摘要
为深入理解陡倾顺层岩质滑坡的变形破坏机制,开展底摩擦试验,借助PIV系统刻画陡倾顺层岩质滑坡变形破坏过程中的非均质特性;基于试验及理论推导,建立考虑滑坡时空非均质变形破坏特性的力学模型并进行数值计算与对比。研究结果表明:相较于传统模型,滑坡时空非均质力学模型在模拟陡倾顺层岩质滑坡层间错动、层面张裂与整体破坏3阶段变形破坏特征方面更为准确,其层间破坏区分布、加速变形特征与试验结果更为吻合,印证滑坡变形破坏的时空非均质特性是促使陡倾顺层岩质边坡滑坡发生的内在机制。研究结果可为陡倾顺层岩质滑坡的变形破坏机制研究提供理论支撑。
In order to deeply understand the deformation and failure mechanism of steeply dipping bedded rock landslide,the bottom friction test was conducted,and the heterogeneity during the deformation and failure process of steeply dipping bedded rock landslide was characterized employing the PIV system.Based on the experimental observation and theoretical derivation,a mechanical model was established considering the spatiotemporal heterogeneous deformation and failure characteristics of landslide,and the numerical calculation and comparison were performed.The results show that compared with the traditional model,the spatiotemporal heterogeneous mechanical model is more accurate in simulating the deformation and failure features during three stages of steeply dipping bedded rock landslide:interlayer slipping,bedding fracturing,and overall failure.The distribution of interlayer damage zones and the accelerated deformation characteristics are more consistent with experimental results,which confirms that the spatiotemporal heterogeneity of landslide deformation and failure is the internal mechanism driving the occurrence of steeply dipping bedded rock landslide.The research results can provide theoretical support for the research on deformation and failure mechanism of steeply dipping bedded rock landslide.
作者
文代颖
陈国庆
孙祥
帅文杰
王立娟
WEN Daiying;CHEN Guoqing;SUN Xiang;SHUAI Wenjie;WANG Lijuan(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu Sichuan 610059,China;Sichuan Academy of Safety Science and Technology,Chengdu Sichuan 610045,China)
出处
《中国安全生产科学技术》
北大核心
2025年第3期141-147,共7页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(42372326)
四川省科技计划项目(2024YFFK0416)。
关键词
陡倾顺层滑坡
物理模型试验
时空非均质特性
力学模型
变形破坏机制
steeply dipping bedded landslide
physical model test
spatiotemporal heterogeneity
mechanical model
deformation and failure mechanism
