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，为我们的生活提供水和能源。然而， 泄漏和故障等管道事故可能会产生重大的经济和环境后果。 能源管道泄漏会污染环境并引起火灾。地面 移动已被确定为管道事故的原因之一。埋在移动地面的管道 承受的负载会对墙壁产生过大的应力和应变，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，因为 地面移动荷载，特别是用于天然气输送和分配的小直径管道 系统。当前研究的目标是开发气体应力/应变评估方法 承受地面移动荷载的分配管道和管道完整性评估框架 识别高风险区域。土管相互作用的全尺寸实验室测试和有限元 (FE) 建模 将开发用于评估天然气分配网络中管道的简化工具。一个 执业工程师需要简化的设计工具来评估运行条件 使用中的管道，详细的有限元建模被认为成本高昂且不方便。测试将进行 使用新颖的实验室测试方法来模拟地面，通过实验检查管道的行为 现场预期的移动场景。将使用 Abaqus FE 开发有限元建模技术 软件来模拟测试中观察到的响应。建议应用监督机器学习 回归方法使用实验室测试和有限元建模的数据来开发简化方法 管道应变评估。这项研究的结果将增进对管道的了解 经历地面运动，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有效、安全地提供天然气供应 因此，保护​​加拿大环境免受天然气泄漏。