V型排导槽内泥石流流速横向分布探讨

A study of the transverse velocity distribution of debris flow in a V-shaped drainage canal

V型排导槽内泥石流流速的横向分布是一个与设计密切相连的非线性分布,直接关系到排导槽横断面各位置泥石流冲击力、磨蚀力等特征参数的定量计算。但目前流速公式多针对矩形槽,规范中没有关于该流速横向分布相应条款,因而导致部分已建V型排导槽因磨蚀或淤积而防治失效。鉴于此,本文试图通过合理假设,推导出泥石流流速横向分布计算公式,并以在建雅(安)泸(沽)高速公路沿线的某沟泥石流防治为工程背景,验证其具有一定的适用性,可供相关研究与设计参考。

The transverse velocity distribution of debris flow in a V-shaped drainage canal is a unlined distribution contacted with the design closely.It directly relates to the calculation of the impact force,the abrasion strength and other characteristic parameters,which are differently located in the transverse section of the drainage canal.However,there is hardly method to calculate the transverse velocity distribution;there is no yet corresponding provision on the standard.Thus it leads to the failure of the built V-shaped drainage canal prevention due to the erosion and the siltation.In view of this,this paper attempts to calculate the formula of the transverse velocity distribution of debris flow through the reasonable assumptions.Taking the debris flow prevention along the constructing Ya（An）-Lu（Gu） highway road for engineering background,this paper verifies the applicability of this method,which could be available for related research and reference to other design.