A particle flow numerical simulation method for reflecting the distribution of the real engineering soil-rock mixture

A soil-rock mixture and numerical simulation technology, which is applied in the fields of electrical digital data processing, character and pattern recognition, design optimization/simulation, etc., can solve the problems of discrete test results, long preparation hours, and high cost of on-site testing, and achieve the goal of overcoming the size of the test Limitation, overcoming size constraints, and avoiding the effects of scale effects

Pending Publication Date: 2019-02-19
HEBEI UNIV OF TECH
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Problems solved by technology

Nowadays, field tests are often used in engineering circles to test the mechanical properties of soil-rock mixtures. However, there are two obvious deficiencies in field tests: 1) The specimens are highly disturbing.
The preparation of field test specimens is often achieved by excavation and cutting. When the soil sample contains many irregular stones, potholes are prone to appear during the preparation of the specimen, and it is difficult to form a flat loading surface.
2) The cost is high, the working hours are long, the progress of the project is affected, and the test results are scattered
Due to the long hours of on-site test specimens and test preparation and the need

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  • A particle flow numerical simulation method for reflecting the distribution of the real engineering soil-rock mixture
  • A particle flow numerical simulation method for reflecting the distribution of the real engineering soil-rock mixture
  • A particle flow numerical simulation method for reflecting the distribution of the real engineering soil-rock mixture

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Embodiment Construction

[0029] Specific examples of the present invention are given below. The specific embodiments are only used to further describe the present invention in detail, and do not limit the protection scope of the claims of the present application.

[0030] The invention provides a particle flow numerical simulation method (method for short) reflecting the distribution of real engineering soil-rock mixture, which is characterized in that the method comprises the following steps:

[0031] Step 1. According to the material composition characteristics of the soil-rock mixture on the project site, survey and map the project site. If necessary, dig a test pit, select a representative sampling window, and obtain the soil-rock mixture in the sampling window through frontal photography and size calibration technology. real images (such as figure 1 ); adopt the theoretical formula of the soil-rock boundary particle size to obtain the soil-rock boundary particle size of the soil-rock mixture in ...

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Abstract

The invention discloses a particle flow numerical simulation method for reflecting the distribution of the real engineering soil-rock mixture. The method comprises the following steps: taking photos to obtain the real image of the soil-rock mixture on the project site; using the processing technology to recognize rocks and extract their boundary coordinates; combined with particle sieving and image data, obtaiing the particle size distribution of soil-rock mixture; testing the strength and deformation of soil and rock and deformation parameters.; establishing a numerical model of particle flowin soil-rock mixture; calibrating parameters of particle flow numerical model and carrying numerical tests of mechanical properties of soil-rock mixture specimens. The method is convenient to implement and can be programmed to model intelligently, and can overcome the limitation of test size and meet the requirement of engineering. It is suitable for DEM simulation of binary media such as earth-rock mixture and concrete.

Description

technical field [0001] The invention relates to the field of geotechnical engineering and geological engineering, in particular to a particle flow numerical simulation method reflecting the distribution of real engineering soil-rock mixture. Background technique [0002] Soil-rock mixture is one of the main types of Quaternary sediments on the surface, especially widely distributed in the mountainous areas of western my country, such as common residual deposits, slope deposits and diluvial deposits. In addition, filling works in southwest mountainous areas are very common, such as roads, railway subgrades and airports, etc. The filling materials for filling works are mostly soil-rock mixtures. Because the physical and mechanical properties of rock and soil are very different, and the shapes and sizes of stones in natural soil-rock mixtures are various, and the spatial distribution is also very messy, it is difficult to describe the structural characteristics of soil-rock mix...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06K9/00
CPCG06F2119/06G06F30/20G06V20/13
Inventor 黄达宋宜祥岑夺丰马昊朱谭谭
Owner HEBEI UNIV OF TECH
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