Combined arrangement method for drop spillway and blow-off pipe bulkhead gate vertical shaft of pumped storage power station

The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a combined arrangement method for a drop spillway and a blow-off pipe bulkhead gate vertical shaft of a pumped storage power station, which comprises the following steps: building a circular shaft, enabling the center line of the circular shaft to be positioned on the axis of a recession tunnel, and enabling the circular shaft to be a drop spillway; a square vertical shaft is built, the center line of the square vertical shaft is located on the axis of the diversion tunnel and the blow-off pipe, the blow-off pipe and the diversion tunnel are coaxially arranged, and the square vertical shaft is a blow-off pipe bulkhead gate vertical shaft; a plurality of diversion piers are arranged at the top of an inlet weir of the drop-flow spillway, the curve of the tail of each diversion pier is in a circular arc shape, and the side edge, close to the drop-flow spillway, of the square vertical ...