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对中国《碾压式土石坝设计规范》(DL/T 5395-2007)和欧洲岩土工程设计规范Eurocode 7关于坝坡抗滑稳定分项系数设计方法进行了较为系统的比较.着重比较了分项系数设计法的分项系数取值、参数特征值取值以及抗滑稳定计算方法三方面.通过一个土石坝算例研究了中国与欧洲规范关于分项系数设计方法在土石坝抗滑稳定分析中的应用,并从相当安全系数和失效概率两方面对两规范安全度水平进行了对比.由算例分析可以看出基于概率极限状态设计原则的分项系数设计方法可以更好地考虑设计参数的不确定性.欧洲规范设计的土石坝抗滑稳定失效概率明显大于中国规范设计的土石坝抗滑稳定失效概率.基于Eurocode 7推荐的Schneider方法和中国规范规定的小值平均值确定的特征值计算的失效概率略大于采用参数均值计算的失效概率.
A systematic comparison was made between China’s “Code for Design of Roller Compacted Embankment Dam” (DL / T 5395-2007) and Eurocode 7’s design method of subgrade coefficient of anti-sliding stability of dam slope Item coefficient design method, the value of parameter eigenvalues and the calculation method of anti-skid stability.Through an example of earth-rock dam, this paper studies the anti-skid stability analysis of sub-coefficient design method in China and Europe And compares the safety level of the two specifications with respect to both the safety factor and the failure probability.From the analysis of the examples, it can be seen that the partial factor design method based on the design principle of the probability limit state can take better account of the design parameters .The failure probability of anti-sliding stability of earth-rockfill dams designed by European Code is obviously higher than the failure probability of anti-sliding stability of earth-rockfill dam designed by China.According to the Eurocode 7 recommended Schneider method and the eigenvalue The calculated probability of failure is slightly greater than the probability of failure calculated using the mean of the parameters.