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Dissertations / Theses on the topic 'Rockfalls'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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1

Ruiz, Carulla Roger. "Rockfall analysis : failure, fragmentation and propagation characterization : a fractal fragmentation of rockfalls." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/620792.

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The present thesis aims at the analysis of the fragmentation of rockfalls. The fragmentation is a complex phenomenon poorly understood with a lack of tools to reproduce it on rockfall simulators. The effect of fragmentation on the hazard assessment and mapping is significant and it may substantially modify the risk scenario. The analysis of the empirical data acquired in a series of inventoried natural rockfalls and real-scale drop tests, clearly suggests that fragmentation displays a fractal behavior. Based on these observations, a fractal fragmentation model is proposed heare, adapting the b
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2

Matas, Casado Gerard. "Modelling fragmentation in rockfalls." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/671188.

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The fragmentation process in rockfalls is a complex phenomenon that is not well understood and only a few rockfall simulation models consider it explicitly. Fragmentation significantly affects the evaluation of the hazard and therefore of the risk. This thesis aims to develop a rockfall propagation model that is capable of reproducing the fragmentation phenomenon in rockfalls and to assess its consequences in the risk analysis. Four real-scale tests in a quarry and one laboratory test were performed for a better understanding of the fragmentation process. During these tests, several remote sen
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3

Thorbjörnson, Lind Thomas. "Rockfalls from rock cuts beside Swedish railroads : A full scale fieldtest, to investigate rockfalls and how rock bounces." Thesis, KTH, Jord- och bergmekanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-185583.

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Rockfalls is a major problem around the world, if they occur in populated areas, they can cause major damage to infrastructure, injure or kill people. For this reason, it is important to be able to predict where the risk of rockfalls and how to prevent and protect populated areas from them. However, it is no easy task to predict rockfalls. Although if an area with potential area for rockfall is localized it may seem easy to construct protective meshing or bolting potential blocks down. But in many cases this is not easy to do due to practical issues or economic reasons, for example in rock cut
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4

Nedilko, Bohdan. "Seismic detection of rockfalls on railway lines." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58097.

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Railway operators mitigate the risk of derailments caused by hazardous rocks falling onto the track by installing slide detector fences (SDF). These consist of electrical sensing wires strung on poles located uphill of the track; falling rocks snap these wires and trigger an alarm. Rocks of non-threatening size and migrating animals frequently break the wires causing prolonged false alarms and delaying rail traffic until the SDF is manually repaired, often in a hazardous environment. This thesis is concerned with the development of a prototype of the autonomous Seismic Rockfall Detection Syste
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5

Kuehnert, Julian. "Simulation of High Frequency Seismic Waves generated by Rockfalls on Real Topography." Thesis, Université de Paris (2019-....), 2019. https://theses.md.univ-paris-diderot.fr/KUEHNERT_Julian_va2.pdf.

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Les risques d'éboulements doivent être évalués et surveillés afin de prévenir les pertes de vies humaines et dommages aux infrastructures. A cet égard, il est important de créer des catalogues d'événements et de comprendre la dynamique des éboulements. Les ondes sismiques peuvent être utiles à cette fin, car elles transmettent des informations précieuses sur l'événement. Elles sont générées lorsque des éboulements touchent le sol et peuvent être utilisées pour détecter, classer et localiser des événements. Plus encore, on peut déduire des propriétés des éboulements telles que leur volumes et l
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6

Domènech, i. Surinyach Guillem. "Assessment of the magnitude-frequency relationship of landslides and rockfalls : application to hazard mapping." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/347218.

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Due to the exponential grown of the population within the last decades, the landslide hazard assessment of earthflows and rockfalls and their hazard mapping have become an essential tool for the territory management, mostly in mountainous areas. The landslide hazard was defined as the probability of occurrence of a potentially damaging phenomenon in a certain area and within a given period of time. Thus, the probability of occurrence (or frequency) for each type of landslide and magnitude must be known. The aim of this research is to develop an objective, quantitative and reproducible method
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7

Stevens, Warren Douglas. "RocFall, a tool for probabilistic analysis, design of remedial measures and prediction of rockfalls." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq40928.pdf.

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8

Admassu, Yonathan. "Developing Design Methodology for Cut Slopes in Ohio." Kent State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1279208895.

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9

D'amato, Julie. "Apport d'une base de données d'éboulements rocheux obtenues par scanner laser dans la caractérisation des conditions de rupture et processus associés." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAU025/document.

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Ce travail de thèse a consisté à établir une base de données d'éboulements rocheux la plus exhaustive possible (pour des volumes supérieurs à 0,1 m3) pour une paroi rocheuse active dominant l'agglomération grenobloise, en utilisant des données de scanner laser et de photographie. Le site d'étude est une falaise calcaire de plusieurs kilomètres en bordure du massif de la Chartreuse, constituée de deux barres de morphologies différentes, l'une en calcaire lité, l'autre en calcaire massif.Les nuages de points issus du scanner laser permettent de reconstituer la falaise et les compartiments éboulé
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10

Gallach, Xavi. "Reconstitution de la fréquence des écroulements rocheux post-LGM dans le Massif du Mont-Blanc." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAU041/document.

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La haute montagne est un terrain particulièrement sensible aux variations climatiques. La hausse de température depuis plusieurs décennies a un fort impact sur les parois du massif du Mont Blanc : la dégradation du permafrost s’y traduit par une activité gravitaire majeure. Une augmentation du nombre d'écroulements (>100 m3) liés à des périodes chaudes a en effet été mis en évidence à plusieurs échelles de temps, lors des étés particulièrement chauds de 2003 et 2015 comme au cours des trois dernières décennies. La fréquence des écroulements dans le massif devrait continuer à s’accroitre ave
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11

Le, Roy Gaëlle. "Détection et caractérisation multi-méthodes des éboulements rocheux." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALU012.

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Parmi les mouvements de terrain, les éboulements rocheux restent le danger le plus imprévisible et le plus fréquent en région alpine. Dans un contexte d'urbanisation croissante des régions montagneuses, les éboulements représentent un risque croissant pour les communautés locales et les infrastructures. Cette thèse vise à développer une association pertinente de méthodes pour la surveillance des éboulements en couplant des mesures de relief à un suivi sismologique, afin d’améliorer la compréhension de la dynamique des éboulements. Ce travail a été principalement réalisé dans le massif de la Ch
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12

Rose, Brett Tyler. "Tennessee Rockfall Management System." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29263.

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The Rockfall Management System developed for Tennessee DOT (TennRMS)integrates a customized rockfall risk rating system, web-based GIS application, and rockfall database to provide a robust single interface for interacting with rock slope information. The system should prove to be a valuable tool for the proactive management of rock slopes. The most important use of the system will be to identify and prioritizing rock slopes with the greatest potential for rockfall in order to provide decision makers with all the necessary information they need to plan remediation efforts. Over time, TennRMS c
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13

Cain, Samuel Franklin. "Rating Rockfall Hazard in Tennessee." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9972.

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Rockfall from rock slopes adjacent to roadways is a major hazard and poses a problem for transportation agencies across the country. The state of Tennessee has implemented the Tennessee Rockfall Management System (RMS) as a means of reducing the liabilities associated with rockfall hazard. It utilizes digital data acquisition via PDAs coupled with distribution via an expandable web-based GIS database. The Tennessee Rockfall Hazard Rating System (RHRS) is part of the Tennessee RMS and assigns a numeric hazard rating according relative hazard for all slopes identified as having a high potential
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14

Benjamin, Jessica. "Regional-scale controls on rockfall occurrence." Thesis, Durham University, 2018. http://etheses.dur.ac.uk/12813/.

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Rockfalls exert a first-order control on the rate of rock wall retreat on mountain slopes and on coastal rock cliffs. Their occurrence is conditioned by a combination of intrinsic (resisting) and extrinsic (driving) processes, yet determining the exact effects of these processes on rockfall activity and the resulting cliff erosion remains difficult. Although rockfall activity has been monitored extensively in a variety of settings, high-resolution observations of rockfall occurrence on a regional scale are scarce. This is partly owing to difficulties in adequately quantifying the full range of
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15

Dupire, Sylvain. "Evaluation des effets des incendies sur la capacité de protection des forêts contre les chutes de blocs dans les Alpes françaises." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI020/document.

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Les chutes de blocs constituent un aléa naturel majeur dans les Alpes françaises en raison de leur probabilité d'occurrence spatiale et temporelle très élevée. Les forêts peuvent constituer une solution naturelle et efficace pour atténuer ce phénomène tout en protégeant les populations et leurs infrastructures. Cependant, ce service écosystémique peut être perturbé par d'autres aléas naturels comme les feux de forêts, susceptibles d'être plus fréquents et intenses dans le contexte actuel et futur de changements climatiques.Cette thèse propose ainsi d'évaluer les effets des incendies sur la cap
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16

Jacklitch, Carl Jonathan. "A Geotechnical Investigation of the 2013 Fatal Rockfall in Rockville, Utah." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1464978379.

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17

Schellenberg, Kristian. "On the design of rockfall protection galleries /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17924.

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18

Peng, Baishan. "Rockfall Trajectory Analysis : Parameter Determination and Application." Thesis, University of Canterbury. Geological Science, 2000. http://hdl.handle.net/10092/5802.

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Computer simulation of rockfalls has been widely used in rockfall analysis in recent years, and the coefficient of restitution is an important parameter input that is difficult to determine. Aimed at finding an easy solution to this problem, three stages of laboratory and field tests have been carried out. Rockfall trajectory analysis at a specific site has been done as an application to verify the method developed. In the first stage of laboratory testing, quasi-spherical rock "'balls" made from different rock samples were dropped from 1 m onto polished rock slabs that were clamped on a conc
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19

Musa, Abdisa. "Evaluation Of Concrete Barrier As Rockfall Protection." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1430503509.

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20

Williams, Jack Gordon. "Insights into rockfall from constant 4D monitoring." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/12172/.

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Current understanding of the nature of rockfall and their controls stems from the capabilities of slope monitoring. These capabilities are fundamentally limited by the frequency and resolution of data that can be captured. Various assumptions have therefore arisen, including that the mechanisms that underlie rockfall are instantaneous. Clustering of rockfall across rock faces and sequencing through time have been observed, sometimes with an increase in pre-failure deformation and pre-failure rockfall activity prior to catastrophic failure. An inherent uncertainty, however, lies in whether the
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21

Chikatamarla, Ravikiran. "Optimisation of cushion materials for rockfall protection galleries /." Zürich : ETH, 2005. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16315.

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22

Wong, Kai-fat, and 王啟發. "Review of rockfall mitigation measures in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B42576088.

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23

Glover, James Michael Harvey. "Rock-shape and its role in rockfall dynamics." Thesis, Durham University, 2015. http://etheses.dur.ac.uk/10968/.

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Rockfall threaten infrastructure and people throughout the world. Estimating the runout dynamics of rockfall is commonly performed using models, providing fundamental data for hazard management and mitigation design. Modelling rockfall is made challenging by the complexity of rock-ground impacts. Much research has focused on empirical impact laws that bundle the rock-ground impact into a single parameter, but this approach fails to capture characteristics associated with the impact configuration and, in particular, the effects of rock-shape. While it is apparent that particular geological sett
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24

Wong, Kai-fat. "Review of rockfall mitigation measures in Hong Kong." Click to view the E-thesis via HKUTO, 2001. http://sunzi.lib.hku.hk/hkuto/record/B42576088.

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25

Mentani, Alessio <1983&gt. "Modelling the dynamic response of rockfall protection barriers." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7170/1/mentani_alessio_tesi.pdf.

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Mountainous areas are prone to natural hazards like rockfalls. Among the many countermeasures, rockfall protection barriers represent an effective solution to mitigate the risk. They are metallic structures designed to intercept rocks falling from unstable slopes, thus dissipating the energy deriving from the impact. This study aims at providing a better understanding of the response of several rockfall barrier types, through the development of rather sophisticated three-dimensional numerical finite elements models which take into account for the highly dynamic and non-linear conditions of suc
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26

Mentani, Alessio <1983&gt. "Modelling the dynamic response of rockfall protection barriers." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7170/.

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Mountainous areas are prone to natural hazards like rockfalls. Among the many countermeasures, rockfall protection barriers represent an effective solution to mitigate the risk. They are metallic structures designed to intercept rocks falling from unstable slopes, thus dissipating the energy deriving from the impact. This study aims at providing a better understanding of the response of several rockfall barrier types, through the development of rather sophisticated three-dimensional numerical finite elements models which take into account for the highly dynamic and non-linear conditions of suc
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27

Jonsson, Martin Joel Oskar. "Energy absorption of trees in a rockfall protection forest /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17214.

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28

Whadcoat, Siobhan Kathleen. "Numerical modelling of rockfall evolution in hard rock slopes." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/11994/.

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The aim of this thesis has been to model small rockfalls in order to better understand where, when and why they occur. High-resolution monitoring of rock slopes has revealed clustering of rockfalls through space and time, suggesting interactions, whereby one detachment from a rock slope influences the nature of those that follow. This observation contrasts with the more conventional idea of rockfalls as time-independent, discrete events that occur in response to an identifiable trigger. As the processes that give rise to observations of rockfall clustering are not well established, this thesis
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29

Dorren, Lucas Karel Agnes. "Mountain geoecosystems GIS modelling of rockfall and protection forest structure /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2002. http://dare.uva.nl/document/64355.

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30

Marchetty, Srikanth. "Analysis Of Rockfall Trajectories And Evaluation Of Concrete Barrier Efficiency." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1431019028.

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31

Kanari, Mor. "Evaluation of rockfall hazard to Qiryat Shemona - possible correlation to earthquakes." Jerusalem : Ministry of National Infrastructure. Geological Survey of Israel, 2008. http://www.gsi.gov.il/Eng/_Uploads/231GSI-24-2008.pdf.

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Thesis (Ph.D.)--Tel Aviv University, Department of Geophysics and Planetary Sciences,<br>This work was submitted as M.Sc. Thesis to the Department of Geophysics and Planetary Sciences, Tel Aviv University / T.P. "September 2008" At head of title: Tel-Aviv University. Raymond and Beverly Sackler faculty of exact sciences. Includes bibliographical references.
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32

Vick, Louise Mary. "Evaluation of field data and 3D modelling for rockfall hazard analysis." Thesis, University of Canterbury. Geological Sciences, 2015. http://hdl.handle.net/10092/10845.

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The Canterbury Earthquake Sequence (CES) of 2010-2011 produced large seismic moments up to Mw 7.1. These large, near-to-surface (<15 km) ruptures triggered >6,000 rockfall boulders on the Port Hills of Christchurch, many of which impacted houses and affected the livelihoods of people within the impacted area. From these disastrous and unpredicted natural events a need arose to be able to assess the areas affected by rockfall events in the future, where it is known that a rockfall is possible from a specific source outcrop but the potential boulder runout and dynamics are not understood. The
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33

Storey, Andrew Wilson. "Design Optimization of Safety Benches for Surface Quarries through Rockfall Testing and Evaluation." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/34810.

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The research presented in this thesis results from efforts to evaluate current design methodologies for safety benches in surface aggregate quarries. Proper bench design is important for preventing rockfall related accidents and injuries without wasting the reserves held in the benches. An in depth analysis has been performed using the results from 230 rockfall tests conducted at two surface quarries. The goal of this project is to give practitioners the tools they need for improved bench design. Principal Components and Cluster Analysis, techniques not previously applied to rockfall inves
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34

Farrand, Steven Wesley. "Rockfall Modelling Parameters and the Control Barrier at Stockton Mine, New Zealand." Thesis, University of Canterbury. Geological Sciences, 2007. http://hdl.handle.net/10092/3520.

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Solid Energy New Zealand plans to mine a 6 to 10m thick coal seam below the Mt. Augustus and Mt. Fredrick ridgeline at Stockton Mine near Westport, NZ. The coal is covered by up to 30m of overburden, which requires removal to access 4 million tones of high quality coal. However, the Coal Mining Lease boundary (CML) is located just below the basal coal measures and the neighbouring land is owned by the Department of Conservation (DoC). In addition, the neighbouring DoC estate is Powelliphanta Augustus snail habitat. It is necessary to remove the overburden without releasing any material above n
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35

VALENTE, FABRICIO. "NUMERICAL ANALYSIS OF THE ROCKFALL PROCESS IN THE SOUTHEAST REGION OF BRAZIL." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=32930@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>BOLSA NOTA 10<br>Este trabalho tem como finalidade comparar e analisar diferentes modelos numéricos na análise do processo de queda de blocos com diferentes geometrias, para que seja possível determinar os riscos à infraestrutura e à população local que este evento pode causar. Foram utilizados o software RAMMS e o programa de modelagem PFC3D para simulação de queda de blocos. O prim
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36

Evans, Christopher Lyle 1961. "The design of catch bench geometry in surface mines to control rockfall." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276961.

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This study proposes a rational process that can be used by the mining engineer to control rockfall by the design of catch bench geometry in surface mines. The problem of rockfall in surface mines is defined and factors causing rockfall are identified. Four civil engineering models that predict rockfall motion are presented and compared to rockfall field tests from eight different test sites. Based on these results, a computer program was written that combines aspects of the two best models. The Ritchie empirical model provides the most conservative result of catch bench width and berm height n
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37

Palmer, Cheryl F. "Rock glacier dynamics : with reference to the glacier ice core model of formation." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324831.

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38

Jancke, Oliver [Verfasser], and Michael [Akademischer Betreuer] Köhl. "Quantifying the mechanical resistance of coppice trees against rockfall / Oliver Jancke. Betreuer: Michael Köhl." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2013. http://d-nb.info/1030366004/34.

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39

PARANUNZIO, ROBERTA. "Statistical inference of the relations among air temperature, land-use change, and rockfall hazard." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2675019.

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Climate change has widespread impacts on human and natural systems worldwide. The pronounced air temperature warming detected worldwide could explain unusual events, as for example the increment of extreme precipitation events, increased incidence of summer heatwaves and slope instability. The possible presence of non-climatic forcings affecting temperature records, as for example land-use and land-cover changes, could introduce significant bias in the records and uncertainty on global overall temperature trends. This could somehow alterate, on the one hand, the perception of global warming, a
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40

Brehaut, Janet Catherine. "2D-Modelling of Earthquake-Induced Rockfall from Basaltic Ignimbrite Cliffs at Redcliffs, Christchurch, New Zealand." Thesis, University of Canterbury. Geological Sciences, 2012. http://hdl.handle.net/10092/9172.

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This thesis is concerned with modelling rockfall parameters associated with cliff collapse debris and the resultant “ramp” that formed following the high peak ground acceleration (PGA) events of 22 February 2011 and 13 June 2011. The Christchurch suburb of Redcliffs, located at the base of the Port Hills on the northern side of Banks Peninsula, New Zealand, is comprised of Miocene-age volcanics with valley-floor infilling marine sediments. The area is dominated by basaltic lava flows of the Mt Pleasant Formation, which is a suite of rocks forming part of the Lyttelton Volcanic Group that were
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41

Hales, Tristram Charles. "Role of lithospheric delamination and ice-driven rockfall erosion in the evolution of mountainous landscapes /." view abstract or download file of text, 2006. http://proquest.umi.com/pqdweb?did=1280144241&sid=2&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 115-137). Also available for download via the World Wide Web; free to University of Oregon users.
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42

BAJNI, GRETA. "STATISTICAL METHODS TO ASSESS ROCKFALL SUSCEPTIBILITY IN AN ALPINE ENVIRONMENT: A FOCUS ON CLIMATIC FORCING AND GEOMECHANICAL VARIABLES." Doctoral thesis, Università degli Studi di Milano, 2022. http://hdl.handle.net/2434/913511.

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The overarching goal of the doctoral thesis was thus the development of a systematic procedure capable to examine and enhance the role of geomechanical and climatic processes in rockfall susceptibility, performed with statistically based and Machine Learning techniques. To achieve this purpose, two case studies were analysed in the Italian Alps (Valchiavenna, Lombardy Region; Mountain Communities of Mont Cervin and Mont Emilius, Aosta Valley Region). For both case studies, Generalized Additive Models (GAM) were used for rockfall susceptibility assessment; for the Valchiavenna case study, a Ra
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43

Andreini, Lorenzo. "Analisi del rischio da caduta massi con Rockfall Hazard Rating System lungo la SP29 di Sovramonte (BL) e la SP19 di Lamon (BL)." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Scopo della tesi è l'analisi del rischio da caduta massi con Rockfall Hazard Rating System lungo la SP29 di Sovramonte (BL) e la SP19 di Lamon (BL). Sono stati utilizzati il metodo RHRS originale (Pierson et al., 1990) e il metodo RHRS modificato (P.Santi et al., 2009) per valutare gli aspetti geologici di dodici sezioni soggette a distacco di roccia insieme alle caratteristiche stradali. Con i punteggi ottenuti dallo studio di ogni sezione si è infine riusciti a fornire una scala di priorità per gli interventi di sistemazione.
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44

Mainieri, Robin. "La forêt, un intégrateur robuste de l'évolution de la dynamique des chutes de blocs dans un contexte de changements environnementaux ?" Electronic Thesis or Diss., Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALU009.

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Les chutes de pierres sont l'un des processus géomorphologiques les plus courants dans les milieux à forte pente. Malgré leur volume limité, les chutes de pierres constituent un danger important, en raison de leur évolution rapide, de leur vitesse élevée et de l'énergie d'impact. Leur caractère imprévisible peut être problématique lorsque l'on souhaite étudier en détail leur dynamique et leurs facteurs de déclenchement dans des conditions naturelles. L'influence relative des précipitations, de la fonte des neiges, de la température ou des cycles de gel-dégel est depuis longtemps reconnue, nota
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45

Brilli, Nicolò. "Valutazione del rischio da caduta massi con Rockfall Hazard Rating System lungo la strada comunale della Montagna (Sansepolcro,AR)." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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In questa tesi è stata valutata la pericolosità e quindi il relativo rischio da crollo. In particolare riferendoci ad ammassi affioranti lungo tratti stradali sono stati considerati due metodi classificativi, che ci hanno permesso di evidenziare sezioni a diverso rischio. Le metodologie utilizzate per la classificazione sono: - RHRS Pierson et al. 1990; - RHRS Russell et al. 2008. Ogni metodologia utilizza particolari tabelle che restituiscono punteggi la cui sommatoria cumulativa costituisce il Total Hazard Risk Score caratteristico di ogni sezione. Dopo aver discusso i risultati ottenu
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46

Royán, Cordero Manuel Jesús. "Caracterización y predicción de desprendimientos de rocas mediante LiDAR Terrestre = Rockfall characterization and prediction by means of Terrestrial LiDAR." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/334400.

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En esta tesis se ha llevado a cabo el monitoreo de diferentes escarpes rocosos, que ha permitido la caracterización y la predicción de los desprendimientos de rocas. Esta caracterización y predicción han sido realizadas a partir de la comparación de nubes de puntos LiDAR obtenidos mediante un instrumento del tipo terrestre (ILRIS- 3D, Optech). La principal ventaja del uso de este tipo de instrumentos es la posibilidad de adquirir datos relativamente precisos (+/- 1 cm) a una distancia considerable (+/- 400 m) sin tener que alterar el comportamiento natural de la pared rocosa y sin que exista n
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47

Misconel, Michele. "Analisi del rischio da caduta massi con Rockfall Hazard Rating System lungo la strada statale 612 (Molina di Fiemme, TN)." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12224/.

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Il presente lavoro ha lo scopo di analizzare con il metodo Rockfall Hazard Rating System (Pierson et al, 1990) un tratto di strada lungo la SS612 nei comuni di Molina di Fiemme (Tn) e Anterivo (Bz) in tre zone distinte e valutarne il rischio rispetto ai fenomeni di crollo.
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48

O'Shea, Thomas A. "Using an Inventory of Unstable Slopes to Prioritize Probabilistic Rockfall Modeling and Acid Base Accounting in Great Smoky Mountains National Park." Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3952.

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An inventory of unstable slopes along transportation corridors and performance modeling are important components of geotechnical asset management in Great Smoky Mountains National Park (GRSM). Hazards and risk were assessed for 285 unstable slopes along 151 miles of roadway. A multi-criteria model was created to select fourteen sites for two-dimensional probabilistic rockfall simulations and Acid Base Accounting (ABA) tests. Simulations indicate that rock material would likely enter the roadway at all fourteen sites. ABA test results indicate that influence of significant acid-producing potent
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49

Da, Silva Garcia Bruna. "Analyse des mécanismes d'interaction entre un bloc rocheux et un versant de propagation : application à l'ingénierie." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAI062/document.

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De nombreuses incertitudes liées aux mécanismes d'interaction entre les blocs rocheux et le versant naturel lors des chutes de blocs persistent ; la prévision de tels événements reste de ce fait encore incertaine. Néanmoins, les outils numériques et la puissance de calcul ne cessent d'évoluer. Si, auparavant, les calculs trajectographiques étaient restreints à des géométries simplifiées et à des mouvements balistiques en deux dimensions, il devient désormais possible d'y intégrer des raffinements tels que la forme complexe des blocs, des modèles numériques tridimensionnels de terrain d’une gra
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50

Farmer, Samantha. "Analysis and Risk Estimation of High Priority Unstable Rock Slopes in Great Smoky Mountains National Park, Tennessee and North Carolina." Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3953.

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Great Smoky Mountains National Park (GRSM) received 12.5 million visitors in 2020. With a high traffic volume, it is imperative roadways remain open and free from obstruction. Annual unanticipated rockfall events in GRSM often obstruct traffic flow. Using the Unstable Slope Management Program for Federal Land Management Agencies (USMP for FLMA) protocols, this study analyzes high priority unstable rock slopes through 1) creation of an unstable slope geodatabase and 2) generation of a final rockfall risk model using Co-Kriging from a preliminary risk model and susceptibility model. A secondary
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