Abstract: The drainage engineering is widely-used in the civil engineering measurement against debris flow. In particular， the V-shaped drainage channel has played a significant role in draining the solid materials of debris flow. Based on the loading models of V-shaped drainage channel and the boundary conditions，a method of calculating the slide wall and the bottom of V-shaped drainage channel is put forward，by utilizing the theory of Rankine’s earth pressure and the calculating theory of elastic foundation beam. The case studies have been carried out in the engineering measurement against debris flow of Santan in the line of Chengdu-Kunming Railway and Pingliao Station in the line of Yidu-Liuzhou，which include the calculation of channel bottom displacement，sub-grade reaction and internal force of the V-shape channel.

Key words: debris flow, V-shaped drainage channel, calculating method

摘要： 排导工程在防治泥石流灾害中是使用最广泛的工程措施，特别是V型排导槽在排泄泥石流固体物质时有着 显著的作用。基于V型排导槽的受荷模式及边界条件，分别运用朗肯土压力理论和弹性地基梁计算理论建立了排 导槽侧墙和槽底的计算方法。并以成昆铁路三滩泥石流和枝柳线平寮站泥石流防治工程为例，主要进行了V型槽 底的位移、地基反力及内力计算。

关键词: 泥石流, V型排导槽, 计算方法