Kar, Shantanu (2016) Submarine slope failures in gassy soils. Masters thesis, Memorial University of Newfoundland.
- Accepted Version
Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
Submarine slope stability has become an important concern and a subject of research with increasing demand for offshore developments and technological advancement for harsh and challenging environments. The consequences of submarine slope failure adjacent to oil and gas facilities would have a large financial, safety and regulatory impact. This current research work investigates potential failure of submarine gassy slopes triggered by tidal variations. Due to tidal variations, failure of an unsaturated slope may occur under specific combinations of increasing degree of saturation and soil permeability, and decreasing tidal period. Novel physical model tests in a geotechnical centrifuge were undertaken to examine submarine slope failure mechanisms containing gassy sediments. The model preparation techniques, measurement systems and results are presented. The response observed in the model test is discussed and further developments proposed. The buried PPT’s response of the submarine slope are comparable in terms of attenuation and phase lag with Nagaswaran (1983) and with field measurements of Atigh and Byrne (2004) in terms of phase lag.
|Item Type:||Thesis (Masters)|
|Additional Information:||Includes bibliographical references (pages 121-130).|
|Keywords:||Submarine slope failure, Gassy soils, Tidal variation, Physical modelling of submarine gassy slope failures, SUBMARINE SLOPE FAILURES IN GASSY SOILS|
|Department(s):||Engineering and Applied Science, Faculty of|
|Library of Congress Subject Heading:||Slopes (Soil mechanics)--Stability; Submarine topography; Offshore structures; Soils--Testing; Centrifuges|
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