“5·12”汶川地震诱发滑坡的滑动距离预测

被引:33
作者
李秀珍 [1 ,2 ]
孔纪名 [1 ,2 ]
机构
[1] 中国科学院山地灾害与地表过程重点实验室
[2] 中国科学院成都山地灾害与环境研究所
关键词
“5·12”汶川地震; 地震滑坡; 滑动距离预测; 滑坡体积; 地形地貌;
D O I
10.15961/j.jsuese.2010.05.011
中图分类号
P642.22 [滑坡];
学科分类号
0837 ;
摘要
滑坡体积和地形地貌是影响滑坡滑动距离的两个重要因素。在对"5·12"汶川地震诱发的滑坡进行详细调查的基础上,对46个典型地震滑坡的滑动距离与滑坡体积以及原始斜坡坡角的相关关系进行了统计分析。结果表明,汶川地震滑坡的水平滑动距离、垂直滑动距离均与滑坡体积的对数值具有良好的指数函数增长关系,相关系数R2分别为0.8244和0.7859;等效摩擦系数与原斜坡坡角正切值之间具有良好的线性增长趋势,相关系数R2为0.7973。基于此,通过二元线性回归,获得了滑坡水平滑动距离与滑坡体积、滑坡前后缘高差以及原始斜坡坡角的相关关系。
引用
收藏
页码:243 / 249
页数:7
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