金沙江上游某库区滑坡稳定性分析及滑速涌浪预测

来源 :武汉大学学报(工学版) | 被引量 : 0次 | 上传用户:mingtiandetianming
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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.
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