| 刺槐林造林密度对边坡稳定性的影响 |
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| 引用本文： | 刘秀萍,陈丽华,宋维峰,高振林,张超波.刺槐林造林密度对边坡稳定性的影响[J].北京林业大学学报,2008(Z2). |
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| 作者姓名： | 刘秀萍 陈丽华 宋维峰 高振林 张超波 |
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| 作者单位： | 北京林业大学水土保持学院教育部水土保持与荒漠化防治重点实验室;西南林学院环境科学与工程系;北方工业大学建筑工程学院; |
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| 基金项目： | 国家自然科学基金项目(30571531); “973”国家重大基础研究计划项目(2002CB111502) |
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| 摘 要： | 该文通过野外调查和室内试验分析,运用非线性有限元法分析了不同造林密度对刺槐林边坡稳定性的影响。结果表明:刺槐林边坡最大、最小主应力等值线总体上随土体深度的增加而增加,在边坡深层稳定区域位移等值线梯度变化比较均匀,变形主要发生在坡面附近,顺坡和坡顶的浅层边坡不仅具有较大的竖向位移,而且具有较大的水平位移。根系的存在改变了造林边坡应力场的分布,林木根系将表层土体的应力传递到深层,起到弱化浅层土体应力的作用,提高了边坡的稳定性。在边坡顶部和底部适当造林可以减小边坡顶部拉应力区范围和边坡底部剪应力区范围。为了充分发挥根系间土拱的作用,结合研究区气候条件和土壤条件应适当加大造林密度。
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| 关 键 词： | 刺槐 根系 有限元法 边坡 稳定性 |
Impacts of planting density of Robinia pseudoacacia on side slope stability |
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| LIU Xiu-ping ,CHEN Li-hua,SONG Wei-feng,GAO Zhen-lin,ZHANG Chao-bo. Key Laboratory of Soil , Water Conservation & Desertification Combating of Ministry of Education,Beijing Forestry University,P.R.China, Center for Agricultural Resource Research.Impacts of planting density of Robinia pseudoacacia on side slope stability[J].Journal of Beijing Forestry University,2008(Z2). |
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| Authors: | LIU Xiu-ping CHEN Li-hua SONG Wei-feng GAO Zhen-lin ZHANG Chao-bo Key Laboratory of Soil Water Conservation & Desertification Combating of Ministry of Education Beijing Forestry University PRChina Center for Agricultural Resource Research |
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| Institution: | LIU Xiu-ping 1,2,CHEN Li-hua1,SONG Wei-feng3,GAO Zhen-lin4,ZHANG Chao-bo1.1 Key Laboratory of Soil , Water Conservation & Desertification Combating of Ministry of Education,Beijing Forestry University,100083,P.R.China,2 Center for Agricultural Resource Research,Institute of Genetic , Developmental Biology,Chinese Academy of Sciences,Shijiazhuang,050021,3 Department of Environmental Science , Engineering,Southwest Forestry College,Kunming,650224,4 College of Architectural Engineeri... |
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| Abstract: | Based on the field investigation and indoor lab tests,a series of numerical simulations were conducted using the non-linear finite-element method to analyze the influence of slope angle and slope length on the stability of Robinia pseudoacacia forest slope.Results prove that the maximum principal stress isoline of the slope increases with the slope depth.The range of tensile stress on top of the slope is smaller than that of pure soil slope.The tensile stress value and tensile stress range on top of the slo... |
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| Keywords: | Robinia pseudoacacia root system finite-element method(FEM) side slope stability |
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