【摘要】 在隧道和地下工程弹性问题的位移反分析中,当基本未知数多于三个时,在各参数可能的变化范围内找到一组使误差最小的最佳参数的优化反分析方法是当前岩土工程反分析研究的热点问题。论文结合一种新型的优化算法(差异进化算法),依托摩天岭1#斜井隧道工程施工,跟踪施工进行了典型断面围岩位移监测,以现场量测位移作为基础信息求得了斜井隧道全局最优值的最佳力学参数组合。根据以上采用差异进化算法求得的反演参数,对摩天岭1#斜井隧道单层衬砌支护稳定性进行了三维数值模拟分析,分析表明,摩天岭1#斜井隧道III级围岩段喷15 cm厚钢纤维混凝土支护后,斜井隧道围岩最小应力明显降低,围岩位移明显减小,因此建议摩天岭1#斜井洞身段III级采用15 cm厚度的钢纤维喷射混凝土单层衬砌。以上研究直接指导了摩天岭隧道单层衬砌设计和施工。更多还原

【Abstract】 In the tunnel and underground engineering elastic displacement back analysis calculations,it is the current hot point to find out the optimized parameters group that makes minimal error within the possible range of each parameter when the basic unknown parameters are more than three.The paper relying on the tunnel construction of Motianling 1# inclined shaft,monitored surrounding rock displacements of a typical section in construction process and applied a new optimization algorithm(differential evolution algorithm) to obtained the best combination of mechanical parameters of surrounding rock.According to above parameters obtained by differential evolution algorithm,we carried out numerical simulation analysis of the stability of single shell lining of Motianling 1# inclined tunnel by using 3D geotechnical engineering software,which can provide necessary guidance for the construction and design of tunnel.更多还原