摘要
金沙江某坝址左坝肩发育一大型地质异常体,厚度大,主要由碎裂岩体及表部黏土、碎块石组成,对该地质体的认识经历了岩质斜坡断层破碎带的争论岩体卸荷倾倒变形体滑坡认定的渐进过程,其认识过程实际上也是勘察工作逐渐深入的过程。经研究得出:该滑坡体积约8 000×104m3,为岩质切层滑坡,形成于晚更新世,前缘被金沙江河床深厚覆盖层压覆,整体稳定性较好,但对坝址枢纽工程的布置影响较大。
There exists a large-scale geological anomaly with a huge thickness on the left abutment of some dam on Jinsha Rive, which is composed of cracked rockmass, clay on its surface and broken stones. For understanding the essence of the geological phenomenon, a gradual recognition process is as follows ： a rocky slope→a fault broken rock belt→a toppling deformation rockmass as unloading→a landslide body. The landslide is regarded as the final recognition. It belongs to the rock-cut landslide, formed in the late Pleistocene. Its volume is about 8 000 ×10^4 cu-bic meters. Its front is covered by a deep laminated overburden of Jinsha River bed, its integral stability is good, but the impact of its existence on dam site arrangement of the dam is rather great.
出处
《长江科学院院报》
CSCD
北大核心
2010年第8期50-53,57,共5页
Journal of Changjiang River Scientific Research Institute
关键词
地质异常体
坝体稳定性
滑坡
geological anomaly
dam stability
landslide
