关键词: 土石坝, 突发事件, 特征分析, 应急监测

Abstract: The safety of embankment dams in the unexpected events has always been the focus of attention. The study on feature analysis of unexpected events and emergency monitoring may improve the vulnerability of embankment dams in unexpected events. In this paper, the definition of unexpected event is introduced. Combined with the statistical results of the causes of dam failure and the types of the reservoir dam unexpected events, it is considered that the unexpected events of embankment dams can be classified as flood and earthquake. On this basis, the classification standard of reservoir dam unexpected events is given. The harmful characteristics and hazards of overtopping, seepage failure, slope instability and spillway damage caused by flood as well as the cracks, seepage, landslide and structural deformation caused by earthquake are also analyzed. Based on the characteristic analysis of the unexpected events, the items and frequency requirements of emergency monitoring for embankment dams under flood and earthquake at different levels are discussed, which can provide guidance for emergency disposal.

Key words: embankment dams, unexpected events, feature analysis, emergency monitoring