摘要
为了解植物根系对浅层边坡稳定性的影响,通过室内剪切试验得到根土复合体的抗剪强度指标,采用无限边坡理论,考虑植物根系是否穿过滑裂面两种情况,分析含水率、含根量、边坡坡度对浅层边坡稳定性的影响。结果表明:根系没有穿过滑裂面时,对边坡稳定性影响很小,若考虑根系的加筋作用则会高估其对边坡稳定性的影响;根系穿过滑裂面时,可以提高土体的抗剪强度,从而增强边坡的稳定性、提高边坡稳定系数,当含水率为16%时其稳定系数增幅最大、含水率为18%时增幅最小,因此在植物护坡工程设计中应找到最优含水率,以满足稳定性要求和促进植物的生长。
In order to understand the influence of plant roots to the stability of the shallow slope,the shear strength index of the rootsoil complex was obtained through the laboratory shear test.The infinite slope theory was adopted to analyze the influence of water content,root content and slope on the stability of the shallow slope considering whether the plant roots passed through the sliding surface.The results show that when the roots do not cross the sliding surface,they have little influence to the slope stability.When the roots cross the critical slip surface,they can improve the shear strength of soil mass,thereby enhancing the stability of the slope and the slope stability coefficient has an increase.The stability coefficient has the maximum increase when the moisture content is 16%.When the moisture content is 18%,the stability coefficient has the minimum increase.In conclusion,the design of vegetation slope protection engineering should aim at the optimum moisture content in order to meet the stability requirements and promote the growth of plants.
作者
蒋希雁
何春晓
董捷
黄前龙
JIANG Xiyan;HE Chunxiao;DONG jie;HUANG Qianlong(Hebei Key Laboratory for Diagnosis,Reconstruction and Anti-Disaster of Civil Engineering,Zhangjiakou 075000,China;Hebei University of Architecture,Zhangjiakou 075000,China)
出处
《人民黄河》
CAS
北大核心
2020年第8期109-112,共4页
Yellow River
基金
河北省自然科学基金资助项目(E2017404013)
河北省教育厅重点科研项目(ZD2017224)
张家口市科技计划项目(1611063B)。
关键词
稳定系数
边坡坡度
滑裂面
含水率
含根量
stability coefficient
slope gradient
slip surface
moisture content
root content
