| 真空-堆载预压处理高速公路软基的有限元计算 |
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| 引用本文： | 刘汉龙,彭劼,陈永辉,郑绍君.真空-堆载预压处理高速公路软基的有限元计算[J].岩土力学,2003,24(6):1029-1033. |
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| 作者姓名： | 刘汉龙 彭劼 陈永辉 郑绍君 |
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| 作者单位： | 1.河海大学 岩土工程研究所，江苏 南京，210098；2. 萧山交通设计室，浙江 萧山，300100 |
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| 摘 要： | 根据高速公路路基的变形特点，提出了真空-堆载联合预压法处理软基的三维Biot固结有限元计算模型，将砂井按照实际尺寸划分单元，避免了平面计算方法中的砂井处理的问题，较以往的平面数值方法更接近实际情况。结合修正剑桥模型，对某真空-堆载联合预压试验段进行了计算、分析，结果令人满意。
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| 关 键 词： | 高速公路 软基 Biot固结 三维有限元 真空-堆载联合预压法 |
| 文章编号： | 1000-7598-(2003)06-1029-05 |
| 收稿时间： | 2002-11-25 |
| 修稿时间： | 2002年11月25 |
Analysis of 3-D Biot consolidation FEM of expressway's soft foundation improved by vacuum combined surcharge preloading |
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| LIU Han-long,PENG Jie,CHEN Yong-hui,ZHENG Shao-jun.Analysis of 3-D Biot consolidation FEM of expressway''''s soft foundation improved by vacuum combined surcharge preloading[J].Rock and Soil Mechanics,2003,24(6):1029-1033. |
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| Authors: | LIU Han-long PENG Jie CHEN Yong-hui ZHENG Shao-jun |
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| Institution: | 1. Geotechnical Institute of Hohai University, NanJing 210098, China; 2. XiaoShan Design Institute of Communication, XiaoShan 3001008, China |
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| Abstract: | According to the deformation character of expressway foundations, a 3-D Biot consolidation FEM model of soft foundation improved by vacuum combined surcharge preloading method, is proposed. This model can discretise PVD element as its actual factor to avoid the problem of PVDs simulation in 2-D FEM. A practical engineering of vacuum combined surcharge preloading is computed and analyzed; and the results are satisfied. |
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| Keywords: | expressway soft foundation Biot consolidation 3-D FEM vacuum combined surcharge preloading |
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