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Early recognition method for shallow soil landslide

A technology for early identification and shallow soil quality, applied in the field of early identification of shallow soil landslides, can solve the problems of low early identification efficiency of landslides, affecting disaster prevention effects, and complicated early warning work, so as to improve disaster prevention effects and accurate calculation results Reasonable and accurate recognition of the effect

Active Publication Date: 2022-02-11
CHENGDU UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The monitoring and early warning method for shallow landslides disclosed in this patent document needs to monitor indicators such as rainfall, landslide surface displacement, soil volume water content, and pipeline strain of oil and gas pipelines, which makes the early warning work complicated, resulting in low early identification efficiency of landslides, affecting the prevention and control of landslides. disaster effect

Method used

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  • Early recognition method for shallow soil landslide
  • Early recognition method for shallow soil landslide
  • Early recognition method for shallow soil landslide

Examples

Experimental program
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Effect test

Embodiment 1

[0051] An early identification method for shallow soil landslides, comprising the following steps:

[0052] S1. Through the terrain DEM data, according to the contour line of the topographic map, determine the slope with a depression in the cross section, and then determine the two sides of the outer boundary of the landslide from the position of the straight section on both sides or the downward convex section, which is in the middle of the landslide body. Vertical to the bottom boundary, connect a straight line to the middle point that is convex upward along the contour line of the topographic map as the middle line. From the bottom middle line to the top, determine the middle point on the middle line of the middle position of each grid line, each The distance between the middle points is the distance between DEM points. Through the middle point, draw a line parallel to the bottom edge perpendicular to the middle line and intersect with the outer boundary of the landslide. Th...

Embodiment 2

[0076] An early identification method for shallow soil landslides, comprising the following steps:

[0077] S1. Through the terrain DEM data, according to the contour line of the topographic map, determine the slope with a depression in the cross section, and then determine the two sides of the outer boundary of the landslide from the position of the straight section on both sides or the downward convex section, which is in the middle of the landslide body. Vertical to the bottom boundary, connect a straight line to the middle point that is convex upward along the contour line of the topographic map as the middle line. From the bottom middle line to the top, determine the middle point on the middle line of the middle position of each grid line, each The distance between the middle points is the distance between DEM points. Through the middle point, draw a line parallel to the bottom edge perpendicular to the middle line and intersect with the outer boundary of the landslide. Th...

Embodiment 3

[0102] An early identification method for shallow soil landslides, comprising the following steps:

[0103] S1. Through the terrain DEM data, according to the contour line of the topographic map, determine the slope with a depression in the cross section, and then determine the two sides of the outer boundary of the landslide from the position of the straight section on both sides or the downward convex section, which is in the middle of the landslide body. Vertical to the bottom boundary, connect a straight line to the middle point that is convex upward along the contour line of the topographic map as the middle line. From the bottom middle line to the top, determine the middle point on the middle line of the middle position of each grid line, each The distance between the middle points is the distance between DEM points. Through the middle point, draw a line parallel to the bottom edge perpendicular to the middle line and intersect with the outer boundary of the landslide. Th...

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Abstract

The invention discloses an early recognition method for shallow soil landslide, which belongs to the technical field of landslide prevention and control engineering, and is characterized by comprising the following steps of S1, determining a slope with a sunken cross section according to contour lines of a topographic map through topographic DEM data, S2, taking the arithmetic mean value of the gradients of all the middle points as the gradient alpha of the landslide mass, wherein according to a topographic DEM data distribution principle, assignments of all points in each grid are the same, S3, calculating the plane curvature of the middle point of each potential landslide mass through a three-point method, and taking an arithmetic mean value to obtain the plane curvature Q of the potential landslide mass, S4, calculating a topographic factor T of the potential landslide mass, and S5, conducting early recognition of the shallow soil landslide according to the slope alpha of the landslide mass, the plane curvature Q of the potential landslide mass and the topographic factor T. According to the method, the shallow soil landslide is accurately determined and identified in a quantitative manner, the early recognition efficiency of the landslide is improved, and the disaster prevention effect is improved.

Description

technical field [0001] The invention relates to the technical field of landslide prevention engineering, in particular to an early identification method for shallow soil landslides. Background technique [0002] The occurrence of shallow soil landslides often needs to meet three conditions: first, the terrain conditions that are conducive to the occurrence of shallow soil landslides; second, sufficient soil sources, that is, loose covering soil layers; third, abundant rainfall entering the soil. These conditions comprehensively affect and determine the stability of slope soil. Among them, the influencing factors of terrain conditions on shallow soil landslides include: the slope gradient of the potential landslide body, the depression of the cross-section of the landslide body, the topography of the gentle slope on the upper side of the landslide body, and the topography of the lower side of the free surface. In the prior art, the research on topographical conditions for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q50/26G06Q10/04G06F17/18G06F111/10
CPCG06F30/20G06Q50/265G06Q10/04G06F17/18G06F2111/10Y02A10/23G06T17/05G06T17/30G01V1/01G01V20/00G06F16/29
Inventor 李阳春余斌杨凌崴陈文鸿
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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