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http://dx.doi.org/10.12814/jkgss.2012.11.4.027

Effects of Vertical Spacing and Length of Reinforcement on the Behaviors of Reinforced Subgrade with Rigid Wall  

Kim, Dae-Sang (Korea Railroad Research Institute)
Park, Seong-Yong (Hanwha Engineering and Construction)
Kim, Ki-Hwan (Sampyo engineering and construction)
Publication Information
Journal of the Korean Geosynthetics Society / v.11, no.4, 2012 , pp. 27-35 More about this Journal
Abstract
Facings of mechanically stabilized earth retaining walls have function to fix the reinforcement and prevent backfill loss, but the walls are lack of structural rigidity capable of resisting applied loads. The reinforced subgrade with rigid wall was developed to have the structural functions under train loading. Though it has lots of advantages such as small deformation after construction, its negative side effects of economics and difficult construction were mainly mentioned and not practically used. To apply it for railroad subgrade, this study focus on the construction cost down and the enhancement of constructability without functional loss. To do so, the behaviors of reinforced subgrade with rigid wall were evaluated with the change of the vertical spacing and length of reinforcement. Small scale model tests (1/10 scale) and 3 m full scale tests were performed to evaluate deformation characteristics of reinforced subgrade under simulated train loading. Even though it uses short reinforcement, it showed small horizontal displacement of wall and plastic settlement of subgrade. Also, it was verified that not only 30 cm but also 40 cm of vertical spacing of reinforcement had good performance in serviceability aspects.
Keywords
Rigid wall; Railroad; Reinforced subgrade; Full scale test; Spacing;
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  • Reference
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