Design and operation of an underwater pipeline trenching plough
An underwater trench 1·5 m deep was required for a pipeline shore crossing in the Canadian Arctic. At the site the sea bottom is soft mud, and the trench would be close to its limit of stability. It was decided to excavate the trench with a large plough, built to a new design which would avoid the d...
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Language: | English |
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Thomas Telford Ltd.
1979
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Online Access: | http://dx.doi.org/10.1680/geot.1979.29.3.305 https://www.icevirtuallibrary.com/doi/pdf/10.1680/geot.1979.29.3.305 |
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crtelford:10.1680/geot.1979.29.3.305 2023-10-09T21:48:59+02:00 Design and operation of an underwater pipeline trenching plough Palmer, A. C. Kenny, J. P. Perera, M. R. Reece, A. R. 1979 http://dx.doi.org/10.1680/geot.1979.29.3.305 https://www.icevirtuallibrary.com/doi/pdf/10.1680/geot.1979.29.3.305 en eng Thomas Telford Ltd. Géotechnique volume 29, issue 3, page 305-322 ISSN 0016-8505 1751-7656 Earth and Planetary Sciences (miscellaneous) Geotechnical Engineering and Engineering Geology journal-article 1979 crtelford https://doi.org/10.1680/geot.1979.29.3.305 2023-09-18T15:27:48Z An underwater trench 1·5 m deep was required for a pipeline shore crossing in the Canadian Arctic. At the site the sea bottom is soft mud, and the trench would be close to its limit of stability. It was decided to excavate the trench with a large plough, built to a new design which would avoid the difficulties that had been encountered with earlier trenching ploughs. The design uses the principle of the long-beam forestry plough, which gives accurate control of trench depth, and the mechanics of a plough of this type are described. Dimensional analysis was used to develop the similarity conditions that have to be obeyed in model tests of a plough in clay, and the results were used in an extensive programme of model testing, which checked the operation of the plough and was used to refine the design. The full-scale plough was then fabricated, tested in a river delta, and transported to the Arctic, where it successfully excavated the required trench. Une tranchée sousmarine, d'une profondeur de 1,50 m, était nécessaire pour la pose d'un pipeline dans I'Arctique canadien. Sur le site le fond marin est constitué d'argile tendre, telle que le profil de la tranchée serait voisin de la limite de stebilité du sol. II fut décidé d'exécuter la tranchée avec une charrue de grandes drmensions construite selon une nouvelle conception qui éviterait les difficultés rencontrées avec des charrues traditionnelles. Cette conception repose sur le principe de la “longue poutre” de la charrue forestére, qui permet un contrôle precis de la profondeur de la tranchée. Les principes mécaniques d'une telle charrue sont décrits dans cette présentation. La méthode de I'analyse dimensionnelle a été utilisée pour développer les conditions de similarité auxquelles des essais sur modéle dans l'argile devaient répondre. Les résultats ainsi obtenus furent utilisés durant le programme trés complet d'essai sur modéle, qui permit de vérifier les conditions d'opération de la charrue et d'améliorer des détails de conception. La charrue définitive fut ... Article in Journal/Newspaper Arctic ICE Virtual Library (ICE Publishing - via Crossref) Arctic Le Fond ENVELOPE(-55.815,-55.815,51.067,51.067) Géotechnique 29 3 305 322 |
institution |
Open Polar |
collection |
ICE Virtual Library (ICE Publishing - via Crossref) |
op_collection_id |
crtelford |
language |
English |
topic |
Earth and Planetary Sciences (miscellaneous) Geotechnical Engineering and Engineering Geology |
spellingShingle |
Earth and Planetary Sciences (miscellaneous) Geotechnical Engineering and Engineering Geology Palmer, A. C. Kenny, J. P. Perera, M. R. Reece, A. R. Design and operation of an underwater pipeline trenching plough |
topic_facet |
Earth and Planetary Sciences (miscellaneous) Geotechnical Engineering and Engineering Geology |
description |
An underwater trench 1·5 m deep was required for a pipeline shore crossing in the Canadian Arctic. At the site the sea bottom is soft mud, and the trench would be close to its limit of stability. It was decided to excavate the trench with a large plough, built to a new design which would avoid the difficulties that had been encountered with earlier trenching ploughs. The design uses the principle of the long-beam forestry plough, which gives accurate control of trench depth, and the mechanics of a plough of this type are described. Dimensional analysis was used to develop the similarity conditions that have to be obeyed in model tests of a plough in clay, and the results were used in an extensive programme of model testing, which checked the operation of the plough and was used to refine the design. The full-scale plough was then fabricated, tested in a river delta, and transported to the Arctic, where it successfully excavated the required trench. Une tranchée sousmarine, d'une profondeur de 1,50 m, était nécessaire pour la pose d'un pipeline dans I'Arctique canadien. Sur le site le fond marin est constitué d'argile tendre, telle que le profil de la tranchée serait voisin de la limite de stebilité du sol. II fut décidé d'exécuter la tranchée avec une charrue de grandes drmensions construite selon une nouvelle conception qui éviterait les difficultés rencontrées avec des charrues traditionnelles. Cette conception repose sur le principe de la “longue poutre” de la charrue forestére, qui permet un contrôle precis de la profondeur de la tranchée. Les principes mécaniques d'une telle charrue sont décrits dans cette présentation. La méthode de I'analyse dimensionnelle a été utilisée pour développer les conditions de similarité auxquelles des essais sur modéle dans l'argile devaient répondre. Les résultats ainsi obtenus furent utilisés durant le programme trés complet d'essai sur modéle, qui permit de vérifier les conditions d'opération de la charrue et d'améliorer des détails de conception. La charrue définitive fut ... |
format |
Article in Journal/Newspaper |
author |
Palmer, A. C. Kenny, J. P. Perera, M. R. Reece, A. R. |
author_facet |
Palmer, A. C. Kenny, J. P. Perera, M. R. Reece, A. R. |
author_sort |
Palmer, A. C. |
title |
Design and operation of an underwater pipeline trenching plough |
title_short |
Design and operation of an underwater pipeline trenching plough |
title_full |
Design and operation of an underwater pipeline trenching plough |
title_fullStr |
Design and operation of an underwater pipeline trenching plough |
title_full_unstemmed |
Design and operation of an underwater pipeline trenching plough |
title_sort |
design and operation of an underwater pipeline trenching plough |
publisher |
Thomas Telford Ltd. |
publishDate |
1979 |
url |
http://dx.doi.org/10.1680/geot.1979.29.3.305 https://www.icevirtuallibrary.com/doi/pdf/10.1680/geot.1979.29.3.305 |
long_lat |
ENVELOPE(-55.815,-55.815,51.067,51.067) |
geographic |
Arctic Le Fond |
geographic_facet |
Arctic Le Fond |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Géotechnique volume 29, issue 3, page 305-322 ISSN 0016-8505 1751-7656 |
op_doi |
https://doi.org/10.1680/geot.1979.29.3.305 |
container_title |
Géotechnique |
container_volume |
29 |
container_issue |
3 |
container_start_page |
305 |
op_container_end_page |
322 |
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1779312039407124480 |