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Early recognition method of loess shallow landslide and application thereof

An early identification and loess technology, applied in the field of early identification of shallow loess landslides, can solve the problems of complex early warning work, low early warning efficiency, and poor applicability of disaster prevention, and achieve the effect of improving the applicability of disaster prevention and shortening the response time of early warning

Inactive Publication Date: 2017-06-20
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The multi-level comprehensive monitoring and early warning method for landslide disasters disclosed in this patent document requires a large number 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; 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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  • Early recognition method of loess shallow landslide and application thereof
  • Early recognition method of loess shallow landslide and application thereof
  • Early recognition method of loess shallow landslide and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] An early identification method for shallow loess landslides, comprising the following steps:

[0030] a. Determine the basic topographic data of the landslide body through on-site investigation and mapping, the slope of the landslide body α, the area of ​​the landslide body A, the slope of the upper rear edge of the landslide body β, and the area of ​​the upper rear edge of the landslide body A Lu and the slope of the lower free surface γ;

[0031] b. By U=tan(α-β)*(A Lu / A) Calculate the slowing factor U, where β<α;

[0032] c. When γ>α, there is an empty surface, and the terrain comprehensive discrimination factor T of the landslide body is calculated by T=tan(α)+1.25U;

[0033] d. According to the topographic comprehensive discriminant factor T of the landslide body, the hazard level of the shallow loess landslide is divided into three levels: low, medium and high.

[0034] Determine the basic terrain data of the landslide body through on-site investigation and ma...

Embodiment 2

[0036] An early identification method for shallow loess landslides, comprising the following steps:

[0037] a. Determine the basic topographic data of the landslide body through on-site investigation and mapping, the slope of the landslide body α, the area of ​​the landslide body A, the slope of the upper rear edge of the landslide body β, and the area of ​​the upper rear edge of the landslide body A Lu and the slope of the lower free surface γ;

[0038] b. By U=tan(α-β)*(A Lu / A) Calculate the slowing factor U, where β<α;

[0039] c. When γ>α, there is an empty surface, and the terrain comprehensive discrimination factor T of the landslide body is calculated by T=tan(α)+1.25U;

[0040] d. According to the topographic comprehensive discriminant factor T of the landslide body, the hazard level of the shallow loess landslide is divided into three levels: low, medium and high.

[0041] In the step d, three grades means that when βα, and T>1.35, the risk of landslide is high; ...

Embodiment 3

[0044] An early identification method for shallow loess landslides, comprising the following steps:

[0045] a. Determine the basic topographic data of the landslide body through on-site investigation and mapping, the slope of the landslide body α, the area of ​​the landslide body A, the slope of the upper rear edge of the landslide body β, and the area of ​​the upper rear edge of the landslide body A Lu and the slope of the lower free surface γ;

[0046] b. By U=tan(α-β)*(A Lu / A) Calculate the slowing factor U, where β<α;

[0047] c. When γ>α, there is an empty surface, and the terrain comprehensive discrimination factor T of the landslide body is calculated by T=tan(α)+1.25U;

[0048] d. According to the topographic comprehensive discriminant factor T of the landslide body, the hazard level of the shallow loess landslide is divided into three levels: low, medium and high.

[0049] In the step d, three grades means that when βα, and T>1.35, the risk of landslide is high; ...

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Abstract

The invention discloses an early recognition method of a loess shallow landslide and belongs to the technical field of landslide prevention and control engineering. The method comprises the following steps that a, a basic terrain data including the slope of a landslide body alpha, the landslide area A, the upper trailing edge slope of the landslide body beta, the upper trailing edge area of the landslide body A<Lu> and the lower side slope of a free face gamma of the landslide body is determined according to field investigation survey; b, the upper slow factor U is calculated according to U=tan(alpha-beta)*(A<Lu> / A) ,wherein beta<alpha; c, when gamma>alpha, the landslide body has the free face, the terrain synthetic discrimination factor of the landslide body T is calculated through the formula T=tan(alpha)+1.25U; d, the risk grade of the loess shallow landslide is divided into low, medium and high three grades according to terrain synthetic discrimination factor of the landslide body T. The early recognition method of loess shallow landslide and the application can accurately classify the landslide risk in a quantitative way, and identify the early loess shallow landslide without a large amount of historical observation data of the landslide, the early warning reaction time is shortened and the disaster prevention suitability is greatly improved.

Description

technical field [0001] The invention relates to the technical field of landslide prevention engineering, in particular to an early identification method and application of shallow loess landslides. Background technique [0002] The shallow loess landslide is a natural phenomenon that occurs in the loess area. After the shallow soil landslide occurs, the slope soil moves to the bottom of the hillside or the roadside, silts and impacts nearby residential buildings, factories and other construction facilities, or roads, causing great damage. [0003] The occurrence of shallow loess soil landslides often needs to meet three conditions: one is the terrain conditions that are conducive to the occurrence of shallow soil landslides; the other is sufficient soil material sources, that is, loose covering soil layers; the third is abundant rainfall into the soil. These conditions comprehensively affect and determine the stability of slope soil. Among them, the influencing factors of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 余斌赵怀宝李为乐
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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