Water pressure releasing device for high-water-head double-curvature arch dam

The invention discloses a high-water-head double-curvature arch dam water pressure release device in the technical field of double-curvature arch dams, which comprises a dam body, an emptying bottom hole formed in the dam body, a bottom hole machine room arranged on the downstream side of the dam body, a working door arranged below the bottom hole machine room, a release assembly arranged on the working door and an acceleration assembly arranged on the release assembly, through cooperation of the release assembly and the acceleration assembly, water in the emptying bottom hole can be rapidly drained away, the internal pressure in the emptying bottom hole is reduced, a working door can be conveniently and rapidly opened, through cooperation of the release assembly and the acceleration assembly, the overhaul and maintenance risk of the high-water-head gate can be effectively solved, and even under the condition that the internal pressure of the gate is large, the working door can be conveniently and rapidly ope