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堰塞坝漫顶溃决过程与机理试验研究
Alternative TitleExperimental study on the overtopping outburst process and mechanism of the barrier dam
邓明枫; 陈宁生; 邓虎; 胡桂胜
Corresponding Author陈宁生
2011
Source Publication成都理工大学学报( 自然科学版)
Volume38Issue:3Pages:359-365
Other Abstract为了分析堰塞坝的溃决过程与机理,进行了堰塞坝漫顶溃决试验。结合堰塞坝的溃口扩展和溃决流量过程,将漫顶溃决过程分为最初的缓慢侵蚀阶段和之后的快速侵蚀阶段。在这个过程中,溃口在纵向上的扩展以陡坎侵蚀的方式推进,而横向上的扩展由土体坍滑失稳引起。坝体漫顶破坏属于冲刷破坏。通过分析陡坎后退过程、冲刷过程及其机理,认为冲刷过程包括土粒间剪切和孤粒搬运两个过程,土粒间剪切为搬运过程提供孤粒,而搬运过程为土粒间剪切提供作用空间。颗粒间剪切发生后,细颗粒随即被搬运,而粗颗粒多在溃口表层形成"拟混凝土"结构,阻碍陡坎下蚀。快速侵蚀阶段,随着流速、流量的增加,"拟混凝土"结构遭到破坏,溃口进一步发展。 
; In order to analyze the outburst process and its mechanism of a barrier dam,the authors carried out overtopping outburst experiment of the barrier dam.Combined with the development of the breach and outburst discharge,the overtopping outburst is divided into two processes: slow-erosion process ahead and quick-erosion process later.During these processes,the breach in the longitudinal way develops in the means of headcut erosion,while in the cross way through soil mass collapse.Overtopping outburst is a kind of erosion failure.By analyzing the process and mechanism of the headcut development and soil erosion,people can find that the erosion process includes the inter-particle shearing failure and particle transportation process.the inter-particle failure provides particles for transportation,and the particle transportation process produces an operation room for the inter-particle shearing failure.After the inter-particle shearing failure,the fine particles are carried away at once,and the coarse particles settle down on the surface of the breach and form "near-concrete" structure,preventing the headcut from incising vertically.During the quick-erosion process,with the increase of velocity and discharge,the "near-concrete" structure is destroyed,leading to the second development of breach.
Keyword堰塞坝 溃决过程 溃决机理
Indexed ByCSCD
Language中文
CSCD IDCSCD:4234945
Funding Organization“十一五”国家科技支撑计划项目(2008BAB42B06);四川省科技支撑计划(2008SZ0156)
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7768
Collection山地灾害与地表过程重点实验室
Recommended Citation
GB/T 7714
邓明枫,陈宁生,邓虎,等. 堰塞坝漫顶溃决过程与机理试验研究[J]. 成都理工大学学报( 自然科学版),2011,38(3):359-365.
APA 邓明枫,陈宁生,邓虎,&胡桂胜.(2011).堰塞坝漫顶溃决过程与机理试验研究.成都理工大学学报( 自然科学版),38(3),359-365.
MLA 邓明枫,et al."堰塞坝漫顶溃决过程与机理试验研究".成都理工大学学报( 自然科学版) 38.3(2011):359-365.
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