摘要
将强度折减法基本理论与弹塑性有限元相结合,以有限元计算收敛条件作为边坡失稳评判指标,分析某高速公路的边坡土体剪胀角对边坡稳定性的影响。计算结果表明:随着剪胀角的增长,边坡稳定安全系数逐渐增长,当土体剪胀角从0°增长到15°时,边坡的稳定安全系数增长了11%;边坡最终破坏的塑性区域随着土体剪胀角的增长而逐渐较小,这表明土体剪胀角对边坡稳定性有着显著的影响。
The strength reduction technique has been commonly incorporated into the elastro-pal- stic FEM. The non-convergence state of finite element analysis is considered as the evaluation criteria of unstable condition of slope. The influence of dilatancy angle on the slope stability of the expressway is analyzed. The results show that： the dilataney angle has the most obvious effect on the safety factor of slope stability; while the dilatancy angle increases from 0°to 15°, safety factor of slope stability can be increased by 11%. The plastic zone is decreased when the dilatancy angle is increased. According, the dilatancy angel has certain influence on the slop stability.
出处
《公路工程》
北大核心
2014年第3期116-119,共4页
Highway Engineering
关键词
剪胀角
强度折减法
边坡稳定性
有限元
dilatancy angle
strength reduction technique
slope stability
finite element method
