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An early warning method for shallow soil landslides in red bed areas

A technology for red-bed areas and shallow soil quality, applied in forecasting, alarms, instruments, etc., can solve problems such as low early warning efficiency, poor disaster prevention applicability, and complex early warning work, and achieve high accuracy and improve disaster prevention capabilities. Effect

Inactive Publication Date: 2018-06-29
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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, there are many landslide factors that need to be analyzed, the whole early warning work is complicated, the response is lagging, the early warning efficiency is low, and the applicability of disaster prevention is poor

Method used

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  • An early warning method for shallow soil landslides in red bed areas
  • An early warning method for shallow soil landslides in red bed areas
  • An early warning method for shallow soil landslides in red bed areas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see Figure 1-Figure 3 , a shallow soil landslide early warning method in a red bed area, comprising the following steps:

[0041] a. Taking the landslide and non-landslide in the red layer area as the investigation object, measure the slope α, landslide area A, upper slope β, and upper area A of the landslide and non-landslide u , Lateral left slope θ 1 , Lateral right slope θ 2 , horizontal left area A L , horizontal right area A R and the terrace area A' on the landslide;

[0042] b. Calculate the slope factor S in the terrain factor T that induces shallow soil landslides in the red layer area according to formula 1, calculate the upper side factor U according to formula 2, and calculate the factor C on both sides according to formula 3, and determine the free surface by comparing topographic conditions The factor F is 0.1 if there is a free surface, and 0 if there is no free surface;

[0043] S=tanα (Formula 1)

[0044]

[0045]

[0046] C, according to...

Embodiment 2

[0057] see Figure 1-Figure 3 , a shallow soil landslide early warning method in a red bed area, comprising the following steps:

[0058] a. Taking the landslide and non-landslide in the red layer area as the investigation object, measure the slope α, landslide area A, upper slope β, and upper area A of the landslide and non-landslide u , Lateral left slope θ 1 , Lateral right slope θ 2 , horizontal left area A L , horizontal right area A R and the terrace area A' on the landslide;

[0059] b. Calculate the slope factor S in the terrain factor T that induces shallow soil landslides in the red layer area according to formula 1, calculate the upper side factor U according to formula 2, and calculate the factor C on both sides according to formula 3, and determine the free surface by comparing topographic conditions The factor F is 0.1 if there is a free surface, and 0 if there is no free surface;

[0060] S=tanα (Formula 1)

[0061]

[0062]

[0063] C, according to...

Embodiment 3

[0074] see Figure 1-Figure 3 , a shallow soil landslide early warning method in a red bed area, comprising the following steps:

[0075] a. Taking the landslide and non-landslide in the red layer area as the investigation object, measure the slope α, landslide area A, upper slope β, and upper area A of the landslide and non-landslide u , Lateral left slope θ 1 , Lateral right slope θ 2 , horizontal left area A L , horizontal right area A R and the terrace area A' on the landslide;

[0076] b. Calculate the slope factor S in the terrain factor T that induces shallow soil landslides in the red layer area according to formula 1, calculate the upper side factor U according to formula 2, and calculate the factor C on both sides according to formula 3, and determine the free surface by comparing topographic conditions The factor F is 0.1 if there is a free surface, and 0 if there is no free surface;

[0077] S=tanα (Formula 1)

[0078]

[0079]

[0080] C, according to...

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Abstract

The invention discloses a shallow soil landslide early-warning method in the red-bed area and belongs to the technical field of landslide prevention and control engineering. The method comprises the steps of adopting a landslide mass and a non-landslide mass in the red-bed area as a respondent, measuring a gradients alpha of the landslide mass and the non-landslide mass, an area A of the landslide mass, an upper gradient beta, an upper area Au, a transverse left gradient theta 1, a transverse right gradient theta 2, a transverse left area AL, a transverse right area AR and a terrace area A' on the landslide mass; calculating a gradient factor S, an upper-side factor U, a two-side factor C, a terrain factor T, and a rainfall factor R; calculating a critical value Cr for inducing the shallow soil landslide in the red-bed area and conducting the condition judgment; determining the landslide level, and sending an early-warning signal. According to the technical scheme of the invention, the combined effects of two factors, namely the terrain factor and the rainfall factor, are fully considered to obtain the critical value Cr for inducing the shallow soil landslide mechanism. Therefore, not only the landslide early-warning is high in accuracy, but also the early-warning reaction time is greatly shortened. Therefore, the disaster prevention applicability is improved.

Description

technical field [0001] The invention relates to the technical field of landslide prevention and control engineering, in particular to a shallow soil landslide early warning method based on rainfall time and average rainfall intensity in red layer areas. Background technique [0002] The red bed area is composed of red sandstone, glutenite, siltstone, sandy shale and mudstone, etc. It is a typical layered rock mass, and the rock formations are mostly gentle. Soil landslides in the red bed area are mainly shallow soil landslides. The overlying soil layer on this kind of slope is thin, the rock layer is gently inclined, and large-scale sliding often occurs under heavy rainfall conditions. Shallow soil landslides that slide along the base-cover interface in the red bed area mainly occur in the special area of ​​1-5m. This type of landslide has an important relationship with rainfall infiltration, and the selection of landslide parameters is also related to this mechanism. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/10G06Q10/04
CPCG06Q10/04G08B21/10
Inventor 余斌禹磊
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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