土体粒径对盐生植物根–土复合体抗剪强度影响的试验研究

doi:10.13722/j.cnki.jrme.2015.0042

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (890 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为研究盐生植物根系的固土护坡力学效应，探讨土体粒径对植物根系加筋固土作用和提高土体抗剪强度的影响。以青海柴达木盆地大柴旦盐湖区为研究区，选取海韭菜(Triglochin maritima Linn.)和无脉苔草(Carex enervis C.A.Mey.)2种优势盐生植物作为供试种，选取粒径大小分别为颗粒直径d≤0.25 mm和d≤0.5 mm粒径条件下的2种土体，制备根–土复合体扰动试样和不含根系素土扰动试样，分别进行了不固结不排水三轴压缩试验，以探讨2种盐生植物增强土体抗剪强度贡献，以及2种粒径条件下的根–土复合体抗剪强度指标变化规律；在此基础上，探讨土体粒径差异对根–土复合体抗剪强度的影响。试验结果表明：盐生植物根系加筋固土作用主要表现为在2种不同土体粒径条件下，海韭菜根–土复合体与无脉苔草根–土复合体抗剪强度强度均显著大于素土抗剪强度，且垂直布根海韭菜根–土复合体的抗剪强度显著大于水平或倾斜布根无脉苔草根–土复合体抗剪强度；土体粒径的差异可影响植物根系增强土体抗剪强度大小，即主要表现为在相同的含根量条件下，土体粒径愈小，由该粒径土体与根系共同组成的根–土复合体黏聚力值则愈大。同时，进一步研究表明，水平或倾斜布根的无脉苔草根–土复合体的抗剪强度受土体粒径大小的影响，相对大于垂直布根的海韭菜根–土复合体中的土体粒径大小对其抗剪强度影响。研究成果对于进一步探讨盐生植物根–土复合体抗剪强度的影响因素，以及利用盐生植物有效防治研究区水土流失、土壤侵蚀等地质灾害方面具有重要理论指导意义。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：土力学, 柴达木盆地, 大柴旦盐湖区, 盐生植物, 根系, 土体粒径, 根–土复合体抗剪强度

Abstract：To study the mechanical effect of slope protection by halophytes and to investigate the influence of grain size on the shear strength of the rooted soil，Qaidam Basin in Qinghai province was selected as the test site and 2 halophytes(Triglochin maritima Linn. and Carex enervis C.A.Mey) were selected for study. To investigate the contribution of halophytes to the shear strength of the rooted soil and the variation of shear strengths，undrained-unconsolidation triaxial compression tests were conducted on the rooted soil and non-rooted soil samples with the grain size d≤0.25 mm and d≤0.5 mm prepared by sieving and remolding. The results showed that halophytes played significant roles in soil reinforcement. The shear strengths of rooted soil for T. maritima and C. enervis were notably larger than those of non-rooted soil and the shear strength of the vertically rooted soil was larger than that of horizontally rooted soil. The grain size influenced the shear strength of the soil. Under the same root content，the rooted soil with smaller grain size had larger value in cohesion force. The horizontally rooted soil of C. enervis was notably influenced by the grain size than the vertically rooted soil of T. maritima in shear strength of the soil.

Key words： soil mechanics Qaidam basin Da Qaidam salt lake halophyte root system grain size shear strength of rooted soil

引用本文:

栗岳洲1，2，付江涛1，2，胡夏嵩1，3，余冬梅1，朱海丽1，2，虎啸天1，2，李光莹1，2. 土体粒径对盐生植物根–土复合体抗剪强度影响的试验研究[J]. 岩石力学与工程学报, 2016, 35(2): 403-412.
LI Yuezhou1，2，FU Jiangtao1，2，HU Xiasong1，3，YU Dongmei1，ZHU Haili1，2，HU Xiaotian1，2，LI Guangying1，2. Experimental study of the influence of grain size on the shear strength of rooted soil. , 2016, 35(2): 403-412.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.0042 或 http://www.rockmech.org/CN/Y2016/V35/I2/403

[1]	杨永红，王成华，刘淑珍，等. 不同植被类型根系提高浅层滑坡土体抗剪强度的试验研究[J]. 水土保持研究，2007，14(2)：233–235.(YANG Yonghong，WANG Chenghua，LIU Shuzhen，et al. Experimental research on improving shear strength of soil in surface landslide by root system of different vegetation type[J]. Research of Soil and Water Conservation，2007，14(2)：233–235.(in Chinese))
[6]	ABDI E，MAJNOUNIAN B，RAHIMI H，et al. Distribution and tensile strength of Hornbeam(Carpinus betulus) roots growing on slopes of Caspian Forests，Iran[J]. Journal of Forestry Research，2009，20(2)：105–110.
[26]	邴慧，武俊杰，邓津. 黄土状盐渍土洗盐前后物理力学性质的变化[J]. 冰川冻土，2011，33(4)：796–800.(BING Hui，WU Junjie，DENG Jin. Variations of physical and mechanical properties of saline loess before and after desalting[J]. Journal of Glaciology and Geocryology，2011，33(4)：796–800.(in Chinese))
[27]	石崇喜，黄英，杨玉婷，等. 掺砂红土的力学特性及掺砂机制研究[J]. 工程勘察，2011，39(4)：1–8.(SHI Chongxi，HUANG Ying，YANG Yuting，et al. Research on mechanical properties and sand-doped mechanism of the laterite improved with sand[J]. Geotechnical Investigation and Surveying，2011，39(4)：1–8.(in Chinese)) " target="_blank">
[4]	余芹芹，乔娜，卢海静，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(增1)：3 216–3 223.(YU Qinqin，QIAO Na，LU Haijing，et al. Effect study of plant roots reinforcement on soil[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.1)：3 216–3 223.(in Chinese))
[7]	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.(HUI Shang，ZHANG Yunwei，LIU Jing，et al. Mechanical characteristics of tensile strength of sympodial bamboo roots[J]. Journal of Mountain Science，2013，31(1)：65–70.(in Chinese))
[10]	宋维峰. 林木根系与均质土间相互物理作用机制研究[博士学位论文][D]. 北京：北京林业大学，2006.(SONG Weifeng. Study on physical mechanism of interface between root system and loess soils[Ph. D. Thesis][D]. Beijing：Beijing Forestry University，2006.(in Chinese)) " target="_blank">
[11]	ZHANG C B，CHEN L H，LIU Y P，et al. Triaxial compression test of soil-root composites to evaluate influence of roots on soil shear strength[J]. Ecological Engineering，2010，36(1)：19–26.
[14]	张爱国，李锐，杨勤科. 中国水蚀土壤抗剪强度研究[J]. 水土保持通报，2001，21(3)：5–9.(ZHANG Aiguo，LI Rui，YANG Qinke. Study on soil anti-shearing intensity of water erosion in China[J]. Bull Soil Water Conservation，2001，21(3)：5–9.(in Chinese))
[15]	胡宁，刘静，姚喜军，等. 快剪条件下柠条根对3种土壤土工特性的影响[J]. 水土保持学报，2014，28(1)：106–111.(HU Ning，LIU Jing，YAO Xijun，et al. Effect of Caragana Microphylla roots on geotecnical properties of three soil types under fast shear condition[J] Journal of Soil and Water Conservation，2014，28(1)：106–111.(in Chinese)) " target="_blank">
[21]	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.(HU Min，LI Weiping，SHI Haibin，et al. Effects of root layout and diameter on shear performance in root-soil composite[J]. Bulletin of Soil and Water Conservation，2012，32(1)：42–44.(in Chinese))
[22]	胡夏嵩，毛小青，朱海丽，等. 青藏高原植被护坡[M]. 北京：地质出版社，2011：85–89.(HU Xiasong，MAO Xiaoqing，ZHU Haili，et al. Slope protection with vegetation on Qinghai-Tibet Plateau[M]. Beijing：Geological Publishing House，2011：85–89.(in Chinese)) " target="_blank">
[25]	NORMANIZA O，FAISAL H A，Barakbah S S. Engineering properties of Leucaena leucocephala for prevention of slope failure[J]. Ecological Engineering，2008，32(3)：215–221.
[2]	HU X S，BRIERLEY G，ZHU H L，et al. An exploratory analysis of vegetation strategies to reduce shallow landslide activity on loess hillslopes，northeast Qinghai—Tibet Plateau，China[J]. Journal of Mountain Science，2013，10(4)：668–686. " target="_blank">
[5]	朱海丽，胡夏嵩，毛小青，等. 青藏高原黄土区护坡灌木植物根系力学特性研究[J]. 岩石力学与工程学报，2008，27(增2)：3 445–3 452.(ZHU Haili，HU Xiasong，MAO Xiaoqing，et al. Study on mechanical characteristics of shrub roots for slope protection in loess area of Tibetan Plateau[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.2)：3 445–3 452.(in Chinese))
[3]	ZHANG C B，CHEN L H，JIANG J. Vertical root distribution and root cohesion of typical tree species on the loess Plateau，China[J]. Journal of Arid Land，2014，6(5)：601–611.
[13]	王云琦，王玉杰，张洪江，等. 重庆缙云山不同土地利用类型土壤结构对土壤抗剪性能的影响[J]. 农业工程学报，2006，22(3)：40–45.(WANG Yunqi，WANG Yujie，ZHANG Hongjiang，et al. Impacts of soil structure on shear-resistance of soil under different land uses in Jinyun mountain of Chongqing city[J]. Transactions of the Chinese Society of Agricultural Engineering，2006，22(3)：40–45.(in Chinese))
[17]	KHAYAT N，ALBOSHOKE S M. Effect of fine content on drained shear strength of mix materials[J]. Advances in Environmental Biology，2014，8(1)：47–51. " target="_blank">
[8]	胡其志，周政，肖本林，等. 生态护坡中土壤含根量与抗剪强度关系试验研究[J]. 土工基础，2010，24(5)：85–87.(HU Qizhi，ZHOU Zheng，XIAO Benlin，et al. Experimental research on relationship between root weight and shearing strength in soil[J]. Soil Engineering and Foundation，2010，24(5)：85–87.(in Chinese))
[9]	李为萍，史海滨，胡敏. 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)：934–937.(LI Weiping，SHI Haibin，HU Min. The effect of root diameter of sabina vulgaris on the shear strength in root-soil composites[J]. Chinese Journal of Soil Science，2012，43(4)：934–937.(in Chinese))
[12]	朱海丽，胡夏嵩，毛小青，等. 护坡植物根系力学特性与其解剖结构关系[J]. 农业工程学报，2009，25(5)：40–46.(ZHU Haili，HU Xiasong，MAO Xiaoqing，et al. Relationship between mechanical characteristics and anatomical structures of slope protection plant root[J]. Transactions of the CSAE，2009，25(5)：40–46.(in Chinese))
[16]	HUANG M Y，XIONG J L，TANG J B，et al. Experimental study on shear strength of expansive soil improved by lime-weathered sand[J]. Applied Mechanics and Materials，2014，446：1 441–1 447. " target="_blank">
[18]	高春亮，张丽莎，余俊清，等. 大柴旦盐湖卤水演变及环境变化的矿物学记录[J]. 地球化学，2011，40(2)：156–162.(GAO Chunliang，ZHANG Lisa，YU Junqing，et al. A mineralogical record of brine evolution and environmental change from Da Qaidam salt lake in the northern qaidam basin[J]. Geochimica，2011，40(2)：156–162.(in Chinese))
[19]	肖莲桂，石明章. 大柴旦地区气候对生态环境的影响分析[J]. 青海气象，2012，(4)：52–54.(XIAO Liangui，SHI Mingzhang. An analysis on climate impact the ecological environment in DA Qaidam region[J]. Journal of Qinghai Meteorology，2012，(4)：52–54.(in Chinese))
[28]	王星华，黄长溪，隆威. 直接快剪条件下黏土抗剪强度影响因素探讨[J]. 铁道科学与工程学报，2012，9(5)：46–49.(WANG Xinghua，HUANG Changxi，LONG Wei. Shear strength factors of clayey soils under the condition of direct fast shear[J]. Journal of Railway Science and Engineering，2012，9(5)：46–49.(in Chinese))
[20]	中华人民共和国行业标准编写组. SL237—1999土工试验规程[S]. 北京：中国水利水电出版社，1999.(The Professional Standards Compilation Group of People?s Republic of China. SL237—1999 Soil test procedures[S]. Beijing：China Water Power Press，1999.(in Chinese)) " target="_blank">
[23]	单炜，孙玉英，王强，等. 高等级公路边坡植物护坡机制与深根锚固作用[J]. 东北林业大学学报，2008，36(11)：59–60. (SHAN Wei，SUN Yuying，WANG Qiang，et al. Mechanism of biotechnical slope protection for highway slope and anchorage effect of deep-rooted plants[J]. Journal of Northeast Forestry University，2008，36(11)：59–60.(in Chinese)) " target="_blank">
[24]	张超波，陈丽华，刘秀萍. 黄土高原刺槐根系固土的力学增强效应评价[J]. 水土保持学报，2009，23(2)：57–60.(ZHANG Chaobo，CHEN Lihua，LIU Xiuping. Triaxial compression test of loess-root composites to evaluate mechanical effect of roots on reinforcing soil[J] Journal of Soil and Water Conservation，2009，23(2)：57–60.(in Chinese))