An apron foundation protective drainage body

Abstract

The invention discloses an apron foundation protecting drain body, and relates to the technical field of water resources and hydropower engineering. The apron foundation protecting drain body comprises a barrel body, a bottom cover arranged below the barrel body, and a top cover mounted on the barrel body; multiple water penetrating holes are formed in the bottom cover and the top cover; and a filter device is arranged in the barrel body, and is provided with a first-grade stone filter, a first-grade filter non-woven fabric, a second-grade stone filter, a second-grade filter non-woven fabric and a high molecular fiber polymer netty filter from bottom to top. The drain body is put in a drain hole of a built apron; and the top of the drain body is leveled with the surface of a baseplate of the apron without generating the water stop phenomenon. The filter device arranged in the drain body can stop discharge of fine foundation particles.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and relates to an apron foundation protective drainage body for the downstream apron of a hydraulic energy dissipation structure. Background technique [0002] The apron is one of the main facilities for energy dissipation and scour prevention downstream of the sluice and overflow dam, and it is a rigid structural facility used to protect the riverbed from water scour or other erosion damage. The safety and stability of the apron play a vital role in the normal operation of the entire energy dissipation and anti-scour system. When the upstream water level is high, the seepage and seepage diameter will produce a vertical upward pressure on the apron bottom plate, which will have an adverse effect on the anti-floating stability of the apron. For this reason, the design uses drainage holes on the bottom plate of the apron to guide the discharge of the seepage, s...

AI Technical Summary

Problems solved by technology

[0005] In order to effectively solve the damage phenomenon of voids in the loose foundation of the apron caused by seepage and lifting pressure, from the perspectives of safety, economy, and technology, how to modify the drainage holes installed in the existing apron to prevent the loose foundation of the apron from appearing voids In order to ensure the safety of the apron and the normal operation of the energy dissipation and anti-scour system downstream of the sluice and overflow dam, it has become an important issue that needs to be solved urgently.

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