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[1]ZHAO Yujiao,HU Xiasong,LIU Changyi,et al.Research on Soil Shear Strength Reinforced by Vegetation Roots in Slope of Cold and Arid Environments[J].Research of Soil and Water Conservation,2016,23(04):212-220.

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Research on Soil Shear Strength Reinforced by Vegetation Roots in Slope of Cold and Arid Environments

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 04 Page number: 212-220 Column: Public date: 2016-04-28

Title:: Research on Soil Shear Strength Reinforced by Vegetation Roots in Slope of Cold and Arid Environments

Author(s):: ZHAO Yujiao¹, HU Xiasong^1,2, LIU Changyi¹, DOU Zengning¹, LI Guorong¹; 1. Department of Geological Engineering, Qinghai University, Xi’ning, Qinghai 810016, China;
2. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xi’ning, Qinghai 810008, China

Keywords:: cold and arid environments; root-soil composite system; shear strength; shear test

CLC:: TU411.7

DOI:: -

Abstract:: The experimental site of this study is set up in Qinghai University, Xining Basin. We take root-soil composite systems in layer A (0 cm) and layer B (20 cm beneath the ground surface) on the slope with the planted herbs and shrubs by the approach of herbs and shrubs single planting and mixing planting, and from bare slope as shear test samples. And the characteristics of soil shear strength of the slope with herbs and shrubs are analyzed. The results show that:(1) the cohesion forces of root-soil composite systems in layer A of the slope with the 2 herbs are 24.09 kPa and 22.81 kPa, respectively, both of which are higher than the cohesion forces (19.03 kPa, 17.91 kPa) of root-soil composite systems in layer A of the slope with 2 shrubs. Compared with the cohesion force of bare slope, the increased cohesion force amplitudes of root-soil composite systems of herbs are 104.67% and 93.80%, respectively, the increased cohesion force amplitudes of root-soil composite systems of shrubs are 61.68% and 52.17%, respectively, so the increased cohesion force amplitudes of root-soil composite systems of herbs are much higher than shrubs; (2) the cohesion force of root-soil composite systems of the slope with 2 herbs decreased from 24.09 kPa, 22.81 kPa to 19.06 kPa, 21.02 kPa with the increase of soil depth, which reflects the reinforcement by herb root in the shallow layer of the slope is significant; (3) the increased cohesion force of root-soil composite systems of the mixture of 2 herbs and 2 shrubs is higher than that of single plant. The increased cohesion force amplitude of root-soil composite systems of the mixture of 2 herbs and 2 shrubs is 0.13%~42.83%. This study provides theoretical support for quantifying the contribution of vegetation roots to soil shear strength under different planting patterns, and it also has theoretical value and significance in further discussing the mechanism of soil shear strength reinforcement by roots on slope.

References:: [1] 韦仕川,栾乔林,黄朝明,等.地质灾害防治的土地利用规划软措施研究综述及展望[J].自然灾害学报,2014,23(3):159-165.
[2] 惠尚,张云伟,刘晶,等.丛生竹根系抗拉力学特性[J].山地学报,2013,31(1):65-70.
[3] Katuwal S, Vermang J, Cornelis W M, et al. Effect of root density on erosion and erodibility of a loamy soil under simulated rain[J]. Soil Science,2013,178(1):29-36.
[4] 郑启萍,徐得潜.草本植物护坡机理及其固土效应试验研究[J].合肥工业大学学报:自然科学版,2014,37(2):225-228.
[5] 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.
[6] 赵玉娇,胡夏嵩,刘昌义,等.植物根-土复合体剪切试验及其力学模型研究现状与展望[J].中国水土保持,2015(10):51-55,80.
[7] 李国荣,陈文婷,胡夏嵩,等.青藏高原东北部黄土地区降雨入渗对土质边坡稳定性的影响研究[J].水文地质工程地质,2015,42(2):105-111.
[8] 李光莹,胡夏嵩,虎啸天,等.黄河源玛沁地区高寒草地植物固土护坡的力学效应[J].山地学报,2014,32(5):550-560.
[9] 朱锦奇,王云琦,王玉杰,等.基于试验与模型的根系增强抗剪强度分析[J].岩土力学,2014,35(2):449-458.
[10] Loades K W, Bengough A G, Bransby M F, et al. Planting density influence on fibrous root reinforcement of soils[J]. Ecological Engineering,2010,36(3):276-284.
[11] 陆桂红,欧国强,杨顺,等.泥石流源区典型草本植物根系抗拉试验[J].山地学报,2014,32(6):725-731.
[12] 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.
[13] 栗越州,付江涛,余冬梅,等.寒旱环境盐生植物根系固土护坡力学效应及其最优含根量探讨[J].岩石力学与工程学报,2015,34(7):1371-1383.
[14] 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(1/2):43-61.
[15] 郭翬,王云琦,王青兰,等.根系逐渐破坏过程中固土效果研究[J].北京林业大学学报,2014,38(6):1-8.
[16] 刘治兴,杨建英,杨洋,等.高速公路不同植物防护边坡根土复合体抗剪能力研究[J].生态环境学报,2015,24(4):631-637.
[17] Katuwal S, Vermang J, Cornelis W M, et al. Effect of root density on erosion and erodibility of a loamy soil under simulated rain[J]. Soil Science,2013,178(1):29-36.
[18] 梅朵,高原,马艳,等.近50 a青海西宁气温变化特征[J].干旱气象,2013,31(1):100-106.
[19] 王颖华,张鑫.西宁降水量特征及变化趋势分析[J].水土保持研究,2011,18(5):156-160.
[20] 中国科学院西北高原生物研究所.青海植物志(第2卷)[M].西宁:青海人民出版社,1997.
[21] 梁泉,廖红,严小龙.植物根构型的定量分析[J].植物学通报,2008,24(6):695-702.
[22] 卢海静,余芹芹,胡夏嵩,等.西宁盆地黄土区草本植物群根效应及其护坡贡献[J].中国水土保持,2013(12):55-59,77.
[23] 乔娜.寒旱环境植物根系增强边坡土体强度力学效应研究[D].西宁:青海大学,2012.
[24] 黄晓乐.草本植物根系对植被混凝土基材浅层抗剪强度的影响[D].湖北宜昌:三峡大学,2011.
[25] 李建兴,何丙辉,谌芸,等.不同护坡草本植物的根系分布特征及其对土壤抗剪强度的影响[J].农业工程学报,2013,29(10):144-152.
[26] 王华.植被护坡根系固土及坡面侵蚀机理研究[D].成都:西南交通大学,2010.
[27] 李建兴,何丙辉,谌芸.不同护坡草本植物的根系特征及对土壤渗透性的影响[J].生态学报,2013,33(5):1535-1544.
[28] 黄晓乐,周正军,许文年.植被混凝土基材2种草本植物根-土复合体抗剪强度与根系分形特征研究[J].三峡大学学报:自然科学版,2012,34(2):59-62.
[29] 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.
[30] 姚喜军,刘静,王林和,等.快剪条件下柠条和沙地柏根系提高土壤抗剪特性研究[J].内蒙古农业大学学报:自然科学版,2008,29(4):82-86.
[31] 廖晶晶,罗绪强,罗光杰,等.三种护坡植物根-土复合体抗剪强度比较[J].水土保持通报,2013,33(5):118-122.
[32] 李国荣,毛小青,倪三川,等.浅析灌木与草本植物护坡效应[J].草业科学,2007,24(6):86-89.
[33] 肖宏彬,田青青,李珍玉,等.林草混交根-土复合体的抗剪强度特性[J].中南林业科技大学学报,2014,34(2):1-5.
[34] 余芹芹,乔娜,胡夏嵩,等.植物根系对土体加筋效应研究[J].岩石力学与工程学报,2012,31(S1):3216-3223.

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