采用有限元方法探讨在人工开挖或自然侵蚀环境下,岩质边坡体内应力场的变化及节理发育形成机理,并采用有限元强度折减法对后缘具有张节理边坡的稳定性影响因素进行敏感性对比分析,进而得出具有非贯通节理边坡稳定性计算的修正解析解.结果表明:卸荷及风化作用导致边坡体由表及里出现应力重分布及应力集中的现象,使边坡后缘由顶部向下发育一簇竖直向下或略向临空面倾斜的张节理,当张节理与下部的缓倾剪节理贯通时,边坡发生破坏；边坡稳定性最敏感的影响因素为受剪节理的倾角及贯通度,其次是节理的强度参数；可将工程中较难调查的节理贯通度转化为节理的强度参数来等效表达,并根据Mohr-Coulomb强度准则推导得到适用于具有非贯通节理的岩质边坡稳定性的修正解析解.%The changes of stress field and formation mechanism of joint development of rock slope under the condition of man-made or natural environment were studied by finite element method; the sensitivity of factor of slope stability with tension joints was comparatively analyzed by strength reduction finite element method; the analytical solution on stability of non-through joint rock slope was amended. The results showed that the unloading and weathering resulted in stress redistribution and concentration of slope and tension joints development down vertical or tilts to the free face slightly, and the slope would damage when tension joint connected with gently inclined joint; next to the inclination and through degree of shear joint, the most sensitive factors of slope stability were strength parameters of joint; the through degree of joint investigated difficultly could be equivalent replaced by strength parameters of joint, and the analytical solution on stability of non-through joint rock slope was amended according to Mohr-Coulomb strength criterion.
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