The invention belongs to the technical field of water conservancy and
hydropower, and particularly relates to a
maintenance system of a large-water-depth bucket type stilling
pool and an implementation method. Compared with the prior art, a permanent
water pumping and draining
system and a maintenance
cofferdam core wall structure are arranged, the top elevation of the maintenance
cofferdam core wall is slightly higher than the sum of the lowest downstream
tail water level and the wave climbing height, and a temporary filling
cofferdam is omitted; the maintenance cofferdam core wall is positioned at the downstream
tail end of the apron and is far away from the
flood discharge and energy dissipation main flow area, the structural form of protecting rockfill on the two sides of the concretemaintenance cofferdam core wall is adopted, and reliability and durability are good; anti-seepage
water stop materials are arranged between the two ends of the maintenance cofferdam core wall and therock slope and between the two ends of the maintenance cofferdam core wall and a guide wall between the plants and dams respectively, an anti-seepage curtain is arranged on the foundation of the maintenance cofferdam core wall, and the anti-seepage effect is good; a
water pumping and draining
system is arranged in the sand flushing bottom hole dam section and comprises a maintenance water collecting well, a water collecting well pump room and an embedded
pipe communicating with the stilling bucket
pool, water in the apron and the water collecting well, and arrangement and disassembly of temporary pumping and draining equipment are avoided.