不同水位下渭北黄土台塬水库岸坡塌岸模型试验  

Model Test on Bank Collapse of Weibei Loess Plateau Reservoir Under Different Water Levels

作　　者：李常虎 马学通 高德彬[2,3] 李征征 李萍[2,3] 李同录[2,3] LI Changhu;MA Xuetong;GAO Debin;LI Zhengzheng;LI Ping;LI Tonglu(Power China Northwest Engineering Corporation Limited,Xi’an 710065,China;College of Geological Engineering and Geomatics,Chang’an University,Xi’an 710054,China;Water Cycle and Geological Environment Observation and Research Station for the Chinese Loess Plateau,Zhengning 745399,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [2]长安大学地质工程与测绘学院,陕西西安710054 [3]黄土高原水循环与地质环境教育部野外科学观测研究站,甘肃正宁745399

出　　处：《人民黄河》2023年第7期152-156,共5页Yellow River

基　　金：中国电建集团西北勘测设计研究院有限公司科研项目(XBY-KJ-2019-19);国家自然科学基金资助项目(41877242)。

摘　　要：通过现场调查渭北黄土台塬大北沟水库岸坡塌岸形态,并通过物理模型试验对不同水位条件下的直立型黄土岸坡的塌岸特征、形态开展了试验研究,试验结果表明,岸坡高度相同时,塌岸宽度与水位成正比,且水位越高塌岸频次越多、时间间隔越短、塌岸越剧烈。同时,岸坡塌岸后的水上岸坡存在直立段,水下岸坡呈曲线形,这与图解法的直线形存在一定的差异。另外,水下岸坡坡角随着与坡脚距离不同而差异较大,但远离坡脚处的水下岸坡角度基本相同,综合确定出水下综合稳定坡角为16°~18°。The collapse morphology of the loess bank of the Dabeigou Reservior which is located in Weibei loess tableland area was investiga⁃ted in the field,and experimental research on the bank collapse characteristics and morphology of the loess bank under different water level conditions was carried out by physical model tests.The results indicate that the bank collapse width is directly proportional to the water level,and the higher the water level,the more frequent the bank collapse,the shorter the time interval,and the more intense the bank collapse.Meanwhile,there is an upright section of the above⁃water bank slope and a curved underwater bank slope after bank collapse,which is differ⁃ent from the linear type of the graphical method.In addition,the underwater bank slope angle varies greatly with the distance from the toe of the slope,the angle of underwater bank slope far away from the slope toe is basically the same.And underwater integrated stability slope an⁃gle is 16°-18°.

关 键 词：黄土台塬 水库 岸坡塌岸 模型试验 水下坡角 

分 类 号：TV697.23[水利工程—水利水电工程]