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在大坝安全风险评估的基础上，从经济性的角度出发，利用风险决策原理，对优选病险大坝安全改造方案的风险决策模型和求解方法进行了探讨，并给出了一个示例．该示例表明，所建立的风险决策模型是合理的和可行的．
Based on the dam safety risk assessment, the risk decision-making model and solution method of the optimal risk dam reconstruction project are discussed from the economic point of view and an example is given by using the risk decision principle. This example shows that the established risk decision model is reasonable and feasible.