| 根对土壤加强作用的研究 |
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| 引用本文： | 杨璞,向志海,胡夏嵩,李国荣,朱海丽,毛小青,岑章志.根对土壤加强作用的研究[J].清华大学学报(自然科学版),2009(2). |
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| 作者姓名： | 杨璞 向志海 胡夏嵩 李国荣 朱海丽 毛小青 岑章志 |
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| 作者单位： | 清华大学工程力学系;青海大学地质系; |
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| 基金项目： | 新世纪优秀人才支持计划NCET-04-G983 |
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| 摘 要： | 为研究植被根系对边坡稳定和水土保持的作用,该文通过根土复合体的三轴实验分析了根对土体的加强作用,得到了含根体积比为0.5%和1%的根土复合体在10 kPa围压下的轴压极限载荷。同时使用基于周期性复合材料的均匀化理论,建立了根土复合材料胞元的数值计算模型。利用该模型,对两种含根体积比情况下的轴压极限载荷进行了数值计算,其结果和实验比较吻合。该文实验在青海进行,研究结果为将来治理青海水土保持问题提供了数据基础。
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| 关 键 词： | 极限载荷 根土复合材料 均匀化理论 界面单元 |
Soil reinforcement by vegetation roots |
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| YANG Pu,XIANG Zhihai,HU Xiasong,LI Guorong,ZHU Haili,MAO Xiaoqing,CEN Zhangzhi.Soil reinforcement by vegetation roots[J].Journal of Tsinghua University(Science and Technology),2009(2). |
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| Authors: | YANG Pu XIANG Zhihai HU Xiasong LI Guorong ZHU Haili MAO Xiaoqing CEN Zhangzhi |
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| Institution: | 1.Department of Engineering Mechanics;Tsinghua University;Beijing 100084;China;2.Department of Geological Engineering;Qinghai University;Xining 810016;China |
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| Abstract: | The soil reinforcement by roots was studied through triaxial tests of soil-root composites to explain the role of vegetation roots in slope enhancement and soil-water conservation.Axial limit loads were measured for 0.5% and 1% fiber volume ratio of the soil-root composites subjected to 10 kPa lateral pressures.Simulations conducted using a representative volume element for soil-root composites based on the homogeneous theory and a modified interface element agree well with the experimental data.These exper... |
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| Keywords: | limit loads soil-root composites homogenization theory interface element |
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