摘要
在研究材料强度对边坡稳定影响机理的基础上,结合简单的均质边坡、非均质边坡算例,分别采用基于强度折减法的Plaxis软件及基于极限平衡法理论的Geo-Studio软件进行计算,采用Mohr-Coulomb弹塑性本构模型,分析各材料参数对安全系数及边坡滑裂面的影响。结果表明:(1)当λcr为定值时,改变黏聚力c及内摩擦角对滑裂面位置没有影响;当λcr由小变大时,滑裂面由浅变深,进出口逐渐远离边坡坡顶和坡底;当λcr由大变小时,滑裂面由深变浅,进出口逐渐靠近边坡坡顶和坡底;(2)安全系数与黏聚力c近似呈线性增大关系,与内摩擦角呈非线性增大关系;(3)安全系数随着坡角或坡高的增大不断减小,但其对滑裂面的影响同结论(1)。
On the base of studying the mechanism of the material strength on slope stability, combining a simple uniform slope and a non-uniform slope study, the plaxis software based on the strength reduction theory and the geo-studio software based on limit equilibrium theory were used for calculation.The material parameters impact on slope safety factor and slip surface was analyzed by using the Mohr-Coulomb constitutive model.The results show that： （1） when λcr is constant, changing cohesion c and internal friction angle（φ） had no effect on the sliding surface;when the λcr changes from small to large, the sliding surface changed from light to dark, and the import and export moved away from the top and base;while when the λcr changes from large to small, the sliding surface changed from dark to light, the import and export moved near the top and base;（2） the safety factor and the cohesion force c were approximately linearly increasing, and the internal friction angle （φ） was nonlinearly increasing;（3） the safety factor decreased with the increase of the slope angle or slope height, but its impact on slip surface was the same as that of conclusion （1）.
出处
《水资源与水工程学报》
CSCD
2017年第4期210-215,共6页
Journal of Water Resources and Water Engineering
关键词
边坡
强度折减法
极限平衡法
滑裂面
安全系数
slope
strength reduction theory
limit equilibrium theory
slip surface
safety factor
