摘要
研究区地质条件复杂,危岩体发育、变形破坏现象显著,开展危岩体防治是一项必要而紧迫的工作。为了给设计部门提供可靠依据,采用基于有限元理论的数值模拟,分析该危岩体整体失稳模式与潜在破坏面。利用运动学模拟软件Rockfall从危岩体落石状态、落石弹射高度、运动能量等方面对危岩体崩塌落石轨迹及其堆积区域进行研究。结果表明,危岩体潜在破坏面自后缘裂缝端部扩展,沿软弱层贯通,最终出现剪切滑移破坏。从坡顶崩落的石块主要堆积区位于距坡肩140-220m的范围。
Perilous rock is developed in the study area due to the complex engineering geological conditions,which has ap-peared significant deformation and failure phenomenon at present.It is necessary and urgent to carry out the prevention and control of perilous rock.To provide a reliable basis for the design department,numerical simulation based on finite element theory was used in this study to analyze the overall instability mode and potential failure plane of the perilous rock.Rockfall,a kinematic simulation software,was used to study the rockfall trajectories and accumulation areas of caving stone from the perspectives of rockfall state,ejection height and movement energy.The results show that the potential damage plane of the perilous rock expands from the end of fissure at the trailing edge,and penetrates along the weak layer to cause shear slip fail ure.The main accumulation area of the rock falling from the slope top is mainly located in the range of 140-220 m.
作者
王晓娟
尹晓萌
李鹏霞
翟诗雨
Wang Xiaojuan;Yin Xiaomeng;Li Pengxia;Zhai Shiyu(Xinyang Normal University,Xinyang 464000,China)
出处
《廊坊师范学院学报（自然科学版）》
2020年第1期86-90,共5页
Journal of Langfang Normal University(Natural Science Edition)
基金
国家自然科学基金项目“水作用下石英云母片岩各向异性响应特征及细观机理研究”(41807240)
大学生科研基金项目“典型变形破坏模式的堆积层滑坡的抗滑桩位置优化”(2019-DXS-039)。
关键词
危岩体
失稳模式
潜在破坏面
落石轨迹
perilous rock
instability mode
potential failure plane
rockfall trajectories
