A kind of early warning method of rock landslide with weak interlayer sliding surface and its application
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A technology of weak interlayer and sliding surface, applied in the field of rock landslide prevention and control, can solve the problem of inability to warn other sliding surface landslides, etc., and achieve the effect of ensuring the effect of early warning
Active Publication Date: 2022-04-05
CHENGDU UNIVERSITY OF TECHNOLOGY
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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
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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 Terrain factor T and rainfall factor R are calculated and determined according to formula 1;
[0087] P=TR / G 0.5 Formula 1 ...
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Abstract
The invention discloses an early warning method for rock landslides on weak interlayer sliding surfaces, which belongs to the field of rock landslide prevention and control, and comprises the following steps: a. Soaking the soil samples of the sliding zone in a room, and soaking in water for 24 hours, Measure the friction angle b of the sliding zone soil, determine the slope α of the landslide body, the area of the landslide body A, and the area of the upper side of the landslide body A through on-site investigation and mapping u , slope β of the upper side of the landslide mass; monitor the rainfall to obtain the rainfall duration D and the average rainfall intensity I; c, calculate the comprehensive early warning discrimination factor P of the landslide; Classification of warning levels. The present invention studies the characteristics of the sliding surface, terrain conditions and rainfall conditions formed by the rock landslide on the sliding surface of the weak interlayer, establishes an accurate early warning calculation model for the rock landslide on the sliding surface of the weak interlayer, and analyzes the rock quality of the sliding surface on the weak interlayer. Landslide has a good early warning effect.
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...
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