Viscous mud-stone flow triangle bottom guide groove hydraulic optimum section design method and its uses

A technology of cross-section design and guide grooves, which is applied in dams, water conservancy projects, artificial waterways, etc., can solve the problems of uneconomical design, cumbersome calculation methods, and inability to obtain definite values, and achieve the effect of effective, fast and simple calculation methods

Inactive Publication Date: 2008-09-17
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

[0004] The discharge capacity of the triangular bottom drainage channel should be suitable for a certain flow and density of debris flow. There are many combinations of longitudinal slope and cross-sectional size of such a drainage channel, all of which can meet the n

Method used

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  • Viscous mud-stone flow triangle bottom guide groove hydraulic optimum section design method and its uses
  • Viscous mud-stone flow triangle bottom guide groove hydraulic optimum section design method and its uses
  • Viscous mud-stone flow triangle bottom guide groove hydraulic optimum section design method and its uses

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Effect test

Embodiment 1

[0049] Such as figure 1 , figure 2 , image 3 shown. The shape and size of the optimal hydraulic section of the triangular bottom channel for viscous debris flow are determined by the values ​​of channel width W and channel depth H.

[0050] Olive Dam Shagou is a first-class tributary on the right bank of the lower reaches of the Jinsha River, with a drainage area of ​​6.98km 2 , the length of the main ditch is 5.32km, the average gradient of the main ditch bed is 230‰, the altitude of the ditch mouth is 675m, the highest altitude is 2387m, and the relative height difference of the watershed is 1712m. The ditch is a catastrophic debris flow ditch with a high frequency of outbreaks. There have been many debris flows, which have caused serious damage to the bridges, cultivated land, and roads at the mouth of the ditch.

[0051] According to the field investigation and analysis, the debris flow in this ditch is viscous with a gravity of 2.25t / m 3 , the corresponding volume ...

Embodiment 2

[0054] Such as figure 1 , figure 2 , image 3 shown. Longwangmiaogou, a first-class branch ditch on the right bank of the upper reaches of the Dadu River in Sichuan, has a drainage area of ​​F=0.66km 2 , the length of the main ditch is 2.20km, the average gradient of the main ditch bed is 0.369, and the relative height difference of the watershed is 940m. The ditch has the terrain, loose material and water source conditions for debris flow outbreaks. It is a disastrous old debris flow ditch. There have been many mudslides in history, causing serious damage to the roads and houses at the mouth of the ditch. According to the field investigation and analysis, the debris flow in this ditch is viscous and the gravity is 2.00t / m 3 , the corresponding volume ratio sand concentration C V is 0.61. Through hydrological calculation, the design standard P 2％ The debris flow Q is 45.0m 3 / s, on-site sampling and analysis of debris flow particle composition D 10 = 0.05 mm. In ord...

Embodiment 3

[0057] Such as figure 1 , figure 2 , image 3 shown. The same places as in Embodiment 2 will not be described again, the difference is that five sand dams are arranged in the main channel in the middle and upper reaches of the watershed.

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Abstract

The invention discloses a design method of a viscous mud-flow triangle base drainage canal optimum hydraulic section and the application thereof. The invention aims at the disadvantages in the prior art that the calculation method of the drainage canal optimum hydraulic section in the triangle base drainage canal design is complicated and no unique definite value can be obtained. The invention provides the design method of the viscous mud-flow triangle base drainage canal optimum hydraulic section. The method includes the following steps: calculating the size parameter F and the characteristic parameter S of the drainage canal optimum hydraulic section; then calculating the drainage canal hydraulic radius R; and finally the width W and the depth H of the optimum hydraulic section. The method is applicable to the control of the viscous mud-flow and coordinate use with other backbone type blocking projects. Compared with the prior art, the method can reasonably determine the shape and the size of the triangle base drainage canal optimum hydraulic section with unique definite value of the calculation result, effective, rapid and convenient calculation, thereby being applicable to the practical engineering.

Description

technical field [0001] The invention relates to a design method of a debris flow drainage channel, in particular to a method for designing a hydraulic optimum section of a triangular bottom drainage channel for viscous debris flow and its application. Background technique [0002] Debris flow is a kind of geological disaster widely developed in the mountainous areas of China, especially in the southwest of China. Towns, factories, mines, villages and water conservancy facilities have seriously hindered the sustainable development of mountainous economic construction. Therefore, it is urgent to prevent and control the debris flow to ensure the sustainable development of the mountain economy. [0003] In the prevention and control measures of debris flow, the triangular bottom row guide trough has the characteristics of simple engineering structure, good control effect, local materials, convenient construction and maintenance, long service life and low cost, and is currently ...

Claims

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Application Information

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IPC IPC(8): E02B5/00E02B3/10E01F7/04
Inventor 游勇柳金峰欧国强陈晓清
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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