| 变荷载下结构性土一维固结近似解 |
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| 引用本文： | 安然,谢康和,邓岳保,王坤.变荷载下结构性土一维固结近似解[J].岩土力学,2012,33(10):3194-3200. |
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| 作者姓名： | 安然 谢康和 邓岳保 王坤 |
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| 作者单位： | 浙江大学 岩土工程研究所，杭州 310058 |
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| 基金项目： | 国家自然科学资金资助项目(No.50878191) |
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| 摘 要： | 采用简化的k-σ′和mv-σ′分段模型,通过把结构性土一维固结问题转化为上、下层土体厚度不断变化的双层地基一维固结问题,得出了变荷载下结构性土一维固结近似解,并与数值解对比验证了解的合理性。分析结构破坏后渗透系数和体积压缩系数的变化分别对结构性土固结特性的影响表明,在固结系数减小程度相同的情况下,渗透系数减小程度增加则按孔压定义的固结度减小程度加大,而体积压缩系数不断增加则按变形定义的固结度减小程度加大;固结过程中按孔压定义的固结度大于按变形定义的固结度,且随着体积压缩系数增加程度加大,二者的差距加大。
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| 关 键 词： | 变荷载 结构性土 双层土 渗透系数 体积压缩系数 |
| 收稿时间： | 2011-06-17 |
Approximate solution for one-dimensional consolidation of structured soils under time-dependent loading |
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| AN Ran
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XIE Kang-he
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DENG Yue-bao
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WANG Kun.Approximate solution for one-dimensional consolidation of structured soils under time-dependent loading[J].Rock and Soil Mechanics,2012,33(10):3194-3200. |
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| Authors: | AN Ran XIE Kang-he DENG Yue-bao WANG Kun |
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| Institution: | Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China |
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| Abstract: | Using simplified k-σ′and m v-σ′models,the approximate solution for one-dimensional consolidation of structured soils under time-dependent loading is obtained by transforming structured soils into double-layered soils with the gradually changing thickness of the upper and lower layers.The rationality of the approximate solution is verified by compared with a numerical solution.The results indicate that different changes of the permeability coefficient and volume compressibility coefficient of structured soil after failure produce different results.Under a fixed change of the consolidation coefficient,the greater the permeability coefficient decreases,the greater the average consolidation rate in terms of stress decreases,while the greater the coefficient of volume compressibility leads to the greater decrease of the average consolidation rate in terms of deformation;the average consolidation rate in terms of stress is greater than that in terms of deformation;furthermore,the greater increase of the coefficient of volume compressibility yields an increased gap between them. |
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| Keywords: | time-dependent loading structured soils double-layered soils permeability coefficient volume compressibility coefficient |
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