| 土工格栅加筋拓宽路堤有限元分析 |
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| 引用本文： | 杨涛,杨锦忠,石磊,李国维.土工格栅加筋拓宽路堤有限元分析[J].土木工程学报,2011(Z2). |
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| 作者姓名： | 杨涛 杨锦忠 石磊 李国维 |
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| 作者单位： | 上海理工大学;河海大学岩土工程研究所; |
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| 基金项目： | 广东省交通重点科技项目(200502) |
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| 摘 要： | 采用二维非线性有限元法对软土地基上的拓宽路堤土工格栅加筋作用和效果进行模拟分析。计算中采用一维抗拉单元来模拟土工格栅,采用接触面单元考虑筋土界面的状态非线性。研究土工格栅嵌入老路基长度、格栅设置层数对格栅拉力、拓宽路堤不均匀沉降和水平位移的影响。计算结果表明,格栅嵌入老路基长度越长,拓宽路堤侧向位移和新老路基差异沉降越小,增加格栅层数并不会显著减小拓宽路堤的差异沉降。
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| 关 键 词： | 土工格栅 拓宽路堤 差异沉降 有限元法 |
Finite element analysis of widening embankment reinforced by geogrids |
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| Yang Tao Yang Jinzhong Shi Lei Li Guowei.Finite element analysis of widening embankment reinforced by geogrids[J].China Civil Engineering Journal,2011(Z2). |
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| Authors: | Yang Tao Yang Jinzhong Shi Lei Li Guowei |
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| Affiliation: | Yang Tao1 Yang Jinzhong1 Shi Lei1 Li Guowei2 (1.University of Shanghai for Science and Technology,Shanghai 200093,China,2.Research Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China) |
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| Abstract: | Two-dimensional nonlinear finite element method was used to study reinforcing effect of widened embankment with geogrids over soft soil.Geogrid was modeled by the one-dimensional tension element,the changing-status nonlinearity was considered by the use of the interface element.Numerical analyses were conducted to investigate the effect of the length of geogrids embedded into old embankment,the layer numbers of geogrid on differential settlement and lateral displacement of widened embankment.The result of a... |
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| Keywords: | geogrids widening embankment differential settlement FEM |
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