浅水波作用下护底块石对斜坡式护岸稳定性影响

在水深较小,原泥面为斜坡岩基的场区建造护岸时,应重视护底块石的设计。波浪在护底块石的上方发生破碎,卷破波对护底块体产生沿海侧方向的拖拽作用,从而导致护底块石失稳并引起护面块体的滑动。结合某护岸加固工程的方案设计和物理模型试验成果,提出在护底设计中,应结合增加护底块石质量与增大原泥面糙率两种措施制定护底块石方案;有条件时可通过增加护底长度或埋深的方式设置护底。

Influence of bottom blocks on stability of sloping revetment under shallow water wave

The design of bottom blocks should be paid attention to when revetment is constructed in the sloping rock foundation area in shallow water.The waves will break over the bottom blocks and the plunging breaker will drag the bottom blocks off the coast,which can lead to the instability of bottom blocks and the sliding of armor blocks.Combining with scheme design of revetment reinforcement project and the physical model of reinforcement revetment,we propose two measures to be taken into consideration in the bottom blocks design,which include increasing the bottom block weight and increasing the sea surface roughness.Lengthening the length of bottom blocks and increasing buried depth can also be used in the project when they are possible.