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Slice method for slope stability analysis based on global optimization

An optimization and stability technology, applied in infrastructure engineering, excavation, construction, etc., can solve problems such as bars that cannot satisfy strict balance equations and safety factors that are not exact solutions

Active Publication Date: 2015-08-12
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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  • Slice method for slope stability analysis based on global optimization
  • Slice method for slope stability analysis based on global optimization
  • Slice method for slope stability analysis 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] Such as 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 body 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 figur...

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Abstract

The invention discloses a slope stability analysis segmentation method based on global optimization, which belongs to the field of slope stability analysis. The invention divides the slope sliding body into vertical blocks or oblique blocks, and divides the bottom surface of the block The force (including normal force, shear force) and the force between the bars (including normal force, shear force) are taken as unknown variables, and the stability safety factor of the slope is used as the objective function, combined with the balance of the bar The nonlinear mathematical programming model for slope stability analysis is established, and the optimization algorithm is used to solve the global optimal maximum stability safety factor. The slope safety coefficient calculated by using the method of the invention has the property of the lower limit solution. The method of the invention has the characteristics of clear concept and high calculation precision, and can be applied to the stability analysis of soil slope or rock slope.

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