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A method for evaluating that reliability of homogeneous slope

An evaluation method and reliability technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem that there is no clear convergence coefficient and iteration number selection index, it is difficult to accurately determine the abrupt change point of slope instability, Calculation does not converge and other problems, to achieve the effect of high engineering practical value, avoid the influence of human subjective factors, and simple algorithm

Pending Publication Date: 2019-03-08
NORTHEAST DIANLI UNIVERSITY +1
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Problems solved by technology

The disadvantages of the above instability criteria are: (1) For non-convergent calculation, there is no clear convergence coefficient and iteration number selection index; (2) For the catastrophe criterion, sometimes it is difficult to accurately determine the catastrophe point of slope instability
Literature research shows that the current instability criteria all contain factors of human subjective judgment
At the same time, when RFEM evaluates the reliability of slopes, it is the strength parameters (cohesion c and friction angle ) The mean and standard deviation of the random variable are reduced, the calculation is complex and the efficiency is low

Method used

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  • A method for evaluating that reliability of homogeneous slope
  • A method for evaluating that reliability of homogeneous slope
  • A method for evaluating that reliability of homogeneous slope

Examples

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Embodiment

[0057] Example: Literature (Cho, S.E., 2010. Probabilistic assessment of slope stability that considers the spatial variability of soil properties. Journalofgeotechnical and geoenvironmental engineering 136, 975-984.) and (Li, D.Q., Jiang, S.H., Cao, Z.J., 2015.A Multiple response-surface method for slopereliability analysis considering spatial variability of soilproperties. Engineering Geology 187, 60–72.) The same calculation example is used to study the slope reliability analysis method, and the calculation example is used to verify the feasibility of the algorithm of the present invention. The parameters are shown in Table 1, the slope height H=10.0m, and the slope angle α=45°.

[0058] Table 1 Slope example parameters

[0059]

[0060] First based on the strength parameter c and The mean of , that is μ c = 10kPa and Verify the feasibility of the new strength reduction method instability criterion of the present invention as a deterministic analysis module to calcu...

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Abstract

A method for evaluating that reliability of a homogeneous slope is characterized in that firstly, the lognormal random distribution sample values of cohesion and friction angle of slope soil strengthparameters are determined, the sample value is reduced, the reduced parameters are inputted into the characteristic curve method of slip line field theory to calculate the slope surface curve under the limit state, named as the ultimate stable slope, when the ultimate stable slope surface intersects with the slope surface at the foot of the slope, the slope is judged to be in the ultimate state, and the safety factor corresponding to the logarithmic normal random distribution sample value of cohesive force and friction angle is obtained; and the failure probability of the slope reliability evaluation index is calculated by counting the number of samples whose safety factor is less than 1 and dividing by the total random sample number. The method of the invention does not need to assume andsearch the critical slip surface, and the algorithm is simple and the calculation efficiency is high.

Description

technical field [0001] The invention belongs to the field of slope stability evaluation, and particularly relates to a method for evaluating the reliability of a homogeneous slope. Background technique [0002] Landslide disasters caused by slope instability can cause serious economic losses and casualties. Slope stability evaluation contains a lot of uncertainty. The existing deterministic evaluation methods based on factor of safety (FS) are difficult to express this. kind of uncertainty. [0003] The existing theoretical framework of slope reliability evaluation mainly includes two modules: (1) The first module is to use the deterministic analysis method to calculate the safety factor of the slope. For example, the limit equilibrium method is used to calculate the safety factor, which needs to determine the critical value. Sliding surface, the number of potential sliding surface is generally 10 3 ~10 4 One, it is computationally difficult to consider all potential slip...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 方宏伟吴建勋
Owner NORTHEAST DIANLI UNIVERSITY
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