中文摘要：

根据长江中下游崩岸的基本特征,采用典型崩岸河段原体沙,在试验室中建立了概化坡体模型,针对坡体崩塌破坏机理进行模拟试验研究。结果表明,试验坡体的崩塌破坏表现形式、过程及特征与长江坍塌型崩岸基本相似。渗流强度越大,破坏作用越明显。水流冲刷的破坏作用主要是淘蚀坡脚,使坡体坡度趋缓,崩塌破坏范围及程度随之逐步减小,坡体坡脚未受淘蚀的极限稳定坡度为1∶2至1∶3。

英文摘要：

On the basis of the analysis on characteristics of riverbank failure occurred in the middle and lower reaches of Yangtze River,generalized physical model test for studying the mechanism of collapse was performed.The processes and shapes of collapse occurred in prototype were reproduced in the model.The model study result shows that the risk of collapse increases when seepage intensity become stronger.The occurrence of riverbank collapse is not only due to the scouring of the slope body but also the erosion ...