Evaluation of pullout and drainage properties of geosynthetic reinforcements in weathered granite backfill soils |
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| Authors: | Hankyu Yoo Hongtaek Kim Hanyong Jeon |
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| Institution: | (1) Division of Nano-Systems Engineering, Inha University, 402-751 Incheon, Korea;(2) Department of Civil & Environment Engineering, Hanyang University, 426-791 Ansan, Korea;(3) Department of Civil Engineering, Hongik University, 121-791 Seoul, Korea |
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| Abstract: | The main aim of this research is to systematize the reinforced-earth wall system using the geosynthetic reinforcements in
the weathered granite backfill soils containing relatively large amount of fines with low permeability. As a staged endeavor
to accomplish this purpose, laboratory pullout tests and finite element modeling are carried out focusing on the analysis
of friction characteristics associated with interaction behaviors of the geosynthetic reinforcements composed of geogrid with
outstanding tensile resistance and geotextile with a sufficient drainage properties. In addition, drainage effects of the
geotextile laid below the geogrid are examined based on the analysis of finite difference numerical modeling. From the present
investigation, it is concluded that the geosynthetic reinforcements in the weathered granite backfills can be used to achieve
combined effects of the reduction of deformations and the increase of tensile resistance, together with drainage effects. |
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| Keywords: | Reinforced-earth wall system Geosynthetic reinforcements Weathered granite backfill soils Pullout tests Finite element modeling Drainage effects |
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