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| Particle flow simulation for effects of rock block shape on mechanical behavior of soil-rock mixture |
| Received:May 06, 2015 Revised:September 16, 2015 |
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| DOI：10.7511/jslx201605015 |
| KeyWord:soil-rock mixture particle flow code rock block shape rock block proportion meso-mechanisms |
| Author | Institution |
| 金磊 |
武汉大学 土木建筑工程学院, 武汉 |
| 曾亚武 |
武汉大学 土木建筑工程学院, 武汉 |
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| Abstract: |
| In order to explore the meso-mechanisms of effects of rock block shape on mechanical behavior of soil-rock mixture (SRM),spherical,cubic and cuboid-shaped rock blocks are taken into consideration.SRM with cubic rock blocks are compared with that of spherical rock blocks to explore the effects of block angularity.SRM with cuboid-shaped rock blocks are compared with that of cubic rock blocks to explore the effects of block sphericity.Firstly,a 3D DEM refined modeling method for specific rock block shape was developed.Then,particle flow numerical models of SRM with 30% and 80% rock block proportion (RBP) were established,whose block shape is spherical,cubic and cuboid-shaped respec-tively.Then,particle flow simulation for large scale triaxial tests of SRM was conducted to obtain strength and deformation characteristics of SRM with different rock block shape and RBP.Finally,meso-mechanisms of effects of rock block shape on mechanical behavior of SRM were intensively analyzed.The results show that rock block shape affect the mechanical behavior of SRM and the degree of influence are closely related to RBP.The evolution of coordination number,mean rotation of rock blocks and frictional work can well reflect the meso-mechanisms of effects of rock block shape. |
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