Method for performing drainage and energy dissipation by utilizing steps

Abstract

The invention discloses a method for performing drainage and energy dissipation by utilizing steps. A drainage channel overflowing face is designed to be an identical-slope-ratio step structure. The ratio of height T to width h of identical-slope-ratio steps is designed slope ratio of the drainage channel overflowing face. The designed energy dissipation rate eta of a drainage channel is confirmed according to the total height P and the drainage amount q per unit width of the drainage channel and step roughness coefficient n of the identical-slope-ratio steps. The step roughness coefficient n of the identical-slope-ratio steps is confirmed according to protruding height delta of the identical-slope-ratio steps. The protruding height delta of the identical-slope-ratio steps is confirmed according to the step height T of the identical-slope-ratio steps and an included angle formed by the drainage face and a horizontal face. The step height T of the identical-slope-ratio steps is confirmed according to the drainage amount q per unit width of the drainage channel, and the drainage amount q per unit width of the drainage channel is confirmed according to the width B of the drainage channel. The drainage face is an oblique plane composed of oblique sides of a right angled triangle consisting of two right angled sides of each of identical-slope-ratio steps. The method for performing the drainage and the energy dissipation by utilizing the steps has the advantages of being simple in structure and saving engineering investment.

Description

technical field [0001] The invention relates to an energy dissipation method for a discharge channel in a water conservancy and hydropower project, in particular to a method for utilizing steps for discharge and energy dissipation. Background technique [0002] In water conservancy and hydropower projects, in order to achieve the purpose of controlling water flow, eliminating flood hazards, and rationally developing and utilizing water conservancy resources, it is often necessary to build drainage structures such as drainage channels and other drainage channels. When the water flows through the discharge structure, it often has a large amount of energy. If the discharge water is not treated, the discharge water will cause erosion to the downstream rivers and canals, and even endanger the safety of the building. Therefore, the excess energy of the discharge flow must be eliminated. Prevent scours and protect the safety of buildings. At present, there are three forms of elimi...

AI Technical Summary

Problems solved by technology

However, due to the complexity and diversity of hydraulics, topography, geology and conditions of use, and considering the rationality and economy of engineering buildings, the existing three energy dissipation methods are not suitable for all projects. Therefore, appropriate ones should be adopted according to local conditions. Energy dissipation method is very important to ensure engineering safety and reduce engineering investment

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