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Construction and post-construction behaviour of a geogrid-reinforced steep slope

Title
Construction and post-construction behaviour of a geogrid-reinforced steep slope
Type
Article in International Scientific Journal
Year
2003
Authors
Agostinho Mendonça
(Author)
Other
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Maria de Lurdes Lopes
(Author)
FEUP
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Margarida Pinho Lopes
(Author)
Other
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Journal
Vol. 21 No. 2
Pages: 129-147
ISSN: 0960-3182
Indexing
COMPENDEX
Scientific classification
FOS: Engineering and technology > Other engineering and technologies
CORDIS: Technological sciences
Other information
Authenticus ID: P-007-ASV
Resumo (PT):
Abstract (EN): A geogrid reinforced steep slope was built and monitored during construction and during the first ten months of service. The slope is located between Régua and Reconcos in the new Portuguese main itinerary, IP3, and is a part of reestablishment 2. The reinforced slope has an extension of about 206.2m, is in curve and the reinforced area reaches a maximum height of about 19.6m in the outside curve slope at 150.0m of extension (km 0 + 150). The monitored slope cross section is at km 0 + 150. The reinforcements are high density polyethylene geogrids;. materials with different tensile strength values were used. The reinforcement strains were measured at three reinforcement levels using linear extensometers. The soil vertical stresses were recorded using load cells. The internal horizontal displacements of the slope were recorded using two inclinometer tubes. The face displacements were recorded topographically in points spaced approximately 1.2m vertically along the face of the slope on the km 0 + 150 cross section. The reinforced slope behaviour was observed during a period of about 13 months, which includes three months of construction period. This way it was possible to obtain information about the slope behaviour during and after construction (the first 10 months of service). The behaviour of the observed reinforced slope is characterized by: low values of face displacements, slope internal horizontal displacements and reinforcement strains; change of the face displacements configuration at the end of construction during service; tendency to stabilization of the horizontal displacements in a relatively short period of service; change, during service, of the position of the line passing through the points of the reinforcements where maximum strains were recorded. The reinforced slope behaviour express the conservative design of Equilibrium Limit methods and encourage the research on new design methods for geosynthetic reinforced soil systems.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 19
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