河道凹岸的护岸,通常采用短丁坝群工程。洪水期,这些短丁坝可充分发挥群体挑流作用,使河流沿整治线流淌,从而起到理想的整流作用。但是,丁坝间的滩地往往因挑流后产生旋涡迥水而冲刷严重。特别是在中小流量时,水流不能按整流线方向流动,冲刷岸坝更为明显,直接威胁丁坝的安全 Bank of the bank revetment, usually using short groan dam project. During the flood period, these short dams can give full play to the crowd pick-up effect and make the river flow along the remediation line, thus playing an ideal rectifying effect. However, the floodplain between the dam and the dam often swept seriously due to swirling swirling water after being drained. Especially in the small and medium-sized flow, the flow of water can not flow in the direction of the rectifying line, it is more obvious to scour the shore dam, which directly threatens the safety of the dam