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Building of Large Triaxial Testing Apparatus and Static Triaxial Testing for Railway Ballast  

Lee, Sung-Jin (한국철도기술연구원 철도구조연구실)
Kim, Yun-Ki (한국철도기술연구원 철도구조연구실)
Lee, Il-Wha (한국철도기술연구원 철도구조연구실)
Lee, Jun-S. (한국철도기술연구원 차륜궤도연구실)
Park, Jae-Jun (케이엔알시스템 선행연구팀)
Publication Information
Journal of the Korean Society for Railway / v.13, no.1, 2010 , pp. 84-91 More about this Journal
Abstract
We built multi-purpose large triaxial testing system that can test and evaluate various geotechnical design parameters such as shear strength, deformation modulus and stress-strain behaviour for large diameter granular materials, which are the most commonly used construction materials in the railway, road embankments. The details of the built testing system and the results obtained from static triaxial test carried out for gneiss ballast material are discussed within the scope of this paper. Ballast is hardly saturated and is confined at low overburden pressure, since the depth is shallow and the permeability is very high. Herein we ascertained that the confining pressure can effectively be controlled by vacuum. The rational trend could be checked up through triaxial test results such as shear strength, deformation, and particle breakage. And the shear strength envelope could be non-linearly represented with the parent rock strength, confining pressure of the triaxial test and proper parameters.
Keywords
Large Triaxial test; Shear Strength; Degradation; Granular material; Ballast;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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