Debris Flow Impact Mitigation Using Dual Flexible Barriers: Experimental and Numerical Study
DOI:
https://doi.org/10.64862/ajeg.2025.2sp.98.236Keywords:
Debris flows, Flexible barriers, Impact, Flume experimentAbstract
Debris flows pose severe threats to infrastructure and lives globally. Multiple flexible barriers offer a sustainable alternative to single rigid structures by progressively retaining and decelerating debris flows. This study investigates dynamic interactions between debris flows and dual flexible barriers through physical flume tests and numerical back-analysis. A 9.0 m³ debris flow impacts two flexible barriers in a 28-m flume, revealing mechanisms like frontal impact, runup rollback, overflow, and landing. The numerical model captures key kinematics and stress evolution. Results show the first barrier significantly reduces peak impact pressure on the second barrier, enhancing design efficacy for multi-barrier systems.
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