Method for analyzing stability of ribbed slope

An analysis method and stability technology, applied in excavation, construction, infrastructure engineering, etc., can solve problems such as limitations, failure to satisfy force balance and moment balance at the same time, difficulty in accurately evaluating the safety factor and stability of reinforced slopes, etc.

Inactive Publication Date: 2016-02-17
CHANGAN UNIV +2
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Problems solved by technology

[0005] At present, in the technical field of slope stability analysis, most of them focus on the analysis of the natural slope structure, and the reinforced slope is more complex than the natural slope structure. Due to the complexity of its structure, although it is theoretically Some analysis schemes were proposed, such as Rowe and Soderman (1985) extended the simplified Bishop method to make it possible to evaluate the stability of reinforced slopes, but this method only satisfies the moment balance and is only applicable to circular sliding surfaces
Leshchinsky and Boedeker (1989), Jewell (1991), Wright and Duncan (1991), Zornberg et al. (1998) used the limit equilibrium analysis method to carry out the stability analysis of reinforced slopes. In the computational analysis, Leshchinsky and Boedeker (1989) Using logarithmic spiral surface sliding surface, Jewell (1991) using double broken line sliding surface, Wright and Duncan (1991), Zornberg et al. Satisfies force balance and moment balance, and the applicabl...

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  • Method for analyzing stability of ribbed slope
  • Method for analyzing stability of ribbed slope
  • Method for analyzing stability of ribbed slope

Examples

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Embodiment 1

[0113] Embodiment 1: according to the analytical method in the present invention, the factor of safety of the unreinforced slope is calculated, as Figure 10 As shown, the coordinates of the intersection of the force balance curve and the moment balance curve are (0.6597, 1.457), that is, the safety factor of the slope is F=1.457.

Embodiment 2

[0114]Embodiment 2: the tie band is set in the slope, the design value of the tensile strength of the tie band is 20kN / m, and the angle η with the horizontal direction is 0° when the tie band is deformed, and now the tie band provided The active force contributes the least to the anti-skidding of the slope, and the abscissa of the end of the tie bar is 35, and the factor of safety is calculated according to the analysis method in the present invention, as Figure 11 As shown, the coordinates of the intersection of the force balance curve and the moment balance curve are (0.7338, 1.827), that is, the safety factor of the slope is F=1.827.

Embodiment 3

[0115] Embodiment 3: Set the tie bar in the slope, the design value of the tensile strength of the tie bar is 20kN / m, and when the tie bar is staggered and deformed, it is along the direction of the bottom surface of the soil strip, that is, the direction of the reinforcing force and the clamping direction of the horizontal direction Angle η equals the included angle α of soil strip bottom surface and horizontal plane, and the active force that this moment bar plays is maximum for the contribution of slope anti-sliding, and the abscissa of tie bar end is 35, carries out safety factor according to analysis method in the present invention calculation, such as Figure 12 As shown, the coordinates of the intersection of the force balance curve and the moment balance curve are (0.6724, 2.124), that is, the safety factor of the slope is F=2.124.

[0116] It can be seen from Examples 2 and 3 that the safety factor of the reinforced slope when η = α is greater than that of η = 0, but ...

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Abstract

The invention discloses a method for analyzing the stability of a ribbed slope. In the stress analysis of soil stripes, the anti-skid force provided by tie bar strips is added, and the influences of the size and direction of the anti-skid force of the tie bar strips on the soil stripes are taken into consideration. Compared with an existing method for analyzing the stability of a ribbed slope, the method is more comprehensive on the aspect of stress analysis of the soil stripes, the stress of the soil stripes can meet balance equations of force and torque at the same time, and thus the stability of the slope can be more accurately analyzed; and the method is suitable for any sliding face in a circular arc shape and a fold line shape.

Description

technical field [0001] The invention relates to the field of civil engineering slope stability analysis, in particular to a method for analyzing the stability of a reinforced slope. 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 stability analysis of slopes is of great significance to the safety of slope engineering protection. [0003] Slope stability analysis is a classic research field in geotechnical engineering. Many scholars at home and abroad have devoted themselves to research in this area and achieved fruitful results. The most widely used slope stability analysis meth...

Claims

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Application Information

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IPC IPC(8): E02D17/20
Inventor 宋飞孟亚会马立秋张鲁渝张建华陈如意曹更任王凯
Owner CHANGAN UNIV
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