大跨径隧道围岩应力有限元分析

Finite Element Analyses of Surrounding Rock Stress in Large-span Tunnel

运用有限元法的基本原理,对处于设计阶段的广东惠州牛湖山双线六车道高速公路隧道的围岩应力状态进行了数值模拟和分析.并将分析结果与一般隧道及按规范规定的简化公式求得的结果进行了比较,得到了大跨径隧道围岩应力的一些分布规律,为今后类似工程项目的施工提供了参考依据.

According to the basic principle of finite element method, some numerical tests and analyses are used for the stress condition of Niuhushan tunnel, which is six-lane superhighway of double lines, constructed in Huizhou in Guangdong Province. And the results were compared with those from the general tunnel and simplified formulas of norm. Some distribution rules of large-span tunnel surrounding rock stress are included, in order to provide the reasonable foundation for similar engineering construction in future.