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隧道塌方是隧道修建过程中最常见的问题,水是隧道塌方的主要因素之一。以重庆南山隧道工程为背景,应用有限差分软件FLAC 3D对大断面尺寸隧道掌子面在高水压作用下的受力进行了数值模拟分析,得到了大断面尺寸下Ⅲ、Ⅳ、Ⅴ级围岩的隧道塌方临界水压力值及其塌方的破环模式。
Tunnel collapse is the most common problem in tunnel construction. Water is one of the main factors of tunnel collapse. Taking Chongqing Nanshan Tunnel Project as a background, the finite element software FLAC 3D was used to simulate the stress of the face of large cross-section tunnel under high hydraulic pressure. Rock tunnel collapse value of the critical water pressure and collapse of the broken ring mode.