Abstract: There are more than 80 000 reservoirs in China, but 36% of them have diseases. In recent years, more and more dam breach happened under the condition of fine weather and lowwater level. Some typical examples were given here, and the main reason was that the seepage existed but the water level couldn' t fall rapidly, then failure by piping was caused. Counter- measure that adding rapid release culvert in rehabilitation was advanced. Furthermore, points about the layout position and designed water discharge amount of the rapid release culvert were discussed.

摘要： 中国有八万多座水库,而病险水库约占36%。近年来,晴天低水位情况下垮坝事故和大坝出险案例日益增多。文章列举部分典型案例, 分析其主要原因是坝体渗漏而库水位不能快速降低, 形成管涌导致出险或垮坝。提出在水库除险加固时增设快速放空涵洞防止晴天低水位出险和垮坝问题, 并对快速涵洞的布置位置、设计泄流量等问题进行了探讨。