Proactive Slope Stabilization using Recycled Plastic Pin- A Case Study-PPT Presentation

PPT Presentation

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The presentation describes recycled plastic pins (RPPs) as a sustainable method for stabilizing slopes. Made from commercially available recycled polymer, the pins help reduce plastic waste and are biologically resistant. Laboratory three-point bending tests measured their flexural strength and stiffness, with results varying across specimen batches.<br /><br />RPPs reinforce slopes by increasing resistance to movement. Unlike conventional reconstruction—which can require lane closures, excavation, removal of failed soil, imported fill, and repeated compaction—RPP installation can avoid excavation and imported material, keep traffic open, and be completed in days.<br /><br />A project first repaired with RPPs in 2010 remained in good condition in 2024. In contrast, the adjacent control slope failed and was rebuilt twice, illustrating the potential for durable stabilization. The presentation also covers a later case study involving a failed slope and proactive repairs to multiple slopes. Investigations included electrical resistivity imaging and LiDAR, and finite-element modeling in PLAXIS. The reported factor of safety increased from 1.02 without RPPs to 1.45 with them.<br /><br />Overall, the case studies present RPPs as a potentially efficient, lower-impact alternative for both repairing failed slopes and proactively stabilizing vulnerable ones.

Keywords

recycled plastic pins

slope stabilization

recycled polymer

flexural strength

three-point bending

road slope repair

electrical resistivity imaging

LiDAR

PLAXIS modeling

factor of safety