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考虑爬高效应的泥石流弯道超高公式
Alternative TitleA modified debris-flow super-elevation formula with the run-up effect
赵晋恒1,2,3; 胡凯衡1,2; 唐金波1,2; 李浦1,2,3
Corresponding Author胡凯衡
2015
Source Publication水利学报
ISSN0559-9350
Volume46Issue:2Pages:190-196
Other Abstract弯道超高是泥石流运动的显著特征。以往研究认为弯道超高完全是由于泥石流的离心运动造成的,未考虑泥石流在弯道运动时的冲起爬高效应。假设弯道超高和爬高分别由泥石流沿弯道的切向和法向速度引起,根据弯道处速度矢量三角形和圆弧三角形的几何相似关系,推导了考虑爬高效应的泥石流弯道超高公式。该公式依赖于弯道的内外曲率半径比、泥石流速度和沟壁倾角,适用于弯道圆心角小于60°和沟道较宽的情形。经云南东川蒋家沟的野外实际调查数据以及其他文献中的数据验证,与实测值误差较小,可用于泥石流弯道爬高的实际计算中。 ; Debris flow exhibits a noticeable super-elevation when it passes through a meandering stream. Previous studies attributed the super-elevation completely to debris-flow centrifugal motion in bends of the stream and neglected the run-up effect on it. Assuming the super-elevation and run-up caused respectively by tangent and normal velocity components of debris flows along the bends, a new formula for calculating the super-elevation is derived from the combination of the traditional forced vortex equation and the velocity head equation by virtue of geometric similar relationship between triangles of velocity vector and the curved channel. The total super-elevation is a function of flow velocity, ratio of internal and external curvature radiuses, and bank inclination angle. The new formula is applicable to the wide curved channel of which turning angle is less than 60°. The relative error between the calculated and field or experimental measured values is less than 17%, which is acceptable for practical purpose.
Keyword弯道超高 爬高 泥石流 流速
Subject AreaP642.23
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Indexed ByEI
Language中文
Funding Organization中国科学院重点部署项目(KZZD-EW-05-01),国家自然科学基金重点项目(41030742)和国家自然科学基金面上项目(41371039)
Accession numberAccession number: 20151200650329
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7501
Collection山地灾害与地表过程重点实验室
Affiliation1.中国科学院山地灾害与地表过程重点实验室
2.中国科学院水利部成都山地灾害与环境研究所
3.中国科学院大学
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
赵晋恒,胡凯衡,唐金波,等. 考虑爬高效应的泥石流弯道超高公式[J]. 水利学报,2015,46(2):190-196.
APA 赵晋恒,胡凯衡,唐金波,&李浦.(2015).考虑爬高效应的泥石流弯道超高公式.水利学报,46(2),190-196.
MLA 赵晋恒,et al."考虑爬高效应的泥石流弯道超高公式".水利学报 46.2(2015):190-196.
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