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http://dx.doi.org/10.12652/Ksce.2016.36.3.0535

A Study on CBR Characteristics of National Highway in Yeongnam Region  

Park, Yeong-Mog (Yeungnam University)
Lee, Go-Hyeun (Busan Regional Office of Construction Management)
Kim, Nak-Seok (Kyeonggi University)
Cho, Gyu-Tae (Yeungnam University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.36, no.3, 2016 , pp. 535-543 More about this Journal
Abstract
This study has been carried out to evaluate the CBR characteristics and the correlations among every soil properties of National road in Yeongnam region. Total of 480 soil samples were collected from 41 administrative districts for more than 30 years. Their physical and mechanical properties such as natural water content, the Atterberg limit, No. 200 sieve passing, the compaction test and the CBR test results were involved. The soils in Yeongnam region, SM, SC, SP and CL by USCS have predominated approximately 79%. The test results show that average CBR values of gravel and sand range from 12.7% to 20.3% and those of silt and clay range from 4.8% to 7.1%. It means that average CBR values of fine grained soils are less than a half of coarse grained one. Natural water content, No. 200 sieve passing, optimum moisture content and maximum dry density of soils are well correlated with CBR values. Especially, it presents that No. 200 sieve passing is the best correlation factor with CBR value. If consider the partition off this region into 6 zones of classified by mother rock, the correlation between CBR value and every soil properties tends to increase. It is suggested that tables, figures and the regressions described in this paper may be available for designers and engineers to understand the characteristics of an embankment materials in Yeongnam region.
Keywords
CBR; Natural water content; No. 200 seive passing; Optimum moisture content; Maximum dry density; Yeongnam region;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 Geological Society of Korea (1987). Korean geological maps, The Geological society of korea, p. 30 (in Korean).
2 Gibbs, H. J. and Holtz, W. G. (1957). "Research on determining the density of sand by spoon penetration test." Proc. 4th ICSMFE, Vol. 1, pp. 35-39.
3 Johnson, A. W. and Sallberg, J. R. (1960). "Factors that influence field compaction of soils." Highway Research Board Bulletin, No. 272.
4 Kang, H. B., Kim, K. J., Park, S. K. and Kim, J. R. (2008). "A study on the relation between dynamic deflection modulus and in-situ CBR using a portable FWD." Journal of the Korea institute for structural maintenance and inspection, Korea Institute for Structural Maintenance and Inspection, Vol. 12, No. 2, pp. 149-155 (in Korean).
5 Min, G. H., Lee, C. K. and Heo, Y. (2002). "Estimation of the mean CBR for the subgrade layer including the anti-frost layer." Journal of the Korean Geoenvironmental Society, Korean Geo-Environmental Society, Vol. 3, No. 1, pp. 57-66 (in Korean).
6 Park, H. G. and Kim, K. R. (2003). "A study of correlation between soil characteristic and CBR value by experimented method." Journal of the Korean Geoenvironmental Society, Korean Geo-Environmental Society, Vol. 4, No. 1, pp. 41-48 (in Korean).
7 Pearson, K. (1896). "Mathematical contributions to the theory of evolution. -On a Form of Spurious Correlation Which May Arise When Indices are Used in the Measurement of Organs." Proceedings of the royal society of london, Royal Society, Vol. 60, No. 359-367, pp. 489-498.   DOI
8 Son, T. G. and Kwon, M. N. (1996). "Correlation analysis between geotechnical properties and CBR values of subgrade materials in rural road construction." Journal of the Korean Society of Agricultural Engineers, The Korean Society of Agricultural Engineers, Vol. 38, No. 4, pp. 89-98 (in Korean).