堰塞坝漫顶溃决过程与机理试验研究
Experimental study on the overtopping outburst process and mechanism of the barrier dam
查看参考文献20篇
文摘
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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。 |
其他语种文摘
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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. |
来源
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成都理工大学学报. 自然科学版
,2011,38(3):359-365 【扩展库】
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关键词
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堰塞坝
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溃决过程
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溃决机理
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陡坎
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地址
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1.
中国科学院成都山地灾害与环境研究所, 中国科学院山地灾害与地表过程重点实验室, 成都, 610041
2.
成都理工大学地球科学学院, 成都, 610059
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1671-9727 |
学科
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水利工程 |
基金
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国家“十一五”科技支撑计划项目
;
四川省科技支撑计划
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文献收藏号
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CSCD:4234945
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参考文献 共
20
共1页
|
1.
国家减灾委员会科学技术部抗震救灾专家组.
汶川地震灾害综合分析与评估,2008:57
|
被引
3
次
|
|
|
|
2.
Costa J E. The formation and failure of natural dams.
Geological Society of America Bulletin,1988,100:1054-1068
|
被引
141
次
|
|
|
|
3.
Gasiev E. Study of the Usoy landslide in Pamir:international symposium on landslide.
4thToronto,1984:511-515
|
被引
1
次
|
|
|
|
4.
中国水利水电科学研究院水利史研究室. 1933年岷江叠溪地震堰塞湖的形成及次生灾害.
中国水利,2008(10):88-89
|
被引
2
次
|
|
|
|
5.
徐方军. 部分国家和地区地震诱发堰塞湖及其抢险概况.
水利发展研究,2008(6):7-9
|
被引
4
次
|
|
|
|
6.
崔鹏. 汶川地震堰塞湖分布规律与风险评估.
四川大学学报:工程科学版,2009,41(3):35-42
|
被引
49
次
|
|
|
|
7.
Bovis M J. The July 29,1998,Debris flow and landslide dam at Capricorn Creek,Mount Meager Volcanic Complex,southern Coast Mountains,British Columbia.
Canadian Journal of Earth Science,2000,37:1321-1334
|
被引
5
次
|
|
|
|
8.
Hang Yanjun. A superlarge landslide in Tibet in 2000:Background,occurrence,disaster,and origin.
Geomorphology,2003,54:225-243
|
被引
1
次
|
|
|
|
9.
Chen Chienyuan. A landslide dam breach induced debris flow-a case study on downstream hazard areas delineation.
Environmental Geology,2004,47(1):91-101
|
被引
1
次
|
|
|
|
10.
McKillop R J. Statistical,remote sensing-based approach for estimating the probability of catastrophic drainage from moraine-dammed lakes in southwestern British Columbia.
Global and Planetary Change,2007,56:153-171
|
被引
21
次
|
|
|
|
11.
程尊兰. 典型冰湖溃决型泥石流形成机制分析.
山地学报,2003,21(6):716-720
|
被引
27
次
|
|
|
|
12.
程尊兰. 藏东南冰湖溃决泥石流灾害及其发展趋势.
冰川冻土,2008,30(6):954-959
|
被引
30
次
|
|
|
|
13.
Fread D L.
BREACH—An erosion model for earthen dam failures,1985:29
|
被引
1
次
|
|
|
|
14.
Robinson K M. A deterministic headcut advance model.
Transaction of ASAE,1994,37(5):437-1443
|
被引
1
次
|
|
|
|
15.
Hanson G J. Headcut migration analysis of a compacted soil.
Transaction of ASAE,1997,40(2):355-361
|
被引
1
次
|
|
|
|
16.
Temple D M. Headcut advance prediction for earth spillways.
Transaction of ASAE,1997,40(3):557-562
|
被引
5
次
|
|
|
|
17.
Hanson G J. Prediction of headcut migration using a deterministic approach.
Transaction of ASAE,2001,44(3):525-531
|
被引
14
次
|
|
|
|
18.
Hanson G J. Determining erosion resistance of cohesive materials.
Proceedings of ASCE Water Resources Engineering Conference,1999
|
被引
2
次
|
|
|
|
19.
唐存本. 论泥沙起动规律.
水力学报,1963(2):1-12
|
被引
71
次
|
|
|
|
20.
曹叔尤. 地震诱发山洪形成机理与评估指标初探.
西南民族大学学报:自然科学版,2008,34(6):1077-1082
|
被引
6
次
|
|
|
|
|