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Alternative TitleStudy on method for calculation of breaching discharge of large particle-sized landslide-dam under impact of breaching and viscous debris flow
李俊1,2; 陈宁生3; 赵苑迪1
Source Publication水利水电技术
Contribution Rank3
Other AbstractThe breaching discharge of large particle-sized landslide-dam after earthquake is the key parameter for the design of the prevention project for the breaching and viscous debris flow. Based on the discharge calculation formula of broad-crest weir, a breach-blocking model for estimating the breaching discharge of large particle-sized landslide-dam is established in combination with hydrostatics and fluid mechanics. In order to solve the difficulty of how to determine the blocking coefficient omega in the breach-blocking model,the correlation between the blocking coefficient omega and the diameter of the largest particle D is regressively analyzed through the typical cases of several breaching and viscous debris flows. Finally, the applicability of the breach-blocking model for the large particle-sized landslide-dam is verified with the case of Qipangou Debris Flow-a breaching and viscous debris flow occurred in Wenchuan County on July 13,2013. The result shows that the blocking coefficient in the breach-blocking model for the breaching discharge of landslide-dam is proportional to the diameter of the largest particle,thus the breaching discharge at the breach-blocking point of potential debris flow can be quickly predicted by only determining the maximum particle size carried by debris flow,the width of potential landslide and the mean flow rate of the debris flow. The error of the estimation made on the breaching discharge of Qipangou Debris Flow is relatively smaller and is 12%,which is indicated that breach-bloc-king model for large particle-sized landslide-dam can be applied to the estimation of the breaching discharge of the large particle-sized landslide-dam within the breaching and viscous debris flows in the region after earthquake.
Keyword渍决型黏性泥石流 溃决流量 堵溃模型 大颗粒堰塞坝 震后地区 工程地质灾害防治 山地灾害形成机理
Indexed ByCSCD
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author李俊
Recommended Citation
GB/T 7714
李俊,陈宁生,赵苑迪. 溃决型黏性泥石流冲击下大颗粒堰塞坝溃决流量计算方法研究[J]. 水利水电技术,2018,49(12):169-176.
APA 李俊,陈宁生,&赵苑迪.(2018).溃决型黏性泥石流冲击下大颗粒堰塞坝溃决流量计算方法研究.水利水电技术,49(12),169-176.
MLA 李俊,et al."溃决型黏性泥石流冲击下大颗粒堰塞坝溃决流量计算方法研究".水利水电技术 49.12(2018):169-176.
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