Numerical analysis of effective hybrid sandwiched reinforcement for cohesive soils

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

研究成果: Conference contribution

抄録

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.

本文言語English
ホスト出版物のタイトル9th International Conference on Geosynthetics - Geosynthetics
ホスト出版物のサブタイトルAdvanced Solutions for a Challenging World, ICG 2010
出版社Brazilian Chapter of the International Geosynthetics Society
ページ1703-1708
ページ数6
ISBN(印刷版)9788563456007
出版ステータスPublished - 2010 1 1
外部発表はい
イベント9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010 - Guaruja, Brazil
継続期間: 2010 5 232010 5 27

出版物シリーズ

名前9th 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
国/地域Brazil
CityGuaruja
Period10/5/2310/5/27

ASJC Scopus subject areas

  • 地盤工学および土木地質学

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