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采用数值分析法对某高边坡开挖后的位移、应力和塑性区做了分析,指出了需要重点加固的部位。并用有限差分强度折减法对边坡的整体安全系数进行了分析,通过破坏接近度的计算对边坡非破坏区的危险程度和破坏区的破坏程度进行了评价。结果表明:采用两种方法对边坡开挖稳定性进行综合评价,既能正确定量地评价围岩内各区域岩体的稳定程度,又能给出破坏区、损伤区和扰动区的位置和范围,及滑动面的位置,并能描述岩体稳定性状态随开挖过程的演化规律,对边坡的开挖稳定性具有指导意义。
The numerical analysis is used to analyze the displacement, stress and plastic zone after excavation of a high slope, and the points that need to be reinforced are pointed out. The overall safety factor of the slope is analyzed by finite difference strength reduction method. The degree of damage of the non-destructive area and the damage extent of the destructive area are evaluated by the calculation of destructive proximity. The results show that the two methods are used to evaluate the stability of slope excavation, which not only can correctly and quantitatively evaluate the stability of rock mass in each area, but also give the location of damage area, damage area and disturbance area Range and sliding surface position, and can describe the stability of rock mass with the evolution of the excavation process, which is instructive for the stability of slope excavation.