武罐高速公路崔家梁黄土滑坡形成机理与稳定性分析  

Formation mechanism and stability analysis of Cuijialiang loess landslide on Wudu-Guanzigou expressway

作　　者：吴道勇[1,2] 吴红刚 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]中铁西北科学研究院有限公司,甘肃兰州730000

出　　处：《铁道建筑》2012年第8期88-92,共5页Railway Engineering

基　　金：甘肃省交通建设科研项目(200813)

摘　　要：武罐高速公路武都至洛塘段黄土滑坡分布密集,由于该地区黄土厚度较小,滑坡以浅～中层的中小型滑坡为主,研究认为该地区黄土滑坡的发生主要受降雨、地震和河流的影响,使滑坡表现出明显的周期性。以线路中比较典型的崔家梁黄土滑坡为研究对象,突出坡体结构在滑坡稳定性分析与计算中的重要作用,从滑坡地质结构与变形特征入手,建立滑坡坡体结构,分析滑坡形成机理和可能产生的失稳破坏模式,并进行稳定性分析与评价,确定滑坡变形状态。计算结果表明,崔家梁滑坡在天然状态时已接近极限平衡状态,在降雨或发生地震时稳定性将进一步降低从而可能产生整体滑动,为选择滑坡防治措施提供依据。Due to the less thickness of loess and primary small and medium-sized landslides with shallow- middle layer in this region, there are intensive loess landslides distribution in the line of Wudu to Luotang on Wu-Guan expressway. At present,the loess landslides in this area have not attracted enough attention and recent studies suggest that the loess landslides in this region are mainly influenced by the rain, earthquake and river scour, the interaction of which make the landslide represent obvious cyclicity. Taking Cuijialiang loess landslide which is comparatively typical in the line as the research object, this paper highlighted the importance of slope structures in landslide stability analysis and calculation, established slope structures of the landslide by discussing the geological structure and the deformation characteristics, analyzed the landslide formation mechanism and its probable instability and failure mode, conducted stability analysis and evaluation, and determined the landslide deformation state. The calculation results showed that Cuijialiang landslide has already close to the limit equilibrium state in natural condition and the stability of the landslide will be further reduced and result in overall sliding when the earthquake or rainfall happens. The method introduced in this paper can provide basic information for the landslide orevention and control.

关 键 词：公路 黄土滑坡 坡体结构 形成机理 稳定性分析 

分 类 号：U416.163[交通运输工程—道路与铁道工程]