Marzellkamm in Austria this paper presents the results of terrestrial laser scans, extensometer measurements, Spaceborne InSAR data, unmanned Aerial System Photogrammetry (UAS-P), and fixed-point measurements. The different measurements complement each other and are optimally aligned for different application areas. InSAR data can help to identify hot spots on regional and local scale, while UAS-P enables for spatially high level accuracy in the detection of subdomains moving at different speeds. For local warning systems TLS, extensometers and GBInSAR deliver higher accuracy. x | |||||
Thuro, Kurosch; Singer, John; Menschik, Bettina; Breuninger, Tamara; Gamperl, Moritz | Development of an early warning system for landslides in the tropical Andes (MedellÃn; Colombia) / Entwicklung eines Frühwarnsystems für Rutschungen in den tropischen Anden (MedellÃn, Kolumbien) | Geomechanics and Tunnelling | 1/2020 | 103-115 | Topics |
KurzfassungThe Inform@Risk project aims to develop a cost-effective but sufficiently accurate, easy-to-maintain early warning system (EWS) for informal settlements on the margins of large cities, adapted to tropical climatic conditions in South American mountain regions. This EWS will be implemented on the outskirts of the Bello Oriente district in Medellín. The area is characterized by an elevation of around 2,000 m, a medium slope inclination of 20° to 30° and deeply weathered crystalline rocks, which are particularly sensitive to shallow landslides during heavy precipitation. In addition to the development of a geo-sensor network with complex data integration and real-time evaluation, the main focus of the project is the social integration of the EWS both with the municipal authorities, which are going to take over the system after completion of the three-year project, and with the population living in the settlement. This report describes the project and the specifications of the EWS and presents first results from the field work. x |