根系生态护坡的有限元分析

›› 2011, Vol. 32 ›› Issue (6): 1881-1885.

根系生态护坡的有限元分析

肖本林^{1, 3}，罗寿龙²，陈军²，邓友生³，郑建强³

1. 中南大学信息物理工程学院，长沙 410083；2. 湖北省三峡翻坝高速公路建设指挥部，湖北宜昌 443002； 3. 湖北工业大学土木工程与建筑学院，武汉 430068

收稿日期:2010-05-25 出版日期:2011-06-10 发布日期:2011-06-21
作者简介:肖本林，男，1962年生，博士研究生，教授，从事土木工程健康监测和防灾减灾方面的研究
基金资助:
交通运输部行业攻关项目资助（No. 2008353342310）；湖北省教育厅重点项目资助（No. D20091405）

Finite element analysis of eco-protection slope through roots

XIAO Ben-lin^{1, 3}, LUO Shou-long², CHEN Jun², DENG You-sheng³, ZHENG Jian-qiang³

1. School of Info-physical and Geometric Engineering, Central South University; Changsha 410083 China; 2. Hubei Provincial Construction Headquarters for Highway Turning the Three Gorges Dam, Yichang, Hubei 443002, China; 3. School of Civil Engineering & Architecture, Hubei University of Technology, Wuhan 430068, China

Received:2010-05-25 Online:2011-06-10 Published:2011-06-21

摘要/Abstract

摘要： 生态护坡是公路建设可持续发展的要求。根据林木根系对边坡浅层加筋锚固的原理，结合现场提取刺槐根系进行试验所得的基本参数，利用有限元软件ADINA进行分析。在模拟分析过程中，根系采用弹性杆件模型，土体采用摩尔-库仑模型，从坡度的变化对整个刺槐林边坡进行模拟计算，对其应力和应变场的变化进行分析。研究结果表明，刺槐群根能改善边坡浅层土体的应力、应变场，使坡体浅层更趋稳定；边坡坡度的增加会导致坡脚应力增大、坡肩处逐渐产生拉应力及其数值逐渐增大、应变集中区的范围也扩大，此时根系护坡效果减弱

关键词: 有限元法, 根系固土, 坡度, ADINA

Abstract: Eco-protection slope is the sustainable development of highway construction. Forest roots can reinforce and anchor surface soil of slopes. The finite elements software ADINA is used to analyze mechanism of eco-protection slope through robinia pseudoacacia roots in different slope gradients. Tests are carried out to gain basic parameters through roots at field sites. During simulation, soil model is Mohr-Coulomb, and roots model is elastic bar. The results show that robinia pseudoacacia roots group in slope can make the upper layer of slope soil more stable by changing its stress and strain fields. As the slope gradient increases, the stress in the bottom of slope would increase and concentration area of strain would expand, while tensile stress would produce at the slope shoulder and its value would increase also; in this case, the effect of roots reinforcing slope would decrease.

Key words: finite element method, soil reinforced by roots, slope gradient, ADINA

中图分类号:

TB115

肖本林，罗寿龙，陈军，邓友生，郑建强. 根系生态护坡的有限元分析[J]. , 2011, 32(6): 1881-1885.

XIAO Ben-lin , LUO Shou-long , CHEN Jun , DENG You-sheng , ZHENG Jian-qiang. Finite element analysis of eco-protection slope through roots[J]. , 2011, 32(6): 1881-1885.

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