摘要
【目的】研究西藏高海拔地区岩质滑坡的主要失稳机理。【方法】以数学方程中可靠度理论为基础,根据岩质滑坡圆弧滑动稳定性极限特征,结合现场大量试验及数学概率统计,建立其可靠度判定极限状态方程。【结果】研究结果表明:公式中坡度α、坡高H、单位长度滑体的重力W、岩石的黏聚力c、岩石的内摩擦角φ等物理力学参数的均值与变异性系数、可靠度指标存在一定影响规律,并以此建立了岩质滑坡可靠度分析计算模型。【结论】通过各物理力学参数的可靠度敏感性计算分析可知,岩质滑坡的坡度敏感性最高,其次是滑坡的单位长度重力、内摩擦角和黏聚力指标;对于滑坡坡高没有表现出明显的影响规律。
[Purposes]This papers aims to study the main instability mechanisms of rock landslides in high-altitude areas of Tibet.[Methods]Based on the reliability theory in the mathematical equation,ac-cording to the limit characteristics of the circular sliding stability of the rock landslide,and combined with a large number of field tests and mathematical probability statistics,the reliability determination limit state equation is established.[Findings]The research results indicate there is a certain influence law between the variability coefficient as well as reliability indicators and mean value of physical and me-chanical parameters such as slopeα,slope height H,gravity per unit length of sliding mass W,rock cohe-sion C,and internal friction angleφin the formula have certain influence rules.Based on this,a reliabil-ity analysis and calculation model for rock landslides was established.[Conclusions]By calculating the re-liability sensitivity of various physical and mechanical parameters,it can be concluded that the inclination angle sensitivity of rock landslides is the highest,followed by the unit length weight,internal friction angle,and cohesion index of landslides;there is no obvious impact pattern on the height of the landslide slope.
作者
杨智翔
赵海阔
黄润秋
裴向军
YANG Zhixiang;ZHAO Hankuo;HUANG Runqiu;PEI Xiangjun(Henan Industrial Design&Research Institute Group Co.,Ltd.,Zhengzhou 451450,China;China Water Northeast Survey,Design and Research Co.,Ltd.,Changchun 130021,China;Chengdu Uni-versity of Technology State Key Laboratory of Geological Disaster Prevention and Geological Environmental Protection,Chengdu 610059,China)
出处
《河南科技》
2024年第15期37-41,共5页
Henan Science and Technology
基金
西藏“十三五”规划水利重点工程项目(34113632)。
关键词
西藏地区
岩质滑坡
可靠度指标
概率统计
敏感性
Tibet region
rock landslide
reliability indicators
probability statistics
sensitivity
作者简介
杨智翔(1993-),男,硕士,工程师,研究方向:岩土工程。
