A model for predicting pipeline sinkage induced by tunnel scour
A model for predicting pipeline sinkage induced by tunnel scour
The current design practice for subsea pipeline on-bottom stability (e.g. DNV-RP-F109) does not account the effect of sediment transport around a pipeline. Both field survey and small scale model test results show that seabed scour has a significant effect on pipeline embedment and therefore stability. Physical model tests carried out in an innovative large experimental facility, named the O-tube, at the University of Western Australia, have shown that tunnel scour and the subsequent pipe sinkage into the scour hole tend to stabilize a pipeline which might otherwise become unstable on an assumed stationary seabed, under ramping-up flow conditions. A simple calculation model that incorporates the three-dimensional scour and pipe sinkage due to the soil bearing capacity failure at the supporting span shoulders is proposed. The model parameters were calibrated using the O-tube experimental results. The model serves as a key element of a new pipeline stability analysis method that takes into account seabed mobility.
On-bottom stability, Pipe sinkage, Pipeline, Tunnel scour
46-52
Luo, Chengcai
3f76a01f-41ea-43b3-8be7-6e6289179aa8
An, Hongwei
53542f2c-e294-4e26-a581-344e646c72e6
Cheng, Liang
0ce99dcc-f682-4ec6-97aa-59fd87174385
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
1 December 2014
Luo, Chengcai
3f76a01f-41ea-43b3-8be7-6e6289179aa8
An, Hongwei
53542f2c-e294-4e26-a581-344e646c72e6
Cheng, Liang
0ce99dcc-f682-4ec6-97aa-59fd87174385
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Luo, Chengcai, An, Hongwei, Cheng, Liang and White, David
(2014)
A model for predicting pipeline sinkage induced by tunnel scour.
Geotechnical Engineering, 45 (4), .
Abstract
The current design practice for subsea pipeline on-bottom stability (e.g. DNV-RP-F109) does not account the effect of sediment transport around a pipeline. Both field survey and small scale model test results show that seabed scour has a significant effect on pipeline embedment and therefore stability. Physical model tests carried out in an innovative large experimental facility, named the O-tube, at the University of Western Australia, have shown that tunnel scour and the subsequent pipe sinkage into the scour hole tend to stabilize a pipeline which might otherwise become unstable on an assumed stationary seabed, under ramping-up flow conditions. A simple calculation model that incorporates the three-dimensional scour and pipe sinkage due to the soil bearing capacity failure at the supporting span shoulders is proposed. The model parameters were calibrated using the O-tube experimental results. The model serves as a key element of a new pipeline stability analysis method that takes into account seabed mobility.
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More information
Published date: 1 December 2014
Keywords:
On-bottom stability, Pipe sinkage, Pipeline, Tunnel scour
Identifiers
Local EPrints ID: 419754
URI: http://eprints.soton.ac.uk/id/eprint/419754
ISSN: 0046-5828
PURE UUID: 45313d8e-1c9f-4bba-86ae-ad7c8ba44f93
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Date deposited: 20 Apr 2018 16:30
Last modified: 09 Jan 2022 03:59
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Contributors
Author:
Chengcai Luo
Author:
Hongwei An
Author:
Liang Cheng
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