东义水电站水牙堆积体特性及成因机理研究

Research on characteristics and genesis mechanism of Shuiya accumulation body at Dongyi Hydropower Station

对在重力和降雨作用下形成的复合堆积体的特性及成因机理,以东义河水牙堆积体现有的地质勘察资料为基础,对其特性和形成机理进行了分析研究。研究认为:水牙堆积体下部存在一定厚度且范围很大的洪积扇,覆盖于原来洪积扇剖面之上的碎石土堆积层为水牙滑坡体的滑坡舌堆积,此堆积体滑坡为岩质滑坡,并且由一区牵引着二区发生变形破坏。研究结果可为该类堆积体的防治提供技术参考。

To research the characteristics and genesis mechanism of composite accumulation body formed by the effect of gravi- ty and rainfall, the relative analysis and research are conducted based on the existing geological investigation data of Shuiya accu- mulation body at Dongyi River. The results show that a large proluvial fan is existed with certain thickness under the Shuiya accu- mulation body. The rubble soil accumulation layer that covered on the original section of the proluvial fan is the landslide tongues of Shuiya landslide. Moreover, the Shuiya accumulation landslide is a rock landslide, whose deformation is caused by first zone dragging the second zone. The results can be the technical support of the prevention of accumulation body.