植物根系护坡的有限元数值分析  

On Finite Element Analysis of Slope Protection Based on Plant Roots

作　　者：李雪尔 谢春燕[1] 李岩[1] 郑力 吴达科[1] 杨明金[1] LI Xue-er;XIE Chun-yan;LI Yan;ZHENG Li;WU Da-ke;YANG Ming-jin(College of Engineering and Technology,Southwest University,Chongqing 400716,China)

机构地区：[1]西南大学工程技术学院,重庆400716

出　　处：《西南师范大学学报（自然科学版）》2018年第2期76-82,共7页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：重庆市民生一般项目(cstc2016shmszx80001;cstc2016shmszx80037);中央高校基金科研业务费项目(XDJK2013B014)

摘　　要：利用植物的根系来固土、护坡在国内外很多项目中都有应用,但是理论的支持还比较匮乏.为了进一步完善植物根系护坡的理论依据,深化有限元强度折减法在根系护坡领域的运用,以刺槐和油松根系为研究对象,把根系和土体结合在一起,通过有限元强度折减法模拟得到边坡的滑动面和稳定性安全系数.研究发现有林边坡的安全系数高于无林边坡,且安全系数高出了7%~18%左右.研究表明:选择适当的植物和植物密度更利于护坡,这为指导植物根系护坡提供了理论依据.The use of plant roots to soil slope protection in many domestic and foreign projects have application,but the theoretical support is still relatively scarce.In order to improve further the theoretical basis of plant root revetment and to deepen the application of finite element strength reduction method in the field of root slope protection,the root system of Robinia pseudoacacia and Chinese Pines,and the relationship between root system and soil have been studied in this paper.Finally,the sliding surface and the stability safety factor of the slope have been obtained by the finite element strength reduction method.The results show that the safety factor of root slope is higher than that of non-root slope,and the safety coefficient is increased by 7%to 18%.And the study shows that choosing the appropriate plant and plant density is more beneficial to slope protection,which provides a theoretical basis for guiding plant root slope protection.

关 键 词：边坡稳定 有限元 强度折减法 根系护坡 

分 类 号：TU472.99[建筑科学—结构工程]