Vibration reduction and explosion reduction split type imported energy dissipation device

Abstract

The invention discloses a vibration and explosion reducing array type inlet energy dissipater which comprises a water flow discharge chute section, a stilling pool connected with the water flow discharge chute section and an apron connected with the stilling pool, wherein the water flow discharge chute is divided into a surface hole discharge chute and a middle hole discharge chute in spaced arrangement by a middle partition wall; the two side surfaces of the middle partition wall are the chute walls of the surface hole discharge chute and the middle hole discharge chute respectively; a connection beam is arranged between the two chute walls of the surface hole discharge chute or / and the middle hole discharge chute; the two ends of the connection beam are respectively fixed on the two chute walls of the surface hole discharge chute or / and the middle hole discharge chute to connect the middle partition wall. The energy dissipater disclosed by the invention can be used for reducing the vibration caused by a weak cantilever structure of the middle partition wall and reduce the influence of burst of an air bag wrapped by water flow on the safety of the buildings around.

Description

technical field [0001] The invention belongs to flood discharge and energy dissipation facilities, in particular to a vibration-reduction and explosion-reduction split-type imported energy dissipation facility for high water head and large single-width flow. Background technique [0002] The split-type imported energy dissipator is a flood discharge and energy dissipation facility used under the condition of high water head and large single-width flow, including the water flow chute section, the stilling pool connected to the water flow chute section, and the protection tank connected to the stilling pool. The water flow chute section is divided into alternately arranged surface chute (high chute) and middle chute (low chute) by the middle partition wall. According to whether the depths from the outlet of the surface hole discharge chute (high discharge chute) and the middle hole discharge chute (low discharge chute) to the bottom plate of the stilling tank are equal, it can...

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Problems solved by technology

[0003] Existing differential or non-differential split-type inlet energy dissipators, the middle partition wall of the water flow chute section is a cantilever structure (see CN101215828A, CN101624818B), so there are the following problems: 1. The vibration problem of the middle partition wall (for the middle partition The safety impact of the wall itself), due to the weak shear, bending and vibration resistance of the partition wall of the cantilever structure, it usually requires a higher amount of reinforcement to meet its stability requirements

But despite this, in the case of large single width and high head flow, due to the thin partition wall in the cantilever structure, the flow rate of the water stream passing through the high and low holes on both sides is high and turbulent, which can easily cause the middle The vibration or even resonance of the partition wall poses a great threat to the safety and stability of the partition wall; 2. The impact on the safety of surrounding buildings, in the case of large single width and high water head flow, when the water flow crosses the partition wall It is easy to engulf a large amount of air and form a huge air bag. After the air bag enters the stilling pool, it floats up under the action of buoyancy, and is squeezed, sheared and strongly pulsated by the surrounding water body, so it explodes suddenly near the water surface, causing the stilling pool to rise This air pressure pulsation is extremely detrimental to the safety and stability of the side wall of the stilling pool and the surrounding light buildings, affects the surrounding residents, and even causes the vibration of the doors and windows of the building and the breaking of glass, etc.

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