In certain situations, frost heave, that settlement, landslides, mining subsidence, lowering, or flooding may cause movement that induces longitudinal stresses in a pipe which may be large enough to warrant intervention to relieve the stress. There…
Pipeline integrity may be affected by the action of the external soil loads that can be generated by ground movements or slope failures and the structural integrity threat of these geotechnical failures is not well understood. The threat presented to…
The vast majority of buried pipelines are not designed to accommodate significant localized ground movement such as that caused by landslides, earthquakes, or subsidence/settlement. When such a ground movement event occurs along the right-of-way…
The objective of this program was to install strain gage instrumentation on the PSF flow loop for use in future research and development programs. The strain gages were placed at critical locations on the flow loop to provide the opportunity for…
Land use policies increasingly prevent pipelines from obtaining right-of-way for pipeline corridors that avoid ground movement hazards. Where ground displacement hazards cannot be avoided, the potential risks must be managed by a suitable combination…
With the growing emphasis on extending the useful operation of existing pipelines and reducing the operating costs, the pipeline industry is sensitive to keeping pipelines in service and having a rational basis for doing so. When pipelines undergo…
Longwall mining can constitute a threat to the integrity of a pipeline by way of surface subsidence and soil strains. The subsidence and soil strain phenomena associated with longwall mining have been studied in detail both in the United Kingdom and…
High soil loads on buried pipelines can lead to unacceptably high pipeline strains developed in response to permanent ground displacement. Common causes of permanent ground displacement are related to slope instability as a result of heavy…
Differential movement of a buried pipeline resulting from terrain instabilities such as subsidence, fault slippage, frost heave, ice scouring, soil movement, and landslide can create localized areas of high stress in a pipeline. These areas may be…