Long diversion tunnel ji shikeng

The utility model relates to a long diversion tunnel ji shikeng, especially a long diversion tunnel ji shikeng who is applied to hydraulic and hydroelectric engineering technical field. The utility model provides an is taken away by rivers with accumulational piece stone in effectively preventing album stone hole, and then destroy the long diversion tunnel ji shikeng of water conservancy hydroelectric facility, including separate disposing's the hole body, the inside of the hole body is provided with grid web. Still include the tooth's socket, the tooth's socket is fixed in the internal portion in hole, place in the tooth's socket at grid web's both ends. The inside grid web who sets up of the hole body is used for preventing that the piece stone in album stone hole from being taken away by rivers. The effect of piece stone at rivers in album stone hole produces in the trend that water flow direction flowed away down, and the grid web that sets up in the internal portion in hole produces corresponding resista