Assessing the internal structure of landslide dams subject to possible piping erosion by means of microtremor chain array and self-potential surveys
Assessing the internal structure of landslide dams subject to possible piping erosion by means of microtremor chain array and self-potential surveys
复制标题
DOI：
10.1016/j.enggeo.2017.12.023
复制
发表时间：
2018-02
影响因子：
7.4
通讯作者：
Fawu Wang;A. C. Okeke;T. Kogure;T. Sakai;H. Hayashi
中科院分区：
文献类型：
--
作者：
Fawu Wang;A. C. Okeke;T. Kogure;T. Sakai;H. Hayashi
一个综合的地球物理方法，包括微动链阵列和自然电位调查被用来评估滑坡坝的内部结构，可能在日本和吉尔吉斯斯坦的选定地点的管涌侵蚀。非侵入式地球物理方法具有成本效益，环境友好和便携式，因此，它已被证明是有价值的滑坡坝的岩土工程评估，管道可能会引发大坝的失败。而脉动链阵列测量结果揭示了滑坡坝的内部结构，自然电位测量结果显示了异常渗流区的路径。在长期存在的滑坡坝的调查网站，在大坝中的渗流路径的存在下，证实了低相速度和大的负自电位异常的区域之间的良好的相关性。总之，这种综合地球物理方法可以用于滑坡坝的早期风险评估和预测滑坡坝的管涌破坏。
An integrated geophysical approach comprising microtremor chain array and self-potential surveys was used to assess the internal structure of landslide dams subject to possible piping erosion in selected sites in Japan and Kyrgyzstan. The non-invasive geophysical approach is cost effective, environmentally friendly and portable, and hence, it has proven to be valuable for the geotechnical assessment of landslide dams where piping can trigger failure of the dam. While the microtremor chain array survey results revealed the internal structure of the landslide dam, the self-potential survey results indicated the path of anomalous seepage zones. In the surveyed sites of long-existing landslide dams, the presence of a seepage path in the dam was confirmed by a good correlation between the areas of low phase velocity and large negative self-potential anomalies. In summary, this integrated geophysical approach could be useful for the early risk assessment of landslide dams and prediction of landslide dam failure by piping.