边坡稳定性影响因素主成份分析  

Principal Component Analysis on Influence Factors of Slope Stability

作　　者：陈高峰[1] 卢应发[1] 程圣国[1] 张红琼[1] 

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室,443002

出　　处：《灾害与防治工程》2007年第2期25-30,共6页Disaster and Control Engineering

摘　　要：以一均质土坡为例,运用正交设计试验方法和主成份分析数值处理方法对边坡稳定性影响因素的主成份分析,克服了传统方法大量试算的困难,考虑了各因素间的交互作用,定量给出了各主成份对边坡稳定性影响的贡献。研究表明,在常见的均质土坡或松散堆积体岩土质边坡中,粘聚力、摩擦角和坡高对边坡稳定性影响的贡献最大;在抗震设防烈度为7度以下的一般岩土体地区,土的重度和地震加速度对边坡稳定性的影响贡献较小。Slope stability is influenced by many factors. Orthogonal Design and Principal Component Analysis are introduced, and these methods are brought in to analyze the sensitivity of influence factors of slope stability. Six influence factors, that is, the density of soil, angle of internal friction, cohesion, angle of slope, height of slope, and acceleration of earthquake respectively are selected as the safety influence factors in the example. The results show that the cohesion, angle of internal friction and height of slope are the most sensitive influencing factors of the six factors above, and the density of soil and acceleration of earthquake are the insensitive influencing factors.

关 键 词：边坡稳定性 影响因素 正交设计 主成份分析 

分 类 号：TU457[建筑科学—岩土工程]