Group tension action spherical crown type slope stability evaluation method based on transfer coefficient method

A technology of transfer coefficient and evaluation method, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve problems such as insufficient stability of three-dimensional spherical cap slopes, and achieve the effect of simple calculation process and reasonable calculation results

Inactive Publication Date: 2019-09-20
ZHENGYE ENG & INVESTMENT INC +1
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Problems solved by technology

[0004] In view of the above problems, the technical problem to be solved in the present invention is to provide a method for evaluating the stability of spherical crown slopes under group tension based on the transfer coefficient method, so as to solve the problem of the existing transfer coefficient method in evaluating the stability of three-dimensional spherical crown slopes under group tension. sexual inadequacy

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  • Group tension action spherical crown type slope stability evaluation method based on transfer coefficient method
  • Group tension action spherical crown type slope stability evaluation method based on transfer coefficient method
  • Group tension action spherical crown type slope stability evaluation method based on transfer coefficient method

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Embodiment

[0061] Example: Step 1: Calculation parameters of the three-dimensional model of the spherical crown slope under group tension Figure 4 As shown, it is divided into 10 annular bars, and the sliding mass density of all annular bars is 25kN / m 3 . Sliding surface cohesion c of all annular bars 1i Both are 33kPa, internal friction angle are all 35°; the sliding body cohesion c of all annular bars 2i The same is 33kPa, the internal friction angle The same is 35°. Gravity W of 10 ring bars i and the sliding surface area A 1i , as shown in Table 1; the horizontal and vertical components of each tensile force of each annular bar are 50kN, and the sum of all the tensile forces of each annular bar on the horizontal plane is F xi and the sum of the vertical component force F yi As shown in table 2.

[0062] Table 1 Gravity W of ring bar i and the sliding surface area A 1i

[0063]

[0064]

[0065] Table 2 Ring bar F xi and F yi

[0066] bar number 1 2...

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Abstract

The invention discloses a group tension action spherical crown type slope stability evaluation method based on a transfer coefficient method, and the method comprises the following steps: dividing a spherical crown type slope into a plurality of annular strip blocks, and obtaining Wi and a sliding surface area A1i of each annular strip block; stretching the spherical crown type slope in any direction in the symmetry axis direction to form a section, each annular strip block forming a section on the section, and obtaining the section area A2i and the sliding face inclination angle [theta]i of each annular strip block on the section; iteratively calculating the slope safety factor Fs through the following formula; introducing new assumptions to improve the transfer coefficient method by considering the arch effect of the spherical crown type side slope; meanwhile, adding the group tension into the formula. The improved transfer coefficient method can be used for evaluating the stability of the group tension acting spherical crown type slope, the calculation process is simple, and a method with a more reasonable calculation result is provided for evaluating the stability of the group tension acting spherical crown type slope.

Description

technical field [0001] The invention relates to a slope stability evaluation method, in particular to a spherical crown type slope stability evaluation method based on a transfer coefficient method. Background technique [0002] In mountain engineering construction and landslide disaster prediction and analysis, slopes of various shapes will be encountered. For example, the shape of the slope in the horizontal plane can be divided into convex, concave and linear. The spatial shape of the slope It will undoubtedly affect its stability. Strictly speaking, slope stability analysis is a spatial problem, and the three-dimensional analysis method is more in line with the actual situation. In engineering, the evaluation of slope stability generally adopts the two-dimensional limit equilibrium method. This method is suitable for linear slope calculations. The accuracy is acceptable, but for slopes with significant spatial effects such as spherical crown slopes, the calculation resu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/06G06F30/20
Inventor 沈志平宋二祥徐明吴斌付君宜连江波
Owner ZHENGYE ENG & INVESTMENT INC
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