Investigation of gas distribution pipes subjected to ground movements

研究受地面运动影响的燃气分配管道

• 批准号: 560315-2020
• 负责人: Dhar, Ashutosh
• 金额: $ 6.67万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=706861
• 关键词: Investigation; gas; distribution; pipes; subjected

Pipelines are lifelines of modern society, which are used to supply water and energy for our living. However, pipeline incidents, such as leaks and failure, can have significant economic and environmental consequences. Leaking from energy pipelines can contaminate the environment and cause a fire hazard. The ground movement has been identified as one of the causes of pipeline incidents. Pipes buried in the moving ground experience loads that induce excessive stresses and strains on the wall, causing leaks and/or failures. However, no acceptable design method is currently available for the assessment of pipe wall stresses and strains due to the ground movement loads, particularly for small diameter pipes used in gas transmission and distribution systems. The objectives of the current study are to develop methods for stress/strain assessment of gas distribution pipes subjected to the ground movement loads and a pipeline integrity assessment framework to identify high-risk areas. Full-scale laboratory testing and finite element (FE) modelling of soil-pipe interaction will be performed to develop simplified tools for the assessment of the pipes in the gas distribution network. A simplified design tool is required for practicing engineer for the assessment of the operational conditions of pipes in service, where detailed FE modelling is considered costly and inconvenient. Tests will be conducted to experimentally examine the behavior of the pipes using a novel laboratory test method to simulate ground movement scenarios expected in the field. FE modelling techniques will be developed using Abaqus FE software to simulate the observed responses from the tests. It is proposed to apply supervised machine learning regression methods using the data from the laboratory tests and FE modelling to develop the simplified method of pipe strain assessment. The findings from this research will advance the knowledge on pipelines experiencing ground movements and would be useful for mitigating the risks of pipeline failures. Thus, the research findings will contribute to providing natural gas supply to the Canadians effectively and safely and thus, to the protection of the Canadian environment from gas leakage.

管道是现代社会的生命线，用于为我们的生活提供水和能源。然而， 管道事件（例如泄漏和故障）可能会带来重大的经济和环境后果。 从能源管道中泄漏会污染环境并引起火灾危险。地面 运动已被确定为管道事件的原因之一。埋在移动地面的管道 经验负载会引起墙壁上过度压力和应变，从而导致泄漏和/或故障。然而， 目前没有可接受的设计方法可用于评估管壁应力和应变 地面运动负载，特别是用于气体传输和分布中的小直径管 系统。当前研究的目标是开发用于压力/应变气体的方法 应对地面移动载荷和管道完整性评估框架进行的分配管道 识别高风险区域。全尺度实验室测试和有限元（Fe）土壤互动建模 将执行以开发简化的工具，以评估气体分配网络中的管道。一个 为了评估操作条件，需要简化的设计工具 服务中的管道，其中详细的FE建模被认为是昂贵且不便。测试将进行 使用新型实验室测试方法模拟地面的实验检查管道的行为 运动场景预计在该领域。 Fe建模技术将使用Abaqus Fe开发 模拟测试中观察到的响应的软件。建议应用监督的机器学习 使用实验室测试和FE建模的数据进行回归方法来开发简化的方法 管道应变评估。这项研究的发现将提高管道知识 经历地面运动，将有助于减轻管道故障的风险。因此， 研究结果将有助于为加拿大人提供天然气供应有效，安全，以及 因此，保护​​加拿大环境免受气体泄漏。