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Failure criterion for homogeneous slope stability strength reduction method

A technology of strength reduction and stability, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of long time consumption, achieve good results, avoid the influence of human factors, and reduce the operation time.

Active Publication Date: 2017-06-20
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology

When applying the strength reduction method to calculate the safety factor of the slope and determine the critical slip surface, the process is an iterative process due to the continuous reduction of the strength parameters, so it takes a long time compared to other methods

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  • Failure criterion for homogeneous slope stability strength reduction method
  • Failure criterion for homogeneous slope stability strength reduction method
  • Failure criterion for homogeneous slope stability strength reduction method

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Embodiment Construction

[0046] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0047] A kind of homogeneous slope stability strength reduction method instability criterion of the present invention comprises the following contents:

[0048] 1) Calculate the safety factor:

[0049] (1) Firstly, the strength parameter is reduced by the formula (1),

[0050]

[0051] In the formula, c is the cohesive force, is the friction angle, F i is the reduction factor, i is a natural number;

[0052] (2) To calculate the slip line field, set the top of the slope as the origin of the coordinates, one side of the slope is the positive semi-axis of the x-axis, and the downward is the positive semi-axis of the y-axis,

[0053] M α (x α , y α , θ α , σ α ) is a point on the slip line of the α family, M β (x β , y β , θ β , σ β ) is a point on the slip line of the β family, and the reduced strength parameter c i...

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Abstract

The invention provides a failure criterion for a homogeneous slope stability strength reduction method. The failure criterion is characterized in that a slope is judged as under an ultimate balancing state through a continuous strength reduction parameter, namely, cohesive force c and frictional angle tangent value, when a slope curve and a slope planer line under the ultimate state calculated according to a sliding line field theory are intersected at a slope toe; and meanwhile, the reduction coefficient is a safety coefficient, and then the reduced strength parameter and the slope geometric and boundary conditions are substituted into a finite difference method and a critical slip surface is confirmed through the calculated maximal plastic strain cut-through zone. The failure criterion provides a new analysis method for evaluating the slope stability and has the advantages of being scientific and reasonable, high in practical value in engineering and excellent in effect.

Description

technical field [0001] The invention belongs to the field of slope stability evaluation, and in particular relates to an instability criterion of a homogeneous slope stability strength reduction method. Background technique [0002] Landslide disasters directly affect the national economy, social sustainable development and all aspects of people's lives, and will cause serious loss of life and property. Slope stability evaluation is the main basis for judging whether landslide disasters occur, whether reinforcement is needed, and what prevention measures to take. Therefore, the study of slope stability analysis methods is a research topic with great theoretical value and important practical significance. The strength reduction method developed in recent years makes the slope reach the limit equilibrium state by continuously reducing the rock-soil strength parameters, so as to directly calculate the sliding surface position and the slope strength reserve safety factor, becaus...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 方宏伟
Owner NORTHEAST DIANLI UNIVERSITY
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