Method for evaluating slope stability of bent toppled rock mass with large bending degree

A bending degree, stability technology

Active Publication Date: 2021-08-13
ZHEJIANG UNIV
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Problems solved by technology

However, it cannot accurately analyze toppled slopes with large degrees of curvature due to the assumption of linear rock formations

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  • Method for evaluating slope stability of bent toppled rock mass with large bending degree
  • Method for evaluating slope stability of bent toppled rock mass with large bending degree
  • Method for evaluating slope stability of bent toppled rock mass with large bending degree

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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings. The following specific implementation steps can enable those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention in any form.

[0050] The method for evaluating the stability of a curved toppling rock mass slope with a large degree of curvature according to the present invention comprises the following steps:

[0051] 1. Obtain rock formation parameters: Obtain the density, elastic modulus, tensile strength, shear strength, friction angle between rock layers, and friction angle between rock layers and the basement of slope rocks through measurements and experiments; figure 1 As shown in , draw a common vertical line of all rock formations and use it as the assumed failure surface of the rock formations. Assuming that the central axis of all rock formations is an arc and the center of the arc is lo...

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Abstract

The invention relates to the field of rock mass slope stability evaluation, and aims to provide a method for evaluating the slope stability of a bent toppled rock mass with a large bending degree. The method comprises the steps of (1) acquiring rock stratum parameters of a stratified rock slope; (2) dividing a free bending area and a coordinated bending area; (3) testing the stability of the free bending area; (4) calculating the interaction force between rock stratums of the coordinated bending area; and (5) judging the stability of the slope toe rock stratum and the whole slope. Due to the fact that the bending degree of the rock stratum of the large-deformation toppled slope is close to the arc shape, on the basis of a traditional linear cantilever beam method, the rock stratum is assumed to be in the arc shape, the limitation of the cantilever beam method is improved, and the large-bending-degree toppled slope can be evaluated. Due to the fact that the formula is simple and clear and the number of required rock parameters is small, the method is short in time consumption and low in cost; the calculation is objective, and manual parameter setting is not needed; and the stability of the bent toppled slope with a large bending degree can be accurately calculated.

Description

technical field [0001] The invention relates to the field of stability evaluation of rock mass slopes, in particular to an evaluation method for the stability of curved toppling rock mass slopes with a large degree of curvature. Background technique [0002] Bending toppling is a special deformation and instability mode of layered rock slope, which is specifically manifested as a series of superimposed rock layers bending toward the free surface without cracking. Once the curved toppled slope loses stability, it will lead to rock landslides, so it is of great significance to analyze the stability of curved toppled rock mass. [0003] At present, the deformation and instability mechanism of curved toppling slopes are mainly studied by three methods: physical experiment, numerical simulation and cantilever beam method. Through physical experiments on typical overturned slopes, many valuable discoveries have been obtained. For example, the failure surface of a curved toppled s...

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Application Information

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IPC IPC(8): G01N3/20G01N3/24G01N3/08
CPCG01N3/20G01N3/24G01N3/08G01N2203/0003G01N2203/0017G01N2203/0023G01N2203/0025G01N2203/0067
Inventor 郑俊王炯超吕庆田哲祺黄伟民郭吉超
Owner ZHEJIANG UNIV
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