IMHE OpenIR  > 山地灾害与地表过程重点实验室
降雨型泥石流对沟床侵蚀的水力学机理
Alternative TitleHydraulic mechanism of gully bed erosion by debris flow in rainfall
吴永; 裴向军; 何思明; 李新坡
Corresponding Author吴永
2013
Source Publication浙江大学学报(工学版)
Volume41Issue:9Pages:64-71.
Other Abstract
为解决降雨型泥石流对沟床的侵蚀和重塑机理,以水文学为基础,在科学表征泥石流流深的前提下,借助水力学理论,分析了沟床在泥石流流动剪切和渗流水压耦合作用下的侵蚀机理,研究了泥石流流动剪应力、沟床基质孔压、泥石流静压及沟床自重作用的计算方法,给出了沟床侵蚀临界深度表达;借助算例阐明了流域降雨特征、沟道几何参数以及泥石流性质对泥石流流态及侵蚀力的影响规律,展示了沟道侵蚀曲线和侵蚀量的计算方法.结果表明:(1)泥石流侵蚀能力随沟床基质埋深的增加而下降,并在临界深度处消失;(2)不同降雨条件、沟谷特征和泥石流性质下的临界侵蚀深度因流深流速的差异而不同,越利于流深流速增大的流域沟道条件则越利于侵蚀的进行.
; Based on the water lever model of debris flow established according to hydrology, and by aid of hydraulic theory, the erosion mechanism of gully bed under flow shear stress and seepage hydraulic was studied. After studying the calculation methods for flow shear stress, pore water pressure, static pressure and gully bed weight, the critical erosion depth of gully bed by debris flow was proposed. By discussing the influences of rainfall pattern, gully geometric parameters and flow property to debris flow pattern and its erosion characteristics with an example, the way to calculate erosion was illustrated. The result indi- cates that the erosion becomes weak with the incensement of depth of base material, and only occurs above on a critical erosion depth in gully bed; with different rainfall conditions, gully geometric character and debris flow property, the flow depth and velocity changes greatly, which effects the gully bed erosion directly.
Keyword降雨型 泥石流 沟床侵蚀 水力学机理
DOI10.3785/j.issn.1008-973X.2013.09.011
Indexed ByEI
Language中文
Funding Organization国家自然科学基金资助项目(41202258);深部岩土力学与地下工程国家重点实验室基金资助项目(SKLGDUEK1107);地质灾害防治与地质环境保护国家重点室基金资助项目(SKLGP2012K023,SKLGP2013K012);国家科技支撑计划资助项目(2011BAK12B03);西部之光资助项目(Y2R2210210);山地所博士基金资助项目(110900K251);中国交通建设资助项目(2011-2JKJ-04)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6636
Collection山地灾害与地表过程重点实验室
Recommended Citation
GB/T 7714
吴永,裴向军,何思明,等. 降雨型泥石流对沟床侵蚀的水力学机理[J]. 浙江大学学报(工学版),2013,41(9):64-71..
APA 吴永,裴向军,何思明,&李新坡.(2013).降雨型泥石流对沟床侵蚀的水力学机理.浙江大学学报(工学版),41(9),64-71..
MLA 吴永,et al."降雨型泥石流对沟床侵蚀的水力学机理".浙江大学学报(工学版) 41.9(2013):64-71..
Files in This Item:
File Name/Size DocType Version Access License
降雨型泥石流对沟床侵蚀的水力学机理(EI(739KB) 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[吴永]'s Articles
[裴向军]'s Articles
[何思明]'s Articles
Baidu academic
Similar articles in Baidu academic
[吴永]'s Articles
[裴向军]'s Articles
[何思明]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[吴永]'s Articles
[裴向军]'s Articles
[何思明]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 降雨型泥石流对沟床侵蚀的水力学机理(EI).pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.