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Viscous debris flow rectangular drainage groove depth measuring and calculating method and application

A debris flow and drainage channel technology, which is applied in water conservancy projects, sea area projects, water conservancy engineering equipment, etc., can solve the problems of limited practicality and large errors, and achieve the effect of wide applicability, avoiding subjective judgment and limited practicality

Inactive Publication Date: 2015-05-20
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Most of the roughness coefficients in these formulas are obtained by regressing some observation data of debris flow ditches, so their practicability is limited, and the error is relatively large when applied to other debris flow ditches; The personnel determined through on-site investigation that such a method has the defect of subjective judgment in practical application

Method used

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  • Viscous debris flow rectangular drainage groove depth measuring and calculating method and application
  • Viscous debris flow rectangular drainage groove depth measuring and calculating method and application
  • Viscous debris flow rectangular drainage groove depth measuring and calculating method and application

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Embodiment 1

[0042] A debris flow ditch with a drainage area of ​​3.52km 2 , the length of the main ditch is 3.52km, the average gradient of the main ditch bed is 288‰, the altitude of the ditch mouth is 675m, the highest altitude is 1689m, and the relative height difference of the watershed is 1014m. The mudslides have caused serious harm to the bridges, cultivated land, and roads at the mouth of the ditch. In order to alleviate and eliminate debris flow disasters, a debris flow drainage channel is planned to be arranged between the mouth of the mountain exit and the main river in the basin. Using the method for measuring and calculating the depth of the viscous debris flow rectangular drainage channel of the present invention to design the depth of the drainage channel, the specific steps are as follows:

[0043] The first step is to determine the bulk density of debris fluid under the design standard through actual sampling and measurement of bulk density γ d 22.07kN / m 3 , bulk densi...

Embodiment 2

[0048] In the early morning of July 16, 2006, a large-scale debris flow broke out in Wawagou on the left bank of the Hongba River in Jiulong County, Ganzi Tibetan Autonomous Prefecture, Sichuan Province. The gate areas, workshops and water intakes of the three downstream power stations were washed away. Wawagou is located at 102°01′34″-102°05′20″ east longitude and 29°14′08″-29°17′50″ north latitude. It is located on the southeastern edge of the Western Sichuan Plateau. It is a viscous debris flow ditch and the main ditch of the watershed. 5.5km long. The basin is 2025-5014m above sea level, with a relative height difference of 2989m, and belongs to the middle-alpine-alpine landform. In order to effectively control the debris flow ditch, it is planned to arrange a debris flow drainage channel between the mouth of the mountain mouth and the main river in the basin. Using the method for measuring and calculating the depth of the viscous debris flow rectangular drainage channel...

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Abstract

The invention discloses a viscous debris flow rectangular drainage groove depth measuring and calculating method and application. According to the method, the influences of the debris flow volume weight, the debris flow solid matter grading, the ditch bed gradient and the mud depth on the flow velocity of viscous debris flow are fully considered, and a viscous debris flow mean velocity calculation formula with high applicability is established based on statistical regression of a large quantity of observation and exploration data, and then the design depth of a rectangular drainage groove for the viscous debris flow can be determined by combining the design width of the drainage groove and the design flow of the drainage groove on the design conditions and considering the free height of the drainage groove. The method can provide effective technical support for optimal design of the rectangular drainage groove for the viscous debris flow and meet the practical engineering requirements.

Description

technical field [0001] The invention relates to a method for designing a drainage channel, in particular to a method for measuring and calculating the design depth of a rectangular drainage channel suitable for viscous debris flow and its application. Background technique [0002] Debris flow is a common geological disaster in mountainous areas of China. It has the characteristics of sudden occurrence, short duration, ferocious onset, large erosion and silting, and strong destructive power. In recent years, under the disturbance of increasing seismic activity, coupled with the significant increase in extreme weather caused by global climate change, debris flow activities are very active, major debris flow disasters occur frequently, and the safety of people's lives and property is seriously endangered and threatened. In order to ensure the sustainable development of the mountain economy, the prevention and control of debris flow is very necessary. [0003] Rectangular debri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/00
CPCE02B1/00E02B3/00
Inventor 王涛游勇陈晓清陈剑刚李昆
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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