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http://dx.doi.org/10.7843/kgs.2012.28.8.21

Evaluation of at Rest Lateral Stress Coefficient Influenced by Particle Condition  

Lee, Jung-Hwoon (Dept. of Civil and Environmental Engineering, Yonsei Univ.)
Lee, Dong-Ryeol (Dept. of Civil and Environmental Engineering, Yonsei Univ.)
Yun, Tae-Sup (Dept. of Civil and Environmental Engineering, Yonsei Univ.)
Lee, Jun-Hwan (Dept. of Civil and Environmental Engineering, Yonsei Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.28, no.8, 2012 , pp. 21-29 More about this Journal
Abstract
At-rest lateral stress coefficient that is used for the evaluation of geotechnical structures such as foundations and retaining walls plays a significant role in the analysis and design, as a state variable of in-situ stress condition. In the widely applied Jaky's Ko equation stress condition can be inferred from the internal friction angle obtainable from the laboratory experimentation whereas the eguation mares it challenging to evaluate the influences and criteria of particle characteristics which is essential for the application of friction angles in practices. Thus, this study experimentally explored the behaviors of Ko depending on the relative density, particle shape, and surface roughness effect during a range of loading stages. The Ko values of Jumumjin sand, glass beads, and etched glass beads were measured using a customized Ko device housing strain gauges during loading-unloading-reloading steps, and the effect of dominant factors on Ko is analyzed. Results show that the high Ko prevails for both round and angular specimens with low relative density and the surface roughness has a nominal effect. The angular particles exhibit low Ko for specimens with similar relative density. The characteristics of relevance between Ko and friction angles with varying relative density are also investigated based on the experimental results using empirical correlations and previously reported values.
Keywords
At rest lateral stress; Particle shape; Surface roughness; Jaky solution; Relative density;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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