Sluice downstream scour prevention structure

Abstract

The invention discloses a sluice downstream scour prevention structure, and relates to the technical field of flood prevention equipment. The sluice downstream scour prevention structure specifically comprises a front wall, a rear wall, top beams, tie beams, dimension stones, composite geotechnical cloth and concrete precast blocks, wherein the front wall and the rear wall are composed of prefabricated concrete sheet piles, the front wall is located on the upstream of the downstream direction, and the rear wall is located on the downstream of the downstream direction; the top beams are arranged at the top ends of the front wall and the rear wall; the top beams are fixed through the tie beams, and one top beam is arranged between every two adjacent top beams at a set distance; the composite geotechnical cloth is made of woven cloth and non-woven cloth and is cushioned on a foundation soil layer or / and a scour prevention groove; and the concrete precast blocks are laid on the composite geotechnical cloth and are flexibly connected through polyvinyl chloride ropes. According to the sluice downstream scour prevention structure, by forming the scour prevention structure, the downstream scour prevention problem when the riverbed scour depth of a sluice downstream apron tail end outlet is large can be solved, and the safety of a sluice is guaranteed.

Description

technical field [0001] The invention relates to the technical field of flood control equipment, in particular to an anti-scour structure downstream of a sluice. Background technique [0002] There are generally three types of energy dissipation for the water flow under the sluice: underflow energy dissipation, deflecting flow energy dissipation and surface flow energy dissipation. The sluices built in rivers or estuaries in plain areas mostly adopt the underflow energy dissipation method. To reduce the energy released by the sluice, the energy dissipation facilities for underflow energy dissipation are generally composed of stilling pools, sea diffusers, and anti-scouring troughs. [0003] After the discharged water passes through the flood, the velocity distribution of the riverbed is close to the normal distribution, but there is still erosion at the end of the flood. The scour depth at the end of the floodgate determines the depth of the scour prevention groove. Since th...

AI Technical Summary

Problems solved by technology

[0005] Although the above methods are applied in practice, when the depth of the downstream anti-scour trench is less than the actual scour depth of the river bed, it is relatively difficult to rely on a certain amount of riprap to cover the scour slope after collapsing and to play an anti-scour protection role. Idealized, the engineering safety margin is not high, and it is easy to cause the downstream energy dissipation facilities to be washed away

Images