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Slope stability prediction method for realizing LS-SVM model based on Excel computing platform

A LS-SVM model and stability prediction technology, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the basic knowledge of slope failure mechanics and numerical programming and other problems, to achieve a wide range of applications, easy to implement, simple to operate Effect

Active Publication Date: 2019-08-09
HOHAI UNIV
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Problems solved by technology

[0004] Existing slope predictions use MATLAB and other software for modeling analysis and intensive calculations, which require certain basic knowledge of slope failure mechanics and experience in numerical programming. Therefore, the development of proxy models for slope stability prediction meets engineering needs

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  • Slope stability prediction method for realizing LS-SVM model based on Excel computing platform
  • Slope stability prediction method for realizing LS-SVM model based on Excel computing platform
  • Slope stability prediction method for realizing LS-SVM model based on Excel computing platform

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specific Embodiment

[0037] Below in conjunction with specific embodiment, technical solution of the present invention is described in further detail:

[0038] A kind of slope stability prediction method that realizes LS-SVM model based on the Excel computing platform of the present invention, comprises the following steps:

[0039] Step 1, first select a two-layer undrained soil slope instance such as figure 1 As shown, among them, the statistical information of uncertain soil layer parameters: cohesive soil layer-1C u1 (kPa)~Lognormal(120,36), cohesive soil layer-2C u2 (kPa) ~ Lognormal (160,48). The undrained strength C of the two soil layers u1 and C u2 All obey the standard normal distribution, and the cohesion C of the known point of the slope u1 、C u2 The safety factor Fs calculated by the Spencer method is used as the training set (100 groups) and the test set (30 groups) respectively, and is input into Excel in the same format.

[0040] Step 2, for the input undrained strength C u...

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Abstract

The invention discloses a slope stability prediction method for realizing an LS-SVM model based on an Excel computing platform, which comprises the following steps that firstly, a slope to be tested is selected, soil property parameters of a slope soil body are obtained from existing data and known data, and the safety coefficient of the slope is calculated through slope stability numerical analysis software; secondly, the parameters are input into an Excel form according to a column sequence after being subjected to standardization processing; then, the compiled VBA background program is called to train the LS-SVM model and carrying out prediction; and finally, the stability of the side slope is judged according to the predicted safety coefficient. According to the method, the LS-SVM is realized on an Excel platform, the method is convenient to operate, simple and easy to learn and high in calculation efficiency and precision, fits the engineering practice, and provides an important basis for various actual slope designs and safety prediction.

Description

technical field [0001] The invention relates to a method for predicting slope stability based on an Excel computing platform to realize an LS-SVM model, and belongs to the field of slope reliability. Background technique [0002] Slope stability assessment is an important part of geotechnical engineering design. The factor of safety (Fs) based on soil properties and slope characteristics is an important index for quantitatively evaluating slope stability. The safety factor is defined as the ratio of the anti-sliding force to the sliding force. When the safety factor is greater than 1, the slope is in a stable state; when the safety factor is less than 1, the slope has a certain probability of failure and instability. The size of the safety factor can effectively reflect the stability of a certain slope. [0003] The safety factor of a certain slope can be calculated by traditional numerical methods such as limit equilibrium method and finite element method, but it requires...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 姬建张哲铭高玉峰王晨玮郭洁涛
Owner HOHAI UNIV