Simulation of Full-Scale Rockfall Tests with a Fragmentation Model

Geosciences

Jordi Corominas¹  Josep Gili¹  Roger Ruiz-Carulla¹  Gerard Matas¹  Nieves Lantada¹  Albert Prades² 

[1]Division of Geotechnical Engineering and Geosciences, Universitat Politècnica de Catalunya. C. Jordi Girona 1-3, 08034 Barcelona, Spain

[2]Division of Geotechnical Engineering and Geosciences, Universitat Politècnica de Catalunya. Dr. Marañón 44-50, 08028 Barcelona, Spain

关键词: rockfall simulator;    fragmentation;    fractal mode;    calibration;    quarry;   

DOI  :  10.3390/geosciences10050168

来源: DOAJ

【 摘 要 】

In this paper, we present the upgraded version of RockGIS, a stochastic program for the numerical simulation of rockfalls and their fragmentation, based on a fractal model. The code has been improved to account for a range of fragmentation scenarios, depending on the impact conditions. In the simulation, the parameters of the fractal fragmentation model that define the sizes of the generated fragments were computed at each impact according to the kinematic conditions. The performance of the upgraded code was verified and validated by real-scale rockfall tests performed in a quarry. The tests consisted of the release of 21 limestone blocks. For each release, the size and spatial distribution of the fragments generated by the impacts were measured by hand and from orthophotos taken via drone flights. The trajectories of the blocks and the resulting fragments were simulated with the code and calibrated with both the volume distribution and the runout distances of the fragments. Finally, as all the relevant rockfall parameters involved were affected by strong uncertainty and spatial variability, a parametric analysis was carried out and is discussed.

【 授权许可】

Unknown