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http://dx.doi.org/10.9720/kseg.2016.2.207

Potential Hazard Classification of Aged Cored Fill Dams  

Park, DongSoon (K-water Institute, Korea Water Resources Corporation)
Oh, Je-Heon (K-water Institute, Korea Water Resources Corporation)
Publication Information
The Journal of Engineering Geology / v.26, no.2, 2016 , pp. 207-221 More about this Journal
Abstract
As greater numbers of fill dams and reservoirs become old, the risks of damage or embankment collapse increases. However, few studies have considered the deterioration and hazard classification of the internal core layers of fill dams. This study reports the results of geotechnical investigations of 13 earth-cored fill dams in Korea, based on no-water borehole drilling, Standard Penetration Test, and 2D and 3D electrical resistivity surveys along with in situ and laboratory testing. High-capacity no-water boring minimized core layer disturbance while providing continuous core sample recovery. The results allow the classification of potential hazards related to the existing core layers based on both visual inspection of the recovered samples and the results of engineering surveys and tests. Four types of potential hazard are classified: locally fluidized core with a high water content, rapid water inflow to a borehole, cores with granular materials, and relatively low stiffness of core. Among these, the locally fluidized core is the most critical hazard that requires remedial action because it is related to the potential internal flow path and internal erosion. The other three hazard types are of medium importance and require careful monitoring and regular inspection. Of note, there was no correlation between age and core deterioration. The results are expected to aid the safe management and potential upgrading of aging cored fill dams.
Keywords
fill dam; core zone; hazard classification; geotechnical investigation; dam aging;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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1 Biswasm, A. K. and Chatterjee, S., 1971, Dam disasters: an assessment, Engineering Journal, 54(3), 21-27.
2 Fell, R., MacGregor, P., Stapledon, D., Bell, G., and Foster, M., 2015, Geotechnical engineering of dams (2nd ed.), CRC Press, Boca Raton.
3 Foster, M. A. and Fell, R., 1999, A framework for estimating the probability of failure of embankment dams by internal erosion and piping using event tree methods, UNICIV Report R-377. the University of New South Wales, Sydney, Australia, ISBN 85841 344 2.
4 ICOLD, 1994, Ageing of dams and appurtenant works - Review and recommendations, ICOLD Bulletin 93.
5 Idriss, I. M. and Boulanger, R. W., 2008, Soil liquefaction during earthquake, Earthquake Engineering Research Institute.
6 Kim, J. -Y., Gwon, H. -H., Jung, Y. -H, Na, B. -G., and Im, J.-Y., 2014a, Probabilistic and statistical risk analyses procedure of dams, Magazine of Korea Water Resources Association, 47(7), 36-47 (in Korean with English abstract).
7 Kim J. -Y., Gwon, H. -H., and Im, J. -Y., 2014b, Probabilistic risk analysis based dam hazard evaluation, Magazine of Korean Society of Hazard Mitigation, 14(1), 64-74 (in Korean with English abstract).
8 Kim, S. I., Kim, D. S., Yum, K. T., and Choo, Y. W., 2011, Static and dynamic material properties and aging characteristics of dam core material, Journal of Korean Society of Civil Engineers, 31(6C), 221-229 (in Korean with English abstract).
9 Kim, W. Y., Lim, J. Y., and Jung, Y. H., 2015, Geotechnical risk factors in fill dams in Korea selected using dam risk assessment tool, the Korean Society of Civil Engineers Conference, 67-68 (in Korean with English abstract).
10 KWRA, 2011, Dam design standard, Korea Water Resources Association (in Korean).
11 Lee, S. J., Lim, H. D., and Park, D. S., 2015, Structural-Health evaluation for core zones of fill Dams in Korea using electrical resistivity survey and no water boring method, Journal of the Korean Geo-Environmental Society, Korean Geo-Environmental Society, 16(8), 21-35 (in Korean with English abstract).   DOI
12 MPSS (Ministry of Public Safety and Security), 2015, Status on safety management for disaster prevention of dams and reservoirs, The 2nd Water Resources SOC Safety Forum, Sep. 2, 2015, Daejeon, Korea (in Korean).
13 Lim, J. Y., Oh, S. H., Jang, B. S., Kim, B. J., and Lim, E. S., 2006, Risk factor analysis for failure characteristics of fill dam, Korean Geotechnical Society Spring Conference, 794-799 (in Korean with English abstract).
14 Lim, S. S. and Lim, H. D., 2008a, Mechanism of the internal erosion and the piping in embankment dams, Journal of the Korean Society of Civil Engineers, 56(11), 34-39 (in Korean with English abstract).
15 Lim, S. S. and Lim, H. D., 2008b, Statistical analysis of the causes of the embankment dam incidents and the importance of piping, Journal of the Korean Society of Civil Engineers, 57(7), 73-79 (in Korean with English abstract).
16 Noh, K. L., 2015, Risk assessment for geotechnical failure of reservoir using event tree analysis, PhD. Thesis, KyungHee University (in Korean with English abstract).
17 Noh, K. L., Lim, J. Y., Mok, Y. J., and Jung, Y. H., 2014, Estimating geotechnical system response probability of internal erosion risk in fill dam using event tree analysis, Journal of the Korean Society of Civil Engineers, 34(6), 1815-1829 (in Korean with English abstract).   DOI
18 Oh, J. and Park, D. S., 2016, Statistical analysis on in-situ material properties of cores for aging earth-cored rockfill dams, The Journal of Korean Society of Hazard Mitigation, in print (in Korean with English abstract).
19 Oh, S. H. and Sun, C. G., 2008, Combined analysis of electrical resistivity and geotechnical SPT blow counts for the safety assessment of fill dam, Environmental Geology, 54(1), 31-42 (in Korean with English abstract).   DOI
20 Park, D. S. and Shin, D. -H., 2016, Engineering characterization of aging cores of earth-cored fill dams, The 84th ICOLD Annual Meeting, May 15 - 20, 2016, Johannesburg, South Africa.
21 Skempton, A. W., 1986, Standard penetration test procedures and the effects in sands of overburden pressure, relative density, particle size, ageing and overconsolidation. Geotechnique, 36(3), 425-447.   DOI
22 Wan, C. F., 2005, Experimental investigation of piping erosion and suffusion of soils in embankment dams and their foundations, PhD. Thesis, the University of New South Wales, Sydney, Australia.