加筋陡坡临界高度的影响因素敏感性研究

Studies of sensibilities of influence factors on critical height of reinforced steep slope

基于塑性极限分析的上限定理,利用自编程序,分别计算了不同坡脚、顶面倾角、内摩擦角、黏聚力、筋带抗拉强度、加筋间距、格栅布置方式、填土重度、地震烈度、顶部荷载共10种影响因素作用下加筋陡坡的临界极限高度。根据正交分析方法给出了各个因素的敏感性顺序。结果显示,土的内摩擦角和地震作用对陡坡临界高度的影响最为显著,黏聚力敏感性则较缓坡有所下降。因此,对陡坡应重视对土的内摩擦角的选取,并在设计中对地震作用予以重视。

Based on the fundamental theory of upper-bound limit analysis of plasticity,the limit heights and stability coefficients of the reinforced steep slopes with different slope angles,top slope angles,internal friction angles,cohesive,reinforcement tension strengths,reinforced spacing,reinforcement arrangement,unit weights,seismic intensities and additional loads are calculated based on a code written by the authors.The sequence of sensibilities is listed;and the results show that the internal friction angle an...