Abstract: The most effective way to go through the large-scale debris flow's sedimentary region is the tunnel in debris flow.The key point of the tunnel in debris flow's calculation is how to define the load case.The main differences of structure calculation is the tunnel in debris flow bears the pound of debris flow.When the debris flow breaks out,tunnel in debris flow has two cases.One is deposition,and the other is flush.We can calculate the tunnel in debris flow's internal force by structure mechanics.At the same time,we must consider the tunnel's longitudinal stability,because the tunnel is lay in the debris flow.

Key words: debris flow along highway, tunnel in debris flow, load case, the principle of calculating, application

摘要： 泥石流隧道是道路通过大型泥石流沉积区的最为有效的型式。泥石流隧道的荷载确定是其结构计算的关键,与一般的公路隧道相比,主要区别在于它承受了泥石流的冲击力。泥石流隧道在泥石流活动期间的荷载工况组合主要有2种,即淤积工况和冲刷工况。泥石流隧道的结构的内力计算主要按结构力学的方法进行计算,同时,由于泥石流隧道置于泥石流体中,所以还要考虑它的纵向稳定性。

关键词: 公路泥石流, 泥石流隧道, 荷载工况, 计算原理, 应用