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Dangerous reservoirs in China face a lot of wide , the presence of these dangerous reservoirs has seriously hampered the economic and social development , threatening the safety of people 's lives and property . In the face of such a grim situation , the countries gave high priority to the issue of dam safety . In recent years , learn from foreign experience to carry out the dam risk analysis , in order to strengthen the management of the safety of the dam . Risk analysis of its contents , can be divided into risk identification , risk estimation and risk evaluation . In this paper, the actual situation of the Eastern Zhou Reservoir , a comprehensive analysis of its security identification and evaluation and reinforcement design based on on the Dongzhou reservoir risk analysis . First, risk identification , problems existed before and after the reinforcement of the dam , look for the dam all possible failure mode , failure mode screening model created from all possible modes , filter out the biggest threat to dam safety mode . Inferred based on these failure mode the dam may crash path . Second , the risk estimates , the introduction of the event tree risk of dam failure rate , estimate the crash risk rate before and after reinforcement , reinforcement before and after the crash risk compared to identify the weak links in the reinforcement work to leak filled for the the dam further reinforcement, provide the basis . Compare before and after reinforcement of risk before the learned reinforcement after the crash risk than reinforcement significantly reduced , but due to the reinforcement work is not processing spillway gate there is a big risk of potential problems to reinforced dam risk basis , making the reinforcement , therefore , need immediate reinforcement processing spillway gate . Problems exist for the the Dongzhou reservoir spillway gate status quo , to ensure dam safety , it is recommended that the demolition and reconstruction of the spillway gates . In this paper, the reconstruction program of the spillway gate .
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