A Full-Scale Model Test for Predicting Collapse Time Using Displacement of Slope Surface During Slope Cutting Work
A Full-Scale Model Test for Predicting Collapse Time Using Displacement of Slope Surface During Slope Cutting Work
复制标题
坡面切削过程中利用坡面位移预测崩塌时间的全尺寸模型试验
DOI：
10.1007/978-3-319-53487-9_12
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
and Satoshi Tamate
中科院分区：
文献类型：
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作者：
Nobutaka Hiraoka;Naotaka Kikkawa;Katsuo Sasahara;Kazuya Itoh;and Satoshi Tamate
在日本，每年约有15-20名工人死于斜坡崩塌或罗克瀑布，因此预测这些崩塌或岩布的发生对于职业安全是很重要的。大约一半的受害者在边坡开挖施工期间遭受边坡破坏。在本研究中，为了预测边坡破坏的时间，在一个足尺模型边坡进行了实验测试，边坡开挖过程中的边坡表面的位移监测。开挖后地表位移随时间迅速增加，在崩塌前地表位移与时间呈指数函数关系。验证了利用边坡位移加速度与速度的关系可以预测边坡失稳的时间。然而，为了预测崩溃的时间，需要在崩溃前2秒计算数据。因此，我们意识到提供咨询和警告信号的重要性，以便让工人有足够的时间逃离斜坡塌方。研究发现，通过计算坡面位移速度的倒数，可以在崩塌前2 min提供咨询和预警信号。
It is important to predict an onset of slope failures or rock falls for the occupational safety because about 15–20 workers were killed by these every year in Japan. Approximately half of the victims suffered from slope failure during slope excavation construction. In this research, in order to predict the time of slope failure during an experimental testing on a full-scale model slope was conducted, and the displacements of the slope surface were monitored during the slope excavation. The surface displacements rapidly increased with the elapsed time after the excavation, and the relationship between the displacements and the elapsed time included an exponential function just before the collapsed. We validated that the time of slope failure could be predicted by the relationship between the acceleration and the velocity of the obtained slope surface displacements. However, in order to predict the time of collapse, the data was required to compute only 2 s before the collapse. Therefore, we realised the importance of providing advisory and warning signal to give workers enough time to escape the slope failures. We have discovered that by computing the inverse of velocity of slope surface displacement, advisory and warning signals can be provided 2 min before the collapse.