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http://dx.doi.org/10.7843/kgs.2020.36.12.69

Numerical Analysis for Optimal Reinforcement Length Ratio According to Width-to-Height Ratio of Back-to-Back MSE  

Park, Choon-Sik (School of Civil, Environmental and Chemical Engrg., Changwon National Univ.)
Kim, Dong-Kwang (Korea Expressway Corporation)
Publication Information
Journal of the Korean Geotechnical Society / v.36, no.12, 2020 , pp. 69-76 More about this Journal
Abstract
Since the mechanically stabilized earth walls have a form of retaining wall compatible with a narrow section, the geogrid overlaps according to the separation distance between the walls. There is a problem that the overall behavior may occur in the state of being integrated with the stress change due to the interaction of the geogrid. Therefore, a careful approach is required at the design stage, but there are currently no design criteria or guidelines in Korea. This study investigated the optimal reinforcement length ratio according to the retaining wall width to height ratio (width to height ratio, Wb/H) for these back-to-back mechanically stabilized earth walls. Retaining wall width ratio is 1.1H, 1.4H, 1.7H, 2.0H for Case II of the FHWA design standard, and the height is 3.0 m, 5.0 m, 7.0 m, and 10.0 m, which are most commonly applied. Through numerical analysis, the appropriateness of the FHWA design standard and the optimal reinforcement length ratio according to the height of the retaining wall and the width of the retaining wall were proposed.
Keywords
Back-to-Back mechanically stabilized earth walls; Reinforcement length ratio; Width-to-Height ratio;
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