Slope progressive failure whole process calculating method

A technology of progressive failure and calculation method, applied in the direction of calculation, special data processing applications, instruments, etc., can solve problems such as difficulty in describing the gradual failure process of slopes, discontinuity of shear stress and shear strain, etc.

Active Publication Date: 2017-03-15
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0002] Most of the stability analysis and progressive failure calculation of slopes use the ideal elastic-plastic model. When the stress reaches the peak stress of this model, there are countless strains, and the frictional resistance is also constant. The characteristics of this model determine that it is difficult to describe the slope. The progressive dest

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  • Slope progressive failure whole process calculating method
  • Slope progressive failure whole process calculating method
  • Slope progressive failure whole process calculating method

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Embodiment Construction

[0104] The present invention will be further described in detail below with reference to the drawings and specific embodiments. The method for calculating the whole process of slope progressive failure provided by the present invention includes the following steps:

[0105] 1. When the sliding body and the sliding surface are of the same material, the principal stress-strain curve test is carried out on the material, and the peak principal stress, strain and curve characteristics of the whole process are obtained by the test. For example, a Chinese patented method for calculating the potential sliding surface of slope progressive failure (application number: 201510658880.6) can be used to determine the physical and mechanical characteristic equations of the sliding material: 1) principal stress-principal strain equation, 2) peak stress equation, 3 ) Critical principal strain equation, 4) Elastic modulus change equation, 5) Softening coefficient equation);

[0106] 1.1, principal s...

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Abstract

The invention provides a slope progressive failure whole process calculating method. The calculating method includes: calculating random stress and strain of a material whole process main stress-strain in the hypothesis that the geological material whole process main stress-strain meets a relevant constitutive relation; acquiring the stress and a strain value in random stress state through coordinate transformation and the characteristic that reversible strain and irreversible strain are irrelevant; generating leftover gliding force due to reduction of frictional resistance of a failure zone in the condition that a slide face failure meets a certain peak stress principle, increasing normal stress a slide body front unit and drive shearing stress along a slide surface, and then causing failures of a slope progressively forward; and determining a relative strain value of both the slide body and a slide bed by calculating the slide body unit strain on the slide surface, and calculating the frictional resistance of a slide surface according to the strain value. The slope progressive failure whole process calculating method can directly calculate the shearing stress and the shearing strain of the slide surface, can avoid deformation coordination hypothesis among blocks, and can calculate the stress and the strain of the slide body.

Description

Technical field [0001] The invention relates to the technical fields of prevention, evaluation, prediction and prediction of civil engineering and geological disasters, foundation pits, anchor rods, anchor cables, and anti-slide piles, and particularly relates to a calculation method for the entire process of slope progressive failure. Background technique [0002] Most of the slope stability analysis and progressive failure calculation use the ideal elastoplastic model. When the stress reaches the peak stress, there are countless strains and constant friction resistance. The characteristics of this model determine that it is difficult to describe the slope. The progressive destruction process. In addition, the shear stress and shear strain of the slope are discontinuous in the post-failure zone along the sliding surface. Traditional numerical methods are difficult to describe its failure characteristics. It is urgent to establish a numerical calculation method to describe the pr...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 崔凯卢应发
Owner SOUTHWEST JIAOTONG UNIV
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