Numerical analysis of effective hybrid sandwiched reinforcement for cohesive soils

S. Yamazaki, K. Yasuhara, H. Komine, S. Murakami, H. Mohri, T. Hori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We developed a new construction technique called Hybrid Sandwiched Reinforcement (HBS) method, by which thin sand layers are placed above and beneath a geosynthetic fabric to increase the mechanical potential of cohesive soil embankments and foundations. This reinforcement method improves reinforcement and maintains hydraulic conductivity. Successive to the authors' previous works, this paper describes numerical analysis of embankment with and without reinforcement and a sand layer. Results from numerical analyses are interpreted with emphasis on improved toughness of HBS-reinforced embankments. Results clarified that HBS not only controls embankment deformation, it improves toughness using placement of geosynthetics in an embankment comprising cohesive soils such as Kanto loam of volcanic-ash origin. Regarding improved toughness of HBS earth structures, the numerical analysis results show that the sandwich structure improves the cohesive soil embankments' bearing capacity and stiffness. Placement of thin sand layers above and below non-woven geosynthetics and their high potential for drainage make non-woven geosynthetics more suitable for sandwiched earth structures consisting of cohesive soils, particularly cohesive soils of volcanic origin. Results are superior to those of geonets or geogrids, which are widely used for sandy soil reinforcement.

Original languageEnglish
Title of host publication9th International Conference on Geosynthetics - Geosynthetics
Subtitle of host publicationAdvanced Solutions for a Challenging World, ICG 2010
PublisherBrazilian Chapter of the International Geosynthetics Society
Pages1703-1708
Number of pages6
ISBN (Print)9788563456007
Publication statusPublished - 2010 Jan 1
Externally publishedYes
Event9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010 - Guaruja, Brazil
Duration: 2010 May 232010 May 27

Publication series

Name9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010

Conference

Conference9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010
CountryBrazil
CityGuaruja
Period10/5/2310/5/27

Keywords

  • Geosynthetics
  • Numerical analysis
  • Sandwiched method

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Yamazaki, S., Yasuhara, K., Komine, H., Murakami, S., Mohri, H., & Hori, T. (2010). Numerical analysis of effective hybrid sandwiched reinforcement for cohesive soils. In 9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010 (pp. 1703-1708). (9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010). Brazilian Chapter of the International Geosynthetics Society.