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MSE WALLS (GEOSTRIP)

  • A mechanically stabilized earth (MSE) wall is a composite earth structure capable of sustaining significant loads and deformation due to the interaction between the backfill material and the stabilizing elements.
  • The behavior of a stabilized soil mass depends on a number of factors, including the soil, the reinforcement and the soil/structure.
  • Designing of these walls considers important parameters like the soil friction, the cohesion, the interface shear stiffness and the strip elastic modulus.
  • The maximum height of the MSE wall unlike Modular  block retaining walls can be over 40 m.

Applications.

  •  Bridge abutments and wing walls,
  • Embankments
  • For slope stability where foundation soils are poor.

These earth structures are stabilized using Geosynthetic elements such as Geostrips

GEOSTRIPS

  • Geostrips are geosynthetic strips engineered for the stabilization of soils or mechanically stabilized earth structures.
  • Comprises a core of tensioned high tenacity polyester  filament yarn tendons encased in a sheath of linear low density polyethylene.

FUNCTION OF GEO STRIP IN MSE WALLS

  • The strip is ribbed along its edges which provides high friction with the soil.
  • Once the friction is fully mobilized over the entire strip, it behaves as a stiff reinforcement.
  • That higher friction capacity and lower deformation during compaction provided by geostrips improves the strip performance in terms of structural stabilization and constructability compared to others geosynthetic reinforcements.
  • It also provides mechanical protection by providing a smooth surface of contact between the concrete  panel and the strips and at the same time chemical protection for the concrete.