Flexible Debris Flow Barriers in Fire Burned Areas

Rorem, Erik; Wendeler, Corinna; Roth, Andrea

doi:10.1007/978-3-642-31337-0_29

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Flexible protection systems have been widely employed in transportation, land, mineral, and energy sectors, among others, to prevent and control geological disasters on slopes. The flexible barrier, one of the structural variations of the flexible protection system (Volkwein et al, 2011;Gentilini et al, 2012;Shi et al, 2013;Luo et al, 2022), is particularly well known for its effectiveness as a defence against highenergy impact hazards such as rockfalls, debris flows, mudslides, and avalanches (Peila and Ronco, 2009;Rorem et al, 2013;Kwan et al, 2014). The flexible barrier is a structural system made up of the supporting part, the intercepting part, the connecting part, the energy dissipation part, and the anchoring part.…”

Section: Introductionmentioning

confidence: 99%

Optimization strategy for flexible barrier structures: investigation and back analysis of a rockfall disaster case in southwestern China

Luo,

Yu,

Zhang

et al. 2024

Nat. Hazards Earth Syst. Sci.

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Abstract. Field investigations and back analyses were conducted on a rockfall hazard. The flexible barrier protection system constructed along the roadside was damaged by the rockfall impact and lost its mitigation ability. Vital physical characteristics such as rockfall trajectory and kinetic energy were presumed based on the data from the aerial survey and the slope digital model. A numerical model, including slope, rockfalls, and flexible barrier, was created and thus the impacting process was reproduced. It demonstrates that the impact kinetic energy of the rockfall is only around 40 % of its design protection energy. The improper connections of members are the leading causes of damage, which prevent the flexible barrier from producing significant deformation and reduce its capacity to absorb impact force. The damage can be avoided by changing the connections of the members to improve the ability of the nets and ropes to slide and deform. The calculation results indicate that the impact resistance of the optimized model is 3 times better than the actual project. The findings can be used as a guide when designing a flexible protection system that performs better.

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Section: Introductionmentioning

confidence: 99%

Optimization strategy for flexible barrier structures: investigation and back analysis of a rockfall disaster case in southwestern China

Luo,

Yu,

Zhang

et al. 2024

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…As far as the modeling aspects of the design of flexible barriers are concerned, two different possible approaches are available: the energy approach and the force approach. The energy approach (Wartmann and Salzmann, 2002;Rorem et al, 2013;Wendeler et al, 2010) depends on the duration of the impact and the held back mass and the energy of the flow are therefore drastically overestimated for gradual or intermittent filling events. The impact energy is generally used to choose the class of barrier that has to be installed.…”

Section: Introductionmentioning

confidence: 99%