A rear sidewall retreat type deflecting nose sill

Abstract

Disclosed is a tail side wall retreat type flip bucket. The tails ide wall retreat type flip bucket is composed of a transition section and a flip bucket section, wherein the transition section is connected with the downstream tail end of a spillway, one end of the flip bucket section is connected with the transition section, and the other end of the flip bucket section is connected with a riverway. The transition section is composed of a transmission section bottom plate and side walls of the two sides of the transition section bottom plate. The width of the transmission section bottom plate is the same with the width a spillway bottom plate. The flip bucket section is composed of a flip bucket section bottom plate and side walls of the two sides of the flip bucket section bottom plate. The flip bucket section bottom plate is an upwards-concave curved surface or is formed by connecting a plane section located at the same elevation with the transmission bottom plate with an upwards-concave curved surface section in the water flow direction in sequence. A water outlet of the tail of the flip bucket section is formed by combining a side water outlet formed by retreat of tail side wall of the two sides or one side of the flip bucket section, an inclined cutting water outlet and a tail end water outlet. The flip bucket is used for a narrow and curved riverway, scour of a single-side flip jet water flow on the opposite bank of the riverway is weaken, scour on surge of a river bank of the opposite bank is reduced, and the safety of the bank is ensured.

Description

technical field [0001] The invention belongs to the field of ridges in deflecting flow energy dissipation facilities of water conservancy projects, and in particular relates to a side wall retreating type ridge. Background technique [0002] The deflected flow energy dissipation is a form of energy dissipation widely used in water conservancy projects. Most of the discharge structures with an operating water head exceeding 70m adopt deflected flow energy dissipation. The working method of deflecting flow energy dissipation is to introduce the water flow into the discharge channel, then lift the water flow away from the hydraulic structure through the nose sill, and use the kinetic energy of the water flow and the guiding function of the nose sill to throw the water flow into the air and fall into the downstream. The biggest advantage of deflected flow energy dissipation is that the engineering structure is simple, easy to build, and the cost is relatively low. There are var...

AI Technical Summary

Problems solved by technology

However, for a narrow and curved river, the entry point of the water near the downstream side of the river is very easy to approach the opposite bank, and because of the angle between the entry direction and the river, the water will hit the opposite bank at a higher speed, resulting in Larger swells endanger the safety of the opposite bank

For this problem, the existing solutions are usually to widen the downstream channel and strengthen the opposite bank slope, which will increase the project cost and construction period

Images