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Lower limit solution method for two-dimensional limit analysis of slope stability based on block sub-system

A stable and sub-system technology, applied in the direction of instrumentation, geometric CAD, design optimization/simulation, etc., can solve problems such as danger, conservative slope engineering, wrong analysis results, etc., and achieve the effect of reducing impact

Active Publication Date: 2020-12-22
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

However, in some special cases, these assumptions may violate the basic principles of solid mechanics, such as yield criteria and equilibrium conditions, leading to wrong analysis results, leading to wrong judgments by designers, making the designed slope engineering too conservative or partial Danger

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  • Lower limit solution method for two-dimensional limit analysis of slope stability based on block sub-system
  • Lower limit solution method for two-dimensional limit analysis of slope stability based on block sub-system
  • Lower limit solution method for two-dimensional limit analysis of slope stability based on block sub-system

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Embodiment Construction

[0051] Below in conjunction with specific examples, further illustrate the present invention, should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after reading the present invention, those skilled in the art can modify various equivalent forms of the present invention All fall within the scope defined by the appended claims of this application.

[0052] At present, in the field of limit analysis of slope stability in geotechnical engineering, slope stability is mainly analyzed and evaluated by simplified methods such as two-dimensional limit equilibrium method. These different simplification methods correspond to different assumptions, which are reasonable in most cases and can obtain reliable stability analysis results. However, in some special cases, these assumptions may violate the basic principles of solid mechanics, such as yield criteria and equilibrium conditions, lea...

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Abstract

The invention discloses a slope stability two-dimensional limit analysis lower limit solution based on a block separation system, which comprises the following steps: firstly, constructing a two-dimensional block separation model of a slope, and establishing a variable system based on a line segment in combination with the characteristics of a slope rock-soil body material; secondly, deducing an optimization algorithm expression of a slope stability two-dimensional limit analysis lower limit solution based on a two-dimensional block subsystem of the slope and a variable system of a line segment according to a limit lower limit theorem; and finally, solving the slope safety coefficient by optimizing an algorithm expression, and evaluating the slope stability. According to the limit analysis lower limit theorem, any assumption outside the rigid block body is not introduced, the optimal solution is obtained through the optimization method, and the safety and stability of the designed slope are truly and objectively reflected. Besides, the block subsystem designed by the invention can return to the strip subsystem after being simplified, and the block subsystem can consider the effectof the internal boundary of the strip and can adapt to a more complex failure mode.

Description

technical field [0001] The invention relates to a geotechnical engineering slope stability evaluation method, in particular, the invention relates to a two-dimensional limit analysis lower limit solution method of slope stability based on the limit analysis lower limit theorem and based on a block sub-system. The invention belongs to the field of limit analysis of slope stability in geotechnical engineering. Background technique [0002] According to the Chinese Environmental Bulletins over the years, landslide disasters are the main form of geological disasters, and once landslide disasters occur, they will cause huge economic losses to the society. For example: In 2010, there were 30,670 geological disasters across the country, causing 3,449 casualties and direct economic losses of about 6.39 billion yuan. Among them, 22,329 landslide disasters occurred, accounting for about 70% of the total geological disasters. [0003] It can be seen that how to strengthen the stabilit...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20G06F119/14
Inventor 汪小刚林兴超王玉杰赵宇飞孙平段庆伟凌永玉朱贵娜皮进张强孙兴松
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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