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Rock landslide early warning method of soft interlayer sliding surface and application thereof

A technology of weak interlayers and sliding surfaces, applied in the field of rock landslide prevention and control, can solve the problems of failure to warn other sliding surface landslides, etc., and achieve the effect of guaranteeing early warning and strong applicability

Active Publication Date: 2019-11-05
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The early warning method for rock landslides in red bed areas disclosed in this patent document describes the early warning model and critical value for rock landslides in red bed areas, but this model can only be used for weak interlayer sliding surfaces in red bed areas, other It is not applicable in the region, and it is not possible to warn of landslides on other sliding surfaces

Method used

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  • Rock landslide early warning method of soft interlayer sliding surface and application thereof
  • Rock landslide early warning method of soft interlayer sliding surface and application thereof
  • Rock landslide early warning method of soft interlayer sliding surface and application thereof

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Effect test

Embodiment 1

[0052] A kind of early warning method of the rock landslide of weak interlayer sliding surface, comprises the following steps:

[0053] a. Through on-site investigation, find the position of the sliding surface of the landslide. After it is determined to be the sliding surface of the weak interlayer, take a sample of the sliding zone soil, and soak the sample in water indoors. , to measure the friction angle of the sliding zone soil

[0054] b. Determine the landslide slope α, landslide area A, and landslide upper side area A through on-site investigation and mapping u , the side slope β on the landslide body; monitor the rainfall to obtain the duration of rainfall D and the average intensity I of rainfall;

[0055] c. Calculate the early warning comprehensive discriminant factor P of the landslide, from the friction angle of the sliding zone soil Terrain factor T and rainfall factor R are calculated and determined according to formula 1;

[0056] P=TR / G 0.5 Formula 1 ...

Embodiment 2

[0083] A kind of early warning method of the rock landslide of weak interlayer sliding surface, comprises the following steps:

[0084] a. Through on-site investigation, find the position of the sliding surface of the landslide. After it is determined to be the sliding surface of the weak interlayer, take a sample of the sliding zone soil, and soak the sample in water indoors. , to measure the friction angle of the sliding zone soil

[0085] b. Determine the landslide slope α, landslide area A, and landslide upper side area A through on-site investigation and mapping u , the side slope β on the landslide body; monitor the rainfall to obtain the duration of rainfall D and the average intensity I of rainfall;

[0086] c. Calculate the early warning comprehensive discriminant factor P of the landslide, from the friction angle of the sliding zone soil Topographic factor T and rainfall factor R are calculated and determined according to formula 1;

[0087] P=TR / G 0.5 Formul...

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Abstract

The invention discloses a rock landslide early warning method of a soft interlayer sliding surface, and belongs to the field of rock landslide prevention and treatment. The method comprises the following steps of a, carrying out water soaking treatment on a sliding strip soil sample in a room, after 24 hours of soaking, measuring the friction angle b of the sliding strip soil, and determining thegradient alpha of the landslide body, the area A of the landslide body, the upper side area Au of the landslide body and the upper side surface gradient beta of the landslide through field investigation and mapping; monitoring rainfall to obtain rainfall duration D and rainfall average intensity I; c, calculating an early warning comprehensive judgment factor P of the landslide; and d, adopting the early warning comprehensive judgment factor P for dividing the early warning grades of the rock landslide on the sliding surface of the soft interlayer. According to the method, the sliding surfacecharacteristics, the terrain conditions and the rainfall conditions of the rock landslide formed by the soft interlayer sliding surface are researched, and an accurate early warning calculation modelof the rock landslide of the soft interlayer sliding surface is established, so that a good early warning effect is achieved on the rock landslide of the soft interlayer sliding surface.

Description

technical field [0001] The invention relates to the technical field of prevention and control of rock landslides, in particular to an early warning method for rock landslides on weak interlayer sliding surfaces and an application thereof. Background technique [0002] According to the material composition, origin, nature and failure mode of the sliding surface of the rock slide, the sliding surface of the rock slide can be divided into the sliding surface of weak interlayer, the sliding surface of rock layer and the sliding surface of joint surface. The sliding surface of the weak interlayer is straight and smooth, with high content of clay minerals and poor bonding. Analyzing the reason for the formation of the sliding surface, the sliding surface of the weak interlayer is formed under the combined action of diagenesis, structure and supergenesis. [0003] Landslides on weak interlayer sliding surfaces are prone to landslides, and many landslide disasters often occur in th...

Claims

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Application Information

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IPC IPC(8): G01N33/24E02D17/20
CPCG01N33/24E02D17/20
Inventor 余斌马二龙李阳春
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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