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摘要: 大柳树坝址区存在大面积、大范围的岩体松动破坏现象。为进一步研究其松动破坏的成因机制,在详细调查区域地质背景条件及区域地震动力作用基础之上,提出了地震动力作用与岩体松动现象的内在联系,并通过动力模拟试验和动力数值分析,进一步证明岩体松动破坏现象与历史上该地区发生的强烈地震具有密切关系。因此,在目前的工程地质条件下,一旦发生较大强度的地震活动,坝址区所遭受的破坏程度会更大,对拟建的水利工程设施将产生严重威胁。Abstract: There is a large scale of dynam-relaxed rock mass lies in Daliushu dam site. In order to study the destructive mechanism of the rock mass, geological background conditions and earthquake dynamic effects of the region round Daliushu dam site are investigated. The internal relations between earthquake dynamic effects and dynam-relaxed rock mass are confirmed. A further research to the conclusion is given by the dynamic simulation test and dynamic numerical analysis. Consequently once a more serious earthquake happened at present engineering geological conditions, the rock mass of dam site would be further destroyed. That would be threatening to the new constructed water conservancy at Daliushu dam site of Yellow River.
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