Rockfalls are frequent instability processes in road cuts, open pit mines and quarries, steep slopes and cliffs. Even though the stability of rock slopes can be determined using analytical approaches, the assessment of large rock cliffs require simplifying assumptions due to the difficulty of working with a large amount of joints, the scattering of both the orientations and strength parameters. The attitude and persistency of joints within the rock mass define the size of kinematically unstable rock volumes and determine the way how the fragmentation of the detached mass occurs due its impact with the ground surface. Knowledge of the size and trajectory of the blocks resulting from fragmentation is critical in determining the vulnerability of buildings and protection structures. The first goal of the project is to obtain the distribution of potentially unstable volumes and its probability of failure, by means of the characterization of the fracture pattern of the rocky cliffs. Also the analysis of the fragmentation process of rock falls, which is critical for simulating trajectories and evaluating the intensity of impacts. The ultimate goal of the project is to quantify risk due to rockfalls and develop tools for the improvement of prevention and for protection from its occurrence. The project is divided into three work packages that continue and generalize several of the developments made by the research team: (a) The spatially explicit determination of rock mass volumes kinematically unstable using high resolution remote techniques (Terrestrial Laser Scanner and digital photogrammetry obtained with Unmanned Aerial Vehicles ) whose use is justified by the inaccessibility of the rocky cliff and the risk involved; (b) Analysis of the fragmentation laws using data collected from recent rockfall events that will be checked against in the distributions of primary rock volumes in the rock wall. Incorporation of the fragmentation mechanism in rockfall propagation models and in the calculation of impact energies; (c) Quantitative risk assessment of rockfalls and its prevention. Development of methods for quantitative assessment of the vulnerability of different types of structures and buildings (masonry, reinforced concrete) against rockfalls. Preparation of fragility curves for different types of structures. Suggestions for the improvements in structural reinforcement and for the design of protection elements.
Matas, G.; Lantada, N.; Corominas, J.; Gili, J.; Ruiz-Carulla, R.; Prades, A. European Geosciences Union General Assembly p. 1 DOI: 10.5194/egusphere-egu2020-19352 Presentation's date: 2020-05-07 Presentation of work at congresses
Carreño, M.L.; Lantada, N.; Jaramillo, N. Revista internacional de métodos numéricos para cálculo y diseño en ingeniería Vol. 34, num. 1, p. 1-13 DOI: 10.23967/j.rimni.2017.7.001 Date of publication: 2018-01 Journal article
Ruiz-Carulla, R.; Matas, G.; Prades, A.; Gili, J.; Corominas, J.; Lantada, N.; Buill, F.; Mavrouli, O.; Núñez-Andrés, M.A.; Moya, J. International Symposium Rock Slope Stability p. 107-108 Presentation's date: 2016-11-16 Presentation of work at congresses