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本文以辽宁省内某座已建水电站的混凝土重力坝为例,按照刚体极限平衡条件,分别用定值法和可靠度分析法计算了该坝的抗滑稳定安全度。在可靠度分析中考虑了岩石抗剪指标及混凝土容重γ的随机性,对重力坝抗滑稳定的影响,因而,对比这两个方法的计算结果,可以证明可靠度分析法能比定值法更全面,更客观地反映了重力坝工作的可靠性。
In this paper, a concrete gravity dam of a hydropower station in Liaoning Province has been taken as an example. According to rigid body limit equilibrium conditions, stability and stability of the dam against sliding have been calculated by the method of fixed value and reliability. Considering the randomness of the rock shear index and the concrete bulk density γ in the reliability analysis, the stability of the gravity dam is analyzed. Comparing the calculation results of these two methods, it can be proved that the reliability analysis method is better than the fixed value method More comprehensively and objectively reflect the reliability of gravity dam work.