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Potential Hazard Classification of Aged Cored Fill Dams
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  • Journal title : The Journal of Engineering Geology
  • Volume 26, Issue 2,  2016, pp.207-221
  • Publisher : The Korea Society of Engineering Gelolgy
  • DOI : 10.9720/kseg.2016.2.207
 Title & Authors
Potential Hazard Classification of Aged Cored Fill Dams
Park, DongSoon; Oh, Je-Heon;
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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.
fill dam;core zone;hazard classification;geotechnical investigation;dam aging;
 Cited by
저압 침투그라우팅에 의한 필댐 제체의 안정화,박동순;임희대;

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