复式结构特高面板堆石坝安全性论证  

Safety Demonstration of Compound Structure Extra-high Face Rockfill Dam

作　　者：周恒[1] 刘静[1] 陆希[1] ZHOU Heng;LIU Jing;LU Xi(PowerChina Northwest Engineering Corporation Limited,Xi'an 710065,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《水电能源科学》2022年第3期87-90,共4页Water Resources and Power

基　　金：国家重点研发计划(2017YFC0404805)。

摘　　要：混凝土重力坝-堆石坝复式结构,在坝踵增设混凝土坝(墙),既减短了混凝土面板长度,又提高坝体底部的可维修性,大石峡水电站拟采用此复式结构面板坝体型。以大石峡面板坝为工程依托,采用三维有限元数值模拟方法,对此复式结构体型应用于特高面板堆石坝的安全性进行论证,研究了该结构的正常使用受力状态和抗震稳定性。结果表明,坝体应力变形规律符合百米级面板坝的变形量级,未出现不协调变形和剪切破坏现象;重力坝应力均在材料强度范围以内,且符合坝体受力的一般规律;面板应力、变形、周边缝、面板垂直缝等均在工程合理范围之内。特高面板堆石坝复式结构在正常使用和地震情况下均是安全稳定的。The concrete gravity dam-rockfill dam compound structure, in which a concrete dam(wall) is added at the dam heel, not only reduces the length of the concrete slab, but also improves the maintainability of the bottom of the dam, is proposed to be adopted in Dashixia Hydropower Station. Taking the Dashixia face rockfill dam as example, this paper demonstrates the safety of the compound structure in the application of the extra high face rockfill dam by using the three-dimensional finite element numerical simulation method, and studies the normal service state and seismic stability of this structure. The results show that the stress and deformation law of the dam conforms to the order of deformation of the 100-meter level face slab dam, and there is no uncoordinated deformation and shear failure phenomenon. The stress of gravity dam is within the range of material strength and conforms to the general law of dam body. The panel stress, deformation, peripheral joints and vertical joints of the panel are all within the reasonable range of engineering. The compound structure of extra-high face rockfill dam is safe and stable under conditions of normal use and earthquake.

关 键 词：特高面板坝 复式结构 结构安全性 抗震稳定性 

分 类 号：TV641[水利工程—水利水电工程]