箱型结构物封堵溃坝水力学特性试验研究

Study on closure of dambreach with sinking caissons

介绍了用箱型结构物通过爆破下沉方法封堵溃坝的水力学模型试验。基于相似理论,研究堵口过程中的水力学特性变化,得到了溃口附近的流速、流态规律,以及箱体周边的流速情况。成果为实际确定沉箱堵口方案提供了依据,同时也为今后其它堵口技术方案的研究提供参考。

The article introduces the experimental situation and study results on closure of a dambreach with sinking caissons during dam break. On the basis of simulitude theory, the variation of hydraulic characteristics is studied in the closure process of a dambreach. The laws of flow velocity and flow pattern near the dambreach as well as velocities around box caissons are found. Test results provide important base for choosing the practical scheme of blocking the dambreak at Jiujiang through adopting box caissons, and can be used as reference for decisionmaking in other similar dam break emergency.