渗流作用下的江河岸坡冲刷变形分析

岸坡地形随河流上游来水来沙、河势变化等因素而不断变化，直接影响岸坡稳定性。江河水流、岸坡渗流均对岸坡水下地形变化有很大的影响。通过分析泥沙受力条件和冲刷特性，应用在室内水槽进行的不同泥沙粒径在多种水流条件下的冲刷率试验研究成果，在岸坡泥沙受力分析基础上推导了崩岸冲刷率公式，并以算例具体说明江河水流和岸坡渗流对其冲刷变形过程的影响。

Analysis of scour deformation of riverbank subjected to seepage force

Many factors, such as water-level, velocity and sediment charge of river flow, affect the erosion of riverbanks. Moreover, the strong seepage force may result in a higher riverbank scour rate. The formula for riverbank scour rate under seepage force is developed based on an of analysis of forces acting on sediment particles and the experimental data in a rectangle flume by Wang. An example is given to show the application of the formula to riverbank scour rate. It is expected that the formula for bank scour rate can be used to analyze the changing process of riverbank landform and to forecast bank collapse.