【摘要】 采用FLAC-3D程序,对大跨度公路隧道的开挖全过程进行了三维模拟,给出了隧道开挖不同阶段的围岩应力、变形、塑性区的分布状态,据此对隧道稳定性进行评价。通过开挖过程的三维数值模拟,可了解大跨度隧道围岩应力分布、支护受力状态,剖析施工过程对围岩稳定的影响,从而为合理调整支护参数和措施,提供重要依据和参考。更多还原

【Abstract】 By FLAC-3D, the whole process of excavation of big-span highway tunnel was simulated. Stress, deformation, plastic state of surrounding rocks at various phases were given. Stability of tunnel was evaluated. By the 3D simulation of excavation process, distribution of stresses and support can be known, influence on stability of surrounding rock in construction can be analyzed, and it can provide important references.更多还原