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松散及弱固结堰塞体溃坝形式与流量过程
Alternative TitleOutburst patterns and discharge process for weakly consolidated and loose barrier dams
邓明枫1,2,3; 陈宁生1,3; 胡桂胜1,2,3; 邓虎4; 任海若5
2011
Source Publication水利水电科技进展
ISSN1006-7647
Volume7Issue:3Pages:11-14
SubtypeArticle
Contribution Rank1
Abstract为了研究弱固结与松散堰塞体的不同破坏形式,在四川汶川地震灾区分别进行了松散及弱固结堰塞体在自然溢流条件下的破坏试验。通过对堰塞体溃决流量过程与溃决形式进行分析,发现与松散堰塞体相比,弱固结堰塞体溃坝流量的波动性更弱,溃决流量更小;松散堰塞体的溃口形式为宽深型,弱固结堰塞体的溃口形式为窄深型。侵蚀堰塞体并形成溃口的作用力主要包括因流速分布不均形成的剪应力tauv和因水流在跌坎旋流运动时形成的陡坎剪应力taue,其中陡坎剪应力起主要作用,当陡坎剪应力与堰塞体临界剪应力达到平衡时,堰塞体达到侵蚀平衡,破坏停止。
Other AbstractIn order to study different outburst patterns of weakly consolidated and loose barrier dams,the outburst experiments on loose and weakly consolidated dams under natural overflows in the disaster area of Wenchuan Earthquake in Sichuan Province were carried out.The analytic results of discharge process and outburst patterns of barrier dams show that,compared with those of the loose barrier dam,the fluctuation of outburst discharge of the weakly consolidated dam is weaker and the outburst discharge is smaller.The breaches are wide-deep and narrow-deep patterns for loose and weakly consolidated dams,respectively.The forces to erode the barrier dams and to result in breaches mainly include the shear stress tauv induced by uneven distribution of water velocity and the headcut shear stress taue resulted from the circulation of water at the headcut.The headcut shear stress taue is dominant,and the barrier dams will reach the erosion equilibrium when the headcut shear stress taue is equal to the critical stress of the barrier dams
Keyword松散堰塞体 弱固结堰塞体 溃坝流量 堰塞体溃决形式
DOI10.3880/j.issn.1006-7647.2011.01.003
Indexed ByCSCD
Language中文
CSCD IDCSCD:4286851
Citation statistics
Cited Times:3[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25992
Collection山地灾害与地表过程重点实验室
Corresponding Author陈宁生
Affiliation1.中国科学院水利部成都山地灾害与环境研究所;
2.中国科学院研究生院;
3.中国科学院山地灾害与地表过程重点实验室;
4.成都理工大学地球科学学院;
5.水力学与山区河流开发保护国家重点实验室
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding 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
邓明枫,陈宁生,胡桂胜,等. 松散及弱固结堰塞体溃坝形式与流量过程[J]. 水利水电科技进展,2011,7(3):11-14.
APA 邓明枫,陈宁生,胡桂胜,邓虎,&任海若.(2011).松散及弱固结堰塞体溃坝形式与流量过程.水利水电科技进展,7(3),11-14.
MLA 邓明枫,et al."松散及弱固结堰塞体溃坝形式与流量过程".水利水电科技进展 7.3(2011):11-14.
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