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Slope stability analysis slice method based on global optimization

An optimization and stability technology, applied in infrastructure engineering, excavation, construction, etc., can solve problems such as the safety factor is not an exact solution, and the block cannot meet the strict equilibrium equation.

Active Publication Date: 2014-01-01
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0012] (1) When the segment method adopts iterative solution, it is necessary to introduce some assumptions to turn the hyperstatic problem into a static problem. The block cannot satisfy the strict balance equation, and the safety factors obtained from the solution are not exact solutions in the true sense

Method used

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  • Slope stability analysis slice method based on global optimization
  • Slope stability analysis slice method based on global optimization
  • Slope stability analysis slice method based on global optimization

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Embodiment 1

[0061] Embodiment 1: Calculation method of slope stability based on global optimization, the specific content is as follows:

[0062] 1. Formulate the calculation parameters of the slope

[0063] like Figure 4 For the slope shown, its sliding surface is a circular arc, its coordinates are shown in the figure, and the soil bulk density is =20kN / m 3 , the shear parameters are: , .

[0064] 2. Divide the slope sliding mass into a series of blocks

[0065] Divide the soil above the sliding surface into 5 vertical strips, the specific division is as follows Figure 5 As shown in , the sliding surface is divided into four equal points of the arc as the middle control point of the sliding surface, and the broken line sliding surface shown in the figure is formed by connecting these control points.

[0066] 3. Establish a slice method nonlinear mathematical programming model for solving slope safety factor

[0067] According to the above parameters combined with figure 2...

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Abstract

The invention discloses a slope stability analysis slice method based on global optimization and belongs to the field of slope stability analysis. The method includes that a slope slip mass is divided into vertical strip blocks or inclined strip blocks, acting force (including normal force and shearing force) on the bottom faces of the strip blocks and acting force (including normal force and shearing force) between the strip blocks are utilized as unknown variables, stable safety coefficient of the slope is utilized as a target function, and a balance equation of the strip blocks, the yield condition of the bottom slip face of the strips blocks, the yield condition of contact face between the strip blocks and other constraint conditions are combined to build a nonlinear mathematical planning model for slope stability analysis, and an optimization algorithm is utilized to solve the global optimum maximum stable safety coefficient. By means of the method, the performance that the slope safety coefficient has a floor solution can be achieved. The method has the advantages of being clear in conception, high in calculation accuracy and the like and can be applied to stability analysis of soil slopes or rock slopes.

Description

technical field [0001] The invention relates to a calculation method for slope stability analysis, in particular to a slice method for slope stability calculation, and belongs to the technical field of slope stability analysis. Background technique [0002] At present, the stability of slopes is a common geotechnical engineering problem in construction projects such as water conservancy and hydropower, highways, railways, and mineral resource development in my country. Slope disasters caused by natural landslides, debris flows, and human engineering activities have brought huge losses to my country's economic construction and people's lives and property. Therefore, the position of slope engineering in various engineering constructions is very important. Correct evaluation of slopes The stability of the system can prevent problems before they happen, and can ensure the safety of production, construction and people's property. [0003] Slope stability analysis is a classic res...

Claims

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Application Information

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IPC IPC(8): E02D17/20
Inventor 李泽魏久坤武亮
Owner KUNMING UNIV OF SCI & TECH
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