Waterproof layer structure for bottom of clean water reservoir

The utility model relates to a waterproof layer structure, in particular to a waterproof layer structure for the bottom of a clean water reservoir. The bottom of the clean water reservoir is composed of four layers, the first layer is a clay layer, the second layer is a coal tar layer, the third layer is the mixed layer of asphalt and tire blocks, the fourth layer is a cement concrete layer, the coal tar layer is used as the second layer and paved on the first layer, the mixed layer of asphalt and tire blocks is paved on the second layer, and the topmost layer is the four layer, that is, the cement concrete layer; the tire blocks are the tire blocks with a size of 10 square centimetres, which are formed by cutting tires. The utility model provides a structure convenient to construct, reasonable in cost, and capable of meeting waterproof requirements on the bottom of the clean water reservoir.