Debris-flow drainage canal with energy dissipation and drainage functions and application thereof

Abstract

The invention discloses a debris-flow drainage canal with energy dissipation and drainage functions and an application of the debris-flow drainage canal with energy dissipation and drainage functions. The drainage canal comprises a fully-lining drainage canal bottom plate and drainage canal side walls on two sides of the drainage canal bottom plate; the drainage canal bottom plate is in the shape of continuously-connected multiple-stage steps, the steps are provided with grooves; the width of the grooves on the top surfaces of the steps increases gradually along the flow direction of the debris flow, and the width of the grooves on the vertical surfaces of the steps decreases gradually; and the maximum width of the grooves on the top surfaces of the steps coincide with the maximum width B on the vertical surfaces of the steps. Compared wit the prior art, the step shape design is adopted to dissipate the energy of the debris flow all the way and the groove design is adopted to drain the debris flow, so the debris-flow drainage canal disclosed by the invention has high efficiency and good drainage capacity. By adjusting the height and the length of the steps and the size and the shape of grooves, the debris-flow drainagedrainage canal can be used for preventing the debris flow with any gradient and any nature.

Description

technical field [0001] The invention relates to a mud-rock flow prevention technology, in particular to a mud-rock flow drainage groove based on step energy dissipation and groove drainage, and its application in the case of any slope and any fluid property. Background technique [0002] my country is a mountainous country with complex terrain and geological conditions. The torrents and mudslides formed under some extreme climatic conditions have seriously affected the production and life of local people. Therefore, the prevention and control of debris flow is of great significance to protect the safety of people's lives and property and promote social and economic development. Debris flow drainage channel is an important project in debris flow prevention and control engineering. According to the topography and landform conditions of the local debris flow circulation area and combined with the characteristics of debris flow itself, many experts and scholars have proposed var...

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Problems solved by technology

[0003] At present, the commonly used structural forms of debris flow drainage channels are Dongchuan trough (soft foundation energy dissipation trough) and V-shaped trough, but these two trough types have obvious deficiencies in practical engineering applications

Dongchuan Trough uses transverse ribs to block part of the debris flow, and eliminates most of its kinetic energy through strong stirring and mixing between the debris flow and the material of the ditch bed, thereby reducing the flow velocity during the discharge of the debris flow; but because the debris flow is moving downstream In the process, most of its energy has been reduced, and the flow rate has gradually decreased, resulting in the possibility of siltation, which in turn leads to the failure of the function of the drainage channel; defect

The V-shaped trough adopts the full lining method, which reduces the frictional resistance between the debris flow and the bottom of the trough, which is conducive to the speed-up of the debris flow in the process of advancing, so that the debris flow can pass through smoothly, so the phenomenon of sedimentation in the trough rarely occurs; however, due to the lack of necessary The large particles in the debris flow fluid have a strong abrasive effect on the drainage channel, which is easy to cause damage to the bottom of the channel; therefore, the V-shaped channel has insufficient energy dissipation and cannot be used for Defects with a slope greater than 20%

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