Three-dimensional analysis method for stability of toppled rock slope
An analysis method and technology for rock slopes, applied in excavation, special data processing applications, instruments, etc., can solve the problem that the mechanical characteristics and stability characteristics of three-dimensional toppling slope stability analysis cannot be well reflected, and the moment balance is not considered. The problem of large error in calculation results can reduce errors, reduce nonlinearity, and improve reflection.
Pending Publication Date: 2021-01-15
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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However, because the above-mentioned three-dimensional slope stability analysis method does not consider the moment balance, and the moment balance is the key constraint condition to realize the toppling load transfer and balance of the toppling slope, when the moment balance is not considered, the error of the analysis and calculation results of the toppling slope is large, which cannot be obtained. It is a good reflection of the mechanical characteristics and stability characteristics of the three-dimensional dumped slope stability analysis
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[0047] best practice
[0048] In order to make those skilled in the art understand more clearly the three-dimensional analysis method of a kind of toppling rock slope stability provided by the present invention, it will be described in detail below in conjunction with accompanying drawings.
[0049] The invention provides a three-dimensional analysis method for the stability of a toppling rock slope, and the specific implementation methods are as follows:
[0050] In order to calculate the slope safety factor and analyze the different influences of the tensile strength on the slope stability, the embodiment of the present invention adopts the definition of the slope stability safety factor F including the tensile strength, as shown in the following formula (1):
[0051]
[0052] Among them, c is the polygonal interface cohesion (kPa), is the polygon interface cohesion (°), t is the polygon interface tensile strength (kPa), and e is the reduced parameter.
[0053] Such as...
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The invention belongs to the field of rock slope stability analysis, and particularly relates to a three-dimensional analysis method for the stability of a toppled rock slope, which comprises the following steps: defining a toppled body, performing block division on the toppled body, and establishing a block system which comprises at least one block; establishing a force balance equation and a moment balance equation of the block body; constructing a standard optimization model by taking the force balance equation and the moment balance equation of the block body as constraint conditions, andcalculating the slope stability safety coefficient of the toppling body through the standard optimization model. On the basis of a force and moment balance equation, a boundary meeting a yield condition inequality equation is taken as a constraint condition, and the maximum value of a slope stability safety coefficient is taken as a target function, so that three-dimensional analysis of the stability of the toppled rock slope is converted into optimization solution, errors are reduced, and the mechanical characteristics and the stability characteristics of the three-dimensional analysis of thestability of the toppled rock slope can be better reflected.
Description
technical field [0001] The invention relates to the field of rock slope stability analysis, in particular to a three-dimensional analysis method for dumping rock slope stability. Background technique [0002] Toppling failure is a common failure type of rock slopes, which can be divided into primary toppling failure and secondary toppling failure according to the mechanical characteristics of toppling slopes. [0003] In the research on toppling slopes, Goodman and Bray proposed the definition and calculation based on the Block-flexure toppling model in 1976, and then adopted the method of solving the balance equation and introduced the location of the action point or conditional force distribution, etc. It is assumed that the above calculation method based on the Block-flexure toppling model has been improved and developed to simplify the difficulty of solving the balance equation. This is currently the most commonly used calculation method for the stability of toppling slo...
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IPC IPC(8): G06F30/20E02D17/20G06F119/14
CPCG06F30/20E02D17/20G06F2119/14Y02A10/23
Inventor 汪小刚林兴超孙平凌永玉王玉杰赵宇飞张强孙兴松皮进聂勇尹涛孙彦鹏
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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