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Three-dimensional slope stability prediction method

A technology for stability prediction and slope, applied in geophysical surveys, instruments, etc., can solve problems such as unreliable prediction results, unbalanced, missing z-axis moment balance equations, etc., to achieve reliable prediction results, improved calculation accuracy, and reduced The effect of calculation

Active Publication Date: 2013-06-19
CHONGQING UNIV
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Problems solved by technology

The disadvantage of this method is that the z-axis moment balance equation is missing, resulting in an imbalance in this direction, and the prediction results obtained from this are necessarily unreliable

Method used

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  • Three-dimensional slope stability prediction method

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Embodiment

[0099] The three-dimensional landslide body of this embodiment is as figure 2 As shown, the slope surface is an inclined surface, whose inclination angle is 45o; the sliding surface is an ellipsoid sliding surface, and the semi-major axis of the width of the sliding surface in the y direction is 78.35m; Shaft length is 24.4 m. The landslide body is an isotropic homogeneous material, and the soil index parameters are: landslide body cohesion c=29kPa, landslide body friction angle φ=20, landslide body bulk density γ=18.8KN / m 3 .

[0100] Step 1. Express the slip surface and slope surface with equations, such as Figure 4 The three-dimensional slope surface at y=78.35m is shown, that is, the slope surface at the position of the axis of symmetry of the ellipsoid slip surface:

[0101] The slip surface equation is expressed as:

[0102]

[0103] The slope surface equation is expressed as:

[0104]

[0105] Step 2, discretize the three-dimensional landslide body, after d...

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Abstract

The invention relates to a three-dimensional slope stability prediction method. The three-dimensional slope stability prediction method comprises steps as below: step one: selecting a slope body to be specifically predicted and determining the shape of the three-dimensional sliding surface and the geometric dimension of the slope body; the three-dimensional sliding face is divided into a slip surface and a slope surface, and the slip surface and the slope surface are expressed by equations; step two: carrying out discretization of the three-dimensional slip slop body; step three: building an equation set of the prediction of the three-dimensional slope stability, and obtaining the values of the three-dimensional slope stabilization coefficients Fs; step four: judging the stability of the three-dimensional slope according to the critical value of the stability coefficients. The three-dimensional slope stability prediction method has the advantages that calculation accuracy is improved and prediction result is more stable.

Description

technical field [0001] The invention belongs to the technical field of geological disaster prevention and control, and in particular relates to a three-dimensional slope stability prediction method. Background technique [0002] my country is a country with extremely complex terrain and landforms, and it is also a mountainous country, especially in the southwest of my country and Fujian, Guangxi, Guangdong and Hainan along the southeast coast. In the past few hundred years, there have been many large-scale landslide events. Especially with the development of the national economy, a large number of facilities such as railways, highways, water conservancy, mines and towns are built, especially in the construction of hills and mountainous areas, the number of slopes excavated and filled in human engineering activities will increase. more, the height will be bigger and bigger. Geological disasters such as side slopes and landslides have caused huge economic losses and heav...

Claims

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Application Information

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IPC IPC(8): G01V9/00
Inventor 周小平程浩
Owner CHONGQING UNIV
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