The Pipeline Research Council International (PRCI), a 60-year-old not-for-profit industry group, is currently reviewing a Final Report on “Assessment of Geosynthetic Fabrics to Reduce Soil Loads on Buried Pipelines.” According to the the PRCI’s latest update on the collaborative research, “This research determined that the use of two layers of geotextile fabric on a sloped trench boundary is effective in reducing maximum horizontal soil loads at small displacements with observed reductions of approximately 30% and 40% in the horizontal soil restraint provided by gravel for various trench wall angles.” The project has aimed to find a methodology and approach that would be repeatable, in the lab and in the field.

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