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Assessment of Reinforced Embankment Stability over Soft Soils Based on Monitoring Results

Additional Info

  • Practice Areas: Contaminated Sites; Environmental Management
  • Event or Publication: Publication
  • Title: Geosynthetics International
  • All Authors: Chunling Li and David Espinoza
  • Geosyntec Authors: Chunling Li and David Espinoza
  • Citation: Geosynthetics International ISSN 1072-6349 | E-ISSN 1751-7613
  • Date: 2017
  • Type: Publication (Journal)

The stability of a reinforced embankment relies on the contribution of the soil shear strength as well as the reinforcement tensile strength.

Typical geotechnical monitoring programs implemented during construction focus on the deformation of foundation soils without quantifying the contribution of the reinforcement. Therefore, the collected information does not provide a direct indication of the stability of the reinforced embankment. This paper presents a semi-empirical method to assess the stability during construction of a reinforced embankment constructed over soft ground. A finite-element model was used to analyze the stability of a 20 m high, 2.4 km long reinforced embankment being constructed over soft dredge/alluvium. The finite-element model was used to evaluate the process of how the reinforcement tensile strength and foundation shear strength are mobilized during the course of construction and to study the potential correlations between the degree of mobilization for soil shear strength and monitoring results. The analyses show that the ratio of maximum lateral displacement (δ) to embankment settlement (S) can be used to assess the degree of shear strength mobilized in the foundation soils.

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