水工隧洞包括发电引水隧洞、尾水隧洞、灌溉和供水隧洞、泄洪隧洞、排水隧洞、施工导流隧洞等,这些水工隧洞的混凝土衬砌中存在着一个普遍的问题是裂缝。裂缝不但出现在隧洞的两侧边墙和顶拱,有的还贯穿于隧洞。本文针对各种裂缝的类别,结合各地工程实践情况和大量试验成果资料的调查 Hydraulic tunnels include power generation and diversion tunnels, tailrace tunnels, irrigation and water supply tunnels, flood discharge tunnels, drainage tunnels, and construction diversion tunnels. A common problem in concrete linings of these hydraulic tunnels is cracks. Cracks not only appear in both sides of the tunnel wall and roof arch, and some also run through the tunnel. In this paper, the types of cracks, combined with engineering practice around the situation and a large number of experimental results of the investigation of the data