Effects of Ground Movement on Oil and Gas Pipelines and Piles

地面运动对油气管道和桩的影响

• 批准号: RGPIN-2016-04168
• 负责人: Hawlader, Bipul
• 金额: $ 2.62万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636237
• 关键词: Effects; Ground; Movement; Oil; Gas

Landslides occur in both onshore and offshore environments. Similar to onshore landslides, many underwater seabed slope failures have been reported in the literature, and some of the large submarine landslides generated tsunami such as the Grand Banks landslide in offshore Newfoundland, Canada. Submarine landslides could also damage infrastructure installed in the seabed for offshore oil and gas development. Various factors could trigger onshore and offshore landslides; however, the existence of sensitive clay layers, toe erosion near the riverbank, upslope loading, formation of weakened zones and earthquake loading are the main foci of the present study. The large-scale landslides generally initiate through progressive development of failure planes along which a number of failed soil blocks displace over a large distance. Similarly, post-failure movement of the failed soil mass, known as ‘runout,’ could also have devastating effects on human life and infrastructure. Numerical modeling techniques, which can accommodate such large deformation of soil, will be developed in this research program to study onshore and offshore landslides and runout. In addition, pipelines or piles located in the landslide areas or runout zones might be damaged or destroyed due to the force transmitted to these structures by the sliding soil mass. Numerical analysis and physical modeling using a geotechnical centrifuge will be performed to understand pipeline–soil and pile–soil interaction mechanisms which could be used to improve design guidelines. Four Masters and five Doctoral candidates’ research will be supported by this grant at Memorial University of Newfoundland.

滑坡发生在陆上和近海环境中。与陆上滑坡类似，文献中已经报道了许多水下海床坡度故障，一些大型海底滑坡产生了海啸，例如加拿大纽芬兰离岸纽芬兰的大银行滑坡。海底滑坡还可能损坏海床中安装的基础设施，以进行海上石油和天然气开发。各种因素可能会触发陆上和海上滑坡；然而，敏感的粘土层的存在，河岸附近的脚趾侵蚀，上坡载荷，弱化区域的形成和地震载荷是本研究的主要重点。大规模滑坡通常是通过逐渐发展的故障平面开发而引发的，这些破坏平面沿着许多失败的土壤阻滞在较大距离内取代。同样，失败的土壤质量的失败后运动（称为“跳动”）也可能对人类的生活和基础设施产生毁灭性的影响。该研究计划将开发可容纳如此大的土壤变形的数值建模技术，以研究陆上和近海滑坡和跳动。此外，由于滑动土壤质量传递给这些结构的力，位于滑坡区域或跳动区域中的管道或钢琴可能会损坏或破坏。将进行使用岩土离心机的数值分析和物理建模，以了解可用于改善设计指南的管道 - 土壤和桩 - 土壤相互作用机制。纽芬兰纪念大学的这项赠款将支持四个硕士和五名博士学位研究。