基于可靠度理论对滑移式落石的稳定性及敏感性分析
发布时间：2018-11-20 19:20
【摘要】：汶川地震引发了大量的地质灾害,其中坡表停留孤石的判定及治理成为了灾害重建的难题。针对偏心滑落式孤石的稳定性极限特征,用可靠度理论,建立其可靠度判定极限状态方程;并根据现场量测及概率统计方法,对函数中孤石处的坡脚α、孤石的内摩擦角φ、单位长度危岩体重力G、孤石黏聚力c、孤石高度h等基本变量的均值、变异性系数及分布特征进行确定。基于以上研究成果,建立了偏心滑移式孤石稳定性可靠度指标计算方法;同时对各基本变量的可靠度敏感性进行研究。研究结果表明:孤石的倾角的可靠度敏感性最高,其次是孤石的单位长度重量、内摩擦角和黏聚力指标;而孤石的高度对其没有影响。
[Abstract]:Wenchuan earthquake caused a large number of geological disasters. According to the stability limit characteristics of eccentric sliding solitary stone, the limit state equation of reliability determination is established by using reliability theory. According to the field measurement and probability statistical method, the mean values of the basic variables, such as slope foot 伪, internal friction angle 蠁, body weight force G per unit length, cohesion force c and height h of the solitary stone, are obtained in the function, such as the slope foot 伪, the internal friction angle 蠁 of the solitary stone, the weight force of the dangerous rock per unit length. The coefficient of variability and the distribution characteristics were determined. Based on the above research results, a calculation method of stability reliability index of eccentric slip solitary stone is established, and the reliability sensitivity of each basic variable is studied. The results show that the reliability sensitivity of the inclination angle is the highest, followed by the unit length weight, internal friction angle and cohesion index, but the height of the solitary stone has no effect on it.
【作者单位】： 成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：四川省科技创新团队项目(2011JTD012) 交通运输部建设科技项目“四川藏区高海拔高烈度条件下公路建设减灾关键技术研究”(2013318800020)资助
【分类号】：TU45;P642.2
本文编号：2345754
[Abstract]:Wenchuan earthquake caused a large number of geological disasters. According to the stability limit characteristics of eccentric sliding solitary stone, the limit state equation of reliability determination is established by using reliability theory. According to the field measurement and probability statistical method, the mean values of the basic variables, such as slope foot 伪, internal friction angle 蠁, body weight force G per unit length, cohesion force c and height h of the solitary stone, are obtained in the function, such as the slope foot 伪, the internal friction angle 蠁 of the solitary stone, the weight force of the dangerous rock per unit length. The coefficient of variability and the distribution characteristics were determined. Based on the above research results, a calculation method of stability reliability index of eccentric slip solitary stone is established, and the reliability sensitivity of each basic variable is studied. The results show that the reliability sensitivity of the inclination angle is the highest, followed by the unit length weight, internal friction angle and cohesion index, but the height of the solitary stone has no effect on it.
【作者单位】： 成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：四川省科技创新团队项目(2011JTD012) 交通运输部建设科技项目“四川藏区高海拔高烈度条件下公路建设减灾关键技术研究”(2013318800020)资助
【分类号】：TU45;P642.2
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