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Valley debris flow risk dividing method and application thereof

A mud-rock flow and dangerous technology, applied in water conservancy projects, water conservancy engineering equipment, buildings, etc., can solve the problems of reduced accuracy of landslide early warning, unsuitable for the division of risk of valley debris flow, and no quantitative terrain factor calculation method, etc., to achieve accurate division , Good applicability and strong applicability for disaster prevention

Active Publication Date: 2016-12-07
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The multi-level comprehensive monitoring and early warning method for landslide disasters disclosed in this patent document requires a large amount of historical record monitoring data of landslides, and then calculates the critical threshold of landslide monitoring and early warning through landslide deformation and failure model tests; and then determines whether the study area has For the possibility of landslides, although there are many landslide factors analyzed, there is little analysis of topographic factors, another important factor affecting landslides, and there is no quantitative calculation method for topographic factors, which reduces the accuracy of the entire landslide early warning, especially not suitable for valleys. Hazard Classification of Debris Flows

Method used

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  • Valley debris flow risk dividing method and application thereof
  • Valley debris flow risk dividing method and application thereof
  • Valley debris flow risk dividing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for classifying the risk of valley debris flow, comprising the following steps:

[0040] a. On-site measurement of the specific surface area value of secondary clay minerals of minerals a i , unit m 2 / g, the content of mineral components in primary minerals b i , according to formula 1 to determine the total specific surface area value n of lithological secondary clay minerals, unit m 2 / g;

[0041] n=a 1 b 1 +a 2 b 2 +a 3 b 3 +...+a i b i (Formula 1)

[0042] b. Calculate the clay index N according to formula 2;

[0043] N=n / n 0 (Formula 2)

[0044] In formula 2, n 0 is the base value of specific surface area of ​​secondary clay minerals, n 0 =10m 2 / g;

[0045] c. Measure the average rock solidity factor F on site, and determine the seepage index K of the debris flow ditch according to formula 3;

[0046] K=2.59F 2-8.64F (Equation 3)

[0047] d. Determine the debris flow geological factor G according to formula 4;

[0048] G=K 0.15 N...

Embodiment 2

[0059] A method for classifying the risk of valley debris flow, comprising the following steps:

[0060] a. On-site measurement of the specific surface area value of secondary clay minerals of minerals a i , unit m 2 / g, the content of mineral components in primary minerals b i , according to formula 1 to determine the total specific surface area value n of lithological secondary clay minerals, unit m 2 / g;

[0061] n=a 1 b 1 +a 2 b 2 +a 3 b 3 +...+a i b i (Formula 1)

[0062] b. Calculate the clay index N according to formula 2;

[0063] N=n / n 0 (Formula 2)

[0064] In formula 2, n 0 is the base value of specific surface area of ​​secondary clay minerals, n 0 =10m 2 / g;

[0065] c. Measure the average rock solidity factor F on site, and determine the seepage index K of the debris flow ditch according to formula 3;

[0066] K=2.59F 2 -8.64F (Equation 3)

[0067] d. Determine the debris flow geological factor G according to formula 4;

[0068] G=K 0.15 ...

Embodiment 3

[0081] A method for classifying the risk of valley debris flow, comprising the following steps:

[0082] a. On-site measurement of the specific surface area value of secondary clay minerals of minerals a i , unit m 2 / g, the content of mineral components in primary minerals b i , according to formula 1 to determine the total specific surface area value n of lithological secondary clay minerals, unit m 2 / g;

[0083] n=a 1 b 1 +a 2 b 2 +a 3 b 3 +...+a i b i (Formula 1)

[0084] b. Calculate the clay index N according to formula 2;

[0085] N=n / n 0 (Formula 2)

[0086] In formula 2, n 0 is the base value of specific surface area of ​​secondary clay minerals, n 0 =10m 2 / g;

[0087] c. Measure the average rock solidity factor F on site, and determine the seepage index K of the debris flow ditch according to formula 3;

[0088] K=2.59F 2 -8.64F (Equation 3)

[0089] d. Determine the debris flow geological factor G according to formula 4;

[0090] G=K 0.15 ...

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Abstract

The invention discloses a valley debris flow risk dividing method and application thereof, and belongs to the technical field of debris flow control projects. The method comprises the following steps that the specific surface area value ai of secondary clay minerals of minerals and the content bi of mineral elements in original minerals are measured so as to calculate the total specific surface area value n of lithological secondary clay minerals and the clay index N; the rock solidness coefficient F is measured so as to calculate the penetration index K; the geologic factor G is calculated; the drainage area A0 is measured so as to determine the whole-drainage area A; the whole-drainage area percentage S and the gully bed longitudinal slope J are measured so as to calculate the terrain factor T; and the discrimination factor P is calculated and the risk levels of debris flow channels are divided according to the P. According to the method, the terrain and geological effect factors of the valley debris flow are comprehensively considered, an easy-happening calculation model of the valley debris flow is built, the risk areas of landslides are divided accurately in a quantitative mode, and the method has the characteristics that the risk areas of debris flow are divided accurately, the disaster prevention applicability is high, and the disaster prevention effect is good.

Description

technical field [0001] The invention relates to the technical field of mud-rock flow prevention engineering, in particular to a method for classifying the risk of mud-rock flow in valleys and its application. Background technique [0002] Shallow surface soil landslide is one of the most widely distributed landslides, high frequency of outbreaks, and one of the most harmful geological disasters. It refers to a type of landslide that occurs on loose unconsolidated cohesive or sandy soil slopes. The slope structure is loose and has the characteristics of large void ratio, strong water permeability, and obvious stratification of the underlying rock. Its material composition is generally the weathering product of bedrock, and the accumulation thickness is usually less than 5 meters. Due to the loose sliding body, this kind of slope is easily affected by atmospheric precipitation and reservoir water level periodically, and its stability is poor. Once a landslide occurs, it will...

Claims

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Application Information

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IPC IPC(8): E02B1/00
CPCE02B1/00
Inventor 余斌刘强
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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