开挖卸荷下顺层岩质滑坡运动距离理论模型
A Theoretical Model about the Runout Distance of Bedding Rock Landslide under Excavation Uploading
杨亮 1汪洋 1张全 2高峰 1肖兰1
作者信息
- 1. 中国地质大学工程学院,湖北武汉 430074
- 2. 重庆一零七市政建设工程有限公司,重庆 401120
- 折叠
摘要
顺层岩质滑坡在边坡工程中普遍存在,其运动距离不仅是表征滑坡形态的重要参数,也是风险评价的重要指标.基于顺层岩质滑坡演化过程的分析,推导了其运动距离的理论计算公式,并将公式应用于新嘉南滑坡进行验算.结果表明:开挖卸荷下顺层岩质滑坡的运动距离由三部分组成即块体在空中做自由落体产生的水平距离、与地面碰撞的移动距离以及最后在地面的滑动距离,此外,选取的新嘉南滑坡 3个剖面运动距离理论计算值和实际值的相对误差分别为 9.99%、2.53%以及0.58%,误差结果较小,表明公式适用性良好.研究成果对该类型滑坡预测与防治有一定的参考价值.
Abstract
Bedding rock landslide exists widely in slope engineering.Its movement distance is an important parameter to characterize the landslide form and a significant index for risk evaluation.Based on the analysis of the evolution process,the runout distance of the bedding rock landslide is obtained by the theoretical derivation,and the achievements are applied to the Xinjianan landslide.The results showed three parts consisting of movement distance.The horizontal distance of the block in the air is the first,and the mobile distance of the collision with the ground is the next while the sliding distance on the ground is the last.Besides,the relative error between theoretical calculation and the actual measurements selected for the three profiles of the landslide are 9.99%,2.53%,and 0.58%respectively.The error is small and shows the good application of the model.The research has a reference value for predicting and preventing this type of landslide.
关键词
顺层岩质滑坡/开挖卸荷/运动距离/理论模型/工程地质Key words
bedding rock landslide/excavation uploading/runout distance/theoretical model/engineering geology引用本文复制引用
基金项目
青年科学基金(42107160)
中央高校基本科研业务费专项(CUG2642022006)
国家自然科学基金面上项目(42077277)
出版年
2024
NETL
NSTL
万方数据