堰塞坝漫顶溃决与演变水槽试验指标初探  

Preliminary Study on Similarity Criteria of the Flume Experiment on the Breach Process of the Landslide Dams by Overtopping

作　　者：杨阳[1,2] 曹叔尤[2] 

机构地区：[1]工程泥沙交通行业重点实验室交通运输部天津水运工程科学研究所,天津300456 [2]四川大学水力学与山区河流开发保护国家重点实验室水利水电学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2015年第2期1-7,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(51079090)

摘　　要：水槽试验是研究堰塞坝体溃决机理的有效手段之一,但现有试验研究中合理的设计准则尚不多见。通过理论分析和水槽试验对堰塞坝漫顶溃决的试验设计进行了研究。基于总结分析,探讨了影响坝体溃决的因素以及堰塞坝漫顶溃决条件下溃口发展的一般进程。通过分析推导,提出了溃口发展过程中流深d的概念,并建立了用于确定模型试验比尺的指标d0/D90。根据这一指标所确立的相似准则,设计并完成了模型试验;通过与原型堰塞湖溃决过程的对比,试验结果初步印证了这一指标的合理性。该成果可以为后续的堰塞坝溃决水槽试验研究提供借鉴和参考。The overtopping of the landslide dams was studied by means of theoretical analysis and flume tests. The factors that impact the dam breach were discussed and the fundamental procedure of the dam breach development by overtopping was stated. A new concept 'flow depth'd as well as the criterion d0/ D90 was carried out to establish the scales for the flume model. Based on the similarity criterion derived,a series of flume experiments were conducted. The experimental result showed a general agreement with the prototype data which on some degree identifies the rationality of definition of the criterion in the present study. The results could be applied as reference for the subsequent relevant researches.

关 键 词：堰塞坝 漫顶 水槽试验 流深 相似准则 

分 类 号：TV122.4[水利工程—水文学及水资源] TV131.6