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A kind of early warning method and application of rock landslide in red bed area

A technology of red bed area and rock quality, applied in the field of early warning of rock landslide in red bed area, can solve the problems of poor accuracy and applicability of landslide early warning, lack of in-depth research on the internal mechanism, etc., to shorten the early warning response time and improve disaster prevention. The effect of high ability and early warning accuracy

Active Publication Date: 2020-01-10
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The method for identifying deformation evolution stages of rock landslides in eastern Sichuan red beds disclosed in this patent document focuses on the study of landslide formation conditions mainly on the slope of the slope. Mechanism, landslide early warning accuracy and applicability are poor

Method used

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  • A kind of early warning method and application of rock landslide in red bed area
  • A kind of early warning method and application of rock landslide in red bed area
  • A kind of early warning method and application of rock landslide in red bed area

Examples

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Embodiment 1

[0039]A kind of early warning method of rock landslide in red layer area, comprises the following steps:

[0040] a. Determine the basic topographical data of the landslide body through on-site surveying and mapping, including the slope of the landslide body α, the area of ​​the landslide body A, and the upper side area of ​​the landslide body A u and the side slope β on the landslide body;

[0041] b. Monitor rainfall and obtain the duration and average rainfall intensity of rainfall;

[0042] c. Calculate the early warning discriminant factor P of the landslide according to the formula 1 from the terrain factor and the rainfall factor;

[0043] P=TR 0.67 Formula 1

[0044] Among them, P is the early warning discrimination factor, T is the terrain factor, and R is the rainfall factor;

[0045] d. Use the landslide early warning discrimination factor P to divide the early warning level of rock landslides. When P≥1.85, the possibility is high, and it is a red early warning...

Embodiment 2

[0048] A kind of early warning method of rock landslide in red layer area, comprises the following steps:

[0049] a. Determine the basic topographical data of the landslide body through on-site surveying and mapping, including the slope of the landslide body α, the area of ​​the landslide body A, and the upper side area of ​​the landslide body A u and the side slope β on the landslide body;

[0050] b. Monitor rainfall and obtain the duration and average rainfall intensity of rainfall;

[0051] c. Calculate the early warning discriminant factor P of the landslide according to the formula 1 from the terrain factor and the rainfall factor;

[0052] P=TR 0.67 Formula 1

[0053] Among them, P is the early warning discrimination factor, T is the terrain factor, and R is the rainfall factor;

[0054] d. Use the landslide early warning discrimination factor P to divide the early warning level of rock landslides. When P≥1.85, the possibility is high, and it is a red early warnin...

Embodiment 3

[0065] A kind of early warning method of rock landslide in red layer area, comprises the following steps:

[0066] a. Determine the basic topographical data of the landslide body through on-site surveying and mapping, including the slope of the landslide body α, the area of ​​the landslide body A, and the upper side area of ​​the landslide body A u and the side slope β on the landslide mass;

[0067] b. Monitor rainfall and obtain the duration and average rainfall intensity of rainfall;

[0068] c. Calculate the early warning discriminant factor P of the landslide according to the formula 1 from the terrain factor and the rainfall factor;

[0069] P=TR 0.67 Formula 1

[0070] Among them, P is the early warning discrimination factor, T is the terrain factor, and R is the rainfall factor;

[0071] d. Use the landslide early warning discrimination factor P to divide the early warning level of rock landslides. When P≥1.85, the possibility is high, and it is a red early warnin...

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Abstract

The invention discloses a red-bed region rock landslide prewarning method and application thereof, and belongs to the technical field of landslide prevention engineering. The prewarning method comprises the following steps: (a) a slope alpha of a landslide mass, an area A of the landslide mass, an upper side area Au of the landslide mass and an upper side surface slope beta of the landslide mass are determined through field surveying and mapping; (b) the rainfall is monitored to obtain the rainfall time and the average rainfall intensity; (c) landslide prewarning judging factors P are calculated according to a formula 1 by terrain factors and rainfall factors; and (d) the rock landslide prewarning grades are divided by the landslide prewarning judging factors P; when P is not lower than 1.85, the possibility is high; when P is not lower than 1.45 and lower than 1.85, the possibility is medium; and when P is lower than 1.45, the possibility is low. The prewarning method deeply researches the terrain conditions and the rainfall conditions formed by the rock landslide, builds precise prewarning calculation models of the rock landslide, determines the prewarning grade of the rock landslide, and greatly improves the prewarning accuracy and applicability.

Description

technical field [0001] The invention relates to the technical field of landslide prevention engineering, in particular to an early warning method and application of rock landslides in red bed areas. Background technique [0002] The red bed is a clastic sedimentary stratum whose appearance is dominated by red. The red bed area is a landslide-prone area. Many landslide disasters often occur during the rainy season, and rock landslides are one of the natural disasters that cannot be ignored. [0003] Rock landslides are a natural phenomenon that occur in mountainous areas or on road slopes. After a rock landslide occurs, the sliding rock mass and its upper surface soil move to the bottom of the hillside or the roadside, silting and impacting nearby residential buildings, factories and other construction facilities, roads, etc., causing great damage. [0004] The occurrence of rock landslides often needs to meet three conditions: one is the terrain conditions that are conduciv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D1/02
CPCE02D1/02
Inventor 余斌马二龙李为乐
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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