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| 考虑流变效应的软黏土地基大应变固结研究 | |
| 引用本文： | 谢新宇,李金柱,刘开富.考虑流变效应的软黏土地基大应变固结研究[J].中南大学学报(自然科学版),2011,42(11). |
| 作者姓名： | 谢新宇 李金柱 刘开富 |
| 作者单位： | 1. 浙江大学软弱土与环境土工教育部重点实验室,浙江杭州,310058;浙江理工大学建筑工程学院,浙江杭州,310018 2. 浙江大学软弱土与环境土工教育部重点实验室,浙江杭州,310058 3. 浙江理工大学建筑工程学院,浙江杭州,310018 |
| 基金项目： | 国家自然科学基金资助项目，教育部科学技术研究重点资助项目，浙江省自然科学基金资助项目 |
| 摘 要： | 软黏土压缩性高,在固结过程中变形较大时需要考虑大应变的影响.同时,软黏土具有明显的流变效应,对地基的长期沉降有着重要影响.为此,基于通用有限元软件ABAQUS平台编制土体流变模型UMAT子程序,进行软黏土地基大应变流变固结分析.比较大应变与小应变固结过程中超静孔压消散与沉降发展的差别,并分析模型参数对计算结果的影响.采用半对数经验公式考虑渗透系数随孔隙比的变化,分析渗透指数对固结过程的影响.研究结果表明:大应变固结最终沉降比小应变小,超静孔压消散比小应变快；土体固结对模型中Hooke体弹性模量的变化比Kelvin体弹性模量变化敏感；随着渗透指数的增大,土体固结速率增大. |
| 关 键 词： | 软黏土地基 大应变固结 流变 超静孔压消散 沉降发展 |
Study on large strain consolidation properties of soft soil considering rheological effect |
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| XIE Xin-yu,LI Jin-zhu,LIU Kai-fu.Study on large strain consolidation properties of soft soil considering rheological effect[J].Journal of Central South University:Science and Technology,2011,42(11). | |
| Authors: | XIE Xin-yu LI Jin-zhu LIU Kai-fu |
| Institution: | XIE Xin-yu1,2,LI Jin-zhu1,LIU Kai-fu2 (1.Ministry of Education Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 310058,China,2.College of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou 310018,China) |
| Abstract: | Soft soil often exhibits large settlement during consolidation because of high compressibility,and so the effect of large strain needs considering.Meanwhile,soft soil also has a significant effect of rheology.Therefore,user subroutine of a rheological model was coded on the platform of the FEM software ABAQUS.The study on large strain consolidation of soft soil was performed,based on which the difference of the dissipation of excess pore pressure and the development of settlement between small strain and la... |
| Keywords: | soft soil large strain consolidation rheology pore pressure dissipation settlement development |
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