Effects of Hypericum Perforatum Roots on Shear Strength of Slope Soil

Xue Hailong; Tang Biao; Zhang Jingyuan; Shen Yanhui; Xu Jianxin; Wang Ying

doi:10.13961/j.cnki.stbctb.2019.03.015

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Effects of Hypericum Perforatum Roots on Shear Strength of Slope Soil

- Effects of Hypericum Perforatum Roots on Shear Strength of Slope Soil
- Bulletin of Soiland Water Conservation Vol. 39, Issue 3, Pages: 87-92(2019)
- 作者机构：
  
  深圳市铁汉生态环境股份有限公司,广东,深圳,518040
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.03.015
  CLC： S157
- Published：2019
- 稿件说明：
移动端阅览
Xue Hailong, Tang Biao, Zhang Jingyuan, et al. Effects of Hypericum Perforatum Roots on Shear Strength of Slope Soil[J]. Bulletin of Soiland Water Conservation, 2019, 39(3): 87-92.
DOI：

Xue Hailong, Tang Biao, Zhang Jingyuan, et al. Effects of Hypericum Perforatum Roots on Shear Strength of Slope Soil[J]. Bulletin of Soiland Water Conservation, 2019, 39(3): 87-92. DOI： 10.13961/j.cnki.stbctb.2019.03.015.

摘要

[目的]探讨根系单根抗拉拔强度对边坡土体抗剪强度的影响，定量分析根系对边坡土体抗剪强度的增强作用，为评价植物根系增强边坡土体抗剪切性能提供依据。[方法]以2 a生尖萼金丝桃根系及其组成的根土复合体为研究对象，分别进行室内单根拉拔试验和根土复合体剪切试验，获得根系的抗拉强度及根土复合体试样黏聚力值；在此基础上分析根系抗拉强度与根土复合体黏聚力值之间的关系。[结果]尖萼金丝桃根系抗拉强度与根系直径存在负向幂函数关系，相关性系数均大于0.92；根系拉拔位移、抗拉拔力均与根系直径呈正相关关系，拉拔位移与抗拉拔力之间也表现为显著正相关关系；抗拉强度与根系直径、拉拔位移、抗拉拔力两两之间均呈负相关关系；根土复合体的黏聚力相较于无根素土均有不同程度的增长，增幅达17.25%~94.76%，黏聚力、黏聚力增长率均与根土面积比、根土体积比呈正相关关系。[结论]尖萼金丝桃根系拉拔特征对边坡土体抗剪强度产生显著的影响，边坡土体抗剪切性能评价指标与根系拉拔特征变化密切相关。

Abstract

[Objective] The effects of single root pulling strength on the shear strength of slope soil were investigated

and the effect of root on the shear strength of slope soil was quantitatively analyzed in order to provide a basis for evaluating the shear strength of slope soil strengthened by plant roots.[Methods] The root-soil complex of 2-year-old Hypericum acmosepalum was studied. The indoor single-strand pull test and the root-soil composite shear test were conducted to obtain the tensile strength of the root system. The relationship between the root tensile strength and the cohesion force of the root-soil composite was analyzed.[Results] There was a negative power function relationship between the tensile strength and root diameter of H. acmosepalum

and the correlation coefficient was greater than 0.92. The root pullout displacement and tensile force were positively correlated with root diameter

and there was also a significant positive correlation between the pullout displacement and tensile force. The tensile strength was negatively correlated with root diameter

the pullout displacement and the pullout force

and the cohesive force of the root-soil composite increased by 17.25%~94.76%

compared with that of the rootless soil. The cohesion and cohesion growth rates were positively correlated with root-soil area ratio and root-soil volume ratio.[Conclusion] The pullout characteristics of the H. acmosepalum root have a significant influence on the shear strength of the slope soil

and the evaluation indexes of the shear resistance of the slope soil are closely related to the changes of the root pullout characteristics.

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references

余芹芹,胡夏嵩,李国荣,等.寒旱环境灌木植物根土复合体强度模型试验研究[J].岩石力学与工程学报,2013,32(5):1020-1031.

杨悦舒,夏振尧,肖海,等.多花木蓝根土复合体抗剪强度试验研究[J].长江科学院院报,2014,31(4):72-76.

惠尚,张云伟,刘晶,等.丛生竹根系抗拉拔力学特性[J].山地学报,2013,31(1):65-70.

赵亮.根土复合体抗剪强度试验研究[D].长沙:中南林业科技大学,2014.

李华坦,李国荣,赵玉娇,等.模拟自然降雨条件下植物根系增强边坡土体抗剪强度特征[J].农业工程学报,2016,32(4):142-149.

李国荣,胡夏嵩,毛小青,等.青藏高原东北部黄土区灌木植物根系护坡效应的数值模拟[J].岩石力学与工程学报,2010,29(9):1877-1884.

王帅.不同配比深、浅根系植物对边坡抗冲、抗剪性能影响试验[J].公路交通科技,2013,30(12):39-43.

胡敏,李为萍,史海滨,等.布根方式及根系径级对根土复合体抗剪性能的影响[J].水土保持通报,2012,32(1):42-44.

周涛,刘枭宏,谌芸,等.狗牙根和三叶草的根系特征及对荒坡紫色土抗剪性能的影响[J].草业科学,2018,35(3):463-471.

李为萍,胡敏,史海滨.沙地柏根系径级对根土复合体抗剪强度的影响[J].土壤通报,2012,43(4):935-937.

杨苑君.华北典型乔木根系抗拉及土壤抗剪性能研究[D].北京:北京林业大学,2016.

蒋必凤.牛筋草根土复合体抗剪性能研究[J].山西建筑,2016,35(1):63-65.

万娟.草灌生态护坡力学性能研究[D].武汉:华中科技大学,2015.

Ghestem M, Veylon G, Bernard A, et al. Influence of plant root system morphology and architectural traits on soil shear resistance[J]. Plant and Soil, 2014,377(1):43-61.

赵玉娇,胡夏嵩,李华坦,等.寒旱环境灌木根系增强边坡土体抗剪强度特征[J].农业工程学报,2016,32(11):174-180.

张翔宇,杨平,王磊,等.植被根系对土体抗剪强度影响的试验研究[J].武汉理工大学学报,2012,34(4):113-117.

格日乐,刘艳琦,左志严,等.根系固土主要力学因子的主成分分析[J].内蒙古农业大学学报:自然科学版,2015,36(6):39-47.

邓佳.南方红壤区常见草本根土复合体生物力学抗蚀机理研究[D].武汉:华中农业大学,2015.

刘福全.植物枝叶与根系固土抗蚀差异性研究[D].呼和浩特:内蒙古农业大学,2015.

李云鹏,张会兰,王玉杰,等.针叶与阔叶树根系对土壤抗剪强度及坡体稳定性的影响[J].水土保持通报,2014,34(1):40-45.

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