GRANULAR FLOW MODEL OF TRI-AXIAL TEST OF SOIL BASED ON THE MICRO IMAGE TREATMENT TECHNOLOGY

Zhang Bo; Tao Lianjin; Huang Jun; Jin Liang

doi:10.13204/j.gyjz201304018

Volume 43 Issue 4

Dec. 2014

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Zhang Bo, Tao Lianjin, Huang Jun, Jin Liang. GRANULAR FLOW MODEL OF TRI-AXIAL TEST OF SOIL BASED ON THE MICRO IMAGE TREATMENT TECHNOLOGY[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(4): 86-91. doi: 10.13204/j.gyjz201304018

Citation:

Zhang Bo, Tao Lianjin, Huang Jun, Jin Liang. GRANULAR FLOW MODEL OF TRI-AXIAL TEST OF SOIL BASED ON THE MICRO IMAGE TREATMENT TECHNOLOGY[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(4): 86-91. doi: 10.13204/j.gyjz201304018

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GRANULAR FLOW MODEL OF TRI-AXIAL TEST OF SOIL BASED ON THE MICRO IMAGE TREATMENT TECHNOLOGY

doi: 10.13204/j.gyjz201304018

1.
1. Beijing Urban Construction Exploration &Surveying Design Research Institute Co.,Ltd,Beijing 100101,China;
2.
2. Institute of Geotechnical and Underground Engineering;

Received Date: 2012-09-18
Publish Date: 2013-04-20

Abstract

Abstract

Taking silt soil image photographed by scanning electron microscope as the research object, using image treatment technology for microstructure observation and quantitative analysis of soil, the parameters of particle composition of soil were solved, such as porosity, grain diameter, granular shape, which provided physical parameters for setting up granular flow model.And then it was simulated the tri-axial test of the soil and studied the variation rules of property of silt soil with micro-parameters, such as friction coefficient, parallel-bond and stiffness ratio.The result showed that using clump model and particle repulsion method, the granular shape and grain diameter distribution could can be simulated.The model developed by this method fitted the stress-strain curves of soil and simulated the phenomenon of shear contraction and shear dilatation, the influence laws of friction coefficient, parallel-bond and stiffness ratio to the initial modulus and residual strength were different.The development process of shear zone could be reflected by monitoring the change of porosities.
- image treatment,
- PFC,
- silt soil,
- tri-axial test ?

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References(8)

References

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Cundall P A, Strack O D L. The Distinct Element Method as a Tool for Research in Granular Media: Part Ⅱ[R]. Minnesota: University of Minnesota,1979.

[3] 洪宝宁,刘鑫.土体微观结构理论及试验[M].北京:科学出版社,2010.

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[5] 周健,余荣传,贾敏才.基于数字图像技术的砂土模型试验细观参数测量[J].岩土工程学报,2006,28(12):2047-2052.

[6] 周健,池永.土的工程力学性质的颗粒流模拟[J].固体力学学报,2004,25(4):377-382.

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[8] 曾远,周健.砂土的细观参数对宏观性质的模拟研究[J].地下空间与工程学报,2008,4(3):499-503.

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