| 试样编号 | 模拟工况 | 模拟结果 | |||||
|---|---|---|---|---|---|---|---|
| 土体种类 | 微生物处理时间/d | 胶结半径比例系数η | 孔隙流体压缩系数C | 循环应力比CSR | 破坏振次NL | 破坏模式 | |
| L0 | 净砂 | 0 | 0 | 0.15 | 1 | I.L. | |
| MU2-1 | 非饱和MICP胶结砂土 | 2 | 0.273 | 3.87×10-5 | 0.30 | 45+ | — |
| MU2-6 | 非饱和MICP胶结砂土 | 2 | 0.273 | 3.87×10-5 | 0.60 | 3 | I.L. |
| MP2-2 | MICP胶结砂土 | 2 | 0.273 | 0.60 | 5 | I.L. | |
| US2-4 | 非饱和砂土 | 2 | 3.87×10-5 | 0.30 | 2 | I.L. | |
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Simulation program and main results of cyclic triaxial compression tests on different microbial treatment time on sand
Figures of the Article
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Mechanical responses of contact between particles
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Mechanical responses of bond
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Flow chart of coupled CFD-DEM method
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Grain-size distribution of Ottawa 50-70 sand
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Schematic diagram of sample consolidation
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Loading program for uniform-amplitude cyclic triaxial compression tests
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Cyclic stress ratio-cycles to initial liquefaction curves of sand samples treated by microorganism
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Comparison of liquefaction lines of sand samples under single and combined actions of cementation and bubbles (arrows represents that sample is still intact under this vibration)
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Pore pressure ratios of sand samples under single and combined actions of cementation and bubbles
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Axial strains of samples under single and combined actions of cementation and bubbles
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Mechanical coordination number of samples under single and combined actions of cementation and bubbles
Tables of the Article
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Microscopic parameters of model for bond grains
组成 参数名称 数值 颗粒部分 颗粒模量Ep/Pa 3×108 颗粒法向与切向刚度比 1.5 颗粒摩擦系数 0.5 颗粒抗转动系数 0.2 颗粒局部破损系数 2.1 颗粒法向接触加卸载刚度比 0.95 胶结部分 胶结半径比例系数 (0.5)* 胶结模量Eb/Pa 2×108 胶结泊松比 0.2 胶结抗拉强度 /Pa 1.6×106 胶结抗压强度 /Pa 8×107 黏滞阻尼 法向临界阻尼比 0.6 切向临界阻尼比 0.6 注： 胶结半径比例系数在标定过程中取0.5,在此后的模拟中为控制胶结含量的研究变量。 -
Time-dependent characteristics of microbial processing of numerical simulation samples
反应时间/d 微生物处理生成胶结 微生物处理生成气泡 胶结体积/mm3 胶结半径比例系数η 气泡体积/mm3 饱和度Sr/% 孔隙流体压缩系数C 0 0 0 0 100 4.5×10-7 2 0.718 0.231 2.46 98.3 3.87×10-5 -
Simulation program and main results of cyclic triaxial compression tests on different microbial treatment time on sand
试样编号 模拟工况 模拟结果 土体种类 微生物处理时间/d 胶结半径比例系数η 孔隙流体压缩系数C 循环应力比CSR 破坏振次NL 破坏模式 L0 净砂 0 0 0.15 1 I.L. MU2-1 非饱和MICP胶结砂土 2 0.273 3.87×10-5 0.30 45+ — MU2-6 非饱和MICP胶结砂土 2 0.273 3.87×10-5 0.60 3 I.L. MP2-2 MICP胶结砂土 2 0.273 0.60 5 I.L. US2-4 非饱和砂土 2 3.87×10-5 0.30 2 I.L.
