I don't understand what the elevation of the factory floor is.
Typically, the interior of a vertical power plant building is divided into several layers from top to bottom: generator layer, turbine layer, volute layer, and suction pipe layer.
The horizontal power plant building is divided into: generator layer and leakage pipeline chamber layer.
The elevation of the ground is therefore not clear.
Generally speaking, the upstream water level and the tailrace water level are first determined by hydraulic calculations, thereby determining the elevation of the pipe layer. suction, then the designer of the generator equipment determines the height of the layers above. , then gets the elevation of each layer.
As mentioned above, the elevation of the tailrace deck generally takes traffic requirements into account. Some are as high as thegenerator floor, and others are much higher than the generator floor, such as river bed type and. behind the dam. For power plants, the tailrace platform may be flooded below the design flood, but the lifting platform must be located above the design and verification flood.