Trench-backfill particle size effects on the performance of buried pipelines subject to ground movement

全球很大一部分的能源管道都埋在地下，它们延伸到很大一部分地区。 在地形和岩土条件变化很大的地形上，地质灾害 例如地面沉降、滑坡或地震引起的横向扩展，都可能是造成破坏的主要原因 到管道。对这些系统的性能的任何显著破坏通常转化为不期望的 对社会和环境的影响，以及公用事业公司的增长和价值创造。 减小地面移动时管道所受的土力是保证管道安全的关键之一 完整有限的初步研究工作，在先进的土壤管道相互作用研究（ASPIReTM）设施， 不列颠哥伦比亚省大学（UBC）建议， (e.g.,砾石大小）土壤颗粒提供了一种潜在的新方法， 埋地管道由于管道损坏风险降低所带来的直接/重大利益， 提高安全性，这一主题是管道部门的极大兴趣。目前对这种土壤力的理解 减少管道的方法非常有限。因此，迫切需要开展进一步研究， 这方面的知识。与行业合作者合作，全面的研究计划 在这个问题上提出了使用国家的最先进的设施在不列颠哥伦比亚大学。目标是 调查选择沟槽回填的价值，这将导致对埋地管道有利的土壤力 受到地面运动的影响。在这项工作中将培训高素质的人员，从而增加 加拿大管道岩土工程专业知识。研究成果将具有直接的高价值 适用于公司，以提高管道的完整性和安全性。该项目还将建立一个 与申请人和行业合作者建立牢固的新工作关系。对此的调查 科学上有趣的挑战将导致出版物和潜在的工程设计指南， 转，为整个管道部门做出贡献。

A very large proportion of the global energy pipelines are buried below ground, and they extend over large distances across terrain that has highly variable topography and geotechnical conditions. Geotechnical hazards such as ground subsidence, landslides, or earthquake-induced lateral spreading can be a major cause of damage to pipelines. Any significant disruption to the performance of these systems often translates into undesirable impacts on the society and environment, as well as the growth and value creation of the utility companies. Reduction of soil forces on pipelines during ground movements is one of the keys to securing pipeline integrity. Limited initial research work at the Advanced Soil Pipe Interaction Research (ASPIReTM) facility at the University of British Columbia (UBC) suggests that filling of pipeline trenches with relatively large size (e.g., gravel size) soil particles provides a potentially novel way of improving forces from soil movements on buried pipelines. Due to the direct/significant benefits arising from the reduced risk of pipeline damage and enhanced safety, this topic is of great interest to the pipeline sector. The current understanding of this soil force reduction approach for pipelines is very limited. As such, there is a strong need to undertake further research to advance knowledge on this front. Working with an industry collaborator, a comprehensive research program on this subject is proposed using the state-of-the-art facilities at the University of BC. The objective is to investigate the value of selecting trench backfills that would result in favorable soil forces on buried pipes subjected to ground movements. Highly qualified personnel will be trained during this work, thus adding to the pipeline geotechnical engineering expertise in Canada. The research findings will be of direct high-value applicability to the Company for the enhancement of pipeline integrity and safety. The project will also build a strong new working relationship with the applicant and an industry collaborator. The investigation on this scientifically interesting challenge would lead to publications and potential engineering design guidelines, in turn, contributing to the pipeline sector at large.