平顺抛石护岸水毁速率试验研究

Experimental study on water damage rate of smooth riprap revetment

平顺抛石护岸主要用于增强堤防和岸滩的稳定性,有利于沿江城乡的防洪安全。然而,岸坡水下坡脚极易受水流淘刷,往往造成坡脚处根石失稳,坡面形成空白间隙,岸坡稳定性下降,甚至对堤防安全造成威胁。因此,研究抛石护岸的水毁现象十分必要。在原型观测及水槽试验的基础上,根据坡面空白间隙的发展,对抛石护岸的水毁破坏方式及水毁速率进行了研究,得到了坡面空白间隙的发展规律,阐述了平顺抛石护岸的水毁特征。

Smooth riprap revetment of embankment can increase the flood control capacity of embankment and beaches,which is conductive to the flood safety of plains and major cities along the Changjiang River.However,the underwater slope foot of the bank slope is easy to be scoured by water flow,which often results in the instability of the root rock at the foot of slope,forming a blank gap on the slope surface,and the stability of the bank slope decreases,even the safety of the embankment is threatened.Therefore,it is necessary to study the water damage phenomenon of riprap revetment.On the basis of prototype observation and flume experiment,we studied the water damage mode and water damage rate of the riprap revetment based on the development of the blank gaps on the slope,obtaining the development law of the bank gap on the slope surface and the water damage characteristics of the riprap revetment.