对上下游护坡的要求是坚固耐久，能抵抗各种因素的破坏作用，并保证底层不受淘刷。
Revetments must be sturdy and durable, able to resist damages caused by various factors. Their undercourse must not be scoured.
文章以试验为基础，对块石近区的流态进行了定性描述，探讨抛石护岸岸脚淘刷的机理。
In this paper, based on the fixed bed experiment, the flow regime near the riprap is described qualitatively, and the mechanism that the bank base of dumped riprap is brushed is discussed.
试验结果表明：护坦减轻了下游纵向围堰左侧坝趾处的回流淘刷，隔流墩明显减轻了防冲墙附近河床的冲刷，确保了坝基和下游纵向围堰的安全。
The test results show that the apron can reduce back flow at the dam toe, and the piers can obviously diminish river bed scouring near the scour resistant wall.
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