长江口深水航道南导堤上段整治建筑物损坏原因及对策

在长江口航道养护工作中,为查找南导堤上段局部整治建筑物损坏的原因,通过对现场的详细调查和对损坏区段的地形状况、水动力特征、水动力模型进行分析,得知损坏的主要原因,即在河势条件及水动力因素综合作用下,近堤边坡不断变陡,从而导致了损坏。据此编制修复设计方案,并完成修复,取得良好的效果。

Damage causes of regulation buildings in the upper south dike of the Yangtze River estuary deep water channel and countermeasures

In the maintenance work of the Yangtze River estuary channel,in order to find out the reasons for the damage of the local renovation buildings in the upper section of the south dike,the paper carries out the a detailed field investigation and analyzes the topographic condition,hydrodynamic characteristics and hydrodynamic model of the damaged section,and gets to know main causes of the damage,i.e.,under the combined action of river regime conditions and hydrodynamic factors,the slope near the embankment turns steeper gradually,which leads to the damage. Based on this,the repair design scheme is compiled and the repair is completed with good results achieved.