| 变荷载下双层地基一维非线性固结近似解析解 |
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| 引用本文： | 江留慧,李传勋,杨怡青,张锐.变荷载下双层地基一维非线性固结近似解析解[J].岩土力学,2020,41(5):1583-1590. |
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| 作者姓名： | 江留慧 李传勋 杨怡青 张锐 |
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| 作者单位： | 江苏大学 土木工程与力学学院，江苏 镇江 212013 |
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| 基金项目： | 国家自然科学基金资助项目（No. 51878320）；江苏省博士后科学基金资助项目（No. 1301067B）。 |
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| 摘 要： | 目前考虑土体非线性压缩及渗透特性的双层地基非线性固结解均假定土体固结系数保持不变，能反映固结系数变化的双层地基非线性固结解还很鲜见。引入经典的e- 和e- 非线性关系描述土体的非线性压缩、渗透特性，在假定双层地基上、下土层压缩指数与渗透指数比值 相等且不等于1的基础上，得到变荷载下考虑土体固结系数变化的双层地基一维非线性固结近似解。该解答在 1条件下可退化为已有的 1时双层地基一维非线性固结解。基于此解探讨了双层地基上、下土层参数的相对比值对非线性固结性状的影响。结果表明：单面排水条件下 越小，下层土与上层土的相对压缩性越低、相对渗透性越高，则双层地基非线性固结速率越快；减小 值，增加双层地基中压缩性小、渗透性高的土层的厚度，会加快地基的固结速率。
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| 关 键 词： | 双层地基 非线性固结 固结系数变化 解析解 |
| 收稿时间： | 2019-08-01 |
| 修稿时间： | 2019-09-16 |
Approximate analytical solutions for one-dimensional nonlinear consolidation
of double-layered soil under time-dependent loading |
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| JIANG Liu-hui,LI Chuan-xun,YANG Yi-qing,ZHANG Rui.Approximate analytical solutions for one-dimensional nonlinear consolidation
of double-layered soil under time-dependent loading[J].Rock and Soil Mechanics,2020,41(5):1583-1590. |
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| Authors: | JIANG Liu-hui LI Chuan-xun YANG Yi-qing ZHANG Rui |
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| Institution: | Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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| Abstract: | At present, it is assumed that the consolidation coefficient of the soil remains constant for the nonlinear consolidation solutions of the double-layered soil considering the nonlinear compression and permeability of soil. There are few studies on the nonlinear consolidation solutions of double-layered soil considering the variation of consolidation coefficient. The classical e- and e- nonlinear relationships are introduced to describe the nonlinear compression and permeability characteristics of soil. Based on the assumption that the ratios of compression index and penetration index in both layers are the same and not equal to 1, the approximate solutions for one-dimensional nonlinear consolidation of the double-layered soil are obtained considering the variation of consolidation coefficient and time-dependent loading. Under the condition of 1, the solutions in this study can be degenerated to the existing one-dimensional nonlinear consolidation solutions of double-layered soil when 1. The influence of relative parameter ratios of the lower layer to the upper layer in double-layered soil on the nonlinear consolidation behavior finally is analyzed. The results show that, under the condition of single drainage, the nonlinear consolidation rate of the double-layered soil increases with the decreasing , the reducing relative compressibility, or the increasing relative permeability. When reduces or the thickness of the soil layer with low compressibility and high permeability increases, the consolidation rate of double-layered soil increases. |
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| Keywords: | double-layered soil nonlinear consolidation variation of consolidation coefficient analytical solutions |
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