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Construction of Correlation between Basic Soil Properties and Deformation Modulus of Trackbed Soils Based on Laboratory and Field Mechanical Tests
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 Title & Authors
Construction of Correlation between Basic Soil Properties and Deformation Modulus of Trackbed Soils Based on Laboratory and Field Mechanical Tests
Park, Jae Beom; Choi, Chan Yong; Ji, Sang Hyun; Lim, Sang Jin; Lim, Yu Jin;
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The soils used as trackbed in Korea are selected using USCS utilizing basic soil properties such as Grain Size Distribution(GSD), % passing of #200 sieve (), % passing of #4 sieve (), Coefficient of uniformity (), and Coefficient of curvature (). Degree of compaction of the soils adapted in the code by KR should be evaluated by maximum dry density () and deformation modulus . The most important influencing factor that is critical to stability and deformation of the compacted soils used as trackbed is stiffness. Thus, it is necessary to construct a correlation between the modulus and the basic soil properties of trackbed soil in order to redefine a new soil classification system adaptable only to railway construction. To construct the relationship, basic soil test data is collected as a database, including GSD, maximum dry unit weight (), OMC, , , , , etc.; deformation modulus and are obtained independently by performing a Repeated Plated Bearing Test (RPBT) and Light Weight Deflectometer Test (LWDT) for ten different railway construction sites. A linear regression analysis is performed using SPSS to obtain the relationship between the basic soil properties and the deformation modulus and . Based on the constructed relationship and the various obtained mechanical test data, a new soil classification system will be proposed later as a guideline for the design and construction of trackbed foundation in Korea.
Trackbed Soil classification;Basic properties;Stiffness;Deformation Modulus;Performance design;
 Cited by
RTRI (2007) Railway Structure and Design Standards Commentator, Railway Technical Research Institute.

DIN 18 196 (2011) Soil classification for civil engineering purposes and methods of soil indentification, Deutsche Industrienormen.

RTRI (1992) Railway Structure and Design Standards Commentator, Railway Technical Research Institute.

AASHTO (2004) Guide for mechanistic-empirical design, American Association of State Highway and Transportation Officials, National Cooperative Highway Research Program.

M.W. Witczak (2000) Resilient Modulus as Function of Soil Moisture A study of the expected changes in resilient modulus of the unbound layers with changes in moisture for 10 LTPP sites, Inter Team Technical Report Seasonal 2, NCHRP 1-37A.

D. Li and E.T. Selig (1994) Resilient modulus for fine-grained subgrade soil, Journal of Geotechnical Engineering Proceedings of ASCE, 120(6), pp. 939-957. crossref(new window)

Zhang, Chaohan (2004) The effect of high groundwater level on pavement subgrade performance, Ph.D Thesis, Florida State University.

W.V. Ping (2007) Enhancement of Resilient Modulus Data for the Design of Pavement Structures in Florida, Florida Department of Transportation.

KR (2013) Design Specification for Railroad, Korea Rail Network Authority.

DIN 18 134 (1993) Plattendruckversuch, Deutsches Institut C Institut fur Normung e. V, Deutsche Industrienormen.

KRRI (2012) Development of Asphalt Roadbed and Track System suited to Speed Up, report for the Korea Railroad Research Institute.

Y.J. Lim, C.Y. Choi, J.W. Lee, H.J. Cho (2015) Correction factors for modulus calculation equation used in light weight deflectometer considering track foundation, Journal of the Korean Society for Railway, 18(1), pp. 53-62. crossref(new window)

D.S. Kim (2012) Evaluation of modulus and load-settlement characteristics of subgrade soil used in track foundation, Master's Thesis, PaiChai University.

C.Y. Choi, E.C. Shin, H.H. Kang (2012) Prediction of plastic settlement of roadbed materials through cyclic loading test, Korea Geosynthetics Society, 11(3), pp.1-9.

G.H. Kweon, J.N. Jo, T.J. Hwang (2009) Correlation model between strength and stiffness characteristics for subgrade soils in Korea, Korea Society of Road Engineers, 11(4), pp.17-23.

S.W. Park, C.H. Lee, K.Y. Hwang (2006) Effect of density on water content reflectometer measured field water content in pavement subgrades, Journal of the Korean Society of Road Engineers, 8(3), pp. 115-127.

C.Y. Choi, J.B. Park, S.J. Lim, S.H. Ji, Y.J. Lim (2015) Development of correlation between soil properties and modulus of subgrade soils used as trackbed, 2015 Spring Conference of the Korea Society for Railway, Korea, pp. 1047-1052.

R.F. Pezo, D.S. Kim, K.H. Stoke and W.R. Hudson (1991) Developing a reliable resilient modulus testing system, Transpotation Research Record 1307, Washington D. C, pp. 98-99.

K.R. Massarsch (2004) Deformation properties of fine-grained soils from seismic test, Keynote lecture, International Conference on site Characterization, Milpress, Porto, p. 14.

H.B. Seed, R.T. Wang, I.H. Idriss and K. Tokimuatsu (1984) Moduli and damping factors for dynamic analysis of cohesionless soil, College of Engineering, University of California, pp. 1-34.