反倾层状边坡倾倒变形破坏模式的岩层等厚度特性研究

为检验等厚层状特性这一假定条件在反倾岩质边坡研究中的适用性,以重庆市硝洞槽-郑家大沟反倾层状岩质岸坡为实例进行数值模拟验证。首先建立二维简化工程地质模型;并利用离散元软件(UDEC)对反倾边坡在相邻岩层不同厚度比值(1.0∶0.1)~(1.0∶1.0)条件下分别进行数值模拟计算。然后对比分析不同岩层厚度比值条件下边坡弯曲倾倒变形特征,得出了反倾层状边坡倾倒变形随相邻岩层厚度比值变化规律。最后通过工程实例对研究结做进一步验证。主要得出以下结论:1相邻岩层厚度越相近边坡越易发生弯曲倾倒变形;2仅当相邻岩层厚度比值处于(1.0∶0.8)~(1.0∶1.0)范围内时,反倾边坡才能可视为等厚层状分布。

ANTI-DIP LAYERED SLOPE DEFORMATION AND FAILURE MODE OF FORMATION THICKNESS AND OTHER PROPERTIES

To test this assumption and other thick-bedded characteristic conditions toppling rock slope research applicability to Chongqing Xiaodongcao-Deng anti-dumping layered rock slope of examples and numerical simulation. Firstly, a simplified two-dimensional engineering geological model and using the discrete element software (UDEC) anti-dumping rock slope adjacent different thickness ratio (1.0: 0.1 to 1.0: 1.0) were carried out under conditions of numerical simulation; and comparative analysis of different the thickness ratio of rock slope under conditions of bending deformation characteristics of the dumping, anti - dip layered slope obtained toppling bed thickness ratio variation with neighboring; Finally, an engineering example of research findings further verification. The main draw the following conclusions: (1) the thickness of the adjacent rock slope similar to the more prone to bending deformation dumping; (2) only when the adjacent bed thickness ratio at 1.0: 0.8 to 1.0: 1.0 range when anti-dumping slope It can be regarded as of equal thickness layer distribution.