水沙条件对护岸工程损毁影响的试验研究  

Experimental study on damage of revetment works under different water and sediment conditions

作　　者：徐敏[1,2] XU Min(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;Changjiang Waterway Planning Design and Research Institute,Wuhan 430040,China)

机构地区：[1]武汉大学,水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]长江航道规划设计研究院,湖北武汉430040

出　　处：《水运工程》2021年第1期123-128,135,共7页Port & Waterway Engineering

基　　金：国家重点研发计划项目(2016YFC0402307)。

摘　　要：针对新水沙条件下航道整治建筑物损毁问题,以护岸工程为例,采用概化水槽试验,模拟研究不同水动力强度以及不同挟沙饱和度下护岸工程的冲淤特性。试验结果表明:随着断面平均流速与泥沙起动流速比值(UUc)的增大,护岸工程前沿冲刷呈指数形式增大;随着水流含沙量与水流挟沙力比值(SS*)的增大,护岸工程前沿冲刷呈对数形式减小。当UUc>3或SS*<40%时,护岸前沿冲刷范围及冲刷深度均快速增大。因此,当UUc>3或SS*<40%时,应加强对整治建筑物周边水流流速年际和年内变化的监测。研究结果可为航道整治工程设计及航道整治建筑物维护工作提供技术支撑。In view of the damage of the waterway regulation structure under the new water-sediment condition,we take revetment works as example to simulate the erosion and siltation characteristics of the revetment works under different hydrodynamic strength and different sediment saturation by the generalized flume experiment.The test results show that with the increase of the ratio of mean velocity in section to the incipient velocity of sediment(UUc),the frontal erosion of the revetment works increase exponentially.With the increase of the ratio of sediment concentration to sediment carrying capacity(SS*),the frontal erosion of the revetment works decrease in a logarithmic manner.When UUc>3 or SS*<40%,the scouring range and scouring depth of the revetment front increase rapidly.Based on this,when UUc>3 or SS*<40%,the monitoring of the interannual and intraannual changes in the surrounding works flow velocity should be strengthened.The research results can provide a technical support for the design of waterway regulation engineering and the maintenance work of waterway regulation structures.

关 键 词：护岸工程 水沙条件 冲刷范围 冲刷深度 水槽试验 

分 类 号：U656.3[交通运输工程—港口、海岸及近海工程]