DEM simulation of mechanical behaviour of cemented sand under normal distribution of cementation strength

JIANG Ming-jing; LIAO You-bin; LIU Wei; TAN Ya-fei-ou

doi:10.11779/CJGE2016S2001

Volume 38 Issue z2

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Chinese Journal of Geotechnical Engineering > 2016 > 38(z2): 1-6. > DOI: 10.11779/CJGE2016S2001

JIANG Ming-jing, LIAO You-bin, LIU Wei, TAN Ya-fei-ou. DEM simulation of mechanical behaviour of cemented sand under normal distribution of cementation strength[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(z2): 1-6. DOI: 10.11779/CJGE2016S2001

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DEM simulation of mechanical behaviour of cemented sand under normal distribution of cementation strength

JIANG Ming-jing^{1, 2, 3},
LIAO You-bin^{1, 3},
LIU Wei^{2, 3},
TAN Ya-fei-ou^{1, 3}

1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;
2. Key Laboratory of Geotechnical and Underground Engineering Ministry of Education, Tongji University, Shanghai 200092, China;
3. Dept of Geotechnical Engineering, Tongji University, Shanghai 200092, China

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Received Date: May 18, 2016
Published Date: October 19, 2016

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Influenced by construction technology, quality and environment in the construction process of rock-fill concrete gravity dam, natural cementation sands may have different cementation strengths between the sand particles. By using the microscopic model BPM of PFC^3D, the distribution of the bond strength in cemented sand is defined as the normal distribution to study the mechanical properties of cemented soil with different bond strengths. The mechanical properties of cemented sands under different contents and variances are analyzed. The results show the strain softening and shear dilatation characteristics. And with the increase of cement contents, softening and dilatancy increase. When the deviatoric stress reaches the peak value, with the increase of the axial strain, the change of the volume is reduced by the shear contraction. The volumetric strain is changed from the shear shrinkage to dilatancy. With the assumption that the cementing of sample under the normal distribution cementation strength, the peak stress linearly grows with cement content, but charge of the normal distribution variances has a little influence on the cementation of strength.
- cemented sand,
- distinct element method,
- cementation strength,
- mechanical behaviour

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