安然,柴军瑞,覃源,许增光

• 1:西安理工大学

摘要(Abstract)：

针对裸露边坡大量增加导致破坏自然植被、威胁边坡稳定性等问题,以植被护坡的力学效应为重点,采用的经典WU模型对植被根系附加凝聚力进行数值模拟,并在工程常用岩土软件Geo Studio的基础上建立了基于二维有限元方法的植被护坡模型。应用植被护坡模型分析了不同乔木类型以及不同边坡类型对边坡稳定性的影响,对JI模型和ZHANG模型进行模拟计算,验证了模型的可行性。结果表明:无论是直坡还是阶梯状边坡,植被根系都可以提高边坡稳定性,安全系数增量最高可达39.7%。相同附加凝聚力下,Tap型根系对安全系数的提高效果大于Plate型根系。黄土边坡平整为阶梯状后安全系数提高(刺槐坡安全系数增量为8.3%,侧柏坡为8.2%);砂土和粉土的直边坡更稳定。研究成果对植被根系护坡模拟和生态护坡基础建设具有重要的借鉴意义。

关键词(KeyWords)： 边坡稳定;植被护坡;根系形态;生态工程;有限元法;摩尔-库仑强度理论;水土保持与生态环境保护;加筋土理论

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51679197);国家自然科学基金青年基金项目(51409208)

作者(Author): 安然,柴军瑞,覃源,许增光

DOI: 10.13928/j.cnki.wrahe.2018.03.022

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