Journal
ENGINEERING GEOLOGY
Volume 194, Issue -, Pages 25-37Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.enggeo.2014.10.009
Keywords
Landslide dam; Shaking table test; Aftershock; Overtopping; Risk analysis; Mitigation measures
Funding
- National Natural Science Foundation of China [41372272, 41402257]
- Shanghai Pujiang Program [14PJ1408200]
- Program for Young Excellent Talents in Tongji University
Ask authors/readers for more resources
The Ms 8.0 Wenchuan earthquake triggered at least 257 landslide dams. More than 300 aftershocks with the magnitudes higher than Ms 4.0 occurred after the formation of these landslide dams, which might largely influence the structure and soil properties of these dams. This paper aims to comprehensively investigate the characteristics of the landslide dams induced by the 2008 Wenchuan earthquake, and study the dynamic behaviors of the landslide dams under aftershocks using large-scale shake table tests. First, the characteristics of the landslide dams, including the distribution, geometric parameters, stability and longevity, mitigation measures and the influence of the aftershocks are proposed. Then, two groups of shaldng table tests to simulate the dynamic behaviors of two types of landslide dams under aftershocks are illustrated: one with quartz sand contained 10% kaolin (Dam I) and the other with quartz sands all (Dam II). Finally, the results of the tests, including the acceleration distribution, dam deformation and dam breaching process, are discussed. Through this study, it is found that the landslide dams caused by high-magnitude earthquakes have distinctive characteristics, which may largely influence the stability, breach process and risks of these dams. In the model tests, the accelerations are generally higher on the surface of the dams, either on the crest or on the both upstream and downstream slopes. The Dam I was prone to settlement and cracking. The aftershocks may not directly trigger the failures of landslide dams, but accelerate the overtopping failures by lowering the dam crest with settlement and cracking. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available