
High-pressure gas pipelines constitute critical lifelines that often cross potentially unstable slopes under static and/or seismic conditions. Consequently, their structural integrity may be detrimentally affected by permanent ground displacements due to landslides, leading to local-buckling phenomena and failures. Given that pipeline rerouting is often unfeasible due to various techno-economic reasons, several mitigation measures have gradually been developed to minimize the impact of landslides on the structural integrity and safe operation of pipelines. Nonetheless, these mitigation measures are not always applicable for practical or economic reasons. The overgrowing demands for safe and uninterrupted energy supply, either onshore and/or offshore, necessitate innovative, practical and cost-efficient design solutions. In response to this need, the current study introduces a novel pipeline configuration, namely the "S-shaped pipeline". This scheme refers to a pipeline with one or more sigmoid curvatures at specific points of a potentially unstable slope, either onshore or nearshore (i.e., landfall areas). The optimal position of the prefabricated curved parts along the landslide zone has been examined via finite-element simulations. The corresponding results demonstrate the effectiveness of the proposed approach in avoiding local buckling phenomena in landslide-prone areas.
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