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A method for calculating safety factor of spherical crown slope subjected to tensile force on slope surface

A technology of safety factor and calculation method, which is applied in the field of slope safety factor calculation, can solve the problems of low reliability of calculation results, failure to consider the effect of arching and the effect of slope surface tension, etc., and achieve the effect of improving reliability

Active Publication Date: 2019-02-26
ZHENGYE ENG & INVESTMENT INC
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Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a method for calculating the factor of safety of a spherical crown slope subjected to tension, so as to solve the problem that the traditional limit equilibrium method cannot consider the effect of arching and slope when calculating the factor of safety of a spherical crown slope. The effect of surface tension leads to the problem of low reliability of calculation results

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  • A method for calculating safety factor of spherical crown slope subjected to tensile force on slope surface
  • A method for calculating safety factor of spherical crown slope subjected to tensile force on slope surface
  • A method for calculating safety factor of spherical crown slope subjected to tensile force on slope surface

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Embodiment Construction

[0015] A method for calculating the safety factor of a spherical crown slope subjected to tension on the slope surface, comprising the following steps:

[0016] Step 1: According to the section diagram of the spherical slope provided by the investigation report, select the section with the thickest covering soil of the spherical slope as the most unfavorable section;

[0017] The most unfavorable profile of the spherical crown slope in this embodiment is as follows figure 2 As shown, the slope stratum includes compact block stone and dolomitic limestone;

[0018] Step 2: Rotate the most unfavorable section along the center line to establish a three-dimensional numerical model, and apply tension to the three-dimensional numerical model according to the actual tensile load on the slope. The actual tensile load on the slope can be in any direction;

[0019] This example uses the finite difference numerical analysis software Flac 3D Establish figure 2 The numerical model of t...

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Abstract

The invention discloses a method for calculating safety factor of a spherical crown slope under tension on a slope surface. Firstly, according to a spherical crown slope section provided by a survey report, a section with the thickest overburden thickness of the spherical crown slope is selected as the most unfavorable section. Then the most disadvantageous section is rotated along the centerlineto establish a three-dimensional numerical model, and the tensile stress load in any direction is exerted. Finally, the strength reduction method is used to calculate the safety factor FOS of spherical crown slope. Compared with the traditional limit equilibrium method, the arch effect can be taken into account in calculating the safety factor of spherical crown slope, and the effect of slope tension can also be taken into account, so the reliability of calculation results is greatly improved by establishing three-dimensional numerical model.

Description

technical field [0001] The invention belongs to a method for calculating the safety factor of a slope, in particular to a method for calculating the safety factor of a spherical crown-shaped slope subjected to tension on the slope surface. Background technique [0002] When analyzing natural slopes, the shape of the slope is generally simplified to an infinite long slope, while the spherical crown slope has an arch effect, and its stability is higher than that of a long straight slope. If the long straight side of the traditional limit equilibrium method Considering the slope, taking a two-dimensional section to calculate the safety factor of the slope will lead to a low calculation result of the safety factor, and it is difficult for the traditional limit equilibrium method to consider the effect of tension when calculating the slope safety factor. Numerical analysis methods have obvious advantages in dealing with similar complex slope models. The three-dimensional numerica...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05G06F17/50
CPCG06T17/05G06F2119/06G06F30/23Y02A10/23
Inventor 沈志平陈德茂吴斌付君宜王鸿
Owner ZHENGYE ENG & INVESTMENT INC
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