Page - 1334 - in Book of Full Papers - Symposium Hydro Engineering

Figure 9. Status of leakage for the subject dam 3. CONCLUSION In case of displacement behaviors, x & y directions were little difference between before and after earthquake, but z direction after earthquake was different from before that. This could mean that all points had a change and small displacement occurred on a dam. In additional analysis about change of vertical displacement, maximum displacement occurred on the middle of dam crest. In an urgent field inspection, however, there were no damages by gyeongju earthquake such as crack or breakage of pavement on dam crest, faced slab and change of arrangement for downstream slope. The leakage status before and after earthquake was similar, variation was stable. It seemed that leakage was not affected by earthquake and the leakage measuring system was considered to have no problem to operate. As a comprehensive result of inspection and behavior analysis, there are no external damages in the subject dam and leakage measuring was normal and stable. Therefore, it seemed that the subject dam was affected by earthquake but safety and operation of dam structure was evaluated to have no problem. In spite of no problem about dam safety, dam structure needs in-depth survey using control points because influenced by earthquake. Time (Day) , September, 2016 20 15 10 5 0 0 5 10 15 20 0 400 800 1200 1600 100 105 110 115 Quantity of leakage (L/min) Turbidity 1~10th day Occurance of Earthquake (2016. 9. 12) 21~30th day11~20th day 1334