CAJ | 학술논문

黏性土坝漫顶溃决是一个水、土二相耦合逐渐发展的过程,涉及水流冲蚀主动力和坝体材料被动抗力的综合作用. 立足当今世界溃坝研究的前沿理论,借鉴以往现场原型试验相关成果,对土坝溃决过程进行了宏观阶段划分,并在此基础上开展专门的水槽试验,采用PIV技术对表面冲刷水流和陡坎冲射水流的精细水流结构进行了详细研究. 试验获得了两种典型水流的几何特性及相关水力特性,总结分析了各水流结构对坝体的冲蚀作用机制. 相关成果的获取可从本质上对黏性土坝陡坎溯源冲蚀机理进行理解和掌握,亦可为数值模拟及其他溃坝研究工作提供技术参考.
점성토패만정궤결시일개수、토이상우합축점발전적과정,섭급수류충식주동력화패체재료피동항력적종합작용. 립족당금세계궤패연구적전연이론,차감이왕현장원형시험상관성과,대토패궤결과정진행료굉관계단화분,병재차기출상개전전문적수조시험,채용PIV기술대표면충쇄수류화두감충사수류적정세수류결구진행료상세연구. 시험획득료량충전형수류적궤하특성급상관수력특성,총결분석료각수류결구대패체적충식작용궤제. 상관성과적획취가종본질상대점성토패두감소원충식궤리진행리해화장악,역가위수치모의급기타궤패연구공작제공기술삼고.
The overtopping dam-break is a process of gradual development with soil -water coupling .It relates to the comprehensive effect of active erosion force of flow and passive resistance of dam body mate -rial.Based on the forward theory of current world dam break and refered to the previous field prototype test results , the paper made a macro stage division for dam break process and carried out a special flume experiment by using PIV technology .It exhaustively investigated the fine structure of surface flow and headcut flow .Through the experiment , the paper got the geometric and hydraulic characteristics of two typical flow and summarized the erosion mechanism of each flow structure on dam body .The result can make us understand the dam -break mechanism inessence and also provide technical reference for nu-merical simulation and other research work on dam break .