引用本文:牛晨曦,张幸农,应强,假冬冬.流滑型窝崩水流运动和地形变化概化模拟试验[J].水利水运工程学报,2019,(4):17-23
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流滑型窝崩水流运动和地形变化概化模拟试验
牛晨曦, 张幸农, 应强, 假冬冬
南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京
摘要:
关键词:  流滑型窝崩  水流运动  地形变化  概化试验
DOI:
分类号:TV122
基金项目:国家重点研发计划资助项目(2018YFC0407302);国家自然科学基金资助项目(51779148,51679147,51579151)
Generalized simulation tests on flow movement and slope topography change of riverbank flow-induced slide with nest shape
NIU Chenxi, ZHANG Xingnong, YING Qiang, JIA Dongdong
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing
Abstract:
The generalized simulation tests on riverbank flow-induced slide with nest shape are carried out in a typical collapse flume for the flow-sliding caving with nest shape in the middle and lower reaches of the Yangtze River, and the formation and development process of the flow-induced collapse and the flow movement and slope topography change in the pond are analyzed and studied. The experimental results show that the flow-induced slide is mainly caused by the erosion of water flow and the continuous collapse of the upper soil of the riverbank slope, and develops rapidly; and its development process mainly includes the initial stage, the preliminary stage, the middle stage, the mature stage and the stable stage. With the development of the flow-induced slide with nest shape, the riverbank collapses and the nest pond expands continuously, backflow inside the nest pond and the vortex outside the mouth gradually move downward, and the backflow inside the nest pond tends to change from being ellipse-shaped to round-shaped, the backflow intensity changes from strong to weak, and the riverbank slope is first scoured away as a whole, and then the nest pond gradually expands from the whole part to a half one. The simulation tests have further explored the hydrodynamic and geomorphic characteristics during the formation and development of the flow-induced collapse. The study can provide some references for similar experimental researches in the future.
Key words:  riverbank flow-induced slide  flow movement  slope topography change  generalized lab tests
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