水利学报Issue(12)：1442-1449,8.DOI:10.13243/j.cnki.slxb.2014.12.007
考虑裂隙分布及强度的膨胀土边坡稳定性分析
Stability analysis considering fracture distribution and strength for expansive soil slope
摘要
Abstract
To complement the limitations of existing stability analysis method for expansive soil slope with generalized soil structure, especially fracture surface and weak interlayer, a new geological model of expan⁃sive soil slope with fractures has been established, which takes the slope as a combination of homogeneous soil filling with cracks and tension cracks, fitting the spatial information such as height, angle, thickness and length of typical controlling fracture of site survey into the slope model, and meanwhile, considering the strength parameters of the fracture surface. Based on the equilibrium methods, such as Janbu, Spencer and Morgenstern in the Slide program, which meet the equilibrium among the forces and moment of slices and are suitable for the broken line sliding surface,a typical landslide on the South-to-North Water Trans⁃fer Project is taken as an example for analyzing the stability and features of the expansive soil slope with fractures. The results show that with the model closer to the real slope conditions, the stability of the slope is also getting closer to the engineering practice. After considering the vertical fracture from surface, groundwater and gentle-dipping fracture at toe of the slope, safety factor falls significantly, and sliding sur⁃face, which made of vertical crack at slope top and slip surface developed from the bottom of the vertical cracks to the slope foot, assumes broken line form and its failure characteristics is basically the same as that of actual landslide.关键词
膨胀土/边坡/裂隙面/稳定性分析/滑动面Key words
expansive soil/slope/fracture/stability analysis/sliding surface分类
建筑与水利引用本文复制引用
陈善雄,戴张俊,陆定杰,罗红明,李扬帆..考虑裂隙分布及强度的膨胀土边坡稳定性分析[J].水利学报,2014,(12):1442-1449,8.基金项目
“十二五”国家科技支撑计划项目课题 （）
