Annular convex slope stability evaluation method based on simplified Bishop method

An evaluation method and stability technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve the problems of insufficient stability evaluation of annular convex slopes, and achieve the effect of simple calculation process and reasonable calculation results

Active Publication Date: 2019-09-17
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 annular convex slopes based on the simplified Bishop method, so as to solve the shortcomings of the existing two-dimensional limit equilibrium method in evaluating the stability of annular convex slopes.

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  • Annular convex slope stability evaluation method based on simplified Bishop method
  • Annular convex slope stability evaluation method based on simplified Bishop method
  • Annular convex slope stability evaluation method based on simplified Bishop method

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[0046] Example: The method for evaluating the stability of the annular convex slope based on the simplified Bishop method includes the following steps: Step 1: The calculation parameter diagram of the three-dimensional model of the annular convex slope is as follows Figure 4 As shown, it is divided into 10 ring blocks, and the bulk density of the sliding body of all ring blocks is 25kN / m 3 . Cohesion force of sliding surface of all ring blocks c i Both are 33kPa, internal friction angle All are 35°, tensile strength σ of all soil Pull i Both are 32kPa. Gravity W of 10 ring bars i And slip surface area A 1i ,As shown in Table 1.

[0047] Table 1 Gravity W of the ring bar i And slip surface area A 1i

[0048] Bar number 12345 W i (kN)

46125100475141125102275204125 Bar number 678910 W i (kN)

194400192525166150161325117925 Bar number 12345 A 1i (m 2 )

1084884848512912 Bar number 678910 A 1i (m 2 )

81682880010082572

[0049] Step 2: The calculation parameters of the circula...

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Abstract

The invention discloses an annular convex slope stability evaluation method based on a simplified Bishop method, and the method comprises the following steps: dividing an annular convex slope into a plurality of annular strip blocks, and obtaining the gravity Wi and a sliding surface area A1i of each annular strip block; stretching the symmetrical axis of the annular convex slope in any direction to form a section, enabling each annular strip block to form 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; AND iteratively calculating the slope safety factor Fs through the following formula. The contribution of the axial tension of each annular strip block of the annular convex slope to the sliding force is considered; a new assumption is introduced to the simplified Bishop method for improvement, the improved simplified Bishop method can be used for evaluating the stability of the annular convex slope, the calculation process is simple, and a method with a more reasonable calculation result is provided for the stability evaluation of the annular convex slope.

Description

Technical field [0001] The invention relates to a method for evaluating the stability of a side slope, in particular to a method for evaluating the stability of an annular convex slope based on a simplified Bishop method. Background technique [0002] In mountain engineering construction and landslide disaster prediction and analysis, various shapes of slopes will be encountered. For example, the shape of the slope in the horizontal plane can be divided into convex, concave and linear shapes, and the spatial shape of the slope. It will undoubtedly affect its stability. Strictly speaking, slope stability analysis is a spatial issue, and the use of three-dimensional analysis method is more in line with the actual situation. However, the evaluation of slope stability in engineering generally adopts two-dimensional limit equilibrium method. This type of method is used for linear slope calculation. The accuracy is acceptable, but the calculation results of circular convex slopes with...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 沈志平殷跃平闫金凯吴斌付君宜靳颜宁
Owner ZHENGYE ENG & INVESTMENT INC
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