Three-dimensional slope stability prediction method under earthquake load effect

A technology of stability prediction and seismic load, applied in seismology, geophysical measurement, measurement device, etc., can solve the problems of inability to reflect the dynamic effect of earthquake on three-dimensional slope, ignore the dynamic force effect of seismic load, etc., and achieve reliable prediction results. , the effect of reducing the amount of calculation and improving the calculation accuracy

Active Publication Date: 2013-06-05
CHONGQING UNIV
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Problems solved by technology

Although in the past one hundred years, people have made considerable progress in the research of numerical methods for slope stability, the intelligent prediction method of 3D slope stability under seismic loads is still insufficient.
[0003] Under the action of seismic load, the three-dimensional slope should be a process of kinetic force, but in the previous stability analysis methods of slope engineering, the seismic load was only considered as a static force, which undoubtedly ignored the seismic load The kinematic force effect of , and th

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  • Three-dimensional slope stability prediction method under earthquake load effect
  • Three-dimensional slope stability prediction method under earthquake load effect
  • Three-dimensional slope stability prediction method under earthquake load effect

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Embodiment

[0113] The three-dimensional landslide body of this embodiment is as figure 2 As shown, the slope surface is an inclined surface, and its inclination angle is taken as 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 20m; the semi-major axis in the x and z directions The length is 20m. The landslide body is an isotropic homogeneous material, and the soil index parameters are: landslide body cohesion c=30kPa, landslide body friction angle φ=30°, landslide body bulk density γ=22KN / m 3 . Poisson's ratio μ=0.3, the amplification factor of seismic wave in rock and soil material is f=1.2, the period of seismic wave is T=0.2s, and the propagation speed of transverse and longitudinal seismic wave in rock and soil material is v s =100m / s, and v p =106.9045 The seismic acceleration coefficients in the horizontal and vertical directions are kh=0.2 and kv=0.1 respectively.

[0114] Step 1. Expr...

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Abstract

The invention relates to three-dimensional slope stability prediction method under an earthquake load effect. The method comprises the following steps. Firstly, a specific to-be-predicted slope body is chosen, the three-dimensional sliding surface shape and the geometric dimension are confirmed, three-dimensional surfaces are divided into a slip surface and a side slope surface, and the slip surface and the side slope surface are shown with equations. Secondly, discretization is performed on the three-dimensional slope body. Thirdly, a predicated equation set of three-dimensional slope stability with consideration of the earthquake load effect is set, and last data of a three-dimensional slope stability coefficient is obtained through the equation set. Fourthly, whether the stability coefficient is larger than a set slope stability critical value or not is judged based on the last condition of the stability coefficient and by searching the most disadvantageous condition of the slope under the earthquake load effect. The three-dimensional slope stability prediction method under the earthquake load effect has the advantages that a dynamic effect of earthquake load in a slope engineering is considered, calculation precision is improved, and a predicted result is reliable.

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 under the action of earthquake load. 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 caus...

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Application Information

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IPC IPC(8): G01V1/00
Inventor 周小平程浩
Owner CHONGQING UNIV
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