| 泥石流坝后侵蚀坑纵剖面形态及最大深度实验研究 |
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| 引用本文： | 潘华利,欧国强.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. |
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| 作者姓名： | 潘华利 欧国强 |
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| 作者单位： | 1. 中国科学院山地灾害与地表过程重点实验室、中国科学院成都山地灾害与环境研究所,成都,610041;中国科学院研究生院,北京,100049
2. 中国科学院山地灾害与地表过程重点实验室、中国科学院成都山地灾害与环境研究所,成都,610041 |
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| 基金项目： | 国家自然科学基金重点项目，国家科技支撑计划重大项目，国家科技支撑计划项目 |
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| 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。
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| 关 键 词： | 泥石流 拦砂坝 侵蚀坑纵剖面 侵蚀深度 实验研究 |
Experimental Study of the Shape and the Maximum Depth of Scour Pit Below Debris Flow Sabo Dam |
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| PAN Hua-li,OU Guo-qiang.Experimental Study of the Shape and the Maximum Depth of Scour Pit Below Debris Flow Sabo Dam[J].Journal of Disaster Prevent and Mitigation Eng,2009,29(6):684-689. |
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| Authors: | PAN Hua-li OU Guo-qiang |
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| Institution: | PAN Hua-li1,2,OU Guo-qiang1(1.Key laboratory of Mountain Surface Progress and Hazards,Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China,2.Graduated University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | 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 cross-sections 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 th... |
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| Keywords: | debris scour pit longitudinal cross-section of Scour pit depth of erosion experimental research |
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