爆炸荷载作用下岩溶区隧道围岩变形分析

【摘要】 本文采用国际上常用的爆炸荷载的计算模式 ,计算了朝东岩隧道爆破时的爆炸荷载 ,采用Ansys大型有限元程序分析了岩溶地区隧道顶部有溶洞的围岩在爆炸荷载瞬息作用下的变形 ,分析结果认为 :以朝东岩隧道为例 ,当溶洞直径为 4m时 ,岩溶洞边缘离隧道顶部小于 3m时 ,在爆炸荷载瞬息作用下 ,隧道顶部与溶洞将会贯通 ,产生施工危害。更多还原

【Abstract】 This paper calculates the explosive load of Chaodongyan Tunnel by using the explosive pattern frequently used in the world, analyzes the deformation of surrounding rock under explosive load in karst area with large scale finite element program. Results show that when cave diameter is 4m and the gap between the karst cave edge and the tunnel top is less than 3m, the tunnel top and the cave will link up under the instant explosive load, and this would cause in damage in construction.更多还原