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http://dx.doi.org/10.5389/KSAE.2022.64.3.045

Characteristics of Deformation Modulus and Poisson's Ratio of Soil by Unconfined Loading-Reloading Axial Compression Process  

Song, Chang-Seob (Department of Agricultural and Rural Engineering, Chungbuk National University)
Kim, Myeong-Hwan (Department of Agricultural and Rural Engineering, Chungbuk National University)
Kim, Gi-Beom (Department of Agricultural and Rural Engineering, Chungbuk National University)
Park, Oh-Hyun (Department of Agricultural and Rural Engineering, Chungbuk National University)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.64, no.3, 2022 , pp. 45-52 More about this Journal
Abstract
Prediction of soil behavior should be interpreted based on the level of axial strain in the actual ground. Recently numerical methods have been carried out focus on the state of soil failure. However considered the deformation of soil the prior to failure, mostly the small strain occurring in the elastic range is considered. As a result of calculating the deformation modulus to 50% of the maximum unconfined compression strength, Deformation modulus (E50) showed a tendency to increase according to the degree of compaction by region. The Poisson's ratio during loading-unloading was 0.63, which was higher than the literature value of 0.5. For the unconfined compression test under cyclic loading for the measurement of permanent strain, the maximum compression strength was divided into four step and the test was performed by load step. Changes in permanent strain and deformation modulus were checked by the loading-unloading test for each stage. At 90% compaction, the permanent deformation of the SM sample was 0.21 mm, 0.37 mm, 0.6 mm, and 1.35 mm. The SC samples were 0.1 mm, 0.17 mm, 0.42 mm, and 1.66 mm, and the ML samples were 0.48 mm, 0.95 mm, 1.30 mm, and 1.68 mm.
Keywords
Cyclic loading; unconfined compression stress; poisson's ratio; deformation modulus;
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Times Cited By KSCI : 5  (Citation Analysis)
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