坝内涵管是水库供水、灌溉、发电等的重要输水设施,是大坝的重要组成部分。小型水库坝内涵管损坏现象比较普遍,且修复困难,这样既影响水库安全运行,又难以发挥水库效益。余姚前溪湖水库作为浙江省“千库保安”项目,在坝内涵管处理中采用了虹吸装置,通过一次性充水后,就可以开关阀门进行灌溉。本文对该装置的原理、设计、施工、应用等情况作了介绍。 The dam culvert is an important water conveyance facility for reservoir water supply, irrigation and power generation and is an important part of the dam. The damage of the culvert pipe in the dam of a small reservoir is quite common and it is difficult to repair the dam. This not only affects the safe operation of the reservoir but also makes it difficult to exert reservoir benefits. Yuyao Qianxihu Reservoir as Zhejiang Province, “thousands of security” project, the culvert in the dam treatment using a siphon device, through a one-time water, you can switch the valve for irrigation. This article describes the principle of the device, design, construction, application and so on.