论文部分内容阅读
本文应用概率论和数理统计理论,探讨了裂隙岩体抗滑稳定分析方法。根据裂隙产状服从半球法线分布的假设,求得裂隙组集中产状的均值、方差和均值的可信区间。根据剪断试验资料,尝试用两点法确定抗剪参数的分布。采用极限平衡理论,应用蒙特卡洛法,计算坝肩岩体中可能滑动的块体的安全特征β和块体的稳定安全可靠度Pr,以此来评价该块体的稳定性。为了研究单个参数对稳定性的影响,在稳定性可靠度分析的程序中考虑了参数的灵敏度分析。最后给出了块体失稳的破坏概率Pf和安全系统Kc之间的关系,以便与常规的确定性分析加以比较。
In this paper, the theory of probability theory and mathematical statistics are used to discuss the anti-sliding stability analysis method for fractured rock mass. According to the hypothesis that the fissure appearance obeys the normal distribution of the hemisphere, the confidence intervals for the mean, variance, and mean of the fissure group focus are obtained. Based on the shear test data, try to determine the distribution of shear parameters using the two-point method. Using the theory of limit equilibrium, the Monte Carlo method was used to calculate the safety feature β of the possible sliding mass in the abutment rock mass and the stability and reliability Pr of the mass, so as to evaluate the stability of the block. In order to study the influence of individual parameters on the stability, sensitivity analysis of the parameters was considered in the stability reliability analysis program. Finally, the relationship between the failure probability Pf of the block instability and the safety system Kc is given in order to compare with the conventional deterministic analysis.