节理岩质边坡稳定性的离散元分析

Stability Analysis of Jointed Rock Slope by Discrete Element Method

岩体中大量节理的存在导致其具有明显不同于完整岩体的力学性质,进而大大加大了其力学计算的复杂性。在对二维离散元法的计算原理进行讨论的基础上,利用二维离散元程序对一岩质边坡在自然和地震两种工况下的稳定性进行了计算分析,并对地震工况下的计算原理进行了详细分析,分别得到其安全系数为2.0和1.67,即边坡是稳定的。同时也说明二维离散元非常适合于计算节理岩质边坡的稳定性。

The existence of a large number of joints in rockmass can lead to mechanical properties that are obviously diffetent than those of an integral rockmass, greatly increasing the complexity of its mechanical calculation. Based on the discussion on the calculation principle of two-dimensional discrete element method, the corresponding program is adopted to calculate the stability of the rocky slope under natural and seismic conditions respectively and a detailed analysis is made of the calculation principle for the seismic condition. The safety coefficients under the two conditions are calculated to be 2.0 and 1.67 respectively,illustrating that the slope is stable. Meanwhile, it is shown that two-dimensional element method is very suitable for the stability calculation of jointed rocky slope.