目前对Hardfill坝的研究中较少涉及到大坝破坏模式与设计准则的探讨.为此,运用不同的结构破坏分析方法,基于弹塑性有限元对典型Hardfill坝进行了计算分析,对比各种方法所揭示的大坝破坏过程与破坏机理.研究结果表明,不同分析方法得到的大坝破坏破过程、破坏形态以及安全度数值都有一定的不同,但各种方法都揭示了Hardfill坝的坝基面、坝体填筑层面以及坝趾部位是大坝结构的薄弱环节,大坝最终都发生了沿坝基面或者层面的整体失稳破坏模式.经比较,强度储备法与以强度储备为主的综合法比较适合用于Hardfill坝破坏模式分析.%Few studies are referred to Hardfill dam's failure modes and structural design criteria at present. Based on elasto-plastic FEM, the failure modes of a typical Hardfill dam is explored with different structural failure analysis methods, and the failure processes and mechanisms are compared. The results show that there are some differences on the failure processes, failure characters and safety values of dam when by different analysis methods, but the interface of dam and foundation, the construction joint surfaces and the dam toe turn to be the weak points of dam structure through all the methods, and finally, the dam will slide along dam base interface or construction joint surfaces. The strength reserve method and the synthetic method based on strength reserve are suitable to analyze the failure modes of Hardfill dam.
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