| 狗牙根根系形态对边坡稳定性的影响 |
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| 引用本文： | 嵇晓雷,杨平.狗牙根根系形态对边坡稳定性的影响[J].福建农业大学学报,2013(5):531-535. |
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| 作者姓名： | 嵇晓雷 杨平 |
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| 作者单位： | [1]南京林业大学土木工程学院,江苏南京210037 [2]江苏广播电视大学建筑工程系,江苏南京210036 |
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| 基金项目： | 教育部博士点基金资助项目（200802980005）;江苏省高校优势学科建设工程资助项目. |
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| 摘 要： | 基于野外调查和室内试验，将根土复合体看作由土体、根系所联系起来的有机体，运用非线性有限元计算方法分析在雨水侵蚀力和坡面径流侵蚀力作用下，狗牙根根系须根数量和长度对边坡表层土体稳定性的影响．结果表明：根系的存在能有效提高边坡表层土体整体稳定性，边坡表层总应力和水平应力随着狗牙根须根数量的增多和须根长度的增大而逐渐增大，边坡土体水平位移量、竖向位移量、总位移量随着狗牙根须根数量的增多和须根长度的增大而逐渐减小．因此，选择合适根系分布形态的护坡植物对稳定边坡表层土体具有十分重要的意义．
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| 关 键 词： | 根系形态 有限元分析法 稳定性 位移 |
Effects of roots of bermuda grass on the stability of slopes |
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| JI Xiao-lei,YANG Ping.Effects of roots of bermuda grass on the stability of slopes[J].Journal of Fujian Agricultural University,2013(5):531-535. |
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| Authors: | JI Xiao-lei YANG Ping |
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| Institution: | 1. College of Civil Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; 2. Department of Construction Engineering, Jiangsu Radio and TV University, Nanjing, Jiangsu 210036, China) |
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| Abstract: | On the basis of field investigation and laboratory experiments, the root-soil composite was regarded as an integrated organism of soil and roots, and the effects of the amount and length of fibrous roots of bermuda grass on the stability of surface soil of steep slopes were studied by non-linear finite numerical analytical method under the condition of rainfall and slope-surface runoff erosions. The result showed that the existence of roots could substantially enhance the integral stability. With the increase of the amount and length of fibrous roots, the total stress and horizontal stress of slope surface increased while horizontal displacement, vertical displacement and total displacement decreased. Therefore, selecting a plant with appropriate root forms had great significance for the stability of surface soil of slopes. |
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| Keywords: | root form finite numerical analytical method stability displacement |
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