抛石护岸历史悠久，在长江中下游及国内外各大河 流中应用较为普遍。通过对块石与小颗粒石料的不同铺护方案及块石定点投抛的试验研究， 结果表明，抛石是较为理想的护岸材料，能很好地适应河床变形，粒径越小，其适应河床变 形的能力越强。抛石护岸工程效果与其粒径、覆盖率及石方量等有关。抛石在施工过程中， 在水深流速大的地方可做到在床面分布上相对比较均匀。

iprap protection of bank was applied in the middle and lower Yangtze River and many other rivers at home and abroad. The experiments on many riprap protection schemes of different diameters were carried out. The test results are summarized as follows: It could better adapt change of river bed. The less the diameter of block stone is, the stronger the ability adapting change of river bed is. Effect of riprap protection is related to the diameter, percentage of coverage and cubic meter quantity of block stones. During the process of revetment construction, it has a uniform distribution on bank slope at the place of high water depth and big velocity.