中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
泥石流坝后侵蚀坑纵剖面形态及最大深度实验研究

文献类型:期刊论文

作者欧国强; 潘华利
刊名防灾减灾工程学报
出版日期2009-12-15
卷号29期号:6页码:684-689
关键词泥石流 拦砂坝 侵蚀坑纵剖面 侵蚀深度 实验研究
其他题名Experimental Study of the Shape and the Maximum Depth of Scour Pit Below Debris Flow Sabo Dam
通讯作者潘华利
中文摘要泥石流拦砂坝坝后侵蚀坑形态和深度是泥石流冲刷基础研究的薄弱环节。通过室内水槽实验,探讨了泥石流坝后侵蚀坑的形态和不同实验控制条件下侵蚀坑深度的变化规律等。由实验观察可知,侵蚀坑纵剖面整体上呈现两端浅中间深的形态特征,其最深点的位置随水槽坡度增大向下游方向发展;侵蚀坑坑内上游坡度较下游坡度陡,对于具有相同级配的粘性砂和无粘性砂,无粘性砂的侵蚀坑坑内坡度较粘性砂的缓;侵蚀坑的最大深度受沟床纵坡、泥石流的容重、沟床组成物质的性质(特征粒径、粘性)等因素的影响较大;泥砂粘性的存在将大大削弱侵蚀的深度。
英文摘要The shape and depth of scour pit after debris flow sabo dam is one of the weak links in the research of debris flow erosion.Therefore,this paper discussed this point by a series of indoor flume experiment.The longitudinal crosssections present shape characteristics as deep at the middle and shallow at the ends and the site of the deepest point is moving to lower reaches with the increase of the longitudinal gradient at same experimental conditions.The lower reaches’slope in the scour pit is slower than the up
per’S.Compared the slopes in the scour pit in viscous silt and non—viscous silt with the same grain composition,the former is much steeper than the later.The maximum depth of the Scour pit is affected by the longitudinal slope,the volumetric weight of debris flow and the property of the silt on the bed.Under deinite experimental conditions,it increases with the increase of the Iongitudinal slope of flume and decreases with the increase of the volumetric weight of debris flow.The results show that the viscosity of the silt reduces the depth of the scour pit greatly.
分类号P642.23
资助信息国家自然科学基金重点项目(40830742);国家科技支撑计划重大项目(2006BAB04A08);国家科技支撑计划项目(2008BAD98B00)资助
语种中文
公开日期2010-09-19
源URL[http://ir.imde.ac.cn/handle/131551/1989]  
专题成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前)
成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式
GB/T 7714
欧国强,潘华利. 泥石流坝后侵蚀坑纵剖面形态及最大深度实验研究[J]. 防灾减灾工程学报,2009,29(6):684-689.
APA 欧国强,&潘华利.(2009).泥石流坝后侵蚀坑纵剖面形态及最大深度实验研究.防灾减灾工程学报,29(6),684-689.
MLA 欧国强,et al."泥石流坝后侵蚀坑纵剖面形态及最大深度实验研究".防灾减灾工程学报 29.6(2009):684-689.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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