Submarine debris impact on randomly positioned pipeline on seafloor
Submarine debris impact on randomly positioned pipeline on seafloor
One of the major natural threats in offshore geotechnics is the occurrence of debris flow on slopes and the impact of the sliding mass on structures installed on the seabed. Pipelines that transport crude oil are among the most vulnerable structures, whose failure can lead to significant environmental risks. Herein, several geotechnical centrifuge tests were conducted to study the impact mechanism on this structure in particular, varying the pipeline embedment ratio and its orientation in relation to debris flow direction. Reynold´s and Froude Numbers were used to allow interpretation of the impact force related to these dimensionless quantities. To that end, the pipe was strategically instrumented with strain gauges, with pairs of pore and total pressure transducers installed in the path of the debris flow. This latter set of instrumentation aimed at characterizing the composition and morphology of the landslide, which are directly related to impact force, described in terms of the drag coefficient. Additionally, images captured by a high-speed camera were used to confirm the morphology of the debris flow head and flow velocity
Cassia Melo; Fernando Saboya; Sergio Tibana; Rodrigo Reis; Ricardo Garske Borges
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
15 - Mooring lines, Cables, Pipelines, Immersed tunnels and Risers
https://doi.org/10.53243/ISFOG2025-222
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