川江航道整治建筑物损毁原因及维修对策研究

Damage causes of navigation regulation structures in upper Yangtze River and maintenance countermeasures

川江航道属典型的山区河流航道,水流湍急,流态紊乱,航道整治建筑物水毁现象比较常见。分析了整治建筑物损毁的两个主要原因:筑坝块石直接起动损毁和坝体外侧冲刷坑崩塌造成损毁,并且揭示了造成坝体损毁的内在因素。结合近年来川江航道坝体维修经验,对维修效果较好的混凝土坝面、扭王字块和钢丝石笼等结构进行了总结,分析其应用效果和存在的问题,为今后类似坝体的维修和设计提供参考。

The navigation channel of Yangtze River from Yibin to Yichang is a typical mountainous channel with rapid and turbulent flow.Therefore,the damage to navigation regulation structure appears frequently.The interior factors of structure damage are discovered as follows,the desquamation of block-stone of dam construction and the scour-holes at lateral side of dam body.The new structures satisfying the maintenance requirements are summarized,including concrete dam surface,accropodes and wire gabion.Their effects and existing problems are analyzed,which will be helpful to the design and maintenance of similar dam bodies in the future.