Experimental Study on Effects of Geometric Characteristics of Shrub Roots on Pulling Force

CHANG Jingmei; WANG Guiyao; HU Shenghui; ZHANG Yongjie; FU Jinliang; ZHOU Weizheng

doi:10.13961/j.cnki.stbctb.2018.06.011

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Experimental Study on Effects of Geometric Characteristics of Shrub Roots on Pulling Force

- Experimental Study on Effects of Geometric Characteristics of Shrub Roots on Pulling Force
- Bulletin of Soiland Water Conservation Vol. 38, Issue 6, Pages: 67-73(2018)
- 作者机构：
  
  1. 长沙理工大学土木工程学院,湖南,长沙,410114
  2. 广西路桥工程集团有限公司,广西,南宁,530011
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.06.011
  CLC：
- Published：2018
- 稿件说明：
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CHANG Jingmei, WANG Guiyao, HU Shenghui, et al. Experimental Study on Effects of Geometric Characteristics of Shrub Roots on Pulling Force[J]. Bulletin of Soiland Water Conservation, 2018, 38(6): 67-73.
DOI：

CHANG Jingmei, WANG Guiyao, HU Shenghui, et al. Experimental Study on Effects of Geometric Characteristics of Shrub Roots on Pulling Force[J]. Bulletin of Soiland Water Conservation, 2018, 38(6): 67-73. DOI： 10.13961/j.cnki.stbctb.2018.06.011.

摘要

[目的] 探究灌木根系几何特性对拉拔力的影响，为边坡防护植物物种的选择与植物价值的充分利用提供理论参考。[方法] 以红叶石楠为例，通过对多根系形态的灌木根系进行室外拉拔试验，研究不同含水率、根系形态、二级侧根等情况对根土间相互作用力的影响。[结果] Y型根系和水平根系最大拉拔力随土壤含水率的增加呈对数和指数函数减小，而主直根系最大拉拔力随土壤含水率的增加呈先增大后减小的趋势，最优含水率在17.5%左右；Y型根系的最大拉拔力随Y型根系夹角的增加逐渐增大，而根系全段激活时间随根系夹角的增加呈现先减小后增大的趋势，在夹角为75°时最容易被激活；Y型根系及主直根系的最大拉拔力均随二级侧根数的增加呈线性增加，且主直根系最大拉拔力的增加趋势大于Y型根系。主直根系在土壤含水率为10%，20%，25%时，拉拔曲线呈拉拔硬化型，含水率为15%时，拉拔曲线呈拉拔软化型；水平根系和Y型根系在含水率为15%，17.5%时，拉拔曲线呈拉拔硬化型，含水率为20%，22.5%，25%时，拉拔曲线呈拉拔软化型。[结论] 根系形态与含水率是影响根系拉拔力的关键因素，根系形态越复杂，拉拔力越大；含水率越高，拉拔曲线逐渐由硬化向软化型转变。

Abstract

[Objective] The effects of the geometric characteristics of the shrub root on pulling force is studied in order to provides a theoretical reference for the selection of plant species and the full utilization of plant value.[Methods] Taking photinia fraseri as an example

the outdoor pull-out test of photinia fraseri root system was carried out to study the interaction between root and soil in different water gradients

root form

secondary side root and so on.[Results] The maximum pulling force of the Y-type root system and horizontal root system decreased logarithmically and exponentially with increasing moisture content. However

the maximum pulling force of the main direct root system increased first and then decreased with the increase of water content

and the optimum moisture content was about 17.5%. The maximum pulling force of the Y-type root system increased with the increase of the root system angle. The activation time of the root system increased first and then increased with the increase of the angle of the root system. It was most easily activated when the angle was 75°. The maximum tensile force of the Y-type root system and the main direct root system increased linearly with the increase of the number of secondary lateral roots

but the increase of the maximum tensile force of the main direct root system was greater than that of the Y-type root system. The drawing curve was drawn hardened when the water content was 10%

20% and 25%

and the drawing curve was a pull-softening type when the water content was 15%. When the horizontal root system and the Y-type root system were in the water-bearing rate of 15% and 17.5%

the drawing curve was drawn hardened

and when the water content was 20%

22.5% and 25%

the drawing curve was a pull-softening type. Through the comparison of the effects of different root system slopes

the mechanical of the multi-form root vegetation slope was evaluated

which had a theoretical guiding effect on ecological protection.[Conclusion] Root morphology and water content are the key factors affecting the pullout force of roots. The more complex the root morphology

the greater the pulling force. As the water content increases

the drawing curve gradually changes from hardening to softening.

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references

曹云生,陈丽华,刘小光,等.植物根土界面摩擦力的影响因素研究[J].摩擦学学报,2014,34(5):482-488.

林木根系与土壤摩擦锚固性能研究[D].北京:北京林业大学,2013.

解明曙.树木根系固坡土力学机制研究闭[J].水土保持学报,1990,4(3):7-11.

Turmanina V. On the strength of tree roots[J]. Bulletin of Moscow of Society. Naturalists, Biol. Secramine,1965,70(5):36-45.

陈昌富,刘怀星,李亚平,等.草根加筋土的室内三轴试验研究[J].岩土力学,2007,28(10):2041-2045.

刘小光.林木根系与土壤摩擦锚固性能研究[D].北京:北京林业大学,2013.

朱清科,陈丽华,张东升,等.贡嘎山森林生态系统根系固土力学机制研究[J].北京林业大学学报,2002,24(4):64-67.

张东升.长江上游暗计叶林林木根系抗拉力学特性研宄[D].北京:北京林业大学,2002.

周朔.林木根系拉伸力学特性研宄[D].北京:北京林业大学,2011.

李为萍,史海滨,梁建财,等.基于三轴试验的根土复合体抗剪性能试验研究[J].灌溉排水学报,2013,32(2):128-130.

刘秀萍,陈丽华,宋维峰,等.林木根系与黄土复合体的抗剪强度试验研究[J].北京林业大学学报,2006,28(5):67-72.

刘亚斌,胡夏嵩,余冬梅,等.西宁盆地黄土区2种灌木植物根-土界面微观结构特征及摩擦特性试验[J].岩石力学与工程学报,2018,37(5):1270-1280.

赵晓黎.植物根系拉拔模型试验研究[D].四川成都:西南交通大学,2015.

Waldron L J, Dakessian S. Soil reinforcement by roots:Calculation of increased soil shear resistance from root properties[J]. Soil Science, 1981,132(6):427-435.

Norris J N. Root reinforcement by hawthorn and oak roots on a highway cut slope in Southern England[J]. Plant and Soil, 2005,278(1/2):43-53.

刘亚斌,余冬梅,付江涛,等.黄土区灌木柠条锦鸡儿根-土间摩擦力学机制试验研究[J].农业工程学报,2017,33(10):198-205.

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