【摘要】 笔者利用弯道概化模型试验成果对河湾螺旋水流特性及凹岸路基的侵蚀机理进行研究。对河湾水流的形态和环流的形成、发展规律及凹岸水下路基边坡泥沙运动特性进行了分析。提出了凹岸路基的侵蚀主要是由河湾水流对路基边坡的淘刷以及路基的崩塌而引起,得出了河湾凹岸路基防冲范围。更多还原

【Abstract】 In this paper, study on the characteristics of spiral flow in curved channel and the erosion mechanism of the bend subgrade is performed by using a model of generalized typical river bend. The theory analyses about the circulation flow structure , development features and subgrade slope sediment movement laws in the bend river have been made. It is put forward that the subgrade slope erosion should be resulted from circulation flow scouring and slope failure in bend channel. As a result, the scope of subgrade protection along bend was gained.更多还原