A method for rockfall risk quantification and optimal arrangement of protection structures along a road
•Optimal arrangement of rockfall protection structures combined with risk analysis.•Risk quantification considering several rock block sizes and their frequencies.•Hazard and exposure analysis based on three-dimensional trajectory simulation.•Determination of positions and types of countermeasures t...
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| Vydané v: | Engineering geology Ročník 314; s. 107004 |
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| Hlavní autori: | , , , , , |
| Médium: | Journal Article |
| Jazyk: | English |
| Vydavateľské údaje: |
Elsevier B.V
05.03.2023
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| Predmet: | |
| ISSN: | 0013-7952, 1872-6917 |
| On-line prístup: | Získať plný text |
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| Shrnutí: | •Optimal arrangement of rockfall protection structures combined with risk analysis.•Risk quantification considering several rock block sizes and their frequencies.•Hazard and exposure analysis based on three-dimensional trajectory simulation.•Determination of positions and types of countermeasures that minimize road risk.•Optimization subject to budget constraints and changes in traffic volume.
The purpose of this study is to introduce a novel framework that aids in the installation of rockfall protection structures for the risk reduction of rockfall-related damage. In this study, we propose a computational method that performs risk analysis for a road and plans an optimal arrangement of rockfall protection structures. First, a rockfall trajectory simulation is performed using a three-dimensional numerical analysis method to obtain sufficient data for risk analysis. Then, the risk to motorized traffic during a certain period is quantified considering the relationship between rock block volume and rockfall frequency, the movement of rock blocks, the vulnerability of elements at risk, and some other factors. Finally, a knapsack problem that aims to minimize the total risk on a road while satisfying a budget constraint is solved. The proposed method is applied to an actual site and represents that it can derive a layout for protection structures to maximize the cost-benefit performance depending on the road traffic and budget conditions. The obtained results of the structural protection plan can be used to support road managers in decision making. |
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| ISSN: | 0013-7952 1872-6917 |
| DOI: | 10.1016/j.enggeo.2023.107004 |