Centrifuge modelling of active slide–pipeline loading in soft clay
Submarine slides are a significant hazard to the safe operation of pipelines in the proximity of continental slopes. This paper describes the results of a centrifuge testing programme aimed at studying the impact forces exerted by a submarine slide on an offshore pipeline. This was achieved by dr...
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| Main Authors: | , , , |
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| Format: | E-Article |
| Language: | English |
| Published: |
Plum Analytics
2014
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/16157/1/Centrifuge%20modelling%20of%20active%20slide%E2%80%93pipeline%20%28abstract%29.pdf http://ir.unimas.my/id/eprint/16157/ https://www.researchgate.net/publication/274764994 |
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| Summary: | Submarine slides are a significant hazard to the safe operation of pipelines in the proximity of
continental slopes. This paper describes the results of a centrifuge testing programme aimed at
studying the impact forces exerted by a submarine slide on an offshore pipeline. This was achieved by
dragging a model pipe at varying velocities through fine-grained soil at various degrees of consolidation,
hence exhibiting properties spanning from the fluid to the geotechnical domains, relevant to the
state of submarine slide material. To simulate the high strain rates experienced by the soil while
flowing around a pipe in the path of a submarine slide, tests were conducted at pipe–soil velocities of
up to 4.2 m/s. The changing density and shear strength of the samples were back-calculated from
T-bar penetrometer test results. A hybrid approach combining geotechnical and fluid-mechanics-based
components of horizontal drag resistance was developed. This approach provides an improved method
to link the density and strength of the slide material to the force applied on the pipe. Besides fitting
the present observations, the method provides an improved reinterpretation of similar data from the
literature. |
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