金盆水利枢纽工程溢洪洞水力设计

Hydraulic Design of Flood Discharge Tunnel of Jinpen Project

溢洪洞是水利枢纽工程中重要的泄洪建筑物之一,而且其泄洪流速一般都很高,很容易产生混凝土的空蚀破坏,从而影响建筑物的正常使用,选择合适的体型是溢洪洞防止空蚀破坏的首要环节,而防空蚀破坏的关键是溢洪洞高流速段洞内过流面压力分布不能产生超过混凝土允许的负压力。就金盆水利枢纽工程溢洪洞水力设计及所采取防空蚀破坏的措施进行了介绍。

The flood discharge tunnel is an important part of the structures in flood control project, and the velocity of flood discharge is generally high-speed, and easy to cause concrete cavitations erosion, which may affects the normal operation of structures. So that choosing the right size is a primary step to prevent erosion damage for a flood discharge tunnel, and the key to prevent erosion damage is that the pressure distribution of flow inside the tunnel can not be higher than the negative pressure allowed by concrete. The hydraulic design and preventing cavitations damage of the Jinpen flood control project were expounded in the paper.