摘要
采用延伸的摩尔-库仑破坏准则以考虑基质吸力对岩体抗剪强度的贡献,对地表入渗影响下的岩坡失稳机制进行了探讨。针对裂隙化程度较高或陡倾角裂隙发育的岩坡,运用刚体极限平衡理论,首先,提出了一种考虑地表入渗影响的岩坡稳定性分析方法——改进的不平衡推力传递法;然后,编制了考虑非饱和带基质吸力和暂态附加水荷载等作用的岩坡稳定分析程序;最后,通过算例介绍了上述程序在地表入渗影响下的岩坡稳定性分析中的应用。算例分析表明,分析方法和计算程序是合理可行的,地表入渗的确会显著降低岩坡的稳定安全系数。
An extended Mohr-Coulomb failure criterion is used to allow for shear strength variations as a result of changes of matrix suction. The landslide mechanism of rock slope under the influence of surface infiltration is discussed. By means of the limit equilibrium theory of rigid body, an analysis method on rock slope stability considering surface infiltration, which is called improved non-equilibrium push transmission method, is proposed and a program for checking the stability of rock slope with the function of matrix suction and temporary additional water load considered, is worked out. This program is applied to the analysis on rock slope stability with the presence of surface infiltration. The results show that the analysis method and program in this paper are reasonable and reliable and surface infiltration will bring harmful influence on the stability of rock slope.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第7期1112-1116,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金(59879004)
高等学校博士学科点专项科研基金(98029408)
中国博士后科学基金
