长江中游新九河段蔡家渡护岸损毁原因及维修对策

护岸工程在航道整治工程中被广泛用于抵御水流冲刷和维持岸线的稳定。由于护岸工程通常布置在原有岸坡易发生崩岸和垮塌的部位，易受水流冲刷而发生损毁，影响其功能的正常发挥。采用实测资料对长江中游新洲—九江河段蔡家渡护岸损毁情况进行分析。结果表明：蔡家渡护岸水下护排头部损毁严重、上游侧出现崩窝，损毁原因主要是大水作用下水流贴岸及大江侧主槽摆动等。在此基础上，分析了维修的必要性，并提出采用“补坡+镇脚”的维修方式，旨在为长江中下游类似护岸建筑物提供参考。

Causes of damage and maintenance measures of Caijiadu revetment in Xinzhou—Jiujiang reach of middle reach of the Yangtze River

The revetment project is widely used to resist the erosion of water flow and maintain the stability of the bank in the channel regulation project.It is usually arranged in the bank slope which is prone to collapse so it is vulnerable to water erosion，which is affecting its normal function.In this paper，the measured data are used to analyze the damage of Caijiadu revetment in Xinzhou—Jiujiang reach of the middle reach of the Yangtze River.The results show that the head of Caijiadu underwater revetment is seriously damaged，and the collapse nest on the upstream side becomes larger.The main reasons for the damage are the water flow attaching to the bank and swinging of the major stream channel.On this basis，the necessity of maintenance is analyzed，and the maintenance method of “repairing slope+stabilizing toe” is proposed，which can provide reference for similar revetment in the middle and lower reaches of the Yangtze River.