SUCCESSIVE SEISMIC REFLECTION METHODS AIDED TO FIND THE CHANGE OF STRUCTURE AND MATERIAL PROPERTIES IN CENTER CORE TYPE EARTH-FILL DAM
We adopted successive seismic reflection methods to investigate the change of structure and material properties in dam. The dam, named Angye Dam, is a kind of center cored earth-fill dam, located on the Hyungsan river at the southeast of Korea. The embankment rises 32.5m above the foundation, and is 223.5m long. After about 30 years of operation a lot of slumps similar to cracks, seepage and some boggy areas had been observed on the downstream slope. In this situation, the seismic reflection methods were applied to investigate whether these incidents and their causes would influence the dam safety hazards. Before these incidents happened, some reinforcement methods had been made to increase safety of dam already. However, owing to the heavy rain in 2003 summer season, some downstream part of dam slid down. After the sliding, follow-up emergency actions to remedy the dam were made using material substitution filling method and loading berm method within short time and the comprehensive reinforcement including permeation grouting in core of the dam were conducted also for a long time. After comprehensive reinforcement including permeation grouting, the seismic reflection methods were applied again and the results show clear differences in structure and material properties. It seems that the seismic reflection method is an efficient tool for delineation of earth-fill dam structure and for estimation of material properties.
Seismic reflection survey earth-fill dam Reinforcement of dam Permeation grouting Geophysical methods
Kim, Hyoung-Soo Kim, Jung-Yul Kim, Yoo-Sung
Director, Korea Water Resources Corporation, Groundwater & Geotechnics Research Center,461-1, Jeonmi C.E.O., Soam Consultant Co., Ltd., 30, Gajeong-dong, Yuseong-Gu, Daejeon, 305-350, Korea Director of research and services, Soam Consultant Co., Ltd., 30, Gajeong-dong, Yuseong-Gu,Daejeon,
国际会议
西安
英文
1-16
2005-11-01（万方平台首次上网日期，不代表论文的发表时间）