Hybrid Design Approach for Anchored Wire Mesh: Towards a Displacement Based Design-PPT Presentation

PPT Presentation

Pdf Summary

The presentation introduces a hybrid design method for stabilizing the surface of soil slopes with steel wire mesh and anchors. The mesh spans between anchors, containing and supporting soil as it moves; anchors may be passive soil nails or active tiebacks and bolts. Unlike rigid facings, flexible mesh must deform to mobilize its tensile strength, so its stiffness and load–strain behavior are central to performance.<br /><br />Conventional limit-equilibrium methods generally assess forces before deformation and may treat mesh resistance too simply. They can therefore overlook whether the displacement needed to mobilize mesh capacity exceeds an acceptable level. Detailed numerical analyses can address this interaction but may require substantial resources.<br /><br />The hybrid approach combines limit-equilibrium analysis of the soil mass with serviceability-based consideration of displacement and soil–structure interaction. Its key element is a characteristic curve describing how a particular mesh–soil–anchor system responds to displacement, including mesh tension, pressure, and forces induced in the anchors. This allows designers to account for relative soil–mesh stiffness and the displacement pattern when estimating stabilizing action.<br /><br />In application, the required pressure to stabilize a potential failure mechanism is determined, and the resulting forces in the mesh and anchors are checked against their respective capacities. The method also helps assess whether component working ratios remain within allowable limits.<br /><br />The authors argue that this approach provides a more realistic, practical means of evaluating flexible facing systems than force-only methods, while making deformation and mesh stiffness explicit in the design.

Keywords

soil slope stabilization

steel wire mesh

anchors

flexible facing

hybrid design method

limit-equilibrium analysis

serviceability displacement

soil-structure interaction

mesh tensile strength

characteristic curve