High concrete face rockfill dam in narrow river valley area is with narrow toe board arrangement structure

The utility model belongs to the hydraulic and hydroelectric engineering field specifically discloses a high concrete face rockfill dam in narrow river valley area is with narrow toe board arrangementstructure, aim at solving how to reduce narrow toe board the aspect ratio in order to strengthen its stable problem. This narrow toe board arrangement structure, including narrow toe board, impermeable plate and panel, narrow toe board setting is on riverbed basis and two bank base rocks, and the low reaches terminal surface of narrow toe board includes inclined plane and downside, the panel slope sets up, and the lower extreme and the last inclined plane of panel link together, still include the key -wall, the key -wall sets up on the bottom surface of narrow toe board low reaches end, impermeable plate sets up and to link together at the downstream side of key -wall and with the low reaches terminal surface of key -wall. Through setting up the key -wall on the bottom surface at narrow toe board low reaches end