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Geosynthetic-Reinforced Road Embankment on Sabkha Soil
Sabkha soils are recent saline sediments widely distributed in Algeria and cover vast areas. They are characterized by low strength and high compressibility. Therefore, the sabkha deposit is considered as a difficult foundation soil and poses special problems for engineers to design and construct any structure on it. This study deals with the improvement of the stability of road embankment on sabkha soil using geosynthetic reinforcement method. Numerical analyses were performed using the finite element software Plaxis 2D-2010, and the results show that geosynthetic reinforcement is an efficient improvement technique in particular during construction phase. Numerical analyses of the road embankment using the finite element software Plaxis 2D-2010 show that the use of geosynthetic reinforcement reduces the vertical displacements by about 3% in short term and 1% in long term. On the other hand, the maximum lateral displacements under the embankment toe were reduced by about 3% in short term and 13% in long term. The factor of safety against overall stability increases by about 17% at the end of construction which indicates that geosynthetic reinforcement play an important role in the short term stability of embankments founded on soft soils. The geosynthetic reinforcement seems to have no effect on the pore pressure dissipation, which is in good agreement with the results reported by Kamal et al. (2005), Liu et al. (2008) and Siavoshnia et al. (2010). It should be noted that no instruments have been installed to monitor the embankment performance. However, since its completion, the embankment has performed well. Observations during the site visit in July 2013 (about 3 years after the embankment construction) confirmed that there was no evidence of unacceptable movements in the embankment.
Geosynthetic-Reinforced Road Embankment on Sabkha Soil
Sabkha soils are recent saline sediments widely distributed in Algeria and cover vast areas. They are characterized by low strength and high compressibility. Therefore, the sabkha deposit is considered as a difficult foundation soil and poses special problems for engineers to design and construct any structure on it. This study deals with the improvement of the stability of road embankment on sabkha soil using geosynthetic reinforcement method. Numerical analyses were performed using the finite element software Plaxis 2D-2010, and the results show that geosynthetic reinforcement is an efficient improvement technique in particular during construction phase. Numerical analyses of the road embankment using the finite element software Plaxis 2D-2010 show that the use of geosynthetic reinforcement reduces the vertical displacements by about 3% in short term and 1% in long term. On the other hand, the maximum lateral displacements under the embankment toe were reduced by about 3% in short term and 13% in long term. The factor of safety against overall stability increases by about 17% at the end of construction which indicates that geosynthetic reinforcement play an important role in the short term stability of embankments founded on soft soils. The geosynthetic reinforcement seems to have no effect on the pore pressure dissipation, which is in good agreement with the results reported by Kamal et al. (2005), Liu et al. (2008) and Siavoshnia et al. (2010). It should be noted that no instruments have been installed to monitor the embankment performance. However, since its completion, the embankment has performed well. Observations during the site visit in July 2013 (about 3 years after the embankment construction) confirmed that there was no evidence of unacceptable movements in the embankment.
Geosynthetic-Reinforced Road Embankment on Sabkha Soil
Moussai, B. (author)
2015
6 Seiten, Bilder, Quellen
Conference paper
Storage medium
English
| Springer Verlag | 2015
Geosynthetic Reinforced Full Scale Test Embankment on Soft Soil
| British Library Conference Proceedings | 2001
Geosynthetic Reinforced Full Scale Test Embankment on Soft Soil
| British Library Conference Proceedings | 2000