金沙江上游某库区滑坡稳定性分析及滑速涌浪预测.docx
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摘要
本文针对金沙江上游某库区滑坡，从滑坡稳定性、滑坡运动规律和滑坡诱发涌浪灾害 3 个方面评估
了滑坡的整体和局部稳定性，模拟了滑坡启动后的动力学过程，探讨了滑坡入水产生的涌浪对大坝
的影响。滑坡在天然水位工况下基本稳定，在正常蓄水位工况下失稳滑动的可能性大，进一步建立
了水库蓄水后滑坡的 2 种失稳模式：Ⅱ区整体滑动和Ⅱ区中下部滑动。在稳定性分析的基础上，采
用潘家铮滑速计算方法，定量计算了滑坡从启动到停止的全过程，获得了各工况失稳滑动的滑速时
程曲线和滑坡堆积形态。最后采用经验公式，对滑坡涌浪进行了预测。计算结果表明：水库蓄水后，
各工况失稳滑动的滑速和滑距均较小，滑坡高速远程滑动的可能性小；滑坡产生的涌浪不会漫过坝
顶，涌浪对大坝的影响小。
Abstract
Based on a reservoir landslide in the upper reaches of Jinsha River, the landslide
overall and local stabilities are analyzed, the dynamic process after landslide start-
up is simulated, and the impact of landslide surge on the dam is discussed from
three aspects of landslide stability, landslide movement law and landslide induced
surge disaster in this paper. The landslide is basically stable under the natural water
level condition, but it is likely to slip under the normal water level condition. Two
landslide failure modes after reservoir impoundment are further established: the
whole sliding of zone Ⅱ and the middle and lower sliding of zone Ⅱ. On the basis
of stability analysis, the whole process of landslide from initiation to deposition is
quantitatively calculated by using Pan Jiazheng's method, and the sliding velocity
time history curve and accumulation form of the landslide are obtained. Finally, the
landslide surge is predicted by empirical formula. The calculation results show that
the slip velocity and slip distance of the landslide under various failure modes are
small, and the possibility of high-speed and long-distance landslide is small after
reservoir impoundment. The surge generated by landslide cannot overflow the dam
crest, and the impact of landslide surge on the dam is small.
译
关键词
滑坡稳定性分析; 失稳模式; 运动规律; 堆积形态; 滑坡涌浪
Keywords
landslide stability analysis; failure mode; movement law; accumulation
form; landslide surge
译
西南地区河流落差大，水能资源丰富，是我国水电能源开发的基地，但该地区山高谷深，地质条件
复杂，地质灾害频发。
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