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V type discharging and guiding slot water power optimum section design method of viscous debris flow and application thereof

A technology of section design and drainage channel, applied in dams, water conservancy projects, artificial waterways, etc., can solve problems such as the inability to determine the optimal hydraulic section.

Inactive Publication Date: 2009-05-20
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the calculation and design of the cross-sectional shape and size of the inclined wall V-shaped row channel is more important. It is necessary to make the designed cross-sectional shape and size have a greater ability to discharge debris flow under the predetermined vertical gradient. , but at present, the shape and size of the cross-section of the V-shaped row guide groove of the inclined wall are mostly designed according to personal experience, and it is impossible to determine the optimal hydraulic cross-section

Method used

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  • V type discharging and guiding slot water power optimum section design method of viscous debris flow and application thereof
  • V type discharging and guiding slot water power optimum section design method of viscous debris flow and application thereof
  • V type discharging and guiding slot water power optimum section design method of viscous debris flow and application thereof

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Embodiment 1

[0053] Such as figure 1 , figure 2 , image 3 shown. The shape and size of the optimal hydraulic section of the V-shaped channel of the viscous debris flow inclined wall are determined by the characteristic dimension of the channel, that is, the slope depth h of the optimal hydraulic section of the V-shaped channel of the inclined wall 1 The groove bottom depth h of the optimal hydraulic section of the inclined wall V-shaped row channel 2 The value is determined.

[0054] Heishui River, a primary tributary on the left bank of Jinsha River, is located in Rehui Village, Luji Township, Huidong County, Sichuan Province, about 60km upstream from the dam site of Baihetan Hydropower Station. The drainage area of ​​the ditch is 29.5km 2 , the length of the main ditch is 11.62km, the highest point in the watershed is 2973m above sea level, the ditch mouth is 675m above sea level, the relative height difference is 2298m, and the average gradient of the main ditch bed is 205‰. Thi...

Embodiment 2

[0058] Such as figure 1 , figure 2 , image 3 shown. Xianbu Lenggou is a first-class tributary on the right bank of the Dadu River, with a drainage area of ​​15.25km 2 , the main ditch is 8.64km long, the average longitudinal gradient of the ditch bed is 214‰, and the relative height difference of the watershed is 2310m. The ditch is an old mudslide ditch. In history, mudslides have occurred many times, destroying houses and cultivated land several times, silting roads and blocking bridges, etc., causing serious harm to the lives and property safety of local people.

[0059] According to the field investigation and analysis, the debris flow in this ditch is viscous, the content of clay particles with particle size less than 0.005mm is 2.107%, and the gravity is 2.10t / m 3 , the corresponding volume ratio sand concentration C V is 0.65. Through hydrological calculation, the design standard P 2 % of debris flow Q is 177.30m 3 / s, on-site sampling and analysis of debris f...

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Abstract

The invention discloses a method for designing hydraulic optimum section of V-shaped drainage canal for viscous debris flow inclined wall and application thereof. Aiming at the default that the hydraulic optimum section can not be determined because the section form and size of the V-shaped drainage canal of the inclined wall are generally designed based on personal experience in the prior art, the invention discloses the method for designing hydraulic optimum section of V-shaped drainage canal for viscous debris flow inclined wall. The method first calculates the hydraulic optimum section size parameter Beta for the drainage canal; then calculates the hydraulic optimum section characteristic parameter S; then calculates the corresponding hydraulic diameter R of the hydraulic optimum section for the drainage canal; and finally calculates the slope depth h1 and canal bottom depth h2 of the hydraulic optimum section. The method is suitable for the control of viscous debris flow and can be used matching with other mainstay block engineering. Compared with the prior art, The method of the invention can reasonably determine the shape and size of the hydraulic optimum section of V-shaped drainage canal of inclined wall to obtain maximum flow discharge ability, has effective, fast, and simple calculation methods, and is adapted to the requirement of practical engineering.

Description

technical field [0001] The invention relates to a method for designing a debris flow drainage channel, in particular to a method for designing a hydraulically optimal section of a viscous debris flow inclined wall V-shaped drainage channel and its application. Background technique [0002] Debris flow is a typical geological disaster widely distributed in the mountainous areas of China, especially in the southwest of China. Due to its complex formation process, it has the characteristics of sudden outbreak, ferocious onset, large rushing and silting, and strong destructive power. It is often washed away or silted up. Buried railways, highways, stations, towns, factories, mines, villages and water conservancy facilities have seriously hindered the sustainable development of mountainous economic construction. In recent years, with the implementation of the western development strategy and the continuous development of the social economy in mountainous areas, as well as the int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B5/00E01F7/04E02B3/10
Inventor 游勇潘华利柳金峰陈晓清欧国强
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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