摘要
以西北地区某高陡砂岩互层边坡为背景,基于连续介质力学离散元法数值计算软件CDEM建立了泥砂岩互层边坡崩塌分析模型,探讨了泥岩节理发育程度对该边坡崩塌稳定性的影响性。研究发现:采用摩尔—库伦(Mohr-Coulomb)遍布节理弹塑性材料能够真实的模拟崩塌病害的发生过程,计算结果接近于病害发生路段的实际情况;泥岩在干湿循环作用下,产生崩解现象并导致的裂隙发育;提高泥岩节理黏聚力和内摩擦角可明显减少塌方量,黏聚力0.06MPa或内摩擦角20°时塌方量变化明显。
Based on the numerical simulation software CDEM, a numerical simulation software of Continuum-based Discrete Element Method, the analysis model for the collapse of an interbedded mudstone and sandstone slope was established. The influence of the degree of joint development on the collapse stability of the slope was discussed. The process of collapse disease can be simulated well by using the Mohr-Coulomb joint elastoplastic material, the calculation results were closer to the actual situation. Under drying-watering cycles,disintegration and fissures would develop in mudstone. The amount of collapse can be significantly reduced by increasing the cohesion and internal friction angle of mudstone. The changes of collapse amount are obvious when the cohesion is 0.06 MPa or the internal friction angle is 20°.
引文
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