Geotechnical investigations of an earthquake that triggered disastrous landslides in eastern Canada about 1020 cal BP
Geotechnical investigations of an earthquake that triggered disastrous landslides in eastern Canada about 1020 cal BP
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对大约 1020 cal BP 在加拿大东部引发灾难性山体滑坡的地震进行岩土工程调查
DOI：
10.1186/s40677-020-00157-9
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发表时间：
2020
影响因子：
4.8
通讯作者：
Baolin Wang
中科院分区：
文献类型：
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作者：
Baolin Wang
岩土工程研究是为了调查加拿大东部史前地震的位置和震级。以前的研究确定了12个敏感的粘土滑坡约1020卡BP在渥太华-加蒂诺地区，其中包括在加拿大东部最灾难性的边坡失稳之一。据推测，山体滑坡是由地震引发的。在目前的研究中，其中三个滑坡进行了调查，以了解其故障机制。研究地点形成一个三角形，横向距离约为38、38和35公里。为收集岩土工程数据，进行了微地震勘测、锥形应变计测试、十字板剪切测试、土壤取样和实验室测试。边坡稳定性模型的构建，以计算临界地面加速度所需的触发滑坡。地面加速度与地面运动预测方程用于三角形地震。结果表明，在魁北克的Eardley附近发生了一次最小矩震级为5.9的地震。
Geotechnical studies are carried out to investigate the location and magnitude of a prehistoric earthquake in eastern Canada. Previous studies identified 12 sensitive clay landslides of about 1020 cal BP in the Ottawa-Gatineau region, including one of the most disastrous slope failures in eastern Canada. The landslides were hypothesized to have been triggered by an earthquake. In the current study, three of those landslides are investigated to understand their failure mechanisms. The study sites form a triangle of lateral distances of about 38, 38 and 35 km. Micro-seismic surveys, cone penetrometer tests, vane shear tests, soil sampling and laboratory testing are conducted to collect geotechnical data. Slope stability models are constructed to calculate threshold ground accelerations required to trigger the landslides. The ground accelerations are used with Ground-Motion Prediction Equations to triangulate the earthquake. The results indicate an earthquake of a minimum moment magnitude of 5.9 near Eardley, Quebec.