水力发电学报2011，Vol.30Issue(3)：98-103,6.
河床结构对堰塞坝稳定性的影响研究
Study on the influence of riverbed structures on the landslide dam stability
摘要
Abstract
Landslide dams could be formed by mass movements such as landslides and avalanches; their stability is crucial to the security of downstream population. In this paper, the influences of riverbed structures on landslide dams stability were studied through field survey and measurement in the '5.12' Sichuan earthquake-hit area. The results indicate that streambed structures developed in the spillways of many landslide dams and that the enhancement of structure intensity Sp impeded the erosion and altered the local geomorphology features such as longitudinal profiles. The preservation height of landslide dams was proportional to Sp that took a larger value for a dam of coarser grain size. Thus, this reveals that the grain gradation could be used to estimate the development of streambed structures and the preservation proportion of dams, so that the stability of these dams could be assessed.关键词
河流泥沙工程学/堰塞坝稳定性/河床结构/结构强度/保留坝高比Key words
river sedimentation engineering/ landslide dam stability/ riverbed structures/ structure intensity/preservation proportion分类
建筑与水利引用本文复制引用
刘怀湘,王兆印,刘乐..河床结构对堰塞坝稳定性的影响研究[J].水力发电学报,2011,30(3):98-103,6.基金项目
国家自然科学基金(51009096 （）
41001008) （）
南京水利科学研究院院基金(Y210003) （Y210003）
