Embankments over Soft Clay Deposits: Contribution of Basal Reinforcement and Surface Sand Layer to Stability

Embankments over Soft Clay Deposits: Contribution of Basal Reinforcement and Surface Sand Layer to Stability

This paper evaluates the significance of basal reinforcement and the presence of the surface sand layer in the stability. This evaluation is carried out by means of field measurements and stability analyses of three test embankments on soft clay taken to failure. Two of the test embankments were rei...

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Bibliographic Details
Published in:Journal of geotechnical and geoenvironmental engineering Vol. 136; no. 1; pp. 260 - 264
Main Authors: Oliveira, Henrique Magnani, Ehrlich, Mauricio, Almeida, Marcio S. S
Format: Journal Article
Language:English
Published: Reston, VA American Society of Civil Engineers 01-01-2010
Subjects:
Applied sciences
Buildings. Public works
Exact sciences and technology
Geotechnics
Soil investigations. Testing
Stabilization. Consolidation
TECHNICAL NOTES
Surface sand layer
Clay
Sand
Stability
Instruments
Soft clay
Surface layer
Drain
Experimental study
Soft soil
Stability analyses
Geometry
Embankments
Clays
Safety factor
Soft soils
Soil test
Reinforcement
Test embankments
Monitoring
Soil type
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Summary:This paper evaluates the significance of basal reinforcement and the presence of the surface sand layer in the stability. This evaluation is carried out by means of field measurements and stability analyses of three test embankments on soft clay taken to failure. Two of the test embankments were reinforced and one was unreinforced. Stability analyses were carried out taking into account measured values of reinforcement tension forces during construction. The set of analyses have shown that the top sand layer was more important to the stability of the embankments than the basal reinforcement. The cases studied have also shown that the conventional design practice that assumes for the reinforcement a fixed tension contribution may lead to unrealistic higher factor of safety.
ISSN:1090-0241
1943-5606
DOI:10.1061/(ASCE)GT.1943-5606.0000200