散粒体路堤包边技术稳定性研究  

Study on the Stability of Granular Wrapping Embankment

作　　者：陆泽峰[1] 

机构地区：[1]江苏省有色金属华东地质勘查局,南京210007

出　　处：《河南科学》2015年第5期758-761,共4页Henan Science

摘　　要：散粒体材料具有抗压缩能力强的优点,被应用于路堤填筑中.但由于其黏聚力较小,常需要采用黏性土包边的方法进行边坡处理.影响散粒体包边路堤稳定性的影响因素很多,因此,合理选择包边土参数显得十分重要.本文采用Janbu条分法,并结合最优滑动面概率统计方法,分析了路堤的高度、坡比,包边土厚度、黏聚力、摩擦角对于散粒体包边路堤稳定性的影响.分析结果表明:散粒体包边路堤稳定性随着包边土厚度、黏聚力和摩擦角的增加而增大;在同等包边条件下,路堤高度和坡比的增加会降低包边路堤的整体稳定性;用掺灰手段改良包边土参数能有效增加散粒体包边路堤的稳定性.The granular material is always used in embankment filling according to its high compression modulus. Due to the small cohesive force,the granular embankment needs to be wrapped by clay soil generally. There exist many influence factors of the wrapping embankment stability and the reasonable selection of wrapping soil parameters is important. In this paper,Janbu slices method combing optimal sliding surface probability statistical method is used to analyze the influence of embankment height,slope ratio,thickness,cohesive force and friction angle of wrapping soil on the wrapping embankment stability. The analysis results show as follows. The wrapping embankment stability increases with the increasing of wrapping soil’s thickness,cohesive force and friction angle;Under the same wrapping condition,the wrapping embankment stability decreases with the increasing of embankment height and slope ratio;Improving the mechanical parameters of wrapping soil by mixed with fly ash is the effective method to increase stability of wrapping embankment.

关 键 词：散粒体 包边 稳定性 

分 类 号：TU521.1[建筑科学—建筑技术科学]